Senior Java Developer
First seen by Alion on Oct 30, 2026.
On behalf of our Client from Belgium, Mobilunity is looking for a Java Developer.
Our Client is a rapidly growing HR Tech company in Belgium. The company provides Search & Selection services to connect talent with companies and offers Digital Payroll solutions that support clients working with flexible employment models.
Responsibilities:
Contribute ideas and actively participate in the innovation and product improvement process
Design and implement well-structured, testable, and efficient back-end code (Java, Spring)
Build and maintain RESTful APIs and integrations for web and mobile applications
Design, optimize, and maintain PostgreSQL databases (Aurora on AWS)
Develop modular, reusable services and libraries with future reuse in mind
Implement and maintain a clear, well-defined application architecture following best practices
Communicate daily with the team to coordinate development, share progress, and resolve blockers
Ensure code quality through unit and integration testing, code reviews, and adherence to established coding standards
Requirements:
5+ years of relevant experience
Experience with Java and Spring (Boot, Security, Core, JPA)
Clean architecture, distributed system design and microservices architecture
Experience with Spring Framework
Experience working with PostgreSQL databases (preferably Amazon Aurora PostgreSQL)
Confident level of English (at least upper-intermediate to handle all communications)
Nice to have:
Experience with Angular
Experience with AWS
Experience with GitHub
Experience with Jenkins and CI/CD pipelines
Familiarity with Atlassian tools (Jira, Confluence) for ticket management and documentation