Atmen is a Munich-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 Germany 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.

📌 Software Engineer - C#, .NET, JavaScript (Madrid)
🏢 Atmen Solutions
📍 Madrid