Senior Software Engineer, Cozero
+ VSOP
Carbon accounting & climate management solution
Open for applications
Carbon accounting & climate management solution
21-100 employees
Open for applications
+ VSOP
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 5+ years of experience in software engineering
- Have experience with data-intensive backend systems in B2B SaaS
- Are a strong backend engineer fluent in TypeScript/Node.js, experienced with NestJS or similar frameworks; solid with PostgreSQL and comfortable navigating a React frontend when needed
- Have worked on complex product domains - contributing to architectural decisions and understanding how different parts of the system interact
- Care about data correctness - you've built systems where wrong output is worse than no output, and you think naturally about validation, idempotency, and edge cases
- Ship small and often - you're uncomfortable when PRs sit for days and you treat "in production" as the only definition of done
- Have a DevOps mindset - you take responsibility for the components you build, from technical design to release, monitoring, and maintainability
- Debug across layers - when something's wrong, you trace it end-to-end rather than pointing at someone else's service
- Write clear technical documentation that other engineers actually use
- Familiarity with AWS (ECS, Lambda, SQS, Aurora)
Desirable
- Experience with data ingestion pipelines, or analytics tooling (Cube.js, Snowflake)
- Exposure to climate tech, sustainability, or compliance-grade data systems
- Experience improving or incrementally modernizing legacy systems
- Startup experience (Series A/B stage)
What the job involves
- We are looking for a Senior Software Engineer who will play a key role in shaping and building a core product domain within our carbon accounting platform, working on complex backend systems that ingest, validate, and process large volumes of data
- This is a highly hands-on role where you will collaborate closely with other engineers on architecture decisions, design reliable systems and deliver features in fast iterations
- You’ll work across the full lifecycle of your systems: from design and implementation to deployment and monitoring in a team that values pragmatism, ownership, and shipping impact to production
- Contribute to the development of a core product domain: collaborating on architecture decisions, feature delivery, reliability, and operational health for your area of the platform
- Design and build data validation and processing capabilities: helping ensure customers can trust the numbers they see
- Ship features in fast iterations: break down projects into small deliverables, write technical documentation, and deliver them to production
- Contribute to technical discovery for your projects: shaping implementation approaches, testing strategies, rollout plans, and identifying risks, in collaboration with peers
- Take responsibility for what you build in production: supporting deployment, monitoring, and incident response
Our take
Climate change and conflicts continue to challenge 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. 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 advancing 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
$7.6m
SERIES A
Total funding: $7.6m
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.
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