Job
- Level
- Senior
- Job Feld
- IT, Software, DevOps
- Anstellung
- Vollzeit
- Vertragsart
- Unbefristetes Dienstverhältnis
- Ort
- Berlin
- Arbeitsmodell
- Full Remote
Job Zusammenfassung
In dieser Position entwickelst du die technische Architektur unserer Datenplattform weiter, sorgst für hohe Zuverlässigkeit und Skalierbarkeit und führst technische Initiativen zur Verbesserung der Qualität im gesamten Engineering-Team.
Job Technologien
Deine Rolle im Team
- Cozero's platform turns enterprise activity data into auditable CO2 numbers. Our platform is trusted by large enterprise customers with their full decarbonization journey.
- We are at an inflection point. The codebase works. The customers are real. The complexity is growing faster than the team. Looking for a Principal Engineer who can own our codebase quality and partner with our Head of Engineering in ensuring a purpose-fit architecture across our platform.
- You'll be the most senior IC on our engineering team, partnering with our Head of Engineering to define and drive the most impactful technical initiatives of 2026, and raise our bar from 'works most of the time' to finance-grade reliability.
- If you're excited about building an economy where every company creates an impact for a sustainable world and empowering companies to decarbonize and boost their business performance, we'd love to hear from you!
- What you'll own:
- Technical architecture of our data platform (NestJS, Aurora PostgreSQL, SQS, Lambda, Cube.js/Snowflake) and its evolution toward reliability and scale.
- Cross-cutting technical initiatives from design through production: release, observability, and long-term maintainability.
- Engineering standards through tech doc reviews, architectural decisions, and reusable patterns that raise quality without slowing delivery.
- Technical decision-making across the team - resolving cross-domain disagreements with clarity, data, and written proposals.
- Knowledge distribution, mentoring engineers and building habits that reduce single points of failure.
Unsere Erwartungen an dich
Qualifikationen
- Have led technical direction across 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 rewrite or 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 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
Erfahrung
- Have 8+ years in software engineering, with demonstrated experience leading technical direction across a team, whether in a formal Staff/Principal title or equivalent scope.
- Have a hands-on experience with queue-based architectures (SQS FIFO, Kafka) at scale.
- Series A/B startup experience
Unser Angebot
- Fully remote within Germany, Portugal or the UK.
- Competitive base salary
- 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
Benefits
Work-Life-Integration
Gesundheit, Fitness & Fun
Themen mit denen du dich im Job beschäftigst
Job Standorte
Das ist dein Arbeitgeber
Cozero
Cozero ist ein innovatives SaaS-Startup, das Unternehmen in der Logistik, dem Transport, der Fertigung und den Medien bei der Reduzierung ihrer CO₂-Emissionen unterstützt. Die Climate Action Platform ermöglicht eine effektive Dekarbonisierung und nachhaltige Geschäftspraktiken.
Description
- Unternehmenstyp
- Startup
- Arbeitsmodell
- Full Remote
- Branche
- Energiewirtschaft, Umwelt
Principal Engineer
- Ort
- Berlin
- Arbeitsmodell
- Full Remote
- Diversität
- Für alle Personen geeignet (m/w/d)
- Nur Englisch
- Nur Englisch erforderlich
