Senior Software Engineer (Full Stack)

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.

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 fitness centres

Atmen is an equal opportunity employer

We embrace diversity and are committed to creating an inclusive environment for all employees and stakeholders. We are open to all candidates without regard to age, color, national origin, religion, gender or any other characteristics.