Munich, Germany Hybrid Freelance

Atmen is hiring a Freelance Software Engineer (Full Stack: Node.js, React, TypeScript)

Responsibilities

  • Design and maintain full-stack applications using Node.js, React, TypeScript, NestJS, and PostgreSQL.
  • Build and support integrations with external APIs using REST and related web service technologies.
  • Customize and extend the core platform to meet specific customer business needs.
  • Create clean, scalable, and maintainable backend services and frontend interfaces.
  • Work closely with clients and internal teams to define integration requirements and develop technical solutions.
  • Diagnose and resolve integration issues across distributed systems, coordinating with third-party vendors when needed.
  • Develop reliable, secure, and high-performing code with thorough testing practices.
  • Engage in code reviews, architectural planning, and ongoing development process improvements.
  • Support documentation for APIs, integrations, and internal development workflows.

Work Arrangement

Hybrid — Munich

Team

Small, high-performing team focused on sustainability and innovation in green certification.

About Atmen

Munich-based RegTech startup transforming green certification. The SaaS platform enables energy-intensive sectors like fuels, chemicals, and materials to automate compliance and certification, reducing processing time by up to 90%. The platform replaces manual, error-prone processes with continuous, technology-driven validation. Mission is to make sustainable production scalable, simple, and affordable.

How we work

Asynchronous communication is prioritized; meetings are minimized and all documentation is maintained in Notion. Team members enjoy focused work mornings and one weekly in-office day. Development is fast and iterative, with frequent commits to main and multiple weekly releases. Testing is central, with pragmatic test-driven development and extensive end-to-end test coverage.

Why Join Us?

Work in a small, high-impact team driving sustainability in industrial sectors. Benefit from hybrid work flexibility with access to central Munich offices. Opportunity for significant ownership and career growth in an early-stage startup. Tackle challenging problems in automation, AI, and compliance technology using modern tools and practices.

Meet the Team

Founded by Flore, Quentin, and Erika, who bring 15 years of combined experience in renewable energy, data analytics, energy markets, regulation, and product design. The team shares a strong commitment to decarbonizing industry and believes success is rooted in people. Driven by a passion for solving large-scale problems and continuously improving standards.

Atmen is an equal opportunity employer

Diversity is valued and actively supported. The company is dedicated to building an inclusive workplace for all employees and partners. Hiring is open to all, regardless of age, color, national origin, religion, gender, or other personal characteristics.

Other

  • Position is for a full-time freelancer.
  • Applicants should be based in the European Union.
  • Proficiency in English is required.
  • Work model is hybrid: remote with one mandatory in-office team day per week in Munich.
About company
Atmen

Atmen automates and derisks certification workflows across renewable fuels, from real-time supply chain data to auditable product claims. The platform brings clarity and control to certification journeys for green hydrogen, e-methane, ammonia, biomethane, HVO, and SAF.

Atmen combines frontier technology with deep regulatory expertise to help companies stay ahead in a fast-moving certification landscape. It serves as the data and certification backbone for decarbonized supply chains, enabling continuous compliance and streamlining sustainability certification workflows at scale and across borders.

The platform helps manage audit preparation, collect documents, reconcile data, and generate audit-ready reports. It supports verification of product attributes across complex supply chains, turning compliance into a competitive edge.

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Job Details
Department Software Development
Category Full-Stack
Posted 20 days ago