Senior Tech Lead – Java & Spring Boot

Our client, a prominent organization in the public social security sector, is seeking a highly experienced professional to join their cross-functional architecture team. The role focuses on providing technical leadership and driving the architectural evolution of large-scale digital systems.

• Provide technical leadership to the architecture team and mentor development squads to foster continuous improvement.
• Define and evolve reference architectures while managing technological debt and long-term strategy.
• Establish SLI, SLO, and SLA frameworks and implement monitoring strategies to ensure system reliability.
• Collaborate with business stakeholders to translate complex requirements into technical specifications for strategic projects.
• Oversee the implementation of security regulations and information management standards in alignment with infrastructure teams.
• Lead the architectural design and lifecycle management for backend migration projects toward modern technology stacks.

• 8+ years of experience in Java and the Spring Boot ecosystem.
• 8+ years of experience in technical leadership and team management.
• Expertise in frontend development using TypeScript and Angular.
• Strong background in architecture modeling using C4 or Archimate and DDD methodologies.
• Proven experience with containerization and messaging tools including Docker, Kubernetes, and RabbitMQ.
• In-depth knowledge of security and API standards such as OAuth2, OIDC, OpenAPI, and AsyncAPI.
• Experience with CI/CD pipelines, Maven, Gradle, and automated testing tools like TDD and Cypress.
• Proficiency in Hibernate and system observability with OpenTelemetry.
• Submission of a completed coding exercise response as part of the application process.
• You are fluent in French with an active knowledge of English.

Nice to Haves

• Experience within social security institutions or related public sector domains.
• Certified Scrum Master or formal ICT project management training.
• Demonstrated success in migrating legacy systems to modern Spring architectures.

• Start date: 2026-11-23
• Duration: 14 months
• Work regime: Full-time
• Location: Brussels
• Working model: Hybrid
• Contract: open to both permanent employees and freelancers