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November 4, 2026
Senior Java Developer
Senior • On-site
150 - 165 PLN/yr
Warsaw, Poland
Quick Facts
Role: Senior Java Developer (Contract)
Description
You will build and maintain scalable backend services and RESTful APIs in Java (Spring Boot) that power client-facing portal applications. You will model data and integrate with relational and NoSQL databases, coordinate API contracts with front-end developers, and deploy services in containerized environments. The role includes secure coding, unit/integration testing, CI/CD contributions, continuous improvement of performance and reliability, and production issue investigation with on-call/support rotations as needed.
Responsibilities
Build and maintain scalable Java backend services and RESTful APIs (Spring Boot)
Model data and integrate with relational and NoSQL databases
Collaborate with front-end developers on API contracts and seamless integration
Deploy and run services in Docker/Kubernetes/OpenShift environments
Apply secure coding practices, write unit and integration tests, and contribute to CI/CD pipelines
Improve performance, scalability, and reliability
Investigate and fix production issues, including on-call/support rotations
Participate in Agile ceremonies, sprint planning, and technical design discussions
Requirements
7+ years of backend development experience with deep expertise in Java
Hands-on Spring Boot experience
Experience designing and consuming REST APIs
Container and orchestration experience (Docker/Kubernetes/OpenShift)
Solid SQL skills (relational data modeling and query optimization)
Familiarity with CI/CD pipelines and automated testing practices
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