Principal Engineer, Cozero
+ VSOP
More information about location
Carbon accounting and climate management solution
Be an early applicant
Carbon accounting and climate management solution
21-100 employees
Be an early applicant
+ VSOP
More information about location
21-100 employees
Company mission
To enable companies to effectively decarbonize and transform their business sustainably in light of financial implications.
Role
Who you are
- Bring 10+ years in Software engineering, and 3+ years in a Staff/Principal IC role
- 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)
- Are experienced 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
- Are great at written communication - clear tradeoff framing that other engineers actually read and reference
Desirable
- Familiarity with analytics layers (Cube.js, Snowflake, CDC pipelines)
- Climate tech, carbon accounting, or compliance-grade data systems
- Series A/B startup experience
What the job involves
- We are looking for a passionate Principal Engineer to help us transform every company into a sustainable business
- We are 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
- In this unique role, you’ll be the most senior IC on our engineering team, partnering with our Head of Engineering to drive the most impactful technical initiatives of 2026, and raise our bar from “works most of the time” to finance-grade reliability. Cozero's platform turns enterprise activity data into auditable CO2 numbers - and the technical complexity is growing faster than the team
- 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!
- We are open to hiring fully remotely for this role but require you to be located in one of the following countries: Germany, United Kingdom or Portugal
- Own the technical architecture of a data platform (NestJS, Aurora PostgreSQL, SQS, Lambda, Cube.js/Snowflake) and drive its evolution toward reliability and scale
- Lead cross-cutting technical initiatives from design through production release, observability, and long-term maintainability
- Set engineering standards through tech doc reviews, architectural decisions, and reusable patterns that raise quality without slowing delivery
- Act as the technical tiebreaker across the team - resolve cross-domain disagreements with clarity, data, and written proposals
- Mentor engineers, distribute knowledge intentionally, and build the kind of engineering culture where a small team punches above its weight
Our take
Conflicts in the 2020s and climate change are challenging energy companies, leading to an unprecedented demand for more commitment to renewable raw materials from all stakeholders. For companies, this means it is now no longer a luxury to save CO2 emissions where possible.
Cozero is a software company that creates products to fit that need. The startup was founded to enable companies to effectively decarbonise and it differentiates itself from competitors by framing these CO2 savings in the language of business - each measure details CO2 saved per Euro invested.
With over 70 enterprise customers, the company's next steps will involve accelerating its international expansion and advance its Climate ERP solution. Having already helped cut Vodafone's media carbon footprint by a third, the company is well set for even greater success as it continues to grow.
Freddie
Company Specialist at Welcome to the Jungle
Insights
Company
Funding (1 round)
Apr 2024
$7.7m
SERIES A
Total funding: $7.7m
Company benefits
- VSOP: As a valued team member, you'll have the opportunity to join our VSOP pool, allowing you to share in the company's financial success
- 27 days of vacation: We offer 27 days of paid time off on top of national holidays, no matter where you are based
- Flexible working hours: Trust is the backbone of our culture, so you have the autonomy to set your own work hours. We recognize that work-life balance varies for each individual, so you are encouraged to adjust your schedule to suit your personal needs, whether that's spending time with family or focusing on your health and well-being
- Learning budget: You will have a budget of EUR 500 per year to allocate towards any learning and development activities of your choice. You have the freedom to select whatever you believe is best for your growth
- Work from home budget: You will receive a one-off payment of EUR 500 to purchase any equipment you need for your remote office. We provide you with a Mac
- Work from anywhere: We fully embrace remote work and its flexibility. However, we must adhere to the tax regulations specific to each country
- In-person Gatherings: There's nothing like in-person connections to boost team spirit. That's why we organize two types of gatherings: company-wide events twice a year and team-focused meetups twice a year
Company HQ
Prenzlauer Berg, Berlin, Germany
Leadership
Fabian Schwarzer
(Co-Founder & COO)Previously a Senior Consultant at Roland Berger.
Helen Tacke
(Co-Founder & CEO)Preciously a Partner at a family office investment fund. Also previously Co-founded VEECEE, a networking platform for Venture Capitalists.
Tiago Taveira
(Co-Founder & CTO)8+ years experience as a Full-Stack Developer and Product Manager prior starting Cozero.
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