Senior Fullstack Engineer; m​/f​/d

Senior Fullstack Engineer (M/F/D)

You are a Senior Fullstack Engineer (m/f/d) with in-depth frontend knowledge driving the end-to-end development of our online services. While your primary focus is delivering high-performance web-based interfaces, you possess the technical depth to navigate our backend and mobile ecosystem end-to-end. You'll maintain architectural oversight across the entire solution, collaborating with team members to engineer holistic technical solutions that translate into global well-being.

Are you excited to build interfaces that impact millions of users? Then apply now as Senior Fullstack Engineer (m/f/d) for our teams in Berlin.

• Feature Ownership:
  You will lead the development of customer-facing features, guiding them from initial concept and UX testing to full implementation

• Operational Excellence:
  You will facilitate engineering best practices within our monorepo setup and participate in our Communities of Practice to drive platform wellness and technical ownership across the organization

• Technical Leadership:
  You will provide direction to the team, helping define the technical roadmap, system architecture, and development processes

• AI-Enhanced Workflow:
  You will leverage AI-assisted coding tools to accelerate development, improve code consistency, and focus on solving high-level architectural challenges

• Frontend Excellence:
  You will create complex user interfaces with a deep focus on interaction design, clean code and testability using industry best practices

• Cross-Functional Collaboration:
  
  You will communicate effectively across teams to unblock challenges and design scalable solutions that work across the entire EGYM ecosystem

• Frontend Mastery:
  You have at least 7 years of hands-on experience in frontend development and operating professional web services

• Web Expert:
  You possess advanced knowledge of Type Script, React, and are comfortable solving complex UI challenges

• State & API Management:
  You are experienced in integrating APIs and managing application state using Tan Stack Query, Jotai, or similar modern state managers

• Backend Literacy:
  You can comfortably read and reason about backend code in our stack (Java/Go), follow data flows across microservices, understand service boundaries and dependencies, navigate SQL database structures, and diagnose the root cause of issues

• Modern Tooling:
  You have experience working with design systems and a strong commitment to unit, integration, and end-to-end testing

• CI/CD & Dev Ops:
  You have a solid understanding of CI pipelines and the principles of end-to-end continuous delivery

• Bonus Points:
  
  You have experience with web-to-native bridges like Ionic, Capacitor, or React Native is a big plus

• Ownership:
  You take full ownership of your work, understanding its architecture and delivering on product requirements while improving testability

• Ecosystem Integration:
  You become familiar with the EGYM ecosystem and the roles of various teams within the software engineering department

• Codebase Proficiency:
  You contribute effectively and confidently to our shared codebase

• Modern Tech Stack & AI Evolution:
  We don't just maintain; we evolve. Explore our Tech Radar to see our stack, and join us in building an AI-agentic, iterative, and incremental product culture where AI is a core accelerator of our development lifecycle

• Learning Time:
  Use 10% of your time on learning topics of your choice (conferences, hackathons, internal and external events, videos, books or innovation projects)

• Continuous Development:
  Develop your skills with varied, challenging tasks and regular feedback to benefit from a steep learning curve

• Dynamic & International:
  Be part of a motivated, ambitious and international team that uses English as a working language - get some team insights

• Work-Life-Balance:
  Enjoy a hybrid workplace model, lots of flexibility and 30 days of vacation

• Fit & Healthy:
  Train for free with EGYM Wellpass in several thousand sports and health facilities across Germany and/or use our in-house gym with EGYM products

• Flex Budget:
  Use €60 per month flexibly for public transportation and a meal subsidy

• Mentoring Program:
  Exchange knowledge and grow together across teams and locations through our self-organized mentoring platform

• Discounts:
  Get a variety of great discounted offers, from fashion to leisure, through our employee benefits portal

• Bike Leasing:
  Stay active and use our leasing bike offer for your way to work or in your spare time

• Subsidized Pension:
  Profit from our employer-subsidized pension