Principal Engineer - Remote in DE/UK/PT

⭐ You'll thrive in this role if you:

• Have 10+ yearsin software engineering, with demonstrated experience leading technical direction across a team, whether in a formal Staff/Principal title or equivalent scope.
• Have led technical directionacross a team of 5-15 engineers without being the manager - through RFCs, prototypes, and earning trust.
• Think in end-to-end systems - you can trace a data quality issue from a customer-facing report back through the analytics layer, processing pipeline, queue, and ingestion point.
• Have shipped a major system rewriteor migration incrementally - feature flags, phased rollouts - in a system where correctness matters as much as uptime.
• Are fluent in TypeScript/Node.js and comfortable with AWS (ECS, Lambda, SQS, Aurora).
• Have a hands-on experience with queue-based architectures (SQS FIFO, Kafka) at scale.
• Have a DevOps mindset - you own what you build, from technical design to deployment, monitoring, and operational health.
• Care about observability as a discipline - SLOs, dashboards, runbooks, post-mortems that become preventive guardrails.
• Communicate clearly in writing - tradeoff framing that other engineers actually read and reference.

Nice to have:

• Familiarity with analytics layers (Cube.js, Snowflake, CDC pipelines)
• Climate tech, carbon accounting, or compliance-grade data systems
• Series A/B startup experience

💚 Why Join Cozero?

• 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 9+ 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.

📍 Where You'll Work

Fully remote within Germany, Portugal or the UK.

🌱 Benefits

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

We're committed to building diverse teams and creating an inclusive workplace. We welcome applications from all qualified candidates regardless of ethnic origin, gender, religion or belief, age, or sexual identity. Our recruitment process is fair, objective, and based solely on the skills and qualifications required for this role.