Sunhat is the Collaborative Proof Platform. We address the "Proof Gap" in compliance and sustainability reporting - centralizing scattered data into a verified proof library that enables organizations to streamline evidence collection and verification.
Our team of software, sustainability, and compliance experts has built an all-in-one platform to help companies automate and scale their sustainability programs, meeting both external requirements and each company's own standards.
Backend Engineer (f/d/m)
Köln HQ, Berlin HQ, Remote
Full-time
Permanent employee
Your role
Your mission
- Build and extend the APIs and data pipelines that power our Collaborative Proof Platform — ingesting compliance evidence, orchestrating verification workflows, and serving our proof library
- Design database schemas and optimize queries for our growing corpus of sustainability data
- Own features end-to-end: from technical design through deployment and monitoring
- Collaborate with product and sustainability specialists to translate compliance requirements into reliable backend systems
- Participate in code reviews and help shape our backend architecture
Your profile
- Practical backend experience with TypeScript in production systems
- Active use of AI-assisted programming tools (Copilot, Claude, Cursor) in your workflow
- Experience designing and maintaining REST APIs
- Database expertise, ideally with PostgreSQL (schema design, query optimization)
- CI/CD expertise, preferably GitHub
- Collaborative mindset emphasizing code quality and pair programming
- Fluent English communication skills
Benefits
- Flexible and Remote Work: You have the option to work fully remote within Germany. Alternatively, our offices in Cologne, Berlin, and Hamburg are always open to you.
- Competitive Salary & Equity: We offer a competitive salary package along with options for company equity.
- Family-Friendly Environment: We offer high flexibility to support your work-life balance.
- Top Equipment & Tools: You'll receive state-of-the-art technological equipment.
- Continuous Learning: You'll benefit from a professional development budget for courses, conferences, and more.
- Monthly Feel Good Budget: A €50 benefit that you can flexibly use for shopping vouchers or a membership with Urban Sports Club.
Ready to make an impact
Interested in the role but not sure if you meet 100% of the requirements? Apply anyway! We aren’t looking for perfect resumes, but for people with potential and a genuine passion for our mission.
As an equal opportunity employer, we encourage applications from individuals of all backgrounds, regardless of their personal history or identity.
About us
Sunhat was founded to transform how companies manage and share sustainability data with both internal teams and external stakeholders. We believe technology is essential in closing the gap between rising ESG demands and the ability to deliver trustworthy, audit-ready proof.
By streamlining every step — from mapping requirements to preparing and maintaining documentation — Sunhat empowers sustainability teams to work faster, stay compliant, and strengthen stakeholder trust with reliable, verifiable information.
We are funded by world-class investors and are proud to support mission-driven companies all over the world in taking their sustainability program to the next level. Join us in revolutionizing the way companies exchange sustainability information
By streamlining every step — from mapping requirements to preparing and maintaining documentation — Sunhat empowers sustainability teams to work faster, stay compliant, and strengthen stakeholder trust with reliable, verifiable information.
We are funded by world-class investors and are proud to support mission-driven companies all over the world in taking their sustainability program to the next level. Join us in revolutionizing the way companies exchange sustainability information