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Senior Java Engineer (m/f/d)

Contract
Brussels, United Kingdom
04.06.2026

A leading international financial services organisation operating in a highly regulated environment, delivering critical IT solutions that support large-scale, high-performance systems. The organisation is currently undertaking a major transformation programme to modernise legacy applications into scalable, event-driven and service-oriented platforms.


Responsibilities

  • Participate in the migration of legacy systems to modern event-driven and service-oriented architectures within an agile team
  • Lead the end-to-end delivery of IT solutions, ensuring alignment with both functional and non-functional requirements
  • Ensure solutions comply with enterprise architecture standards and engineering best practices
  • Maintain consistency across platforms and teams by coordinating solution walkthroughs and alignment activities
  • Contribute to hands-on development while supporting and mentoring junior team members
  • Ensure design and development activities adhere to established quality standards and guidelines

Qualifications and Skills

  • Strong experience across the full software development lifecycle, from design to production support
  • Solid expertise in object-oriented programming and modern backend development practices
  • Proven experience building and delivering distributed and service-based solutions
  • Experience working with containerised environments and deploying applications on Unix/Linux systems
  • Strong understanding of testing methodologies, including behaviour-driven and test-driven development
  • Excellent communication, leadership, and mentoring skills within agile and collaborative environments

Halian Group:

With over 28 years of experience, we have come to understand that innovation is the only way to provide agile, practical solutions that transform businesses and careers.

Our resourcing and smart services help you to realise tomorrow’s potential. Discover the amazing things possible when you bring the right people and the right technologies together.

At Halian, we recognise that diversity, equity, and inclusion (DEI) are essential to building high-performing teams for our clients. We are committed to connecting organisations with top talent from all backgrounds, ensuring that every individual feels valued, respected, and empowered to contribute their unique perspectives. We encourage applications from all qualified candidates, regardless of race, gender, disability, or any other characteristic that makes them unique. By fostering diverse and inclusive workplaces, we help our clients drive innovation, enhance collaboration, and better reflect the communities they serve.

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