Java SE / Java EE Engineer

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.

🚀Your role and 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 acomplex 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)

🧠 What we’re looking for

Must-have

• 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 withOSGiorEclipse desktop applications

🚀What we offer

• Health & sports benefitsadjusted to your needs

• Freerunning 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 🚀