everii Group

Senior Developer – Ruby on Rails

everii Group

full-time

Posted on:

Location Type: Hybrid

Location: Hamburg • Germany

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Job Level

Senior

Tech Stack

DockerGraphQLLinuxPostgresRubyRuby on RailsSQLSwitching

About the role

  • Service development: Implementation and maintenance of core services that are used across all everii products.
  • Service encapsulation: Extracting functionality from individual products and providing it as standalone, reusable services.
  • AI & Innovation: Active use of AI tools and agents to support development processes.
  • Quality & Testing: Automated tests, code reviews and continuous improvement of code quality and developer experience.
  • APIs & Integrations: Development and further enhancement of REST and GraphQL APIs.
  • Operations & Monitoring: Responsibility for stable and secure services, including monitoring and troubleshooting across our CI/CD pipelines.
  • Technical design: Creating and implementing technical concepts as well as actively discussing architecture and solution approaches within the team.
  • Collaboration: Close collaboration within the development team.

Requirements

  • Solid backend experience with Ruby on Rails (including Sidekiq)
  • Confident with Git and IDEs such as RubyMine and VS Code
  • Experience with PostgreSQL, MS SQL or other relational databases
  • Experience with REST and GraphQL APIs as well as API authentication (OAuth, JWT) and documentation (Swagger/OpenAPI)
  • Experience with Sidekiq (Ruby)
  • Knowledge of performance optimization and caching strategies
  • Comfortable and confident using AI tools and agents
  • Familiarity with automated testing as well as GitHub Actions, Docker and container-based deployments
  • Basic knowledge of Linux servers and container-based setups
  • Ideally, you have already contributed to a production SaaS product
  • Maintainable, well-thought-out code — no hacky fixes, but with healthy pragmatism
  • Enjoy discovering and trying out new technologies
  • Open-minded, team player, able to handle context switching
  • Clear communicator: give and solicit feedback, and conduct constructive discussions
  • Very good German and English, spoken and written
Benefits
  • Individual development: Room for autonomous work, freedom to shape your role and continuous learning
  • Smart work: Modern technical equipment, hybrid working model and trust-based working hours
  • Feel-good atmosphere: Fresh fruit, coffee, chilled drinks and a weekly communal breakfast — located in the heart of Hamburg or Frankfurt
  • Tech stack & team: Modern tools and technologies in a product-focused team with short decision-making paths
  • Stability: Permanent full-time position, start possible immediately
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
Ruby on RailsSidekiqPostgreSQLMS SQLREST APIsGraphQL APIsAPI authenticationautomated testingperformance optimizationcaching strategies
Soft Skills
team playerclear communicatoropen-mindedcontext switchingcollaboration