DevOps Engineer (m/f/d)

Bangalore, Remote India

Hello 👋 I am Servesh, Co- founder and CTO at Kayzen, and I am now looking for a DevOps Engineer who will be part of our Engineering team. 🙌 But wait, you have not heard of Kayzen before? 😃

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.

The Team

The Platform Engineering team owns Real-time bidding (RTB) platform, a Real-time budget system, Real-time event processing, Stream data processing engine and multiple other complex large-scale distributed components and data pipelines. We work closely with data scientists, data analysts, product and business teams. We are responsible for some of the most technically challenging work, for example:

• Handling ~2 Million Req/sec in sub-millisecond latency
• Handing & managing ~Petabytes of data
• Managing distributed systems deployed across multiple data centers
• Optimizing JVM and Linux kernel for optimal performance
• Managing our own data center spread across the globe consisting of thousand of powerful servers
• Working on some of the most challenging problems of Ad-Tech

Sounds interesting. Isn't it?

About the Role

We are looking for a DevOps Engineer to build and scale the backbone of our global RTB platform. You will move beyond manual server management to engineer automated, self-healing infrastructure that handles petabytes of data with sub-millisecond latency. This role is about treating our private data centers like a programmable cloud.

Responsibilities

- Engineering and Provisioning -

• Develop and maintain automated provisioning pipelines (PXE, ZTP) to deploy bare-metal servers ( configure hardware, peripherals, services, settings, directories, storage, etc. in accordance with standards and project/operational requirements) at scale across global data centers.
• You research and recommend innovative and automated approaches for system administration tasks.

- Operations and Support -

• You perform regular security monitoring to identify any possible intrusions.
• You repair and recover from hardware or software failures, coordinating with impacted teams.

- Maintenance -

• You apply OS patches and upgrades on a regular basis, and upgrade administrative tools and utilities.
• You maintain data center environmental and monitoring equipment.
• You perform ongoing performance tuning, hardware upgrades, and resource optimization as required.

Requirements

• You are flexible to work in rotational shifts as part of the incidence response team.
• You have a Bachelor degree, with a technical major, such as engineering or computer science.
• You have good knowledge of coding with Shell and Python/Java and SQL commands.
• Hands-on experience with Terraform or Ansible or Puppet/Chef for managing bare-metal configurations and automations.
• Strong understanding of L4/L7 load balancing (HAProxy/Nginx) and network performance tuning (TCP/IP stack optimization).
• You have 8+ years of system administration/debugging experience, scripting and related tools.
• You have good knowledge on pipeline/orchestration tools like Jenkins/Ariflow and similar platforms  as mandatory. 
• You have good knowledge on Observability platform experience (Prometheus, Grafana, InfluxDB) as mandatory
• You have good knowledge of Kubernetes will be an added advantage.
• You have systems Administration/System Engineer certification in Unix will be an added advantage.

What do we offer?

• Reporting directly to Co-founder & CTO
• Direct access to top management and an extremely “visible” role
• Exceptional career growth and learning opportunity
• A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market
• A fun, driven, and multinational team located across Germany, India, UK, Argentina, Ukraine, Turkey, Spain  and many more countries
• A flexible work-from-home arrangement
• A 500-dollar home-office setup budget
• A 1000-dollar annual learning and development budget

Senior Sales Director - Apps (m/f/d)

London, EU Remote

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Hello👋I am Andrew, General Manager Revenue at Kayzen. I am now looking for a Senior Sales Director, - Apps  to join our global team and play a pivotal role in scaling our reach to top app developers worldwide  🙌

In this role, you will play a vital role in driving customer satisfaction, fostering long- term relationships and contributing to the overall growth and success of the company. As a growing company and team there is a lot of opportunity for the right candidate to grow and develop with the company. 

But wait, you have not heard of Kayzen before?😃

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the core pillars of performance, transparency, control, and empowerment, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.

The Team

You will work with a carefully selected, diverse and globally distributed team from customer success, engineering, data science, design, marketing, product and more. We are highly motivated and aligned in our quest to disrupt the multi-billion dollar mobile ad-tech industry. Sounds interesting?

The Role

As our Senior Sales Director, - Apps, your primary focus will be to drive new businesses from the leading Global App Developers. The leaders in Kayzen’s team who you will closely interact with are our marketing lead, SDR resources and our customer success lead (onboarding and growing customers you sign and bring on board). Apart from your primary tasks, you are welcome to contribute to multiple areas in the organization such as product, marketing and partnerships. Since our key product and customer success team members are located globally, we are open to a remote setup for this position. For optimal overlap with customers’ time zones and internal teams your main working location should be anywhere between CET and US East time zone.

Responsibilities

• Excel at acquiring new app customers (focus: outbound) who generate sticky, sustainable revenue growth from the top 150 global apps
• Actively engage with customers, partners and other market participants to identify and propose new opportunities for revenue growth
• Cooperate with our marketing team to help build our narrative and communication for the target customer profile of App Developers
• Understand customer needs and bring in new ideas on how we can expand our product to add value for customers
• Continuously identify potential sales and marketing bottlenecks and implement relevant improvements
• Build strong relationships with leaders within the ad-tech industry and key customers and partners. Represent Kayzen at industry events.
• Working closely with the SDR team to build pipeline and create opportunities
• Keep Hubspot up to date and ensure accurate record keeping
• This is an individual contributor role and the key success metric is new, signed app developer customers for Kayzen

Requirements

• At least 6 years of business development / sales experience in ad-tech or mobile app-development industry
• Previous experience in managing B2B sales or partnerships holistically with complex products or services
• Knowledge of the programmatic landscape and understanding of the performance media sector are essential. 
• Detail-oriented and process driven with a structured problem-solving attitude and a KPI driven approach.
• Great work ethics, results orientation, persuasiveness and high level of initiative and assertiveness
• Good business acumen with an ability to identify and execute on growth opportunities
• Enjoying working in a fast paced and dynamic start-up environment

What do we offer?

• Exceptional career growth and learning opportunity
• A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market
• Direct, day-to-day work experience with the management
• A fun, driven, and multinational team located across Germany, India, Argentina, Israel, Ukraine, Turkey, the UK and more countries
• A flexible work-from-home arrangement
• A 500-dollar home-office setup budget
• A 1000-dollar annual learning and development budget

Senior Data Scientist (m/f/d)
Europe, Remote
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Hello👋I am Puneet, Co-founder and CPO at Kayzen, and I am now looking for a Senior Data Scientist to join our team 🙌

But wait, you have not heard of Kayzen before?😃

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.

The Team

You will work with a carefully selected, diverse and globally distributed Data Science team (like Heiko, Chen) on various machine-learning models that process terabytes of data, serving billions of ad requests and users around the globe in real-time. We are highly motivated and aligned in our quest to disrupt the multi-billion dollar ad-tech industry. We would like you to be part of our journey, as our Senior Data Scientist (m/f/d).

Responsibilities

Our day-to-day work in Data Science and Machine Learning encompasses a wide range of activities, including:

• Enhancing Models: Continuously improving existing models by incorporating new features, fine-tuning parameters, and utilizing additional data.
• Algorithm Development: Collaborating with our Machine Learning Engineering team to develop and deploy scalable supervised and unsupervised learning algorithms.
• Data Exploration: Identifying and exploring new data sources while researching innovative ways to leverage both new and existing data effectively.
• Solution Research: Investigating new Machine Learning solutions to optimize every step of our value chain.
• A/B Testing: Regularly conducting and evaluating A/B tests to drive insights and refine our strategies.

You’ll be a great fit if you resonate with the following principles of Data Science and Machine Learning:

• Simplicity First: We prioritize finding the best solutions to challenges rather than forcing problems to fit predetermined solutions.
• Impact-Driven: We leverage Machine Learning to enhance our product and drive performance for our clients, always focusing on tangible business outcomes.
• Collaborative Spirit: Our teams consist of analysts, engineers, and data scientists, making strong communication skills essential for success.
• Embrace Experimentation: We believe in the power of experimentation to innovate and refine our approach continually.

Requirements

• Extensive experience in developing data science products, from initial research through to production deployment.  
• Strong coding skills with a focus on clean, reproducible, and well-tested code.  
• Proficient in key tools and technologies including Python, Spark, Hadoop, Airflow, Docker, and SQL.  
• Hands-on experience with algorithms for handling sparse and large datasets, including applications in prediction, clustering, and outlier detection.  
• Experience in building neural network-based products for tasks such as classification, regression, and multi-task learning is highly valuable.  
• Bonus skills: Knowledge of reinforcement learning and large-scale optimization problems is a significant asset.  
• Good understanding of dashboards and SQL for developing and enhancing monitoring tools.  
• Previous experience in Ad-Tech is a must.

What do we offer?

• Directly working with Founders and an opportunity to drive direct impact
• Exceptional career growth and learning opportunity
• A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market
• A fun, driven, and multinational team located across Germany, India, Argentina, Canada, Spain, the UK and many more countries.
• A flexible work-from-home arrangement
• Opportunity to relocate to our office in Berlin
• A 500-dollar home-office setup budget
• A 1000-dollar annual learning and development budget

LLM Platform Engineer/Lead (m/f/d)

Berlin, Bangalore, Remote

Hello 👋 I am Servesh, Co- founder and CTO at Kayzen, and I am now looking for a LLM Platform Engineer/Lead who will be part of our Engineering team. 🙌 But wait, you have not heard of Kayzen before? 😃

Kayzen is a mobile demand-side platform (DSP) dedicated to democratizing programmatic advertising. We enable leading apps, agencies, media buyers, and brands to run programmatic customer acquisition, retargeting, and brand performance campaigns through its self-serve and managed service options. Built on the three core pillars of performance, transparency, and control, Kayzen powers the world’s best mobile marketing teams with bespoke solutions that fuel business growth and deliver a competitive advantage. With an unprecedented scale of 160B+ daily ad requests from 1.6B+ unique users worldwide, we serve up to 1B+ ads per day in 180 countries. Kayzen is accessible through our APIs and user interface.

The Team

The Platform Engineering team owns Real-time bidding (RTB) platform, a Real-time budget system, Real-time event processing, Stream data processing engine and multiple other complex large-scale distributed components and data pipelines. We work closely with data scientists, data analysts, product and business teams. We are responsible for some of the most technically challenging work, for example:

• Handling ~2 Million Req/sec in sub-millisecond latency
• Handing & managing ~Petabytes of data
• Managing distributed systems deployed across multiple data centers
• Optimizing JVM and Linux kernel for optimal performance
• Managing our own data center spread across the globe consisting of thousand of powerful servers
• Working on some of the most challenging problems of Ad-Tech

Sounds interesting. Isn't it?

About the Role

We are looking for an  LLM Platform Engineer  /Lead who can  evangelise AI across the company  and build the  foundational tooling, frameworks, and workflows  that allow teams to ship AI-powered features quickly and safely. This role is ideal for an engineer who understands modern AI capabilities and focuses on  developer velocity, reuse, and production readiness  rather than training complex models from scratch.

Responsibilities

• Design and build  internal AI frameworks, SDKs, and shared libraries 
• Enable teams to integrate AI features with minimal friction
• Set up  standardized patterns  for using LLMs, embeddings, agents, and workflows
• Build reusable components for  prompt management, evaluation, observability, and safety 
• Define best practices for  AI usage, cost control, and reliability 
• Evangelise AI internally through documentation, examples, and hands-on guidance
• Rapidly prototype AI-powered features and turn them into reusable building blocks
• Own AI tooling from experimentation to production

Requirements

AI Tooling & Framework Experience (Core Focus) 

• Hands-on experience with  LLM APIs  (OpenAI, Anthropic, etc.)
• Experience with  RAG pipelines, embeddings, vector databases 
• Familiarity with  prompt engineering, prompt versioning, and evaluation 
• Experience with  AI orchestration frameworks 
• Understanding of  AI observability, cost monitoring, and failure modes
• You’ve shipped at least one LLM-powered feature to production and iterated based on telemetry or user feedback.
• Comfortable with embeddings, fine-tuning, vector search, tokenization, and evaluation methodologies.
• Familiar with data lakes/warehouses, feature stores, and streaming/batch ETL; cloud (AWS/GCP/Azure).

Strong Engineering & Platform Skills 

• Excellent  Python  skills (required)
• Experience building  frameworks, platforms, or developer tooling 
• Strong understanding of  APIs, services, and system design 
• Writes clean, maintainable, production-grade code

Startup Mindset

• Bias for shipping and iteration
• Can translate AI complexity into simple abstractions
• Comfortable with ambiguity and rapid change
• Thinks in terms of  leverage and reuse , not one-off solutions

Less About

• Heavy model training or research
• Designing custom ML algorithms
• Academic optimization work.

Nice to have

• Experience with  agent-based systems  and tool calling
• Experience setting up  guardrails, moderation, and safety checks 
• Familiarity with  Docker, cloud infra, and CI/CD 
• Prior work in  platform teams or enablement roles

What do we offer?

• Reporting directly to Co-founder & CTO
• Direct access to top management and an extremely “visible” role
• Exceptional career growth and learning opportunity
• A unique opportunity to be part of an experienced team of industry experts and entrepreneurs who bring massive change to the Adtech market
• A fun, driven, and multinational team located across Germany, India, UK, Argentina, Ukraine, Turkey, Spain  and many more countries
• A flexible work-from-home arrangement
• A 500-dollar home-office setup budget
• A 1000-dollar annual learning and development budget