Senior Java Developer

Location: Brussels Belgium
Work Model: Hybrid (Onsite presence required on Mondays and Thursdays)
Contract Duration: June 2026 January 2027
Employment Type: Contract / Freelance
Language Requirement: Dutch (CEFR C2)

We are looking for an experienced Senior Java Developer to join a team responsible for a large-scale digital identity and access management platform within the education sector.

This platform provides secure and user-friendly access to digital learning resources through a Single Sign-On (SSO) solution enabling students and educational institutions to seamlessly access multiple applications through a single authentication process.

As a Senior Developer you will contribute to the development enhancement and maintenance of critical platform components while helping shape the future of digital education infrastructure.

• Design develop test and maintain enterprise-grade Java applications.
• Build and enhance RESTful APIs and backend services.
• Collaborate with analysts architects and stakeholders to translate requirements into technical solutions.
• Develop and optimize database structures and queries using PostgreSQL.
• Participate in Agile development activities including sprint planning reviews and retrospectives.
• Ensure code quality through testing debugging and continuous improvement practices.
• Contribute to technical documentation and knowledge sharing.
• Support authentication and access management initiatives including Single Sign-On integrations.
• Coach and mentor team members while contributing to a collaborative development culture.
• Assist in the evolution of data platform capabilities and related services.

• Minimum 5 years of professional experience with Java development.
• Minimum 5 years of experience with Spring Boot.
• Minimum 5 years of experience building and maintaining REST APIs.
• Minimum 5 years of experience with SQL/PostgreSQL.
• Minimum 5 years of experience using Jenkins for CI/CD.
• Minimum 5 years of experience working with Atlassian tools (Jira & Confluence).
• Experience developing applications within Agile environments.
• Fluent Dutch language skills (CEFR C2).
• Strong problem-solving testing debugging and troubleshooting skills.

• Experience within the education sector or EdTech environments.
• Experience leading development teams and mentoring developers.
• Knowledge of JSON and API integrations.
• Experience with technical documentation and knowledge management.
• Experience contributing to the creation or evolution of data platforms.
• Experience implementing or supporting Single Sign-On (SSO) solutions.
• Strong understanding of Agile methodologies and best practices.

You are a proactive and technically strong developer who enjoys building reliable scalable solutions. You combine excellent coding skills with strong communication abilities and thrive in Agile teams where collaboration and continuous improvement are highly valued.

You are comfortable taking ownership of complex technical challenges and helping guide development teams toward successful project outcomes.

• Java
• Spring Boot
• REST APIs
• PostgreSQL
• SQL
• Jenkins
• Jira
• Confluence
• JSON
• Single Sign-On (SSO)
• Agile Development

• Opportunity to work on a high-impact digital platform serving the education sector.
• Hybrid working flexibility.
• Long-term contract opportunity.
• Collaborative Agile environment.
• Exposure to modern authentication and access management technologies.
• Opportunity to influence the evolution of a critical digital ecosystem.

• Location: Brussels Belgium
• Start Date: June 2026
• End Date: January 2027
• Work Arrangement: Hybrid
• Contract Type: Freelance / Contract
• Workload: Full-Time

If you are a Senior Java Developer with strong experience in Spring Boot REST APIs PostgreSQL and Agile development and youre looking to contribute to a meaningful digital transformation initiative we would love to hear from you.