Java SE / Java EE Engineer

Role Summary

B3 Consulting Poland is a Polish outsourcing company with Scandinavian roots, built on logic, experience and pragmatic thinking .

We work in a Scandinavian-style culture that values trust, responsibility and long-term cooperation.

Our CARE philosophy guides how we work with both customers and colleagues – we focus on understanding real needs, adapting solutions wisely and taking ownership of what we deliver.

At B3, you’ll find more than just projects. You’ll join a team of engaged, supportive people who value quality, collaboration and technical depth 🙌

We’re currently expanding our digital innovation center in Poland and are looking for a Java SE / Java EE Engineer to join us.

Responsibilities

In this role, you will work on a large-scale Java system , focusing on stability, quality and long-term maintainability.

You will

• Develop and maintain a complex Java application
• Enhance existing functionalities and extend the system with new business contexts
• Refactor legacy code to build shared, reusable solutions
• Implement new features mainly in Java SE , with occasional Java EE development
• Integrate applications with databases
• Take responsibility for code quality and testing ( create and maintain unit tests; contribute to integration tests)

Requirements

• Commercial experience with Java SE (Java 17) in a large codebase
• Experience with Java EE / J2EE (WildFly, Hibernate)
• Database experience ( PostgreSQL or Oracle )
• Unit testing experience ( JUnit and/or Selenium )
• Ability to read, understand and refactor existing code
• English and Polish level B2+
• Residence in Poland and eligibility to work here

Nice to have

• Basic knowledge of JavaScript (React)
• Experience with REST / Web Services (building or consuming APIs)
• Familiarity with OSGi or Eclipse desktop applications

Benefits

• Health & sports benefits adjusted to your needs
• Free running and swimming trainings (Warsaw)
• Internal triathlon team and joint sports competitions
• Individual development paths to deepen your technical expertise
• Cyclical initiatives supporting growth in other IT domains , beyond your main stack
• Apply today and grow with B3 🚀