Software Engineer (Java) - (m/f/d)

What your work will look like:

• Design, build, test, and operate cloud-based microservices (Java/Spring Boot, Kafka)
• Write automated tests (unit, integration, and end-to-end) as an integral part of your daily work
• Contribute to product design by writing technical specifications – clear enough to guide both engineers and AI agents
• Use AI-assisted development (coding agents, AI code review, spec-driven workflows) in your daily work and help us evolve how we use it
• Work with the Unzer Tech standards and processes and help us improve them
• Be actively involved in team and organizational knowledge-sharing

What you need to be successful in this role:

• 5+ years of experience with Java 21+ and Spring Boot
• Solid knowledge of data structures, algorithms, operating systems and distributed systems
• Experience with SQL databases (schema design, migrations); NoSQL is a plus
• Experience with microservices, event-driven messaging (Kafka, Avro) and Git-based workflows (feature branches, pull requests, code review)
• You diligently test (ideally test-first/TDD) and document your deliveries
• Experience in architecture design (e.g. Domain-Driven Design) and common design patterns
• Experience with observability tools such as Coralogix or OpenTelemetry
• Hands-on experience with AI coding assistants/agents (e.g. Claude Code, GitHub Copilot): you use them productively and critically review, test and own the code they produce
• Hands-on mentality

Nice to have:

• Frontend experience with Angular
• Know-how in delivering software to the AWS cloud platform
• Experience with Docker, Kubernetes and GitOps (e.g. Argo CD)
• Experience building agentic workflows (MCP integrations, custom agent skills, AI steps in CI such as automated PR review)
• Experience in regulated environments (payments, PCI-DSS, GDPR)