Senior Backend Engineer

• 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, * A free Urban Sports Club M 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 €1,000 annual training budget
• Four-legged colleagues are welcome in our pet-friendly office!

Do you have experience in Web development?, * 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

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., 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.