Senior Backend Engineer (mfd)

Your Impact

As a Senior Backend Engineer (m/f/d) at 7Mind you'll be part of a cross-functional team building technology that supports mental wellbeing at scale. You work end-to-end on features, take ownership of backend services and help shape a system that is reliable, maintainable and a pleasure to work with.

In 2025 we fully rewrote and relaunched the 7Mind app and backend. Our new platform follows Domain-Driven Design principles and deliberately focuses on delightfully boring solutions: simple, robust and built to last.

7Mind is part of the 7NXT Health Group (BuddyFit Gymondo) bringing together strong engineering culture and a clear purpose: empowering people to live healthier lives.

Your Mission

• Build and evolve backend features end-to-end: from concept and implementation to deployment and monitoring
• Write clean, testable and maintainable code with a strong focus on long-term quality
• Maintain and improve integrations with third-party services
• Ensure a stable observable and scalable backend in a B2C environment
• Take and share ownership of your services and share responsibility for the overall system
• Discuss trade-offs openly with product design and other stakeholders
• Contribute to a strong engineering culture through code reviews, documentation and knowledge sharing

Our Tech-Stack

We use modern, well-proven tools and value pragmatic choices over unnecessary complexity:

• Elixir (with Phoenix Broadway)
• Kubernetes, PostgreSQL, Google PubSub, OpenTelemetry, Terraform
• Github, Github Actions, Linear, DataDog, Google Cloud, Cloudflare

Your Story

• 5 years of professional experience in software engineering with a strong focus on backend development
• Proficiency in Elixir or any other modern backend language paired with a strong interest in mastering Elixir
• Solid understanding of web fundamentals (HTTP, REST, caching, cookies, WebSockets, asset loading)
• Hands-on experience with CI/CD pipelines and cloud-based deployments
• A strong sense for clean architecture, maintainable and testable code
• Product mindset: you balance technical excellence with user value and business impact
• Clear communication and documentation skills in English

Nice to Have:

• Experience or interest in mobile or web development
• Kubernetes configuration or administration
• Linux system administration
• RDBMS / SQL
• Experience with Golang, Kotlin or Dart
• Familiarity with Google Cloud or AWS

Our Benefits - Just for You

Success requires positive energy. That is why we ensure the right conditions are in place – physically, mentally and within the team:

• 30 days of vacation per year
• 2 additional days off: December 24 (Christmas Eve) and December 31 (New Year's Eve) are officially recognized as paid holidays
• Hybrid working model (3 days in the office, 2 days working from home)
• 4 weeks of work from abroad per year
• A free Urban Sports Club membership & access to Nilo Health for mental health and personal development
• Free access to our digital wellbeing products (7Mind & Gymondo)
• Monthly mobility budget of 30 via Navit
• Family-friendly benefits: childcare costs & sick days for children
• The office classics: fruit & vegetable basket, muesli & yogurt (also vegan), drinks & snacks
• A wide range of opportunities for personal growth and development – including a 1000 annual training budget
• Four-legged colleagues are welcome in our pet-friendly office

Come as you are

We welcome what makes you unique. At 7NXT, Gymondo and 7Mind we believe in diversity, openness and team spirit. No matter which gender you identify with, whether you have a disability, what your neurotype is, where you come from, what you believe in or how you love – you are welcome here.

Don’t meet all the criteria? No problem. If you would like to shape the future of health & well-being with us we look forward to receiving your application.

If you need a more accessible application process or have questions about the procedure, write to us and we'll find a way.

About us

At 7NXT we live up to our promise: We empower people to lead a fit and healthy life.

Gymondo & BuddyFit (digital fitness), 7Mind (mental health) and 7NXT Brand Solutions (publishing, retail, TV) help millions of people live healthier lives physically and mentally.

We believe in trust rather than rigid structures. We give each other support and freedom to grow, learn from each other and ask questions that help us move forward. For us, working smart means working cleverly rather than endlessly. And we never lose sight of what really matters: the people we do it all for. Their progress is what drives us. For us responsibility doesn’t end at the office door: sustainability, inclusion and diversity aren’t buzzwords – they’re part of our everyday life.

Required Experience: Senior IC

Key Skills: Laboratory Experience, Vendor Management, Design Controls, C/C++, FDA Regulations, Intellectual Property Law, ISO 13485, Research Experience, SolidWorks, Research & Development, Internet Of Things, Product Development

Employment Type : Full-Time

Experience: years

Vacancy: 1