Senior Java Backend Engineer

Who we are

 

We are looking for a Senior Java Backend Engineer to join a high-impact EU digital initiative - the Once-Only Technical System.

You will contribute to the development of the Semantic Repository application, designing and building scalable backend services in a modern microservices environment.
Tech stack: Java 17/21, Spring Boot 3.x, PostgreSQL, JOOQ, Flyway, Docker, Kubernetes, Helm, Maven, Swagger, JUnit/Mockito

 

What you’ll be doing:

 

• Design and implement scalable microservices and REST APIs
• Contribute to system architecture and technical decisions
• Manage DB migrations (Flyway) and data layers (PostgreSQL + JOOQ)
• Support containerized deployments (Docker/K8s)
• Ensure high code quality through testing and reviews
• Collaborate closely with Product Owner and cross-functional teams

 

What you'll bring along

 

• Bachelor’s degree in Informatics/ or similar field of study/or equivalent working experience is required
• A minimum 5-7 years demonstrable experience in a similar role is required
• Required experience in working with Java 17, SpringBoot and Spring ecosystem
• Knowledge of PostgreSQL, jOOQ for SQL‑centric data access, Flyway for schema versioning and migrations
• Experience with Maven, Swagger, OpenAPI, JUnit and Mockito
• Knowledge of Docker, Kubernetes and Helm is nice to have
• Experience with projects with end-customer focus  
• Well-structured and organized working methodology
• Excellent English verbal and written skills