Java developer (Back-end)

🚀 Freelance Java Back-end Developer – Brussels

We are looking for an experienced Freelance Java Back-end Developer to join a high-visibility Agile environment in Brussels. You will work in a cross-functional squad responsible for critical customer-facing products within a large-scale enterprise IT landscape.

The team focuses on building and evolving digital solutions used across multiple channels and business lines, with a strong emphasis on back-end development, integrations, and modernisation.

💼 Your mission

As a senior back-end developer, you will:

• Maintain and further develop existing Java applications
• Build new back-end services and applications
• Migrate legacy applications to newer versions and architectures
• Work on integrations with third-party providers
• Translate business requirements into clean, high-quality code
• Design, build and maintain performant and reliable Java applications using Spring
• Write unit tests and ensure robustness, performance and scalability
• Actively participate in code reviews, refactoring and CI/CD practices

🧠 Your profile

• Minimum 4 years of relevant experience as a Java Developer
• Strong professional knowledge of English (Dutch and/or French is a plus)
• Solid experience with:
• Java, Spring, Maven
• RESTful APIs
• Oracle DB
• OO principles, SOLID, DDD and design patterns
• Hands-on experience with:
• Git, CI/CD pipelines
• Jenkins, SonarQube, Fortify, Nexus IQ (or similar tools)
• Test Driven Development

🔁 Agile mindset

You thrive in a Scrum/Agile environment and believe in:

• Team success over individual heroics
• Knowledge sharing and continuous improvement
• Pair programming and constructive code reviews
• Transparency, feedback and adaptability

🤝 Soft skills

• Strong communication and collaboration skills
• Able to challenge requirements from a technical perspective
• Proactive, accountable and comfortable taking the lead when needed
• Committed to long-term collaboration within a team

📍 Location: Brussels

🧾 Contract: Freelance

💻 Role: Java Back-end Developer