Atmen is a Munich and Madrid-based RegTech startup revolutionising green certification. Our SaaS platform helps energy-intensive industries (fuels, chemicals, materials) automate compliance and certification - cutting down time by up to 90% . We replace today's manual, costly, and unpredictable certification processes with continuous, technology-driven verification . Making sustainable production simple, scalable, and cost-effective.
Atmen is a Munich and Madrid-based RegTech startup revolutionising green certification. Our SaaS platform helps energy-intensive industries (fuels, chemicals, materials) automate compliance and certification - cutting down time by up to 90% .
We replace today's manual, costly, and unpredictable certification processes with continuous, technology-driven verification . Making sustainable production simple, scalable, and cost-effective.
Tasks As a Senior Software Engineer , you will play a key role in shaping our product, working closely with our engineering and product teams to build robust, scalable, and maintainable software solutions. Develop, test, and deploy full-stack software solutions, ensuring high-quality, maintainable code.
Lead by example by writing clean, testable code and supporting engineering best practices.
Own features end-to-end —from architecture to implementation, deployment, and monitoring.
Improve performance, reliability, and scalability to ensure our platform meets enterprise-grade standards.




5+ years of professional experience in software development, preferably in full-stack roles.
~ Proficiency in TypeScript, React, Node.js, PostgreSQL, and AWS .
~ Strong software engineering principles : clean code, modularity, testing, and maintainability.
~ Excellent communication skills in English (both written and spoken).
~ Master’s degree or equivalent experience in Computer Science, Engineering, or a related field.

We encourage all qualified applicants to apply, even if you don't meet every single requirement.
Experience with Test-Driven Development (TDD) and end-to-end testing.
Experience with Quality Assurance (QA) workflows
Frontend : React, TypeScript
Backend : Nest.js (Node.js, TypeScript)
Testing : Cypress, Jest
Infrastructure : AWS (AWS CDK)
Nx, GitLab CI
We value drive, ability to learn fast and general understanding of software development over specific tool knowledge.
Full-Time
Valid working permit in Spain - this position is for our Madrid location.
Fluency in English
We minimise unnecessary meetings and document everything in Notion .
Meetings-free mornings + 1 in-office Team Day per week.
Fast-paced, iterative development : Strong testing culture : Pragmatic test-driven development (TDD), heavy use of E2E tests.
Hybrid work and central Munich offices: work from the office and from home.
~ Growth: Join an early-stage startup with significant ownership and career growth potential.
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📌 Senior Software Engineer - C#, Javascript (Madrid)
🏢 Atmen
📍 Madrid