Implementation and maintenance of cross-product core services for all everii products
Extracting functionality from individual products and delivering them as standalone, reusable services
Active use of AI tools and agents to support development processes
Automated tests, code reviews, and continuous improvement of code quality and developer experience
Development and further development of REST and GraphQL APIs, including authentication (OAuth, JWT) and documentation (Swagger/OpenAPI)
Responsibility for stable and secure services, including monitoring (Grafana, Victoria Logs & Metrics) and troubleshooting across our CI/CD pipelines (GitHub Actions, Docker)
Creation and implementation of technical concepts and active exchange on architecture and solution approaches within the team
Close collaboration within the development team and technical discussions on architecture and solution approaches

Solid backend experience with ASP.NET Core (including Entity Framework Core, Hangfire)
Confident use of Git and IDEs such as Visual Studio, VS Code, or JetBrains Rider
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 Hangfire (.NET)
Knowledge of performance optimization and caching strategies
Comfortable and proactive use of AI tools and agents — AI is your best buddy
Routine with automated testing as well as GitHub Actions, Docker, and container-based deployment
Basic knowledge of working with Linux servers and container-based setups
Ideally, you have already contributed to a production SaaS product
Maintainable, well-considered code — no quick hacks, but pragmatic solutions
Enjoy discovering and experimenting with new technologies
Open-minded, team player, able to handle context switching
Clear communicator, able to give and solicit feedback and engage in constructive discussions
Very good German and English, spoken and written

Individual development: Room for independent work, scope 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 shared breakfast — 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

Senior Developer – .NET, C#

Key skills