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Java Backend Developer

Warszawa, mazowieckie💼 Full-time🗓 2026-06-09 → 2026-08-08

Core

Design, development, and maintenance of server-side Java EE components for core software products.

Role type

Java Backend Developer

Builds

Server-side components, RESTful web services, and microservices

Domain

Enterprise software development

Deliverable

production ML models | product features

Required skills

Java EE, JAX-RS, JPA, JAXB, CDI, Maven, XML/JSON manipulation, JVM internals tuning, Git, CI/CD (Jenkins), SQL, relational DBMS (Db2, SQL Server, Oracle), NoSQL (MongoDB, Cassandra), Elasticsearch

Preferred skills

SOLID principles, enterprise design patterns, distributed architectures (SOA, microservices)

Technologies

JAX-RS, JPA, JAXB, CDI, Maven, Git, Jenkins, Db2, SQL Server, Oracle, MongoDB, Cassandra, Elasticsearch

Responsibilities

Design and develop server-side components in Java EE; execute functional and integration tests; optimize and refactor technical solutions; update technical documentation; apply security best practices

Seniority

Mid-level, hands-on IC

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