Java Developer

• On-site work from Warsaw (5 days per week from the Client's office) 

• Full availability in the Polish time zone

• Polish language is required

• English: at least B2

Tasks

• Design and implementation of IT solutions based on analytical and technical documentation

• Review and improvement of analytical documentation

• Creation and maintenance of technical documentation

• Technical upgrades and modernization of an existing system (including migration to Java 17 and newer technologies like Spring Boot)

• Work with legacy code and monolithic architecture (Java 8-based system)

• Reverse engineering based on:

  • existing source code

  • functional and technical documentation

  • documented business processes

  • system UI and database access

• Participation in transformation of a monolithic TMS system (POS terminal management) towards microservices architecture

• Defining, designing and implementing automated test cases (including regression testing)

• Identification of areas for test automation based on code and documentation

• Work with system security improvements and vulnerability mitigation

• Close cooperation with operational and development teams (~50% analytical work / ~50% development)

• Working in Scrum (2-week sprints) in a small development team

• Supporting system evolution and rollout to new markets (e.g. Germany)

Requirements

• Very good knowledge of Java (8+) and object-oriented programming (experience with Java 17 is a plus)

• At least 5+ years of experience (Regular/Senior level)

• Experience in independent design, implementation, documentation and testing of application components

• Strong analytical skills and ability to work with legacy systems

Very good practical knowledge of:

• Spring / Spring Boot

• Hibernate / JPA

• JEE

• RESTful API design

• Relational databases (especially Oracle)

Practical experience with:

• Message queues (RabbitMQ)

• System integration and distributed systems

• Application servers (JBoss / WildFly)

• Development tools: Maven, Git, GitLab, GitLab CI/CD, Jenkins, Nexus, Jira

• Docker

Nice to have:

• Experience with Linux environments

• Knowledge of code scanning tools (Fortify, Sonatype)

• Experience with AI-supported development tools (Codex)

Offer

• Multisport card

• Private healthcare

• Access to an e-learning platform

• Group life insurance