Senior Platform Engineering - Remote (DE, UK, PT, ES)

You will build the automation foundation for the manual data quality checks a single team member has held for years and is now transitioning out of. You keep our analytics layer running while planning its successor. You raise developer experience as a measurable discipline. You are hands-on, you write code daily, and you set the standard for how the engineering group builds and ships., * Own Application & DevEx in the Platform group: developer frameworks, tooling, framework upgrades (NestJS, TypeScript ecosystem), test infrastructure, local dev flow, build pipelines.

• Build the automation foundation for Anja’s manual data quality checks, pairing with Ghaith and Ghassen who own the check logic.
• Bridge DevOps and data engineering. Cover the data layer Hugo does not: Snowflake evolution, product data structures, data tooling landscape.
• Keep CubeJS running while architecting the migration off it, in partnership with the Data team.
• Raise developer experience as a discipline. Measure build times, test flakiness, PR turnaround. Reduce them.
• Cover GDPR posture on the platform side, either directly or in close partnership with whoever the founders bring in for compliance.
• Participate in the on-call rotation.
• Mentor across squads through code and design reviews. Ship golden paths, templates, and docs that reduce dependence on you., * Real technical challenge - You’re joining a growing system with real complexity. Work directly reduces carbon emissions at scale. Not theoretical, actual tons of CO2.
• Actual climate impact - Series A funded, growing fast, working with enterprise customers who trust us with their decarbonization journey.
• Exceptional team - Work directly with our founders. And 10+ engineers across Germany, Portugal and the UK. Multicultural, senior-leaning, collaborative, and actually passionate about climate action.
• You’ll grow fast - Flat hierarchy. Your ideas ship. Direct impact on product and strategy.

• Have 8+ years in software engineering with 3+ years in a senior IC role owning developer platform, developer experience, or data platform work.
• Have straddled backend and data engineering deliberately. Fluent TypeScript / NestJS, comfortable in Python, experience with a data warehouse (Snowflake, BigQuery, Redshift, or equivalent).
• Have owned DevEx as a first-class product with measurable outcomes: build times, test flakiness, PR turnaround.
• Have taken over a system from a single point of failure. You know how to do knowledge transfer well.
• Have opinions about test infrastructure at scale and can defend the choices you made in a real codebase.
• Have shipped data quality automation: Great Expectations, dbt tests, custom frameworks. You know invariants matter more than assertions.
• Are AI-native in your engineering practice (Claude Code, Cursor, or equivalent) and have views on where AI helps and where it does not.
• Communicate in writing first and are comfortable with an ambiguous, broad charter you will shape as much as inherit.

• 27 vacation days + 1 day life event leave (Wedding, Birth of child etc.) + national holidays (Depends on location).
• 500 EUR annual learning and development budget.
• 500 EUR one-time home office setup.
• 100 EUR monthly coworking budget (for those outside Berlin headquarters).
• VSOP (Virtual Stock Options) - share in Cozero’s success.
• Regular team events every year