As the first point of contact in the sales cycle, you are on the front lines. We consider oBDR role 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 Commercial 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
• 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

  Requirements:

• Full authorisation to work in the UK without any restrictions

#LI-Hybrid 

About the Role

Professional Services team members are critical to our customers’ success. They combine enterprise-grade project ownership, deep Klaviyo and martech expertise, and consultative engagement skills to deliver high-impact implementations and strategic technical solutions for complex customers. They lead scoped, post-sales engagements, shaping how work is delivered and scaled.

In this role, you will:

• Own strategic customer engagements end-to-end, from shaping delivery in partnership with Sales to driving successful implementation and long-term adoption alongside Customer Success and Partner teams.
• Operate as a senior individual contributor who is trusted by customers and internal stakeholders to lead through complexity, influence at the executive level, and consistently deliver measurable outcomes for enterprise accounts.
• Combine strong delivery/project leadership with technical depth and solution design.

How You’ll Make a Difference

Core Responsibilities

Shape and scope strategic engagements

• Assist in defining Statements of Work (SOWs) that clearly articulate scope, deliverables, timelines, dependencies, and success metrics for complex technical engagements, ensuring alignment between customer goals and Klaviyo delivery capabilities.
• Lead consultative conversations with customers to clarify business objectives, identify risks, and translate desired outcomes into actionable technical implementation plans.

Lead strategic technical engagements

• Serve as the owner for key technical phases of the customer journey, ensuring projects are delivered on time, on budget, and in line with agreed outcomes.
• Build strong stakeholder relationships and communicate effectively with internal and external stakeholders to maintain visibility, accountability, and momentum toward customer goals.
• Anticipate risks, build mitigation strategies, and adjust plans to keep enterprise projects on track.

Act as a strategic advisor and subject-matter expert

• Become a deep expert in the Klaviyo platform and surrounding martech ecosystem, from data models and integrations to messaging channels (Email, SMS) and CDP use cases.
• Translate customer business goals into technical and operational solutions that leverage platform capabilities and best practices.
• Educate and enable internal teams and customer stakeholders, becoming the go-to resource for complex questions, best practices, and solution tradeoffs.

Drive repeatable, scalable solutions and continuous improvement

• Approach engagements with a highly analytical mindset - solving for the specific customer first, then identifying patterns and codifying repeatable solutions or feeding insights to internal product and engineering teams.
• Contribute to internal initiatives and process improvements that elevate overall Professional Services delivery quality and consistency.
• Maintain excellent operational hygiene by regularly updating tools and systems (e.g., project status, risks, timesheets) without management reminders.

Lead through influence and mentorship

• Demonstrate executive presence and the ability to articulate solution tradeoffs, securing buy-in from technical and non-technical stakeholders across all organizational levels.
• Provide informal coaching and mentorship to peers, sharing best practices and supporting skill development across the team.

Technical Solution Leadership

• Serve as an ongoing technical advisor for enterprise customers, translating business goals into robust technical designs that align with objectives and industry best practices.

• Take full ownership of technical deliverables and their project milestones, collaborating with customer teams and internal teams to ensure high-quality outcomes.
• Use your technical expertise to design and prototype tailored and scalable solutions for internal and external projects.
• Quantify and communicate business cases for product enhancements, using evidence from customer usage to inform roadmap discussions for enterprise needs.
• Act with urgency and precision to troubleshoot complex technical issues, ensuring customers receive best-in-class support during critical moments.

Who You Are

Experience

• 4+ years in SaaS Professional Services, implementation, solution consulting, or similar customer-facing technical roles, with a track record of leading enterprise-level projects or solutioning.
• Proven success working with multiple stakeholders across diverse teams and departments in complex, often global, environments.

Consultative & Commercial Acumen

• Comfortable articulating how Professional Services accelerate time to value and business impact.
• Adept at balancing technical depth with commercial clarity, ensuring proposed engagements are both feasible to deliver and impactful for customers.

Domain & Technical Skills

• Hands-on experience with modern web development languages/frameworks (eg. HTML, CSS, JavaScript) and general-purpose programming languages (eg. Node, Python), and a proven ability to learn new languages and technical concepts with minimal guidance.
• Strong understanding of the martech landscape and surrounding technologies, including Email, SMS/Mobile, and how to leverage a CDP for advanced use cases.
• Demonstrated familiarity with APIs, webhooks, and integrating SaaS platforms into complex enterprise tech stacks; able to guide customers toward best-practice architectures.

Leadership & Collaboration

• Demonstrated executive presence and ability to engage, influence, and align C-level and senior stakeholders.
• Excellent communicator across written, verbal, and virtual channels, able to convey and translate technical and marketing concepts to a range of audiences (project managers, marketers, developers, executives).
• A strong collaborator with a positive attitude, curiosity, and eagerness to learn, who thrives in a rapidly changing environment.
• Experience acting as a technical advisor or architect for complex implementations, especially in martech, CDP, or B2C CRM contexts.

Working Style

• Proactive, resourceful problem-solver who takes ownership and drives solutions forward autonomously.
• Consistently maintains operational rigor (status updates, risks, time tracking) without management reminders.
• Interested in mentoring others and contributing to team-level execution and enablement beyond individual delivery.

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

Why you should join the SMS International team that is part of Mobile Platforms

The Mobile Platforms team at Klaviyo is responsible for empowering the over 150,000 Ecommerce clients we work with on a global scale to deliver effective experiences on mobile devices. This team focuses on performance optimization and continuous development of our Mobile Marketing Channels (SMS, Push Notifications, In App Messages, WhatsApp and RCS), Mobile SDKs (iOS, Android and React Native). While Email was how Klaviyo began, Mobile messaging is truly the way of the future.

The SMS International team within Mobile Platforms is responsible for the expansion of SMS capabilities into new countries and regions and is also spearheading the development of RCS as a new capability to be offered to customers alongside existing channels. We have an ambitious roadmap for 2026 that puts the team at the heart of the company’s objectives and it is an exciting time to join the team!

About the Role

As a Fullstack Software Engineer II joining the SMS International team you will be working with a team of 5 other colleagues to deliver RCS and SMS International expansion to meet the company’s objectives. You will get the chance to build brand new services, understand how they fit into the bigger picture and plan how to architect and scale them successfully to serve our customers. 

Technologies we use (not exhaustive):

• Python, Django, Go, React, SQS, Celery, MySQL, DynamoDB, Elasticache, Redis
• Amazon Web Services (EC2, RDS, Aurora, etc.), Terraform, Kubernetes, Splunk, Buildkite, Grafana, Chronosphere and other modern DevOps tools

What we are looking for

• 3-5 years of experience in a software engineering discipline
• Experience with full stack application development
• Experience working with both monolithic and microservices architectures
• Experience with database design that can withstand high query volumes
• Experience with CI/CD pipelines
• Experience debugging performance issues and improving application performance
• An interest and aptitude for collaboration across teams and disciplines

Nice to Have

• Experience creating new services with scalability in mind. Exposure to large-scale system design
• Experience with AWS or any similar cloud provider
• Communication domain experience

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

The Catalog Insights Team’s mission is to arm Klaviyo customers with the data they need to drive sustainable business growth through efficient and effective product placement. Beyond analytical views, this team is also highly focused on actionability: finding creative ways for customers to go from catalog insight to revenue-driving marketing action in a matter of clicks.

As an Engineer on the Catalog Insights team you can expect to be deeply involved in the technical discussions and delivery of the features our customers need. You'll have ownership of projects that contribute to the team's mission, goals, and roadmap. You'll collaborate alongside technical product owners and product managers to build a product and develop a technical strategy to deliver products that make it easy for users to understand their data and performance. Your tech stack will include Python, Typescript, React, AWS, Kubernetes, Django, and Spark. 

How You Will Make A Difference

• Deliver key product capabilities for Catalog Insights to support our recently launched Marketing Analytics product.
• Design and build systems and data pipelines that process large volumes of data to deliver experiences providing value to Klaviyo customers of all sizes
• Work cross functionally with product, design, and data science teams to develop product requirements and technical solutions.
• Own product solutions end-to-end, including technical design, implementation, maintenance, monitoring, and participation in on-call rotations for the services we ship.
• Have ample opportunities for growth. 

Who You Are

• 2+ years experience working in a SaaS product in full stack capacity
• Proficient in at least one modern programming language
• Degree or equivalent experience in a software engineering discipline
• Able to communicate well
• Able to work with others on a team
• Able to learn continuously and adapt to a high growth environment
• Able to stick with and solve difficult problems
• Excited to learn and understand data visualization in addition to full stack engineering

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 team and role:

At Klaviyo, our mission is to empower creators to own their growth. As we scale, the RFP process is becoming an increasingly strategic part of how we compete and win with some of our most sophisticated customers. We're looking for a high-performing Proposal Manager to lead the charge in building and scaling our RFP response function.

This is a high-leverage, high-impact individual contributor role with significant visibility and influence across the go-to-market organization. You’ll be the first dedicated hire focused on RFP excellence—meaning you’ll play a critical role in shaping the systems, processes, and strategy behind how we respond to customer questionnaires. You won’t be building from scratch - we already have RFP software and practices in place - but you will have the opportunity to define best practices, elevate our approach, evolve our systems, and generally raise the bar for how Klaviyo shows up in competitive sales cycles.

You’ll find strong support and eager partners across Sales, Presales, Marketing and other parts of the business. This is a chance for someone with the right experience to shape the future of the proposal management function at a world-class SaaS company - while also directly impacting revenue, win rate, and brand perception.

This role is in the Presales organization, which also includes Presales Solution Architects and our Demo Experience team. If you're someone who thrives on crafting compelling narratives, managing complex cross-functional projects, and influencing strategic sales outcomes through precision and clarity—this role could be for you.  What you’ll get in return is the opportunity to be part of an extremely high-performing, strategically-important team that works at the exciting intersection of engineering, sales, and customer engagement.

Supervisory Responsibilities:

• N/A

How you'll make a difference:

• Serve as a trusted partner and internal champion for all things RFP—becoming the go-to expert for proposal strategy and execution.
• Own the end-to-end RFP, RFI, and security questionnaire response strategy and process from intake to submission, including:
• Defining what it means to qualify an RFP/RFI, balancing factors like effort, quality and ROI
• Importing qualified questionnaires into our RFP software
• Drafting and refining initial answers to technical, functional, and business questions in RFPs and RFIs
• Sourcing and validating inputs from subject-matter experts across the company (e.g. Sales, Product, Legal, Security, Product Marketing)
• Packaging and delivering proposals in a compelling, differentiated way that helps us win
• Maintain and improve a scalable, up-to-date knowledge base of commonly asked questions and approved answers using our RFP software, including:
• Ensuring all content is accurate, consistent and on-brand
• Reviewing new content and adding to the knowledge base as appropriate
• Partner with Sales and Go-to-Market operational leadership to ensure our process is measurable and built for maximum effectiveness and efficiency, including:
• Ensuring an effective qualification process and healthy RFP response rate 
• Tracking and improving RFP win rates and turnaround times

Who you are:

• You have 5+ years of experience managing RFPs or proposals in a high-growth SaaS environment, preferably supporting enterprise or mid-market sales teams.
• You’re an exceptional project manager—organized, detail-oriented, and comfortable juggling multiple complex deliverables under tight timelines.
• You have excellent writing, editing, and communication skills, with a strong instinct for tailoring content to different audiences.
• You’re collaborative and low-ego—you know how to bring people together to get things done and aren’t afraid to chase down answers or ask for help.
• You’re systems-minded and always looking for ways to improve the process—whether that’s introducing a new tool, optimizing workflows, or creating better documentation.
• You understand the nuances of enterprise buying processes and what it takes to compete in a crowded market
• You’re excited by the idea of joining a company where your work will be visible, valued, and essential to how we win.

#LI-Hybrid

London, UK (Hybrid: 3 days p/week in-office)
8 month FTC (mat-cover)

About the role:
This is an 8 month FTC maternity-cover. We are looking for an experienced hands-on Senior Language Manager to own and optimise the language and localisation strategy for Germany. Native/ fluent German language skills, essential. 

Job Summary:
Localisation efforts at Klaviyo are centred around linguistic and cultural excellence, teamwork and scale. We own the linguistic and cultural quality of every touchpoint a German customer has with Klaviyo: the product, the website, marketing campaigns, customer education, and partner and developer portals. Our work is about providing our customers with high quality localisation and an experience that feels locally relevant and fuels international growth for both our customers and Klaviyo. 

You will step directly into a fully embedded, senior individual contributor position and own everything the current person owns, with full continuity responsibility. We need someone who can hit the ground running and carry the German market at the same quality bar from day one.

Your Impact: 

1. Own the German Language Infrastructure. Proactively manage the German style guide and glossary as living documents, ensuring our Language Service Provider delivers consistent, high-quality content across the entire customer journey. 
2. Own German Linguistic Quality across all customer touch points ensuring we deliver the best German customer experience. 
3. Champion the German customer experience. In practice this includes work such as ensuring search is optimised for German, Product is QA’ed, the website is optimised, the customer journey is mapped out to identify gaps and opportunities. 

Duties:

• Develop and maintain linguistic and cultural standards and guidelines, define quality expectations across the whole localised customer journey, including supporting the development of style guides, glossaries, tone and voice of the Klaviyo Product (customer, partner and developer) and Content (Marketing, Customer Education and others) in the market.
• Review German translation and monitor the linguistic quality of the German language, provide feedback and context to the translation teams, in order to ensure the best resource fit for the highest quality impact.
• Communicate proactively with cross-functional teams to anticipate, identify and fix linguistic and localisation issues related to Germany.
• Proactively engage with relevant stakeholders (e.g. Product, Marketing, Customer Education) for additional context and insights on high priority content for localisation to define and influence the best creative, linguistic and localisation approach.
• Facilitate collaboration between internal stakeholders and vendors, making sure the necessary resources have access to the relevant information, and advising on the best course of action regarding localisation processes.
• Collaborate closely with the Localisation team and internal stakeholders to collect relevant cultural and linguistic information about Klaviyo Germany and support the localisation effort in bringing this content to the global audience.
• Proactively contribute to the creation of efficient, effective localisation processes and optimisation of those over time.
• Train, develop and manage a highly-effective team of German linguists through our localisation supplier that consistently delivers high quality output.
• Be a champion internally for the German Klaviyo customer
• Performs other related duties as assigned.

Who You Are:

• 5+ years of experience in a comparable localisation role on the buyer/client side
• Bachelors or Masters degree in Languages/ Translation/ Localisation/ International Studies
• Fluency in English and native knowledge of German for Germany essential
• Proven experience in translation, localisation and language quality management.
• Demonstrated experience in localisation of Product, Marketing and Support content for Germany, with scalable localisation infrastructures and language quality frameworks
• Experience with Smartling or similar TMS platforms a plus
• Deep understanding of localisation specificities and pitfalls
• Experience in creative writing a bonus
• Authorisation to work in the UK without restriction

Soft Skills: 

• Strong business acumen with proven stakeholder management skills
• Ability to show initiative and work independently, and drive initiatives at a strategic level
• Ability to hold teams accountable to a high quality standard
• Excellent presentation, communication, and interpersonal skills

#LI-Hybrid #LI-JW1

The role

Product Managers at Klaviyo are builders with sharp product sense, strong technical proficiency, and a relentless focus on outcomes. They own work from vision to execution, driving meaningful value for customers and the business. As a Product Manager, you will drive strategy for a complex product area, lead cross-functional initiatives, and shape the future of our platform at scale. This role is ideal for someone who thrives in complexity, moves quickly, and balances urgency with thoughtful execution, while influencing across the organization and with senior leadership. Please note this is a hybrid role that requires 3 days/week in our London office. Fully remote candidates will not be considered at this time. 

How You’ll Make a Difference

• Lead the end-to-end strategy and execution for launching and scaling Klaviyo's platform into new geographic markets and languages.
• Work across the finance and billing teams to deliver international billing solutions from multiple currencies to new methods of payment.
• Define and implement localization-as-a-service frameworks to empower product teams across Klaviyo to easily ship features tailored for new international markets.
• Drive the international growth strategy for a large and complex product area, defining success by key expansion metrics, and prioritizing the most significant opportunities in line with company goals.
• Adapt strategy as you learn, knowing when to start, scale, or stop investments.
• Partner with engineering, design, and analytics to set vision, build a roadmap, and deliver against goals while clearing blockers and strengthening team health.
• Lead with technical proficiency—deeply understanding how things work to guide complex initiatives and improve developer and customer experience
• Accelerate velocity in zero-to-one product areas by fostering rapid experimentation, reducing ambiguity, and shortening cycle times
• Build alignment across adjacent teams by identifying dependencies and creating shared strategies.
• Use customer insights, data, and deep market analysis across target expansion nations to inform product decisions and shape broader organizational strategy, identifying barriers and accelerators to international adoption.
• Demonstrate leadership by pulling together people across functions, setting the pace, and inspiring the team—even amidst complexity at scale
• Elevate product craft and intuition, balancing strategic thinking with a builder’s mindset to transform workflows with AI at the center
• Value collaboration by building strong, co-located relationships with peers and teams, while supporting remote contributors where appropriate

Who you are

• 8+ years in tech, including 5+ in product management with a proven track record of delivering high-impact products, specifically in international expansion or growth-focused product areas.
• Demonstrated experience in a P&L-responsible product role, with a strong understanding of international business models, pricing, and growth loops.
• Familiarity with digital marketing, commerce, or subscription business models in global markets, and experience navigating regulatory compliance related to international data and financial transactions.
• Strong technical intuition, customer empathy, and data-informed decision-making
• Exceptional communication skills with the ability to influence and align stakeholders
• 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.
• Fluency in a non-English language relevant to a key Klaviyo expansion market is a strong advantage.

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

Product Managers at Klaviyo are builders with sharp product sense, strong technical proficiency, and a relentless focus on outcomes. They own work from vision to execution, driving meaningful value for customers and the business. This role is ideal for someone who thrives in complexity, moves quickly, and balances urgency with thoughtful execution, while influencing across the organization and with senior leadership. Please note this is a hybrid role that requires 3 days/week in our London office. Fully remote candidates will not be considered at this time.

As a Product Manager for the International SMS team, you’ll be responsible for expanding Klaviyo SMS and RCS offerings internationally. With a strong international SMS offering and newly launched RCS product, this Product Manager will lead Klaviyo in continuing to grow internationally. You’ll work closely with your own engineering team, design, other PMs on related teams and other stakeholders to influence our expansion plans and to ensure we successfully launch in each country including phone number management, compliance needs and go-to-market considerations. You will also monitor changes in these countries as they happen to ensure we are on top of how we need to adapt to changing regulations and practices. 

SMS is a fast-growing part of Klaviyo’s business and this is an opportunity to be a critical part of that growth. The PM for this role will own and define the strategy and roadmap for this product area to help shape the future of this work. 

You’ll report to the Group Product Manager, Mobile Platform.

How You’ll Make a Difference

• Drive strategy for a large and complex product area, defining success and prioritizing the most significant opportunities in line with company goals.
• Adapt strategy as you learn, knowing when to start, scale, or stop investments.
• Partner with engineering, design, and analytics to set vision, build a roadmap, and deliver against goals while clearing blockers and strengthening team health.
• Lead with technical proficiency—deeply understanding how things work to guide complex initiatives and improve developer and customer experience
• Accelerate velocity in zero-to-one product areas by fostering rapid experimentation, reducing ambiguity, and shortening cycle times
• Build alignment across adjacent teams by identifying dependencies and creating shared strategies. Use customer insights, data, and market analysis to inform product decisions and shape broader organizational strategy. Spend a lot of time with customers to develop deep empathy and insights, which you’ll build into your product roadmap.
• Demonstrate leadership by pulling together people across functions, setting the pace, and inspiring the team—even amidst complexity at scale
• Elevate product craft and intuition, balancing strategic thinking with a builder’s mindset to transform workflows with AI at the center

Who you are

• 1-3 years of product management experience in B2B and/or eCommerce
• Strong technical intuition, customer empathy, and data-informed decision-making
• 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.

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

ybrid Role Requirement: London, United Kingdom (In-Office 3x/Week)
Team: Sales – Mid- Enterprise

At Klaviyo, we believe every customer interaction is an opportunity to build stronger relationships. That mindset starts with our Sales team—and we're growing.

We’re looking for a Mid-Enterprise Account Executive to join our tenured, high-performing team selling into some of the world’s most recognizable brands. This is more than just closing deals. It's an opportunity to shape the future of our upmarket business by bringing Klaviyo to customers who are reimagining their marketing tech stack.

From first touch to signed agreement, you’ll own the full sales cycle—partnering closely with teams across Solutions, Customer Success, Product, and Engineering to drive long-term value for our customers.

You’ll be selling to companies like Birkenstock, Represent, Castore, and Dishoom. It’s a big responsibility—and a bigger opportunity.

What You'll do and How You’ll Make a Difference:

• Transform workflows by putting AI at the center, building smarter systems and ways of working from the ground up.
• Continuously experiment with AI tools—testing, learning, and sharing insights to keep the team and organization ahead of the curve, as well as championing new applications that accelerate workflows and elevate quality responsibly.
• Apply AI fluency to streamline work, reallocate saved time and reinvest into more meaningful, high-impact areas. 
• Build and grow Klaviyo’s Mid-Market and Enterprise client base
• Drive full-cycle sales efforts: prospecting, discovery, demo, negotiation, and close
• Create and execute territory and account strategies for long-term growth
• Partner cross-functionally with Solutions Architects, Customer Success, and Marketing to deliver a world-class buying experience
• Provide mentorship and leadership across the AE team
• Share market insights with Product and Engineering to influence roadmap decisions

Who You Are/Required Experience:

• 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.  
• You use AI tools to accelerate exploration, shorten iteration cycles, and bring sharper ideas to the table.
• As part of your craft, you’re curious, adaptable, and eager to deepen your fluency in AI (understanding capabilities, limits, and risks) as part of your craft.You don’t wait to be told what tool to try—you explore, test, and share what works.B
• ased in London, UK  and available to be in-office 3 days/week
• 6+ years of closing experience, preferably in SaaS or MarTechExperience hunting net new business from self-generated leads through negotiation and closure (closed/won)Comfortable navigating strategic deals with multiple stakeholders and complex buying processes
• Experienced in technical selling—able to communicate value with clarity and confidenceKnowledge of the marketing automation or CDP space is a plus
• Resilient in the face of challenges and energized by a fast-moving environmentA natural relationship-builder with strong influencing skills
• Committed to learning, sharing, and contributing to a high-trust sales culture

Klaviyo is an Equal Opportunity Employer. We’re committed to building a company that reflects the diversity of the customers we serve—and that starts with our team.

#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

Why You Should Join the Internationalisation Platform Team

The i18n Platform team owns all the ways we create, process and deliver internationalisation features for our users at Klaviyo.  As a Senior Software Engineer, you will be a key contributor and mentor leading complex, multi-component projects across the i18n platform. You will be involved in how we manage translations, deliver new localisation features, handle multiple currencies, and improve our internationalisation processes.

You can look forward to being a part of a highly technical team with significant domain expertise. We oversee tools and services that are leveraged across the organization from the frontend UI to backend data.  The team also owns and orchestrates several services to manage the pipeline of translations with our localisation team.

As we look toward the next 6-12 months, we aim to focus on delivering LLM workflows to improve our translation capabilities, increase the availability of our Smart Translations product, and develop new features for handling different currencies in multiple regions.

Why you should join

We foster a culture of psychological safety, collaboration, and work/life balance through flexible hours and structured on-call rotations.

We practice a “you make it, you support it” attitude to our products and provide on-call support in case of incidents.  We offer compensation for on-call rotations and expect to maintain a very low number of incidents requiring call-out.  New engineers are onboarded to the on-call rotation gradually, typically joining the active rotation after their first 6 months and thorough training.
We are committed to your growth. You will be paired with a dedicated mentor and given time for focused skill development, including opportunities to attend relevant industry conferences and a growing suite of learning & development opportunities.

We enjoy a high degree of autonomy to generate innovative solutions across the entire system, learning directly from customers and suggesting cool new approaches.

Free lunch at our Aldgate office three times a week
Highly competitive salary, equity package, and comprehensive health benefits.

How You Will Make a Difference

• You will lead and drive the design and execution of complex, business-critical projects across the Internationalisation platform.
• You will be responsible for implementing new functionality and establishing design patterns for complex, multi-component systems.
• You will take full lifecycle ownership of features and projects, driving requirement refinement and setting the pace for all phases of execution.
• You will proactively collaborate with cross-functional partners to influence product requirements and communicate technical needs to other teams.
• You will be an active participant in all team processes and accountable for meeting the health and operational excellence (SLOs) of your area of ownership.
• You will help interview new engineering team members and actively mentor junior engineers in your product area.

What we are looking for

• A strong interest in internationalisation, localisation, and translation.
• A desire to serve our international customers and expand Klaviyo’s capabilities.
• 5+ years of demonstrable experience delivering high-quality, customer-facing software.
• Deep understanding of complex systems (or similar large-scale distributed systems) and strong systems thinking, with a proven ability to scale, observe, and maintain services.
• Familiarity with full stack development concepts and a strong aptitude to learn.
• Experience working with both monolithic and microservices architectures
• Experience with database design that can withstand high query volumes
• Experience debugging performance issues and improving application performance
• An interest and aptitude for collaboration across teams and disciplines
• An understanding of challenges in developing software across multiple languages and catering to non-English speaking users
• Thrives in a fast paced, customer focused, and strategic environment.
• A track record of prioritizing the needs and success of the company overall above the immediate needs of the team.

Nice to Have

• Proven experience with large-scale system design and driving the technical/architectural evolution of a product area.
• Experience with AWS or any similar cloud provider
• Experience with billing systems in multiple currencies

Technologies we use (not exhaustive):

• React, TypeScript, JavaScript, HTML, CSS
• Babel, Webpack, Eslint, Prettier
• REST, GraphQL, JSON Schema, JSON:API
• CDNs (Fastly, Cloudflare)
• GitHub, BuildKite
• MySQL, Redis, Pulsar, Memcache
• Python, Django, FastAPI, Go, Gin, React, RabbitMQ, Celery, MySQL, DynamoDB, Cassandra, Redis
• DeepL, Smartling, Stripe
• Amazon Web Services (EC2, RDS, Aurora, AWS Translate, etc.), Terraform, Kubernetes, Splunk, Chronosphere, Cortex, DX, and other modern DevOps tools
• Bedrock, Claude, Cursor, LangChain, OpenAI, Gemini,

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

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

About the team:

An exciting opportunity within the Security Strategy and Governance (SSG) team whose mission is to ensure the safety and security of our customers, partners and Klaviyos as well as deliver best in class technology solutions, infrastructure and services. This is achieved by providing a robust and secure technology foundation to do great work. We solve problems using technology, embrace automation, and support Klaviyo's continued scalability and sustainable employee growth in a rapidly evolving environment.

The SSG team assists the Global Security Services (GSS) organization in developing and refining information security strategy, creating metrics and reporting, coordinating cross-functional projects, and strategically aligning global information security initiatives with the broader CISO vision. The SSG team is highly collaborative and cross-functional, working closely with various functions within the GSS team (namely Security Risk and Trust, Security Product and Development, Global Protection Services and Security Intelligence Operations), Global Technology Solutions (GTS) team and the broader Klaviyo organization.

About the role:

Your role will be a conduit between security reporting and supporting day‑to‑day security detection & response operations. Your main focus will be on building “source‑of‑truth” dashboards and metrics for the GSS organization; the rest of the time will also focus on triaging, enriching, and escalating security detections in partnership with the SIO team. The remit spans data engineering, business intelligence, security telemetry and operations so security leaders can make faster, better decisions on risk, reliability, and incident outcomes. 

​​Reporting & Analytics

Your role will be to design, implement and manage data analytics and reporting dashboards using strategic tooling and processes, ingesting data from a wide range of GSS organization’s key source systems through APIs and creating management level reports and having those published for company wide consumption. You’ll be responsible for managing the analytics and reporting dashboards in GSS and providing solutions to take us into the future using tools to create trusted, robust and reliable reports that’s easy to access and understand. You’ll work closely with security experts as well as other Klaviyo functions to understand the data, ensuring it’s accurate and governed.

Security Intelligence 

This role also necessitates a contribution to the Security Intelligence Operations team by supporting threat detection and response services. This is a hands-on role that involves triaging and responding to cyber threats and conducting investigations. As the individual develops and gains proficiency in this area, the scope of responsibilities will expand to include building detections, and contributing to threat hunts, digital forensics and incident response. As a member of the team, you will have the opportunity to work on complex security challenges and combat cyber threats specific to Klaviyo’s assets. 

How you’ll have an impact:

Reporting and Analytics

• Develop and own an effective and comprehensive reporting dashboard with visualizations, reports, and analysis that reflect the source of truth in terms of performance monitoring for the GSS organization.
• Collaborate with and support stakeholders across the GSS organization ensuring alignment on business metrics and source standardization.
• Enable automated and accurate reporting of GSS metrics in forums such as Monthly Projects and Services Meetings, PMO Reviews, Strategic Initiatives and Board Materials. 
• Support our GSS organization with analytical support to assist in data driven problem solving.

Security Intelligence

• Triage and respond to cyber threats, alerts and incidents.
• Perform host and network based log analysis in a cloud first environment.
• Leverage AI and/or build security tools to automate threat response tasks.
• Develop detailed post incident and investigation reports.
• Collaborate with detection engineers to identify threat detection use cases. 
• Work with engineering stakeholders to improve security posture post investigations.

Program & stakeholder leadership

• Identify potential risks based on trends and communicate those insights back to the organization.
• Support the management of strategic programs and initiatives and work with GSS to establish and align on business impact sizing.
• Stay up-to-date on industry trends, best practices, and emerging technologies in our competitive landscape.

Who you are:

• Proven 5+ years of experience as a business intelligence and data analytic (essential), preferably in the SaaS industry. 
• Extensive, demonstrable experience reading and writing complex SQL queries for data collection and analysis including using visualization platforms such as Tableau, Power BI, Apache Superset or similar (essential).
• Scripting experience using Python (web scrapping), dbt and bash (essential).
• Experience using or ingesting data from Splunk, Snowflake and other monitoring tools (essential).
• Experience using Atlassian Confluence and JIRA (essential). 
• Automation-first approach for all work performed (essential). 
• 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 (essential). 
• Experience of working with business areas to understand and interpret their requirements.
• Be curious, innovative, creative and agile, developing and championing new ideas, identifying opportunities, and learning fast along the way.
• Demonstrate initiative and commitment for results and the ability to set priorities and manage multiple initiatives.
• Strong time-management skills, with the ability to prioritize tasks, meet deadlines, and adapt to changing project requirements and timelines. 

Nice to have:

• 2+ years of hands-on security operations experience in cloud-native environments.
• Experience in triaging and responding to cyber threats, alerts, and incidents as well as log analysis, incident response and/or digital forensics.
• Experience securing cloud environments such as AWS, GCP, and/or Azure.
• Knowledge of security and IT frameworks such as NIST CSF, ISO 27001, SOC2, PCI-DSS.
• Experience using ASANA or any project management tools including creating integrations for reporting purposes. 
• Experience in information security and IT practices around services, cloud infrastructure, hosting and platforms.

#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

Hybrid Role Requirement: London, United Kingdom (In-Office 3x/Week Team: Sales – Large Enterprise

At Klaviyo, we believe every customer interaction is an opportunity to build stronger relationships. That mindset starts with our Sales team—and we're growing.

We’re looking for a Large-Enterprise Account Executive to join our tenured, high-performing team selling into some of the world’s most recognisable brands. This is more than just closing deals. It's an opportunity to shape the future of our upmarket business by bringing Klaviyo to customers who are reimagining their marketing tech stack.

From first touch to signed agreement, you’ll own the full sales cycle—partnering closely with teams across Solutions, Customer Success, Product, and Engineering to drive long-term value for our customers.

You’ll be selling to companies like Nestle, Unilever, Bayer, Paul Smith, LVMH & Castore. It’s a big responsibility—and a bigger opportunity.

What You'll do and How You’ll Make a Difference:

• Transform workflows by putting AI at the center, building smarter systems and ways of working from the ground up.
• Continuously experiment with AI tools—testing, learning, and sharing insights to keep the team and organization ahead of the curve, as well as championing new applications that accelerate workflows and elevate quality responsibly.
• Apply AI fluency to streamline work, reallocate saved time and reinvest into more meaningful, high-impact areas. 
• Build and grow Klaviyo’s Enterprise client base
• Drive full-cycle sales efforts: prospecting, discovery, demo, negotiation, and close
• Create and execute territory and account strategies for long-term growth
• Partner cross-functionally with Solutions Architects, Customer Success, and Marketing to deliver a world-class buying experience
• Provide mentorship and leadership across the AE team
• Share market insights with Product and Engineering to influence roadmap decisions

Who You Are/Required Experience:

• 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.  
• You use AI tools to accelerate exploration, shorten iteration cycles, and bring sharper ideas to the table.
• As part of your craft, you’re curious, adaptable, and eager to deepen your fluency in AI (understanding capabilities, limits, and risks) as part of your craft.
• You don’t wait to be told what tool to try—you explore, test, and share what works.
• Based in London, UK and available to be in-office 3 days/week
• 8+ years of closing experience, preferably in SaaS or MarTech
• Experience hunting net new business from self-generated leads through negotiation and closure (closed/won)Comfortable navigating strategic deals with multiple stakeholders and complex buying processes with enterprise global organisations
• Experienced in technical selling—able to communicate value with clarity and confidence
• Knowledge of the marketing automation or CDP space is a plus
• Resilient in the face of challenges and energized by a fast-moving environment
• A natural relationship-builder with strong influencing skills
• Committed to learning, sharing, and contributing to a high-trust sales culture

Klaviyo is an Equal Opportunity Employer. We’re committed to building a company that reflects the diversity of the customers we serve—and that starts with our team.

#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

About the Opportunity

At Klaviyo, the Sales team prides itself on being made up of marketing and product experts. While many companies hire pre-sales Solutions Engineers simply to give demos, fill out questionnaires, and explain setups, that approach makes us yawn.

We’re looking for a Senior Solutions Engineer who brings deep technical mastery, strategic thinking, and the ability to own the most complex, high-stakes Enterprise deals. This is a high-impact individual contributor role for someone who thrives in ambiguity, rolls up their sleeves to master our product at a molecular level, and uses AI and automation to punch above their weight.

As a Senior SE, you’ll be a trusted advisor to both customers and our sales organization — leading technical strategy in 6–7 figure deals, owning solution design, and setting the standard for Solutions Engineering excellence through your work.

What We Do as Solutions Engineers

We’re technical sellers who drive revenue by winning complex Enterprise deals. Our job is to own the technical win — building champions, proving value, and ensuring prospects choose Klaviyo over the competition.

We work directly with customers to architect solutions that integrate seamlessly into their tech stacks, taking a consultant-first approach that builds confidence and secures technical buy-in.

Beyond closing deals, we use customer engagements as opportunities to prototype and ship improvements to Klaviyo. Recent team projects include AI-powered demo data generators, a public Chrome extension for troubleshooting API calls, web SDK injectors, and templatized mobile apps that showcase our SDK capabilities.

If you’re a creator excited by winning high-stakes deals, prototyping technical solutions, and driving strategic revenue outcomes, this could be the role for you.

How You’ll Make a Difference

Lead the Technical Win in High-Stakes, Complex Deals

• Own technical strategy for the most complex Enterprise opportunities, navigating multi-layered stakeholder environments, competitive pressures, and sophisticated buying processes with minimal oversight

• Drive advanced technical discovery, uncovering nuanced pain points and proactively identifying differentiation opportunities

• Host technical workshops that align solutions to business outcomes, demonstrating executive presence and strategic communication

• Architect and execute Proof of Value plans that secure technical selection over competitors

• Partner closely with AEs on deal strategy, bringing competitive intelligence and industry expertise to influence outcomes

Bring Subject Matter Expertise and Industry Leadership

• Serve as a domain expert in marketing technology, CDPs, AI-driven personalization, analytics, and eCommerce

• Act as a go-to resource for competitive and industry landscape questions

• Build strong relationships with R&D, collaborating to drive positive outcomes and influence Klaviyo’s roadmap

• Contribute high-impact content to the SE Learning Library and mentor peers through example

Operate with Deep Technical Mastery and Innovation

• Become an expert across Klaviyo’s platform, from data pipelines and integrations to technical trade-offs between implementations

• Develop broad, advanced familiarity with web development, APIs, cloud computing, and modern software development practices

• Confidently coach experienced engineers on complex solution design

• Leverage AI tools and automation to scale impact and improve customer outcomes

• Prototype solutions and build proof-of-concepts that clearly demonstrate Klaviyo’s differentiation

Who You Are

Required

• 5+ years of experience in Solutions Engineering or Pre-Sales, with 3+ years leading technical strategy on high-complexity Enterprise deals (6–7 figures) with minimal oversight

• 5+ years working across modern development stacks, including Python, JavaScript frameworks (Node.js, React), RESTful APIs, SQL, and some exposure to mobile development

• Familiarity with AI-assisted development tools (e.g. Codex, Claude Code) and emerging patterns such as MCP

• Strong domain knowledge in marketing automation, CDPs, eCommerce systems, analytics, or data engineering

• Advanced discovery and requirements-gathering skills across multi-layered stakeholder environments

• Executive presence with exceptional communication skills, from executive-level conversations to deep technical discussions

• Proven ability to manage objections, handle challenging conversations, and deliver strategic insights

What Sets You Apart

• You’ve used AI to scale your effectiveness through automation, research, solution design, or development

• You bring deep competitive intelligence and understand the landscape intimately

• You build strong R&D relationships and drive outcomes through influence rather than authority

• You roll up your sleeves, dig in, and become the expert

• You elevate team performance through example and enablement

• You thrive in ambiguity and fast-moving environments

#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