Join a cutting-edge team focused on transforming a crucial application landscape, where your skills will directly contribute to operational excellence in the defense sector. We are seeking a dedicated and skilled professional who is ready to embrace complex challenges and deliver innovative solutions.
You will join an internal software delivery team responsible for maintaining, modernising, and extending a portfolio of business-critical applications.Your work includes taking over existing applications, re-engineering or rewriting them to align with current development standards, and delivering new features.
You operate in a complex, multi-application environment and contribute to both backend and frontend development.
Your responsibilities include
* Taking over existing applications, including documentation review, maintenance, and functional understanding.
* Developing and maintaining business applications using modern Java and Angular stacks.
* Re-engineering or fully rewriting applications to align with current architectural and development standards.
* Designing and developing application components and RESTful web services.
* Contributing to architectural building blocks in collaboration with technical leads and architects.
* Participating in Scrum ceremonies, technical working groups, and user meetings when required.
* Supporting testing activities, including unit and integration testing.
* Contributing to technical documentation, deployment, evaluation, and reporting.
* Working in a CI/CD-oriented environment with a strong focus on code quality.
* Supporting junior developers and integrating smoothly into existing teams.
What are we looking for?
* You have
5–7 years of full-time professional experience
as a
Java developer
.
* You have strong backend experience and a
good working affinity with frontend development
.
* You have hands-on experience with
Java 21 or higher
and the
Spring Framework
(
Spring Core, JDBC, Data, Security, AOP
).
* You have experience with
JPA (Hibernate)
.
* You have experience building
RESTful web services
.
* You are familiar with
OpenAPI
and
Swagger
.
* You have experience with
Keycloak
,
Lombok
, and
MapStruct
.
* You understand and have applied
SOA
,
Backend-for-Frontend
, and
CQRS
patterns.
* You apply
test-driven development
, including
JUnit, Spring Test, Mockito
, and
Cypress
.
* You have hands-on experience with
Angular (version 20)
.
* You have experience with
Maven
,
Docker
,
Kubernetes / OpenShift
,
Git
, and
GitLab CI
.
* You have experience with
NPM
.
* You have experience with
OAuth 2.0
.
* You have experience with
Flyway or Liquibase
.
* You have experience with
relational databases
, including PostgreSQL and SQL Server.
* You are able to read and understand
BPMN
and
UML
.
* You have experience working with
Jira
and
Confluence
.
* You are familiar with Agile / Scrum, CI/CD, and software engineering best practices.
* You are fluent in
Dutch or French
, and fluent in
English
.
What do we offer?
Location: near Brussels Midi (Hybrid)
Contract: Freelance or Permanent
Start date: As soon as possible
End date: 30 June 2026