Brussels (hybrid) Contract type: Permanent, full-time
Languages: French or Dutch native + good knowledge of the other national language + professional English
TMS Group is recruiting a Senior Java Developer for one of our clients — a major organisation running a large-scale digitalisation and automation program.
The environment is structured, mature, and technically ambitious: multiple teams, modern tooling, and a long-term roadmap where engineering quality matters.
You would join their Agile setup and play a key role in designing, building, and optimising new digital services across a complex and integrated IT landscape.
This is a place where seniority actually counts: you influence architecture, guide teammates, and help shape engineering practices.
As a Senior Java Developer, you will take full ownership of delivering high-quality software solutions while mentoring the team and guiding technical direction. Analysing system integrations and designing robust technical solutions.
Leading implementation of complex user stories and technical tasks with high quality and maintainability.
Coaching and supporting colleagues, helping them overcome technical challenges through peer programming, guidance, and reviews.
Defining and maintaining test strategies, supporting CI/CD pipelines and automated testing.
Collaborating with infrastructure teams to deploy solutions efficiently and reliably.
Documenting architecture, development standards, and solutions clearly for team use and future reference.
Taking ownership of major features / epics and coordinating across multiple teams to ensure alignment.
Extensive experience as a Java Developer at senior level.
Strong knowledge of Java, Quarkus, and containerised environments (Docker/Podman).
Solid SQL and database experience.
Test automation experience, preferably with Gherkin frameworks.
Experience with OpenShift, ArgoCD, and Agile/Scrum development practices.
Fluent in French or Dutch, with good understanding of the other national language.
Professional command of English.
Strong mentorship and leadership abilities — able to guide technical decisions and inspire the team.
Excellent communication skills for cross-team alignment and stakeholder collaboration.
Permanent contract with competitive salary aligned to experience.
We're a close-knit team where every consultant truly matters.
We listen, support, and help you evolve in missions where you can grow, learn, and make a real impact.
Simply follow the application process directly on LinkedIn — no need to send an email.
Once we've reviewed your profile, we'll get in touch to schedule a conversation — over coffee or via video call .