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
