Senior Java Consultant

We’re looking for an experienced Full-Stack Developer (Java + React) to join a major organisation in the financial services industry in Belgium. You’ll work on a range of impactful initiatives - building scalable services, modernising customer-facing applications, and contributing to a high-performing engineering environment that supports innovation across the business.

Logistics

• Position: Freelance Full-Stack Developer – Java & React
• Duration: 12-month contract (with potential extension)
• Day Rate: €(Competitive & Negotiable)
• Location: Brussels, Belgium (Hybrid – 2 days onsite per week)
• Start Date: 1st of Jan Start

Core Responsibilities

• Design, develop, and maintain full-stack applications using Java (backend) and React (frontend).
• Collaborate with product owners, architects, and fellow engineers to refine requirements and deliver high-quality solutions.
• Contribute to the development of modular, secure, and scalable APIs and services.
• Implement intuitive and responsive user interfaces that enhance customer and internal user experiences.
• Participate in Agile ceremonies and support continuous delivery practices.
• Ensure code quality through reviews, testing, and adherence to best practices.
• Help shape architectural decisions and technical direction across ongoing and greenfield projects.

Essential Skills & Experience

• Strong professional experience as a Full-Stack Developer using Java (Spring ecosystem preferred) and React.
• Solid understanding of modern software engineering practices, including CI/CD, automated testing, and microservices.
• Experience working in complex, enterprise-grade environments—ideally within financial services or other regulated industries.
• Ability to translate functional requirements into clean, maintainable, and performant code.
• Comfortable working within Agile teams and collaborating closely with both technical and non-technical stakeholders.
• Strong problem-solving skills and a proactive, ownership-driven mindset.
• Fluent in English; French or Dutch is an advantage.

Why Join?

This is an opportunity to play a key role in impactful, business-critical engineering initiatives within a major financial organisation. You’ll work in a dynamic, collaborative environment, contribute to both new and ongoing projects, and help deliver secure, performant applications that support the company’s digital strategy for years to come.