Senior Software Engineer (f/m/d)

You will be part of a collaborative, agile team, working closely with backend and frontend engineers as well as cross-functional stakeholders to deliver reliable and scalable solutions.

• Build, maintain, and evolve backend services using Kotlin/Java and Spring Boot, including taking ownership of existing systems and driving their continuous improvement (maintenance, refactoring, modernization).
• Design and develop robust REST APIs, ensuring proper versioning, documentation, and seamless integration with multiple clients and services.
• Work with relational databases (e.g., MySQL) and ORM frameworks (JPA/Hibernate), handling schema evolution and performance considerations.
• Ensure high code quality through automated testing, code reviews, and strong engineering practices, while contributing to the full CI/CD lifecycle (build, deployment, configuration, and operations in AWS).
• Collaborate closely within the team, support and mentor junior developers, and actively contribute to knowledge sharing and continuous improvement.

• 5+ years of experience in backend web development, with strong hands-on expertise in Kotlin and/or Java with Spring Boot in production environments.
• Proven ability to work with and evolve existing systems, combined with solid experience in API design (REST), system integration, and working with relational databases and ORMs (e.g., MySQL, JPA/Hibernate).
• Experience writing testable code, implementing automated tests, and working with CI/CD pipelines as well as deploying and operating services in AWS.
• Strong engineering mindset with a focus on clean code, code reviews, and pragmatic documentation, paired with a collaborative, team-oriented approach and mentoring experience.
• Fluent English and the ability to work effectively in an agile, cross-functional environment.

• Basic frontend knowledge (React & TypeScript) and willingness to contribute occasionally (e.g., bug fixes, small features).
• Experience running services on AWS ECS, including request-triggered or task-based workloads.
• Familiarity with Python for internal tools, scripts, or lightweight services.
• Experience working across multiple services and clients.
• Interest in AI and actively using it as a tool in your daily work.
• Experience with event-driven architectures or messaging systems (e.g., Kafka).
• Background in B2B and/or SaaS environments.
• German language skills.

• Mobile & flexible working.
• Corporate benefits program.
• 15 € subsidy for your Deutschland Ticket (Germany-wide public transport ticket).
• Subsidy for EGYM Wellpass (fitness, sports & wellness).
• Last, but not least, you will find your purpose by developing the next generation health systems!