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Who we are Rockstardevelopers, founded in Mannheim in 2015, additional offices in Stuttgart and Munich. We are a software developer with experience from hundreds of individual projects for enterprise and medium-sized customers. Short channels, honest feedback, no political games.
No hierarchy levels between you and the people making decisions. Your tasks You will work on customer projects at large companies and public clients, embedded in their teams, with full responsibility for your area. Conception, development and testing of microservices in the Java environment API development: REST and SOAP, synchronous and asynchronous, specification with OpenAPI 3 Process automation with Camunda BPM Test automation with JUnit 5 and Cucumber Operation of your own services: deployment, monitoring, error analysis Help shape the architecture, not just implement it Generate, review and refactor code with Claude Code, Copilot or Cursor Coordination with interface partners across team boundaries Most come in up to two days a week in one of the offices.
But it's not a compulsion. You will only be on site with the customer for individual appointments every few weeks. First of all, be honest: on-call duty is part of it.
In some of these projects, you will also manage the services you develop in the company - including regular on-call duty. This is regulated and shared within the team. Where you end up Depending on the project and your experience: Large corporations such as Deutsche Bahn / DB Systel (railway-specific domains: timetable management, sales, control and safety technology) Public sector / authorities (e.g.
Federal Employment Agency, ITZBund, Federal Printing Office) - regulated environments, accessibility, security by design Enterprise and medium-sized customers from a wide range of industries Experience in one of these environments is a strong plus - tell us where you come from in the questions. What you bring senior level. Our customers need people who deliver and work independently from day one.
Backend core (that's what we expect): Java and Spring Boot, plus Spring Data and Hibernate/JPA Microservices: conception, development, testing REST and SOAP web services (JSON/XML over HTTP), OpenAPI 3 PostgreSQL and Oracle JUnit 5 and Cucumber Docker and Kubernetes CI/CD with GitLab Pipelines, build with Maven Git, Jira, Confluence, agile working What sets you apart: Camunda BPM from real projects, not from a tutorial OAuth 2.0 and Keycloak for authentication and authorization Advantageous (not a must): Apache Kafka and asynchronous communication XML, XSD, XSLT Experience in complex projects with several teams involved J2EE legacy and its migration to Spring Boot Language: German as a native language or at C1/C2 level, English fluent. You coordinate with departments and interface partners on a daily basis. You don't have to be able to do everything.
What is important is the Java core and that you can quickly find your way into new stacks. AI tools are mandatory, not a bonus Claude Code, Copilot, Cursor: You have to be able to work productively with them. Not because we want to be hip, but because our customers expect it and that's how we work.
If you think AI tools are hype and prefer to type everything yourself: wrong company. Internally, we invest in your AI skills. What we offer Home office, office or mix, you decide MacBook (unless the customer provides their own hardware) Different customers, different projects The founders are your direct contacts Internal upskilling in AI development Application CV is enough.
No cover letter necessary. After a short video question round (2x90 seconds), we will get back to you within a few days. Find Jobs in Germany on Arbeitnow
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