Senior Software Engineer

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. Our mission? 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. You will:

• Develop, test, and deploy full-stack software solutions, ensuring high-quality, maintainable code.
• Drive development from ideation to production, working closely with designers, engineers, and product managers.
• 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.
• Mentor and collaborate with team members, fostering a culture of continuous learning and growth.
• Improve performance, reliability, and scalability to ensure our platform meets enterprise-grade standards.

Requirements

🏆 Must-haves

• 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.
• Experience designing and maintaining scalable, distributed systems.
• Self-motivated and able to navigate a fast-changing startup environment.
• 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.

🙏 Nice-to-haves

• Experience with Test-Driven Development (TDD) and end-to-end testing.
• Experience with Quality Assurance (QA) workflows
• Exposure to one of: AI/ML, GenAI integrations, Security
• Related domain expertise: energy, certification, sustainability, or regulated industries.
• Experience working in a fast-paced startup environment.

💻 Our core technologies

• Frontend: React, TypeScript
• Backend: Nest.js (Node.js, TypeScript)
• Testing: Cypress, Jest
• Infrastructure: AWS (AWS CDK)
• Nx, GitLab CI

⁉️ Not your stack? We value drive, ability to learn fast and general understanding of software development over specific tool knowledge.

☑️ Job requirements

• Availability: Full-Time
• Valid working permit in Spain - this position is for our Madrid location.
• Fluency in English

Benefits

🛠️ How we work

• Asynchronous first: We minimise unnecessary meetings and document everything in Notion.
• Focus time & deep work: Meetings-free mornings + 1 in-office Team Day per week.
• Fast-paced, iterative development: We push to main frequently and release several times per week.
• Strong testing culture: Pragmatic test-driven development (TDD), heavy use of E2E tests.

🤫 Why Join Us?

• 🚀 Impact: Be part of a small, high-performing team driving real-world sustainability impact.
• 🔀 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.
• 🦾 Cutting-edge tech: Work on exciting challenges in automation, AI, and compliance tech.
• 🏄🏻‍♀️ “Well Pass” as an employee benefit - giving you unlimited access to most f