Pre-Sales Solutions Engineer

Commercial | EMEA | Italian Speaking

About the Opportunity

Solutions Engineers at Klaviyo are technical sellers at the heart of our revenue motion. We don't just demo software. We work as trusted advisors, helping fast-growing commercial businesses understand how Klaviyo can solve their real challenges, and then we prove it.

We're looking for a Pre-Sales Solutions Engineer to join our EMEA Commercial team, covering the Entrepreneur and SMB segment. This is a great opportunity for someone early in their pre-sales career who is curious, eager to learn, and excited by the intersection of technology and sales. You don't need to have all the answers on day one. What matters is that you ask great questions, pick things up quickly, and genuinely want to help customers succeed.

You'll work alongside Account Executives across the Italian-speaking market and wider EMEA region, supporting the technical side of deals and building your skills in a collaborative, high-energy team environment.

What We Do as Solutions Engineers

We're technical sellers who drive revenue by winning Commercial deals. Our job is to own the technical win. That means building champions, demonstrating clear value, and making sure prospects choose Klaviyo.

We work directly with customers to design solutions that integrate into their existing tech stacks, taking a consultative approach that builds confidence and gets buy-in from both technical and business stakeholders.

Our team builds beyond the day-to-day too. Recent projects include AI-powered demo data generators, a Chrome extension for troubleshooting API calls, and templatised mobile apps to showcase our SDK capabilities. We're a team that builds things to solve problems, and we'd love you to grow into that.

How You'll Make a Difference

Support the Technical Win

• Work alongside Account Executives to support the technical side of Commercial opportunities from qualification through to close.
• Participate in technical discovery conversations, learning how to uncover a prospect's goals, current tools, and key constraints.
• Deliver product demos and presentations to business and technical audiences, connecting Klaviyo's capabilities to what the customer actually cares about.
• Help scope proofs of concept and pilot projects, supporting delivery and keeping stakeholders informed along the way.
• Learn how to handle common objections and navigate competitive questions with guidance from the broader team.

Build Customer Confidence

• Develop a strong understanding of Klaviyo's platform, APIs, and integrations so you can answer technical questions clearly and confidently.
• Build relationships with prospects and support them on topics like data strategy, integrations, and implementation approach.
• Collaborate with Product, Engineering, and Support on RFPs, security reviews, and technical evaluations where needed.
• Start building knowledge of the competitive landscape so you can add value in deal conversations over time.

Contribute to the Team

• Help build and improve repeatable assets like demo narratives, templates, and playbooks that make the wider team more effective.
• Use AI tools to support your work, from research and demo prep to light automation.
• Share what you're hearing from customers back to Product and GTM teams, especially around gaps and trends in the SMB segment.

Who You Are

Required

• Fluent in Italian and English, written and spoken.
• 1+ years of experience in a pre-sales, solutions engineering, technical sales, or customer-facing technical role at a B2B SaaS company.
• Curiosity about technology and a genuine interest in how businesses use data and marketing tools to grow.
• Comfortable talking to both technical and non-technical stakeholders and adapting your communication style accordingly.
• Good at explaining things clearly, whether that's a technical concept to a marketer or a business problem to a developer.
• Willing to run live product demos and get comfortable thinking on your feet when questions come up.
• A proactive mindset and willingness to learn quickly in a fast-moving environment.

Nice to Have

• Some familiarity with web technologies, REST APIs, or data integrations, even if you haven't worked with them professionally.
• Exposure to marketing technology, eCommerce platforms (e.g. Shopify, Magento), or customer engagement tools.
• Basic experience with JavaScript, Python, or SQL for exploring data or light integration work.
• Familiarity with AI-assisted tools (e.g. Claude, Cursor) and an interest in using them to work smarter.
• Any experience in a commercial or SMB-focused environment, whether in sales, support, or a technical capacity.
• Additional spoken European languages

What Sets You Apart

• You ask great questions and genuinely listen to the answers.
• You're not afraid to say you don't know something, but you always follow up with the answer.
• You pick up new tools and concepts quickly and enjoy figuring things out.
• You take ownership of your work and follow through without needing to be chased.
• You're excited about the idea of building a career in pre-sales and see this role as a serious starting point.

How We'll Measure Success

• Contribution to technical win rate in the Commercial segment.
• Quality of demos, discovery conversations, and handoffs to Customer Success and implementation teams.
• Speed and consistency in picking up product knowledge and ramping into deals.
• Contributions to team assets and the feedback you bring back from customer conversations.

#LI-Hybrid 

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Senior Pre-Sales Solutions Engineer

Commercial | EMEA | French Speaking

At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo brings to our workplace every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you're a close but not exact match with the description, we hope you'll still consider applying.

About the Opportunity

Solutions Engineers at Klaviyo are technical sellers at the heart of our revenue motion. We don't just demo software. We work as trusted advisors, helping fast-growing commercial businesses understand how Klaviyo can solve their real challenges, and then we prove it.

We're looking for a Senior Pre-Sales Solutions Engineer to join our EMEA Commercial team, covering the Entrepreneur and SMB segment. This is a role for someone who can move quickly through a sales cycle, run sharp discovery, design practical solutions, and deliver demos that actually land. You'll be comfortable talking to both developers and marketers, and you know how to adapt on the fly.

You'll work closely with Account Executives across the French-speaking market and wider EMEA region, owning the technical side of deals from first call through to close. You bring structure and momentum to the sales cycle without slowing it down.

What We Do as Solutions Engineers

We're technical sellers who drive revenue by winning Commercial deals. Our job is to own the technical win. That means building champions, demonstrating clear value, and making sure prospects choose Klaviyo.

We work directly with customers to architect solutions that integrate into their existing tech stacks, taking a consultative approach that builds confidence and secures buy-in from technical and business stakeholders alike.

Our team builds beyond the day-to-day too. Recent projects include AI-powered demo data generators, a Chrome extension for troubleshooting API calls, web SDK injectors, and templatised mobile apps to showcase our SDK capabilities. If you're someone who builds things to solve problems, you'll fit right in.

How You'll Make a Difference

Own the Technical Win

• Partner with Account Executives to lead the technical side of Commercial opportunities from qualification through to close.
• Run focused technical discovery to understand a prospect's goals, current stack, data flows, and constraints.
• Design solution architectures that make the most of Klaviyo's platform, APIs, and integrations to meet customer needs and best practices.
• Deliver tailored demos and presentations to both business and technical audiences, clearly connecting capabilities to real customer outcomes.
• Scope and lead proofs of concept where needed, defining success criteria and keeping things on track.
• Handle objections confidently, navigate competitive situations, and bring clear strategic thinking to deal with conversations.

Be a Trusted Advisor

• Act as a go-to resource for prospects on topics like data strategy, integrations, implementation approach, and long-term scalability.
• Bring subject matter expertise across marketing technology, eCommerce, CDPs, and customer data.
• Collaborate with Product, Engineering, and Support on RFPs, security reviews, and deeper technical evaluations.
• Stay close to the competitive landscape and bring that intelligence into deals in a way that's useful, not just informational.

Build and Contribute

• Contribute to repeatable assets like demo narratives, reference architectures, playbooks, and templates that help the broader team move faster.
• Use AI tools and automation to scale your own impact and improve how you work.
• Provide clear feedback loops to Product and GTM teams on feature gaps, market trends, and what SMB customers are actually asking for.
• Support partner and channel teams where relevant, helping them position and implement Klaviyo effectively for commercial customers.

Who You Are

Required

• Fluent in French and English, written and spoken.
• 3+ years of experience in a pre-sales, solutions engineering, or solutions architecture role at a B2B SaaS company.
• Solid understanding of web technologies, APIs, and data integrations including REST APIs, webhooks, and ecommerce or marketing platforms.
• Comfortable engaging with both technical stakeholders (developers, architects) and business stakeholders (marketing, operations, leadership).
• Strong customer-facing communication skills, with the ability to make complex concepts feel simple and relevant.
• Able to run live product demos and adjust in real time based on the conversation.
• Experience working with commercial customers, with an appreciation for their pace, constraints, and how to design practical solutions that fit.
• A bias toward action and solid problem-solving instincts in fast-moving sales cycles.

Nice to Have

• Hands-on experience with JavaScript, Python, or SQL for light technical validation, data exploration, or integration work.
• Background in marketing technology, CDPs, or customer engagement platforms.
• Familiarity with AI-assisted development tools (e.g. Claude Code, Cursor) and how to use them to move faster.
• Experience with ecommerce technology stacks such as Shopify, Magento, or custom storefronts.
• Experience working with partners or consultancies that serve SMB customers.

What Sets You Apart

• You've used AI to genuinely scale your effectiveness, whether that's through automation, research, demo prep, or light development.
• You roll up your sleeves and become the expert on whatever you need to know.
• You bring competitive intelligence into deals without it feeling like a script.
• You contribute to the team through the assets, playbooks, and feedback you leave behind.
• You thrive in a fast-moving environment and don't need everything mapped out to get started.

How We'll Measure Success

• Technical win rate and contribution to overall win rate in the Commercial segment.
• Quality and consistency of solution designs and handoffs to implementation and Customer Success teams.
• Impact on repeatable assets, team enablement, and process improvements for the broader go-to-market team.
• Feedback quality delivered back to Product and GTM on segment-specific needs.

Get to Know Klaviyo

We're Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we're developing to nurture personalised experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators — ambitious and collaborative teammates who stay focused on our north star: delighting our customers.

#LI-Hybrid 

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Team Overview:

The Amplify Engineering team builds internal tools, platforms, and AI-powered automation that help Klaviyos work more efficiently and at scale as the company grows. We partner across the organisation, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to solve real operational problems with practical, well-designed software.

Our work spans internal applications, 3rd-party integrations, interactive dashboards, CMS integrations, and robust AI systems and agents that automate repetitive tasks, surface the right information at the right time, and help teams make better decisions. We operate in tight feedback loops with our internal customers, shipping quickly, learning fast, and seeing the impact of our work immediately in how deals move faster, tickets resolve sooner, and launches go more smoothly.

This role is for builders and leaders who enjoy turning real-world pain points into reliable, scalable solutions. The work is highly visible and deeply impactful, shaping how thousands of Klaviyos get their work done every day through fast iteration, high ownership, and clear outcomes.

How You’ll Make an Impact:

The Amplify team builds the internal platforms, automation, and AI-driven systems that power how Klaviyos work every day. As an Engineering Manager, you will:

• Lead one or more engineering teams and help shape the technical direction for internal tools and platforms that improve efficiency, automation, and productivity.
• Lead a portfolio of internal systems supporting Sales, Marketing, Customer Service & Success, R&D, and Finance, including AI-powered workflows, internal web applications, data and event pipelines, third-party integrations, and support tooling.
• Balance technical leadership and people leadership, setting direction, modelling best practices, and enabling teams to deliver effectively through others.
• Partner closely with engineers, product managers, designers, and senior stakeholders to translate organisational challenges into scalable, high-quality software solutions.
• Learn and evolve Klaviyo’s end-to-end internal workflows, scaling platforms and processes to support the company’s next phase of growth.
• Foster a culture of collaboration, systems thinking, technical excellence, and curiosity around new technologies, including AI.
• Make a direct and visible impact on how thousands of Klaviyos get their work done every day.

Who You Are:

• You are passionate about building software for the long term, balancing technical quality, delivery pace, and business impact.
• BA or BS Degree in Computer Science, related field, or equivalent experience.
• You have 5+ years of hands-on software development experience building and operating highly available, full-stack SaaS products, with a solid understanding of modern web architectures and scalable, multi-tenant systems.
• You have 3+ years of experience as an engineering manager, leading high-performing teams that deliver complex, cross-team initiatives using an agile, iterative approach.
• You are a technically curious leader with hands-on experience using modern AI tools and workflows (e.g. OpenAI, Anthropic, Gemini, n8n) and an interest in helping teams apply them thoughtfully to improve productivity and outcomes.
• You are comfortable setting technical direction and standards, working with peers and senior leadership to evolve architecture, development practices, and shared engineering processes.
• You have experience owning work end-to-end – from design through delivery and deployment, including planning, estimation, and managing delivery risks.
• You are an effective cross-functional communicator, able to work closely with product, design, and business partners to align priorities and move work forward.
• You are a people-first leader who enjoys hiring, onboarding, mentoring, and developing engineers, creating an environment where individuals and teams can grow and do their best work.
• You enjoy leading teams that build internal platforms, tools, or systems that improve productivity, automation, and operational efficiency across an organisation.
• You like to question convention, continuously improve how work gets done, and thrive in small, autonomous teams that ship early and often in close partnership with their stakeholders.

Nice to have:

• Experience building internal tools, platforms, or automation for developers and/or non-technical teams.
• Hands-on experience in full-stack environments, including diagnosing and improving application performance.
• Strong practical experience using AI tools and patterns (e.g. APIs/SDKs, prompt and context design, automated or agentic workflows, RAG, and evaluation or monitoring).
• Experience working with cloud infrastructure (AWS preferred), including infrastructure-as-code and containerised environments (Terraform and Kubernetes). Familiarity with GCP or Azure is a plus.

30 / 60 / 90 / 6-12 Month Plan:

30 Days: Build context across the Amplify domain by learning the teams’ areas of ownership, architecture, and core workflows. Establish trust with engineers and partners while contributing to technical discussions and trade-off decisions.

60 Days: Assess team roadmaps and delivery practices, incorporating input from engineers and stakeholders. Align priorities with the technical direction and business goals you are helping to shape, and begin contributing to hiring and team growth.

90 Days: Improve how teams and stakeholders work by introducing or refining tools, processes, or architectural approaches. Provide technical leadership through reviews, guidance, and targeted hands-on contributions where helpful.

6-12 months: Be a trusted owner of your teams’ platforms and systems, known for delivering meaningful, scalable impact. Partner closely with product and design to drive adoption of Amplify systems and evolve them to support Klaviyo’s continued growth.

Technologies We Use:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. New hires join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• Typescript / React
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model

This role is based in Dublin, Ireland, and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

#indeedDUB

Dublin, Ireland (Hybrid: 3 days p/week in office)

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Dublin, Ireland (Hybrid: 3 days p/week in office)

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Dublin, Ireland (Hybrid: 3 days p/week in office)

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Dublin, Ireland (Hybrid: 3 days p/week in office)

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Team Overview:

The Amplify Engineering team builds internal tools, platforms, and AI-powered automation that help Klaviyos work more efficiently and at scale as the company grows. We partner across the organisation, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to solve real operational problems with practical, well-designed software.

Our work spans internal applications, 3rd-party integrations, interactive dashboards, CMS integrations, and robust AI systems and agents that automate repetitive tasks, surface the right information at the right time, and help teams make better decisions. We operate in tight feedback loops with our internal customers, shipping quickly, learning fast, and seeing the impact of our work immediately in how deals move faster, tickets resolve sooner, and launches go more smoothly.

This role is for software engineers who enjoy turning real-world problems into reliable, scalable solutions. The work is highly visible and has a direct impact on how thousands of Klaviyos get their work done every day.

How You’ll Make an Impact:

The Amplify team builds the internal platforms, automation, and AI-driven systems that power how Klaviyos work every day. As an AI Software Engineer II on Amplify, you will:

• Design, build, and maintain internal products and platforms, including internal web applications, APIs, data and event pipelines, and AI-powered workflows used daily by Sales, Marketing, Customer Service & Success, R&D, and Finance teams. You will own features and small-to-medium projects end to end, from design through deployment and iteration.
• Deliver project work with increasing autonomy and scope. You will break down problems into actionable pieces, refine requirements with your team, and collaborate to ship high-quality solutions that meet reliability and performance expectations.
• Work closely with internal customers to understand their workflows and constraints, and translate operational challenges into pragmatic, maintainable software and AI-enabled tools that improve productivity and reliability.
• Contribute to the technical and architectural evolution of Amplify’s systems by participating in design discussions, proposing improvements, and helping ensure our platforms remain scalable, observable, and reliable as usage grows.
• Take responsibility for the quality and operational health of the code you ship, including testing, deployment, monitoring, debugging issues in development and production, and participating in on-call rotations for the systems your team owns.
• Use modern AI tools as part of your day-to-day engineering workflow, including for coding, testing, documentation, and experimentation, and share learnings to help the team continuously improve how it works with AI.
• Help improve the developer experience and engineering practices on Amplify by contributing to tooling, CI/CD, automation, tests, and shared utilities that support consistent, high-quality delivery.
• Collaborate closely with Product, Design, Data, and operational partners, contributing to discovery, evaluating trade-offs, and ensuring the work you deliver is tied to clear success criteria and business outcomes.

Who You Are:

• You care about building software for the long term, balancing technical quality, delivery pace, and business impact.
• You have strong hands-on experience building and operating full-stack or backend-focused software systems, including SaaS products, platforms, or internal tools.
• You can take a well-defined feature or small-to-medium project from design through implementation, testing, rollout, and ongoing maintenance, seeking input when needed and moving work forward independently.
• You are comfortable questioning and refining requirements, working with product managers and stakeholders to clarify scope, identify edge cases, and propose pragmatic solutions.
• You have experience in at least one area of modern web engineering such as backend services, data pipelines, internal tools, integrations, or AI-enabled workflows, and understand how to build secure, scalable, and maintainable systems.
• You are comfortable using AI-powered tools to support your development workflow and are interested in continuing to grow your AI skills over time.
• You care about operational excellence and are comfortable debugging issues, improving tests, adding logging and metrics, and working within reliability goals.
• You are a clear communicator and collaborative teammate, contributing thoughtfully to technical discussions, writing clear tickets or lightweight design docs, and keeping others informed on progress and risks.
• You enjoy working in small, autonomous, agile teams, shipping iteratively, and partnering closely with product managers and other engineers to deliver meaningful outcomes.
• You are motivated to continuously improve how things work, whether that is tooling, workflows, architecture, or team practices.

Nice to Have:

• Experience building internal tools, platforms, or automations for developers and/or non-technical stakeholders, with a track record of improving reliability, productivity, or operational efficiency.
• Hands-on experience in full-stack environments, including diagnosing and improving application performance, database queries, and complex, multi-service workflows.
• Practical experience building or integrating AI-powered systems and agents; e.g., workflows using LLM APIs/SDKs, agentic or automated workflows, RAG pipelines, or evaluation/monitoring frameworks.
• Familiarity with cloud infrastructure (AWS preferred), infrastructure-as-code (Terraform), and containerized environments (Kubernetes), including how to design services that run reliably at scale in those environments.

Technologies We Use:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• Typescript / React
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model:

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Team Overview:

The Amplify Engineering team builds internal tools, platforms, and AI-powered automation that help Klaviyos work more efficiently and at scale as the company grows. We partner across the organisation, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to solve real operational problems with practical, well-designed software.

Our work spans internal applications, 3rd-party integrations, interactive dashboards, CMS integrations, and robust AI systems and agents that automate repetitive tasks, surface the right information at the right time, and help teams make better decisions. We operate in tight feedback loops with our internal customers, shipping quickly, learning fast, and seeing the impact of our work immediately in how deals move faster, tickets resolve sooner, and launches go more smoothly.

This role is for lead engineers who enjoy turning real-world problems into reliable, scalable solutions. The work is highly visible and has a direct impact on how thousands of Klaviyos get their work done every day.

How You’ll Make an Impact:

The Amplify team builds the internal platforms, automation, and AI-driven systems that power how Klaviyos work every day. As a Lead AI Software Engineer on Amplify, you will:

• Provide technical oversight and direction for a portfolio of Amplify systems, including internal web applications, APIs, data and event pipelines, and AI-powered workflows used daily by Sales, Marketing, Customer Service & Success, R&D, and Finance teams. You will help ensure they are reliable, scalable, secure, and straightforward to evolve.
• Formulate and drive a forward-looking technical vision for key Amplify domains in partnership with your Engineering Manager, Product, Data, and cross-functional stakeholders, aligning that vision with our AI-first strategy and the business outcomes we are accountable for.
• Lead the end to end lifecycle of complex, multi component projects and platforms that span multiple internal customers and engineering teams, from discovery and technical design through implementation, rollout, and long term ownership.
• Act as the primary technical interface between your areas of ownership in Amplify and the rest of engineering, helping clarify requirements, reduce technical ambiguity and risk, and ensure the team delivers roadmap and OKR commitments on time with the right quality bar.
• Take responsibility for the technical and architectural evolution of multiple significant domains within Amplify, anticipating scalability, reliability, security, and observability needs as usage grows and new use cases emerge.
• Define, refine, and uphold operational standards for the systems you and your team own, including SLOs, monitoring and alerting, incident response practices, and post incident learning that continually improves our operational excellence.
• Create, teach, and improve shared engineering processes, patterns, and internal platforms that make it easier for Amplify and other teams across Klaviyo to build high quality internal tools and AI-powered systems consistently.
• Use modern AI tools as part of your day-to-day engineering workflow and help the team adopt AI effectively, from design and coding through testing, documentation, and evaluation. You will help establish sensible guardrails, evaluation practices, and patterns for AI-first development.
• Work through influence and delegation to get work done, setting clear technical direction, breaking down projects into actionable workstreams, and enabling other engineers to deliver successfully.
• Mentor and coach other engineers across levels through design reviews, pairing, and thoughtful feedback. You will help grow future technical leaders, raise the technical bar for the team, and ensure knowledge is shared rather than concentrated.
• Collaborate closely with Product, Design, Data, and operational partners to define problems, shape trade offs, and agree on success metrics, ensuring Amplify’s work focuses on the highest value opportunities and that outcomes are clearly measured.
• Represent Amplify’s systems and strategy in broader engineering forums, contributing to architectural discussions, technical RFCs, and cross team initiatives, and helping ensure our internal platforms fit well into the wider Klaviyo ecosystem.

Who You Are:

• You care deeply about building software and platforms for the long term, balancing technical quality, delivery pace, and measurable business impact, and you are comfortable making and explaining trade offs at that intersection.
• You have strong hands on experience building and operating highly available, full stack or backend focused SaaS systems, and have been responsible for the health and evolution of multiple services or product areas, not just a single application.
• You have led delivery of business critical projects that span multiple engineers and months, including discovery, technical design, implementation, rollout, and ongoing maintenance. You are comfortable scrutinising requirements, reducing ambiguity, and setting technical direction for others.
• You have deep expertise in several areas of modern web engineering such as backend services, data pipelines, internal platforms, or AI enabled systems, and a strong understanding of scalable, multi-tenant architectures and the operational realities of running them in production.
• You regularly use AI powered tools in your development workflow and are interested in shaping how a team or organisation uses AI thoughtfully to improve engineering productivity, system capabilities, and internal customer experiences.
• You take ownership of operational excellence for the systems you and your team build, including performance, reliability, observability, and on-call participation where required. You are comfortable defining and maintaining SLOs and holding systems to them.
• You are effective at working through influence and delegation. You know when to keep a task for yourself and when to hand it to others, and you enjoy creating the clarity, patterns, and guardrails that let other engineers move quickly and safely.
• You enjoy questioning convention and continuously improving how things work, whether that is architecture, tooling, workflows, or team processes, and you are comfortable introducing change in a way that brings people along with you.
• You are a clear communicator and collaborative teammate, comfortable leading technical discussions, writing design docs or RFCs, and keeping stakeholders aligned from early discovery through delivery and follow up.
• You enjoy working in small, autonomous, agile teams, shipping incrementally, and partnering closely with product managers, data partners, and other engineers to deliver better outcomes for internal customers.

Nice to Have:

• Experience building internal tools, platforms, or automations for developers and or non technical stakeholders, with a track record of improving reliability, productivity, or operational efficiency across multiple teams.
• Experience providing technical leadership across several related systems or domains, including defining technical vision, setting design patterns, and aligning multiple teams on shared approaches.
• Practical experience building or integrating AI powered systems and agents such as workflows using LLM APIs or SDKs, agentic or automated workflows, retrieval augmented generation pipelines, or evaluation and monitoring frameworks for AI systems.
• Experience working with cloud infrastructure (AWS preferred), infrastructure as code (Terraform), and containerised environments (Kubernetes), and designing services that run reliably at scale in those environments.
• Experience partnering closely with customer service & support, go to market, or operations teams to understand complex workflows and build internal tools that drive measurable efficiency gains.

Technologies We Use:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• Typescript / React
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

#indeedDUB

Team Overview:

The Amplify Engineering team builds internal tools, platforms, and AI-powered automation that help Klaviyos work more efficiently and at scale as the company grows. We partner across the organisation, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to solve real operational problems with practical, well-designed software.

Our work spans internal applications, 3rd-party integrations, interactive dashboards, CMS integrations, and robust AI systems and agents that automate repetitive tasks, surface the right information at the right time, and help teams make better decisions. We operate in tight feedback loops with our internal customers, shipping quickly, learning fast, and seeing the impact of our work immediately in how deals move faster, tickets resolve sooner, and launches go more smoothly.

This role is for senior engineers who enjoy turning real-world problems into reliable, scalable solutions. The work is highly visible and has a direct impact on how thousands of Klaviyos get their work done every day.

How You’ll Make an Impact:

The Amplify team builds the internal platforms, automation, and AI-driven systems that power how Klaviyos work every day. As a Senior AI Software Engineer on Amplify, you will:

• Design, build, and own complex internal products and platforms, including internal web applications, APIs, data and event pipelines, and AI-powered workflows used daily by Sales, Marketing, Customer Service & Success, R&D, and Finance teams.
• Lead the end-to-end lifecycle of projects and features – from discovery and technical design through implementation, rollout, and long-term ownership.
• Partner closely with internal customers to understand their workflows and constraints, and translate real operational challenges into scalable, maintainable solutions that measurably improve productivity, quality, and reliability.
• Take ownership of the technical and architectural evolution of parts of the Amplify platform, anticipating scalability, reliability, and observability needs as usage grows.
• Define and maintain operational standards for the systems you own, including SLOs, monitoring, incident response, and follow-up on root-cause analysis.
• Use modern AI tools as part of your day-to-day engineering workflow (e.g. LLM-based tooling for design, coding, testing, and documentation), and help shape best practices for how the team applies AI responsibly and effectively.
• Contribute to shared patterns, tooling, and processes that make it easier for teams across Klaviyo to build high-quality internal tools and AI-powered systems consistently.
• Mentor and support other engineers through design reviews, pairing, and constructive feedback, leaving the codebase and systems better than you found them.
• Collaborate closely with Product, Design, Data, and operational partners to define requirements, trade-offs, and success metrics, ensuring Amplify’s work focuses on the highest-value problems.

Who You Are:

• You care deeply about building software for the long term, balancing technical quality, delivery pace, and business impact.
• You have strong hands-on experience building and operating highly available, full-stack SaaS systems, and are comfortable owning complex problems end to end.
• You’ve led the delivery of significant projects or features independently, including discovery, technical design, implementation, rollout, and ongoing maintenance, and you’re comfortable providing technical direction to others.
• You have deep expertise in one or more areas of modern web engineering (e.g. backend services, data pipelines, internal platforms, or AI-enabled systems) and a solid understanding of scalable, multi-tenant architectures.
• You regularly use AI-powered tools in your development workflow and are curious about applying AI thoughtfully to improve engineering productivity and system capabilities.
• You take ownership of operational excellence for the systems you build, including performance, reliability, observability, and on-call participation where required.
• You enjoy questioning convention and continuously improving how things work, whether that’s architecture, tooling, workflows, or team practices.
• You are a clear communicator and collaborative teammate, comfortable leading technical discussions, writing design docs or RFCs, and keeping stakeholders aligned.
• You enjoy working in small, autonomous, agile teams, shipping incrementally, and partnering closely with product managers and other engineers to deliver better outcomes.

Nice to have:

• Experience building internal tools, platforms, or automations for developers and/or non-technical stakeholders, with a track record of improving reliability, productivity, or operational efficiency.
• Hands-on experience in full-stack environments, including diagnosing and improving application performance, database queries, and complex, multi-service workflows.
• Practical experience building or integrating AI-powered systems and agents; e.g., workflows using LLM APIs/SDKs, agentic or automated workflows, RAG pipelines, or evaluation/monitoring frameworks.
• Experience working with cloud infrastructure (AWS preferred), infrastructure-as-code (Terraform), and containerised environments (Kubernetes), and designing services that run reliably at scale.

Technologies We Use:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• Typescript / React
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model:

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Onboarding Specialist (French Speaking)

About Klaviyo

At Klaviyo, we believe businesses should own their growth. Our platform powers smarter digital relationships by combining marketing automation, analytics, and customer data into one place. We’re building a future where every customer interaction feels personal—and we’re just getting started.

About the Role

Onboarding Specialists at Klaviyo play a critical role in setting our customers up for long-term success. As the first point of contact post-sale, you’ll guide new customers through their first 30–90 days, helping them successfully implement Klaviyo and achieve fast time-to-value.

You’ll act as a trusted advisor—combining project management, product expertise, and strategic thinking to drive product adoption, reduce friction, and build strong customer relationships from day one.

How You’ll Make a Difference

• Own a portfolio of new customers from post-sale through successful go-live, managing multiple onboarding journeys simultaneously
• Design and execute tailored onboarding plans aligned to each customer’s goals and use cases
• Guide customers through platform setup, configuration, testing, and early performance optimization
• Provide proactive, 1:1 support across both technical and non-technical topics (e.g., deliverability, campaign setup, integrations)
• Track onboarding progress, ensuring milestones are met and holding stakeholders accountable
• Monitor onboarding health metrics to identify risks early and take action to improve outcomes
• Partner cross-functionally with Sales, Support, and Product teams to resolve issues and deliver a seamless customer experience
• Act as a trusted advisor, helping customers build a strong foundation for their marketing and growth strategy

What You’ll Bring

• 2–3+ years of experience in Customer Success, Onboarding, or Implementation roles
• Fluent French and English
• Proven ability to manage multiple customer relationships and projects simultaneously
• Strong project management and organizational skills, with a track record of delivering on time
• Excellent communication skills, with the ability to explain complex concepts clearly and influence stakeholders
• Analytical mindset with strong problem-solving abilities
• Ability to manage customer expectations and navigate ambiguity in a fast-paced environment
• Experience working with CRM or customer success tools (e.g., Salesforce, Gainsight)
• Comfortable learning and adapting to new technologies quickly

Nice to Have

• Experience in marketing technology, email/SMS platforms, or e-commerce ecosystems
• Experience advising customers on marketing strategies or campaign execution
• Familiarity with data analysis, reporting, or performance optimization

AI & Innovation Mindset

At Klaviyo, we’re investing heavily in AI to enhance both our product and how we work. We’re looking for candidates who are curious and proactive about using AI tools to improve efficiency, scale their impact, and deliver better customer outcomes.

• Experience using AI tools (e.g., ChatGPT, automation tools, or similar) to streamline workflows, improve communication, or enhance customer delivery is highly valued
• Demonstrated ability (or strong interest) in adopting new technologies to work smarter and more efficiently
• A mindset focused on continuous improvement, experimentation, and leveraging AI to drive better results

#LI-Hybrid 

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Lead Software Engineer, Reliability (Dublin)

Team Overview

As a Lead Software Engineer, Reliability, you will set technical direction and lead reliability strategy for Klaviyo’s most critical platforms. You’ll ensure our systems are reliable, scalable, and sustainable while enabling rapid product development across the company.

We treat reliability as a core product feature. Our work spans security, infrastructure, and software engineering, requiring deep systems thinking and strong technical leadership. We build foundational services that must be extremely reliable, secure, and performant at global scale.

The SRE team’s charter is to design, build, and operate foundational infrastructure and services, define reliability standards, reduce operational toil through automation, and continuously improve systems based on production learnings. As a lead, your work will be highly visible and will directly influence how Klaviyo builds software and how customers experience our platform every day.

How you’ll make an impact

As a Lead Software Engineer, Reliability, you will provide technical leadership while remaining hands-on with the systems that underpin Klaviyo’s reliability and operational excellence. You will:

• Set the technical vision and long-term strategy for reliability, availability, and operational excellence across critical platforms
• Lead the design, implementation, and evolution of foundational, security-critical services with strong guarantees around availability, scalability, latency, and fault tolerance
• Drive adoption of SRE best practices across engineering teams, including SLIs, SLOs, error budgets, and reliability-based decision making
• Identify systemic reliability risks and architectural bottlenecks, and lead cross-team initiatives to address them with durable, preventative solutions
• Apply software engineering principles to automate infrastructure, eliminate operational toil, and improve system reliability at scale
• Own and continuously improve observability, alerting, and incident response practices to reduce mean time to detection and recovery
• Guide on-call strategy and operational processes to ensure sustainability, automation, and healthy operational load
• Perform and lead quantitative analysis around system behavior, capacity planning, scaling limits, and performance characteristics
• Partner closely with product, platform, and security leaders to influence system architecture early and ensure reliability is built in from the start
• Lead incident response for high-severity events, driving effective mitigation, communication, and follow-up
• Mentor senior and mid-level engineers, raising the bar for technical quality, operational maturity, and reliability culture across the organization
• Review and influence technical designs, platform APIs, operational runbooks, and system documentation at an organizational level
• You’ve already experimented with AI in work or personal projects, and you’re excited to dive in and learn fast. You’re hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient.

Who you are

You are a senior technical leader who combines deep systems expertise with strong judgment and influence. You:

• Are a cloud-native, platform-focused SRE who uses software to design and operate highly reliable production systems at scale
• Write and maintain production-quality code (e.g. Python, Go, or similar) to build internal platforms, automate operations, and improve system reliability
• Have led the design and operation of distributed, cloud-native systems and deeply understand failure modes such as partial outages, dependency failures, resource saturation, and cascading impact
• Have extensive experience operating containerized workloads and platforms (e.g. Kubernetes) in production, including deployment strategies, scaling behavior, and service networking
• Are comfortable owning on-call strategy and participating in escalation for complex production incidents
• Have designed and evolved observability platforms and alerting strategies that reflect real customer and service impact
• Apply SRE concepts such as SLIs, SLOs, error budgets, and burn-rate–based alerting to guide engineering priorities and trade-offs at a team or org level
• Have strong hands-on experience with infrastructure as code and declarative configuration (e.g. Terraform, Kubernetes manifests, policy-as-code)
• Have led capacity planning, load testing, and performance analysis efforts for large-scale distributed systems
• Drive high-quality post-incident reviews and ensure concrete, code-focused follow-up actions are delivered and sustained
• Are comfortable leading technical discussions, influencing architecture, and providing clear guidance across multiple teams

Nice to have

• Experience leading or supporting critical platforms or internal tooling
• Familiarity with identity, access management, secrets management, or policy enforcement systems
• Experience operating systems at scale in cloud environments (AWS preferred)
• Background in resilience testing, fault injection, or chaos engineering
• Strong understanding of algorithms and data structures as they apply to large-scale systems

Tech Stack

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack.

Core technologies include:

• Python / Django / FastAPI
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

About the Role

We’re looking for a Lead Payroll Analyst to join our Global Payroll team – a high-impact individual contributor role that combines deep payroll expertise with functional leadership. You’ll serve as the subject matter expert and day-to-day guide for our International Senior Payroll Specialist, while personally driving accuracy, compliance, and continuous improvement across our six-country EMEA and APAC payroll footprint.

This is an exciting opportunity for an experienced payroll professional ready to step into a lead role – influencing how payroll operates globally, championing automation and AI-driven improvements, and partnering closely with People, Finance, and Tech teams to build a best-in-class function.

Job location: London, UK (3 days p/week in-office)

Full-time permanent role

What You’ll Own

Functional Leadership

• Act as functional lead for international payroll operations across six countries: UK, Ireland, France, Germany, Singapore, and Australia
• Provide day-to-day guidance, quality review, and mentorship to the International Senior Payroll Specialist
• Serve as the primary escalation point for complex payroll queries, compliance issues, and vendor matters
• Partner with the Global Payroll Manager to set team priorities, improve workflows, and ensure consistent delivery across all regions

Global Payroll Execution

• Own end-to-end payroll processing and sign-off for UK and Ireland, ensuring accuracy and on-time delivery every cycle
• Oversee and review payroll delivery for France, Germany, Singapore, and Australia through CloudPay and in-country vendors
• Manage and validate payroll inputs in Workday, ensuring data integrity from hire to pay
• Ensure full compliance with local payroll legislation, tax law, and statutory requirements across all jurisdictions

Finance & Compliance Partnership

• Lead payroll reconciliations, variance analysis, and internal controls across all pay cycles
• Own month-end and year-end payroll close activities with accounting partners.
• Support internal and external audits, providing documentation and analysis as needed

Cross-Functional Collaboration

• Partner closely with People Operations, HRBPs, Benefits, Finance, and People Tech to deliver a seamless employee payroll experience
• Act as a subject matter expert in cross-functional projects, including system enhancements, benefits integration, and global mobility scenarios

Innovation & Process Improvement

• Identify and lead initiatives to streamline, automate, and modernize payroll processes
• Champion the use of AI tools for data validation, anomaly detection, and payroll reporting insights
• Document processes, build scalable playbooks, and drive standardization across the payroll team

What We’re Looking For

You’re an experienced payroll professional who brings technical depth, a collaborative mindset, and a natural instinct for leading others without needing a formal management title.

Required Experience

• 8+ years of payroll experience, with at least 3 years in a multi-country or global payroll environment
• Deep expertise in UK and/or Ireland payroll (essential) – you know the legislation, the nuances, and the edge cases
• Hands-on experience with payroll in at least two of the following: France, Germany, Singapore, Australia
• Experience providing guidance, review, or informal leadership to other payroll team members
• Proven track record of managing complex reconciliations, payroll controls, and compliance reporting

Systems & Tools

• Proficiency with Workday HCM and/or payroll input workflows
• Experience with CloudPay or a comparable global payroll aggregator/vendor platform
• Comfort with Excel or Google Sheets for data analysis and payroll reconciliation
• Exposure to or active interest in automation tools and AI applications within payroll or finance operations

Skills & Attributes

• High attention to detail with the ability to manage competing deadlines across time zones
• Strong analytical and problem-solving skills – you spot issues before they become problems
• Excellent communication skills; able to translate complex payroll topics for non-payroll stakeholders
• Proactive, self-directed work style with a continuous improvement mindset

About the Role

We’re looking for a Lead Payroll Analyst to join our Global Payroll team – a high-impact individual contributor role that combines deep payroll expertise with functional leadership. You’ll serve as the subject matter expert and day-to-day guide for our International Senior Payroll Specialist, while personally driving accuracy, compliance, and continuous improvement across our six-country EMEA and APAC payroll footprint.

This is an exciting opportunity for an experienced payroll professional ready to step into a lead role – influencing how payroll operates globally, championing automation and AI-driven improvements, and partnering closely with People, Finance, and Tech teams to build a best-in-class function.

Job location: Dublin, IE (3 days p/week in-office)

Full-time permanent role

What You’ll Own

Functional Leadership

• Act as functional lead for international payroll operations across six countries: UK, Ireland, France, Germany, Singapore, and Australia
• Provide day-to-day guidance, quality review, and mentorship to the International Senior Payroll Specialist
• Serve as the primary escalation point for complex payroll queries, compliance issues, and vendor matters
• Partner with the Global Payroll Manager to set team priorities, improve workflows, and ensure consistent delivery across all regions

Global Payroll Execution

• Own end-to-end payroll processing and sign-off for UK and Ireland, ensuring accuracy and on-time delivery every cycle
• Oversee and review payroll delivery for France, Germany, Singapore, and Australia through CloudPay and in-country vendors
• Manage and validate payroll inputs in Workday, ensuring data integrity from hire to pay
• Ensure full compliance with local payroll legislation, tax law, and statutory requirements across all jurisdictions

Finance & Compliance Partnership

• Lead payroll reconciliations, variance analysis, and internal controls across all pay cycles
• Own month-end and year-end payroll close activities with accounting partners.
• Support internal and external audits, providing documentation and analysis as needed

Cross-Functional Collaboration

• Partner closely with People Operations, HRBPs, Benefits, Finance, and People Tech to deliver a seamless employee payroll experience
• Act as a subject matter expert in cross-functional projects, including system enhancements, benefits integration, and global mobility scenarios

Innovation & Process Improvement

• Identify and lead initiatives to streamline, automate, and modernize payroll processes
• Champion the use of AI tools for data validation, anomaly detection, and payroll reporting insights
• Document processes, build scalable playbooks, and drive standardization across the payroll team

What We’re Looking For

You’re an experienced payroll professional who brings technical depth, a collaborative mindset, and a natural instinct for leading others without needing a formal management title.

Required Experience

• 8+ years of payroll experience, with at least 3 years in a multi-country or global payroll environment
• Deep expertise in UK and/or Ireland payroll (essential) – you know the legislation, the nuances, and the edge cases
• Hands-on experience with payroll in at least two of the following: France, Germany, Singapore, Australia
• Experience providing guidance, review, or informal leadership to other payroll team members
• Proven track record of managing complex reconciliations, payroll controls, and compliance reporting

Systems & Tools

• Proficiency with Workday HCM and/or payroll input workflows
• Experience with CloudPay or a comparable global payroll aggregator/vendor platform
• Comfort with Excel or Google Sheets for data analysis and payroll reconciliation
• Exposure to or active interest in automation tools and AI applications within payroll or finance operations

Skills & Attributes

• High attention to detail with the ability to manage competing deadlines across time zones
• Strong analytical and problem-solving skills – you spot issues before they become problems
• Excellent communication skills; able to translate complex payroll topics for non-payroll stakeholders
• Proactive, self-directed work style with a continuous improvement mindset

About the Role

We’re looking for a Senior Payroll Specialist to join our Global Payroll team, supporting payroll across EMEA.

This role has primary responsibility for UK & Ireland payroll, along with coordination and review of payroll across France, Germany, Singapore, and Australia through established vendors.

In addition to delivering accurate and compliant payroll, you’ll support ongoing process improvements and automation initiatives, including the use of AI tools, while working within core payroll systems such as Workday and CloudPay.

What You’ll Do

• Own end-to-end payroll processing for UK & Ireland
• Review and coordinate payroll delivery for:
• France
• Germany
• Singapore
• Australia
• Partner with CloudPay and in-country vendors to ensure payroll is accurate, compliant, and delivered on time
• Use Workday to manage employee data and payroll inputs
• Ensure compliance with all local payroll legislation and tax requirements
• Partner cross-functionally with:
• People Operations & HRBPs
• Finance (reconciliations, payroll accounting, reporting)
• Benefits
• People Tech
• Perform payroll reconciliations, controls, and audit support
• Support month-end and year-end payroll activities
• Identify and drive process improvements, including:
• Streamlining and automating manual processes
• Leveraging AI tools for data validation, anomaly detection, and reporting insights

What We’re Looking For

• 5+ years of payroll experience
• Strong expertise in:
• UK & Ireland payroll (essential)
•  
• Experience working in a multi-country payroll environment
• Experience with:
• Workday (HCM and/or payroll inputs)
• CloudPay or similar global payroll provider
• Strong understanding of:
• Payroll compliance and statutory requirements
• Payroll reconciliations and reporting
• Exposure to or interest in automation and AI within payroll or finance operations
• High attention to detail with the ability to manage multiple deadlines
• Strong communication skills and ability to work across teams and regions

Nice to Have

• Hands-on experience supporting payroll in at least one of the following:
• France
• Germany
• Singapore
• Exposure to Australia payroll
• Experience with payroll transformation or system implementations

Why Join

• Opportunity to support a global payroll footprint
• Exposure to multiple countries and payroll frameworks
• Work with established systems (Workday, CloudPay)
• Contribute to modernizing payroll through automation and AI

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Klaviyo powers growth for businesses by helping them reach customers on the right channel at the right moment. As Director of Engineering, Messaging Infrastructure, you will lead the teams that build and operate the core, multi-tenant platform that sends and receives messages at massive scale across email, SMS, mobile push, WhatsApp, and future channels. Your organization will own the services, pipelines, and integrations that ensure messages are delivered fast, reliably, and compliantly—so product teams can innovate confidently and our customers can trust us with their most valuable communications. Success in this role means higher deliverability, lower latency and cost-per-message, stronger privacy & compliance posture, and faster developer velocity across Klaviyo.

How You’ll Make a Difference

• Own the messaging platform end to end (ingestion, orchestration, templating/rendering, scheduling, routing, send, feedback loops, analytics)—with clear SLOs, scalable multi-region architecture, and a measurable reliability posture (e.g., error budgets, MTTR, incident rate).
• Increase deliverability & throughput by advancing our MTA/SMS provider strategies, queueing and rate-limiting, channel-specific features (e.g., pre-flight checks, warm-up), and feedback processing (bounces, complaints, carrier responses).
• Harden compliance & safety in partnership with Legal/Privacy (e.g., consent/state management, opt-out, quiet hours, TCPA/CAN‑SPAM/CTIA/GDPR-aware workflows) to protect customers and their end-users.
• Accelerate developer velocity for channel teams via clear APIs, SDKs, contracts, documentation, and paved-road tooling (test environments, canaries, shadow traffic, feature flags, progressive delivery).
• Deliver business impact by tying platform choices to measurable outcomes (deliverability %, send latency, success rate, $/MM, cycle time), setting an annual platform strategy and quarterly commitments.
• Build and scale a high-performing org of managers and senior ICs; raise the talent bar through crisp expectations, transparent feedback, and career growth paths aligned to Klaviyo’s standards.
• Transform workflows with AI. Put AI at the center of how the org plans, operates, and learns—using it to streamline incident response, speed root-cause analysis, optimize capacity, and improve developer productivity.

What You’ll Do

• Set vision & roadmap: Define a 12–18 month technical strategy for Messaging Infrastructure; translate it into quarterly, outcomes-based plans with clear tradeoffs and risks.
• Architect for scale & resiliency: Guide design for high-throughput streaming, durable queues, idempotent processing, multi-tenant isolation, and multi-region failover; champion observability-first development.
• Operational excellence: Establish SLOs and on-call practices; lead major incident reviews with a blameless, action-oriented posture; drive cost efficiency and capacity planning.
• Partner deeply: Work with Product, Security, Data, and GTM teams to align on customer requirements, roadmaps, and launch readiness; represent the platform in exec forums.
• Elevate engineering quality: Institutionalize design reviews, threat modeling, test strategies, and change management that reduce cycle time while protecting reliability.
• Talent & culture: Hire exceptional people, develop managers, and model urgency, ownership, and accountability—rewarding impact and raising the bar on what “good” looks like at scale.
• Continuously experiment with AI—testing tools, sharing learning, and championing new applications that responsibly accelerate org workflows and elevate quality.

Who You Are

• Platform-minded leader with a track record building/operating large-scale, low-latency distributed systems (messaging, streaming, or analogous high-throughput platforms). You’re hands-on enough to dig into architecture, but you lead through clarity, metrics, and great managers.
• Owner of outcomes. You connect engineering choices to business results—deliverability, latency, reliability, developer velocity, and cost—and hold teams accountable for moving those numbers.
• High-intensity, high-urgency operator who thrives in ambiguity, makes crisp tradeoffs, and ships ambitious, reliable systems on a predictable cadence.
• Inclusive people leader experienced in growing managers and senior ICs, building healthy on-call cultures, and scaling organizations across hubs.
• Strong partner & communicator who can translate complex systems into simple narratives for executives, customers, and cross-functional peers.
• AI-fluent builder. You’ve already experimented with AI in work or personal projects and are excited to learn fast and responsibly integrate AI into everyday workflows.

Nice to Haves (Helpful, not required)

• Domain experience with email MTAs, SMS aggregators/carrier networks, push services, or deliverability tooling.
• Prior leadership of multi-region or hybrid-cloud systems, and experience setting SLOs/error budgets at platform boundaries.
• Background in privacy-aware systems (e.g., consent orchestration, data residency, data retention/TTL strategies).
• Experience improving developer experience (APIs/SDKs, golden paths, internal platforms) for 10+ product teams.

How We Work

• Hub-based, hybrid collaboration; on-call coverage appropriate to mission-critical systems.
• Interview process emphasizes technical depth, leadership behaviors (ownership, urgency, accountability), and measurable impact.
• We value candidates who are rigorous, curious, and driven to create leverage for every Klaviyo developer and customer.

#indeedDUB

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Partner Account Manager, French-Proficiency
Job location: Dublin, IE (3 days p/week in-office)
Full-time permanent role

At Klaviyo, Partner Account Managers (PAM) pride themselves on being marketing and product experts. As our SMB Partner Account Manager for EMEA (specifically for the French region) you will be responsible for building a long term, deep, and mutually-beneficial relationship with Klaviyo’s SMB marketing agencies and systems integrator partners. You will leverage strong consultative skills to understand your partners’ business model and growth strategy so that you can identify ways Klaviyo can help them (and their clients) grow.

You are responsible for articulating the value of Klaviyo’s software, differentiating Klaviyo from other solutions, managing business development referrals (and co-selling opportunities) to/ from your partners, and coaching your partners on how to grow their business, including their profitability with Klaviyo. 

How you'll make an impact

• Manage relationships: Nurture a portfolio of 40 SMB partner relationships, serving as a trusted advisor
• Drive partner growth: develop and execute long-term strategies to help partners achieve their growth objectives with klaviyo
• Lead referrals and co-selling: build and manage a lead referral pipeline between klaviyo and your partners, identifying co-selling opportunities to drive mutual success
• Showcase klaviyo expertise: articulate the value of Klaviyo’s platform, differentiating it from competitors and demonstrating how it can improve partners’ profitability and business outcomes
• Operate with revenue goals: be comfortable operating with revenue-focused objectives, ensuring partners contribute meaningfully to klaviyo’s growth
• Collaborate cross-functionally: work closely with marketing, sales, and product teams to educate partners on platform enhancements and support their integration into their offerings
• Travel: spend up to 25% of your time traveling across the uk and europe to build relationships and attend events

Who You Are

Experience:

• 2+ years in Partnerships, Account Executive, Channel, Account Management, or Commercial Customer Success roles within SaaS (preferably in MarTech or working with eCommerce-focused accounts)
• Proven ability to manage multiple accounts and relationships in a high-velocity, high-volume environment with a focus on driving partner productivity

Languages:

• Fluent in English and French (written and verbal)
• Business-fluent Spanish or Italian is a bonus!

Skills:

• Exceptional influencing and relationship-building abilities across all levels of seniority, with the capacity to navigate complex organizational structures
• Adept at identifying and aligning partner goals with Klaviyo’s platform capabilities
• Already experimented with AI in work or personal projects (essential). You’re hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient

Mindset:

• Collaborative, strategic thinker with a creative approach to problem-solving
• Passionate about building strong partnerships and delivering value

Other Requirements:

• Willing and able to travel across the Ireland/ UK and Europe as needed

#LI-hybrid #LI-JW1

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Software Engineer II, Reliability (Dublin)

Team Overview:

As a Software Engineer II, Reliability, you will help ensure Klaviyo’s critical platforms are reliable, scalable, and sustainable while enabling rapid product development.

We treat reliability as a core product feature and use software engineering to solve complex systems and operational challenges. Our work spans infrastructure, security, and software engineering, and focuses on building and operating systems that are reliable, secure, and performant at scale.

The SRE team’s charter is to build and operate foundational services and infrastructure, reduce operational toil through automation, and continuously improve systems based on real production learnings. Your work will directly impact how Klaviyo engineers build software and how customers experience our platform every day.

How You’ll Make an Impact:

As a Software Engineer II, Reliability, you will contribute to the reliability and operational excellence of Klaviyo’s platforms by working on well-scoped projects and owning services with support from senior engineers. You will:

• Build, operate, and improve production systems with a focus on reliability, scalability, and performance
• Apply software engineering principles to automate operational tasks and reduce manual toil
• Contribute to the design and implementation of systems using established SRE best practices
• Help define and measure SLIs and SLOs for services you support
• Improve observability through metrics, dashboards, logging, and tracing
• Participate in on-call rotations and respond to production incidents with guidance and support
• Assist with incident investigation and contribute to post-incident reviews and follow-up actions
• Perform basic analysis around system behavior, capacity usage, and scaling characteristics
• Identify reliability issues or operational pain points and work with teammates to address them
• Collaborate with product, platform, and security engineers to ship reliable systems
• Write and maintain clear operational runbooks and system documentation

Who You Are:

You are an early-to-mid career SRE who is comfortable operating production systems and eager to deepen your expertise in reliability engineering. You:

• Have experience operating cloud-native production systems and services
• Write production-quality code (e.g. Python, Go, or similar) to automate operations and improve reliability
• Understand common failure modes in distributed systems, such as dependency failures, resource exhaustion, and partial outages
• Have experience working with containerized workloads and platforms (e.g. Kubernetes) in production environments
• Are comfortable participating in on-call rotations and diagnosing straightforward production issues
• Have experience using observability tools and responding to alerts
• Are familiar with SRE concepts such as SLIs, SLOs, and error budgets, and are learning how to apply them in practice
• Have hands-on experience with infrastructure as code or declarative configuration (e.g. Terraform, Kubernetes manifests)
• Can follow incident response processes and contribute meaningfully during outages
• Are comfortable receiving feedback, learning from incidents, and improving your systems over time
• You’ve already experimented with AI in work or personal projects, and you’re excited to dive in and learn fast. You’re hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient.

Nice to Have:

• Experience supporting security-sensitive systems or internal platforms
• Familiarity with AWS or other cloud providers
• Exposure to messaging or asynchronous systems (e.g. Kafka, RabbitMQ, Celery)
• Interest in performance testing, capacity planning, or resilience work
• Practical experience with algorithms and data structures

Tech Stack:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack.

Core technologies include:

• Python / Django / FastAPI
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model:

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Team Overview:

The Infrastructure Security team makes it simple and easy for engineers to make secure choices while developing world class software at high speed. Security is built in by default, seamless, and effortless, making engineers’ lives better and Klaviyo more secure.

Our work spans security, infrastructure, and software development, requiring us to understand systems and engineering.  We build complex, foundational solutions that must be extremely reliable, secure, and performant at global scale.

This role is for senior engineers who enjoy turning real-world problems into reliable, scalable solutions. The work is highly visible and has a direct impact on how hundreds of Klaviyos get their work done every day, and 100’s of thousands of customers use our products with confidence.

How you’ll make an impact:

The Infrastructure Security team builds the internal platforms, systems, and services that serve as the foundational building blocks for how our engineers build securely every day. As a Senior Software Engineer on Infrastructure Security, you will:

• Ship foundational security services to enable Klaviyo engineering to move faster with confidence
• Design and develop systems and processes that enable highly available & scalable systems
• Design, build and deliver software to dramatically improve the availability, scalability, latency, and efficiency of Klaviyo’s services
• Achieve break-throughs in systems throughput by identifying and eliminating bottlenecks
• Leverage technology such as Python, Golang, AWS, Django, Kubernetes, Bash, Terraform, MySQL, Redis, Clickhouse, Iceberg, DataLake, Istio, Postgresql, and more to advance Klaviyo’s platform
• Champion best practices by actively collaborating with other teams in a culture that values whiteboarding and technical design review
• Contribute to the company as a subject matter expert in multiple areas, constantly pushing yourself to be a better engineer and to level up all of your peers within your team and within Klaviyo.
• Mentor and pair with other Klaviyo engineers to build better software by focusing on performance, self-healing system, configuration as code; defensive programming, application security, etc.
• Participate in periodic on call duties with a focus on solving issues when they are discovered, preventing recurrences and minimizing alert fatigue 
• Prototype and advocate for architectural improvements to achieve breakthrough results in Klaviyo systems’ operational scalability and reliability
• Work hand-in-hand with product-facing engineers to ship impactful code
• Perform quantitative investigation to understand and scale Klaviyo systems and manage the cross-functional effort to resolve scalability issues
• Produce and advocate for preventative, upstream solutions with internal stakeholders and external vendors and dependencies
• Confidently make informed, data-driven choices in a fast paced environment with competing priorities

Who you are:

• You care deeply about building software for the long term, balancing technical quality, delivery pace, and business impact.
• You have strong hands on experience with Linux operating systems and computer networking
• You’re comfortable and experienced writing code in a programming language such as Python, Ruby, Go, etc.
• You have deep experience with cloud infrastructure, operating in a high scale environment
• You have strong hands-on experience building and operating highly available systems, and are comfortable owning complex problems end to end.
• You’ve led the delivery of significant projects or features independently, including discovery, technical design, implementation, rollout, and ongoing maintenance, and you’re comfortable providing technical direction to others.
• You have deep expertise in one or more areas of modern web engineering (e.g. backend services, data pipelines, internal platforms, or AI-enabled systems) and a solid understanding of scalable, multi-tenant architectures.
• You regularly use AI-powered tools in your development workflow and are curious about applying AI thoughtfully to improve engineering productivity and system capabilities.
• You take ownership of operational excellence for the systems you build, including performance, reliability, observability, and on-call participation where required.
• You enjoy questioning convention and continuously improving how things work, whether that’s architecture, tooling, workflows, or team practices.
• You are a clear communicator and collaborative teammate, comfortable leading technical discussions, writing design docs or RFCs, and keeping stakeholders aligned.
• You enjoy working in small, autonomous, agile teams, shipping incrementally, and partnering closely with product managers and other engineers to deliver better outcomes.

Nice to have:

• Experience building security tooling, working with security infrastructure systems like Vault, AWS IAM, WAFs, and more
• Hands-on experience including diagnosing and improving systems performance, database queries, and complex, multi-service workflows.

Tech Stack:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Senior Software Engineer, Reliability (Dublin)

Team Overview:

As a Senior Software Engineer, Reliability, you’ll ensure Klaviyo’s critical platforms are reliable, scalable, and sustainable while enabling rapid product development. We treat reliability as a core product feature and use software engineering to solve complex systems and operational challenges.

Our work spans security, infrastructure, and software development, requiring us to understand systems and engineering.  We build complex, foundational solutions that must be extremely reliable, secure, and performant at global scale.

Our charter is to build and operate foundational services and infrastructure, define clear reliability objectives, reduce operational toil through automation, and continuously improve systems based on real production learnings. The work is highly visible and directly impacts how Klaviyos build software and how customers experience Klaviyo every day.

How You’ll Make an Impact:

As a Senior Software Engineer, Reliability, you will build and operate the platforms, systems, and services that underpin Klaviyo’s reliability and operational excellence. You will:

• Build and operate foundational, security-critical services with a strong emphasis on availability, scalability, latency, and fault tolerance
• Apply software engineering principles to automate infrastructure, reduce operational toil, and improve system reliability at scale
• Design, implement, and evolve systems using SRE best practices
• Define and refine SLIs, SLOs, and error budgets to guide engineering decisions
• Improve observability, alerting, and incident response to reduce mean time to detection and recovery
• Participate in on-call rotations with a focus on sustainable operations and automatic remediations 
• Perform quantitative analysis to understand system behavior, capacity constraints, and scaling limits
• Identify systemic risks and reliability bottlenecks and drive long-term, preventative solutions
• Collaborate closely with product, platform, and security engineers to influence architecture early and ship reliable systems
• Mentor and pair with other engineers, helping raise the bar for reliability, operational maturity, and engineering excellence

Who You Are:

You are a cloud-native, platform-focused SRE who uses software to build and operate reliable production systems at scale.

• You write and maintain production-quality code (e.g. Python, Go, or similar) to build internal platforms, automate operations, and improve system reliability
• You have built, deployed, and operated distributed, cloud-native systems and understand failure modes such as partial outages, dependency failures, resource saturation, and cascading impact
• You have experience operating containerized workloads and platforms (e.g. Kubernetes) in production, including deployment strategies, scaling behavior, and service networking
• You are comfortable participating in on-call rotations and diagnosing production issues
• You have designed and operated observability systems and know how to build actionable alerts that reflect real user and service impact
• You apply SRE concepts such as SLIs, SLOs, error budgets, and burn-rate–based alerting to guide engineering decisions and operational response
• You have hands-on experience with infrastructure as code and declarative configuration (e.g. Terraform, Kubernetes manifests, policy-as-code)
• You have performed capacity planning, load testing, and performance analysis for distributed services and platforms
• You routinely contribute to post-incident reviews and drive concrete, code-focused follow-up actions that prevent recurrence
• You are comfortable reviewing and contributing to technical designs, platform APIs, operational runbooks, and system documentation
• You’ve already experimented with AI in work or personal projects, and you’re excited to dive in and learn fast. You’re hungry to responsibly explore new AI tools and workflows, finding ways to make your work smarter and more efficient.

Nice to Have:

• Experience supporting security-critical platforms or building internal security tooling
• Familiarity with identity, access management, secrets management, or policy enforcement systems
• Experience operating systems at scale in cloud environments (AWS preferred)
• Background in resilience testing, fault injection, or chaos engineering
• A strong comprehension of algorithms and data structures at scale

Tech Stack:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack.

Core technologies include:

• Python / Django / FastAPI
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model:

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Dublin, Ireland (3 days p/week in-office)

As the first point of contact in the sales cycle, you are on the front lines. We consider Outbound Business Development Reps essential to the success of our business as your contribution to the sales and marketing feedback loop significantly influences our go-to-market strategy. We pride ourselves on accountability, effort and working collaboratively to create positive outcomes. We understand that these values are essential to meeting goals and exceeding expectations.

How You Will Make A Difference:

• Identify high potential companies who can benefit from Klaviyo’s solution
• Partner closely with experienced Mid-Enterprise Account Executives to come up with and execute on effective prospecting strategies to generate opportunities
• Develop, test and iterate messaging across multiple channels, industries and personas 
• Contribute learnings and best practices to the Outbound process and team members to support  the success of your peers 
• Reflect Klaviyo’s values of accountability and effort

Who You Are:

• Have 1+ years of work experience, preferably in an inbound or outbound BDR role at another marketing technology company
• Fluent French & English (written and verbal) essential
• Continually seek improvement and are rigorous in your pursuit of it
• Are excited, motivated, and inspired by exceeding goals
• Are thoughtful, engaging, energetic, and self-aware
• Have experience working in a fast-paced environment
• Focus on details, are a self-starter, and are relentless but professional
• Have excellent written/verbal communication skills

#LI-Hybrid 

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Team Overview

The Infrastructure Security team makes it simple and easy for engineers to make secure choices while developing world-class software at high speed. Security is built in by default—seamless and effortless—making engineers’ lives better and Klaviyo more secure.

Our work sits at the intersection of security, infrastructure, and software engineering. We build cloud-native platforms and services that are reliable, secure, and performant at global scale, forming the foundation that Klaviyo engineers rely on every day.

This role is for engineers who enjoy building modern distributed systems, care about security and reliability, and want to have real impact across a large engineering organization.

How you’ll make an impact

As a Software Engineer on the Infrastructure Security team, you will build and operate the systems that help Klaviyo engineers ship secure software with confidence. You will:

• Design, build, and maintain cloud-native security services used across Klaviyo
• Own meaningful components and services end to end, from implementation through production operation
• Improve the availability, scalability, latency, and efficiency of infrastructure security systems
• Collaborate with senior engineers on system design and architecture, contributing ideas and technical solutions
• Identify performance, reliability, and security issues in distributed systems and drive improvements
• Work extensively with technologies such as Python, Golang, AWS, Kubernetes, Terraform, and modern data stores
• Participate actively in design reviews, code reviews, and whiteboarding sessions
• Contribute to operational excellence through monitoring, alerting, and incident response
• Participate in an on-call rotation with a focus on learning, prevention, and reducing operational toil
• Build tooling, automation, and documentation that improve developer experience and security posture
• Partner with product-facing and platform engineers to ship impactful, secure solutions

Who you are

• You have solid experience building and operating cloud-native, distributed systems in production
• You are comfortable writing production-quality code in a language such as Python or Go
• You have hands-on experience with AWS (or a similar cloud provider) and understand managed services, networking, and IAM concepts
• You have experience working with containers and orchestration platforms such as Kubernetes
• You are comfortable owning services and features independently, while knowing when to ask for feedback or support
• You understand the fundamentals of scalable, multi-tenant architectures and secure system design
• You care about reliability, performance, observability, and security—not just shipping features
• You are comfortable participating in on-call and responding to production issues
• You communicate clearly, collaborate well, and enjoy working through technical problems as a team
• You regularly use modern developer tooling, including AI-powered tools, to improve productivity and code quality

Nice to have

• Experience building or integrating security-focused systems (e.g. secrets management, IAM, authn/z, policy enforcement)
• Familiarity with service meshes, API gateways, or zero-trust architectures
• Experience improving performance in distributed systems or debugging complex multi-service workflows

Tech Stack

Klaviyo’s platform is primarily built with Python and React and runs on AWS. Engineers join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model

This role is based in Dublin, Ireland and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

Team Overview:

The Amplify Engineering team builds internal tools, platforms, and AI-powered automation that help Klaviyos work more efficiently and at scale as the company grows. We partner across the organisation, including Sales, Marketing, Engineering & Product, Customer Service & Success, and Finance, to solve real operational problems with practical, well-designed software.

Our work spans internal applications, 3rd-party integrations, interactive dashboards, CMS integrations, and robust AI systems and agents that automate repetitive tasks, surface the right information at the right time, and help teams make better decisions. We operate in tight feedback loops with our internal customers, shipping quickly, learning fast, and seeing the impact of our work immediately in how deals move faster, tickets resolve sooner, and launches go more smoothly.

This role is for builders and leaders who enjoy turning real-world pain points into reliable, scalable solutions. The work is highly visible and deeply impactful, shaping how thousands of Klaviyos get their work done every day through fast iteration, high ownership, and clear outcomes.

How You’ll Make an Impact:

The Amplify team builds the internal platforms, automation, and AI-driven systems that power how Klaviyos work every day. As an Engineering Manager, you will:

• Lead one or more engineering teams and help shape the technical direction for internal tools and platforms that improve efficiency, automation, and productivity.
• Lead a portfolio of internal systems supporting Sales, Marketing, Customer Service & Success, R&D, and Finance, including AI-powered workflows, internal web applications, data and event pipelines, third-party integrations, and support tooling.
• Balance technical leadership and people leadership, setting direction, modelling best practices, and enabling teams to deliver effectively through others.
• Partner closely with engineers, product managers, designers, and senior stakeholders to translate organisational challenges into scalable, high-quality software solutions.
• Learn and evolve Klaviyo’s end-to-end internal workflows, scaling platforms and processes to support the company’s next phase of growth.
• Foster a culture of collaboration, systems thinking, technical excellence, and curiosity around new technologies, including AI.
• Make a direct and visible impact on how thousands of Klaviyos get their work done every day.

Who You Are:

• You are passionate about building software for the long term, balancing technical quality, delivery pace, and business impact.
• BA or BS Degree in Computer Science, related field, or equivalent experience.
• You have 5+ years of hands-on software development experience building and operating highly available, full-stack SaaS products, with a solid understanding of modern web architectures and scalable, multi-tenant systems.
• You have 3+ years of experience as an engineering manager, leading high-performing teams that deliver complex, cross-team initiatives using an agile, iterative approach.
• You are a technically curious leader with hands-on experience using modern AI tools and workflows (e.g. OpenAI, Anthropic, Gemini, n8n) and an interest in helping teams apply them thoughtfully to improve productivity and outcomes.
• You are comfortable setting technical direction and standards, working with peers and senior leadership to evolve architecture, development practices, and shared engineering processes.
• You have experience owning work end-to-end – from design through delivery and deployment, including planning, estimation, and managing delivery risks.
• You are an effective cross-functional communicator, able to work closely with product, design, and business partners to align priorities and move work forward.
• You are a people-first leader who enjoys hiring, onboarding, mentoring, and developing engineers, creating an environment where individuals and teams can grow and do their best work.
• You enjoy leading teams that build internal platforms, tools, or systems that improve productivity, automation, and operational efficiency across an organisation.
• You like to question convention, continuously improve how work gets done, and thrive in small, autonomous teams that ship early and often in close partnership with their stakeholders.

Nice to have:

• Experience building internal tools, platforms, or automation for developers and/or non-technical teams.
• Hands-on experience in full-stack environments, including diagnosing and improving application performance.
• Strong practical experience using AI tools and patterns (e.g. APIs/SDKs, prompt and context design, automated or agentic workflows, RAG, and evaluation or monitoring).
• Experience working with cloud infrastructure (AWS preferred), including infrastructure-as-code and containerised environments (Terraform and Kubernetes). Familiarity with GCP or Azure is a plus.

30 / 60 / 90 / 6-12 Month Plan:

30 Days: Build context across the Amplify domain by learning the teams’ areas of ownership, architecture, and core workflows. Establish trust with engineers and partners while contributing to technical discussions and trade-off decisions.

60 Days: Assess team roadmaps and delivery practices, incorporating input from engineers and stakeholders. Align priorities with the technical direction and business goals you are helping to shape, and begin contributing to hiring and team growth.

90 Days: Improve how teams and stakeholders work by introducing or refining tools, processes, or architectural approaches. Provide technical leadership through reviews, guidance, and targeted hands-on contributions where helpful.

6-12 months: Be a trusted owner of your teams’ platforms and systems, known for delivering meaningful, scalable impact. Partner closely with product and design to drive adoption of Amplify systems and evolve them to support Klaviyo’s continued growth.

Technologies We Use:

Klaviyo’s platform is primarily built with Python and React and runs on AWS. New hires join us from a wide range of technical backgrounds and are supported in learning our stack. Core technologies include:

• Python / Django / FastAPI
• Typescript / React
• MySQL / Redis / Memcached
• RabbitMQ / Celery / Apache Kafka / Apache Pulsar
• AWS / Terraform / Kubernetes

Location & Work Model

This role is based in Dublin, Ireland, and follows a hybrid working model. Klaviyo supports work authorization and relocation for this position.

At Klaviyo, we enjoy tackling meaningful engineering challenges and value people who take ownership, learn continuously, and collaborate openly. We are committed to building inclusive teams and encourage applications from candidates of all backgrounds.

Klaviyo is growing fast and we have openings for all skill levels across all of our teams. Learn more about our engineering culture at https://klaviyo.tech

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.

Please see the independent bias audit report covering our use of Covey here

#indeedDUB