Senior Java Developer – Freelance & Employees
Are you a passionate
Senior Java Developer
ready to dive into complex systems, microservices, and modern architectures?
Join a
dynamic international tech team
working on cutting-edge digital payment and card solutions – where innovation meets impact.
About The Project
You'll join an
agile product team (7 developers)
working on a major platform built around a
central Java 8 application
and a growing ecosystem of
microservices
.
Your mission: help evolve this core system, build new features, integrate with new group-wide products, and shape the future of the platform.
This is a
key technical role
where you'll touch both
development
and
infrastructure
, collaborating closely with architects, DevOps, and product experts.
Your Responsibilities
* Design, develop, and maintain robust backend services and APIs.
* Contribute to both new features and modernization of legacy components.
* Integrate complex systems across the group's technology landscape.
* Troubleshoot, resolve incidents, and continuously improve system reliability.
* Collaborate within a cross-functional Scrum team and share best practices.
* Be proactive – propose ideas, challenge solutions, and drive innovation.
Your Tech Stack
We're Looking For Someone Comfortable With
* Java 8+ and modern Java versions/frameworks (Spring, Spring Boot)
* Maven, Hibernate, SQL
* GitLab and Azure DevOps (branching, CI/CD, code reviews)
* Microservices architecture, ideally with CQRS and AKS (Azure Kubernetes Services)
* Kotlin experience is a strong plus
You'll Fit Right In If You…
* Adapt quickly and love solving complex technical puzzles
* Communicate clearly and collaborate across teams
* Thrive in fast-moving environments with evolving priorities
* Are proactive, curious, and eager to make an impact
* Enjoy being a driver of change, not just an executor
Practical Info
* Location: Brussels (near a Station)
* Remote: 2 days onsite per week (flexible)
* Start Date: ASAP
* Contract: Freelance or Temp-to-Perm
* Language: French (team), English (mandatory)
* Duration: Renewable yearly
* Interview Process:
* 1 Interview + short technical assessment
* Fast feedback & decision
Why Join?
Cutting-edge Java + microservices environment
Collaborative, agile, and innovative culture
Hybrid working model with flexibility
Long-term project with evolution potential
Be part of a technically challenging, high-impact ecosystem
Apply Now