Senior Java Backend Developer

Function

We’re looking for an experienced Senior Java Backend Consultant to join our client’s technology team and contribute to the design, development, and evolution of high-performance enterprise applications. In this role, you will help build robust, scalable, and highly available backend systems that support critical business operations. The position places a strong emphasis on microservices architecture, performance optimization, scalability, and backward compatibility, ensuring that solutions remain reliable and future-proof as systems evolve.

Role & Responsibilities
As part of a collaborative Agile team, you will play a key role across the entire backend development lifecycle, from technical analysis to production support. Your responsibilities will include:

• Translating business needs into technical solutions by analyzing requirements and assessing feasibility
• Designing and developing backend applications based on microservices architecture while ensuring system consistency and maintainability
• Implementing high-availability, resilient, and high-performance solutions suitable for critical production environments
• Ensuring version compatibility and backward compatibility during application evolution and service deployments
• Contributing to the technical architecture and ensuring alignment with our client’s broader IT strategy
• Writing and maintaining clear technical documentation for applications and processes
• Developing new features, resolving bugs, and performing code reviews to ensure code quality
• Implementing unit and integration testing strategies
• Monitoring applications in production, analyzing incidents, and contributing to continuous improvement
• Acting as a technical advisor for internal and external stakeholders

Technical Environment

• Java 21, including Reactive Streams and performance optimization
• Spring ecosystem for backend development
• Microservices architecture (service decoupling, inter-service communication, versioning, resilience)
• Databases such as Oracle, SQL, DB2 or similar relational systems
• Development tools including Git, Maven, Jenkins and JIRA
• IDE such as IntelliJ or equivalent
• Agile/SCRUM working methodology

Profile – The Ideal Candidate

• Master’s or Bachelor’s degree in IT, or equivalent experience
• Minimum 5 years of professional experience in backend analysis and development
• Strong expertise in Java development and microservices architecture design
• Solid understanding of object-oriented programming and database modeling
• Experience building scalable, performant and highly available systems
• Ability to challenge business requirements with technical insight and propose improvements
• Strong communication skills and ability to collaborate effectively in Agile teams
• Proactive, organized and able to work independently while maintaining a strong team spirit
• Fluent in English with good knowledge of French or Dutch (spoken and written)