Senior Java Backend Engineer - Spring, APIs (Brussels)

SEIDOR; Brussel Hoofdstad; Sur place; EUR 70 000 - 100 000; Plein temps

Résumé du poste

SEIDOR, Brussels-based multinational technology company, is seeking a Senior Java Developer to design, develop and test backend components using the Spring stack in a Brussels office. You will implement REST and event-driven APIs, ensure secure authentication and contribute to CI/CD pipelines.

The role requires strong Java backend expertise, extensive Spring experience, and leadership in backend design. The team collaborates to deliver high-impact technology solutions across domains.

Qualifications

• 4 years of experience developing Java back-end applications.
• 8 years of experience with the Spring ecosystem (Spring Boot, Spring Security, Spring Data).
• 8 years of experience designing and implementing REST APIs and event-driven integrations.
• 6 years of experience with relational databases and ORM frameworks (e.g. Hibernate/JPA).
• 5 years of experience with development and DevSecOps tooling, including version control, issue tracking, collaboration and CI/CD pipelines.
• 3 years of experience as technical lead of a back-end development team, including coding standards and security optimisation.

Responsabilités

• Design, develop and unit-test back-end components using the Spring ecosystem.
• Implement REST and event-driven APIs and the underlying business logic.
• Implement persistence layers and integrate with messaging systems.
• Implement authentication and authorisation (OAuth 2.0 / OIDC / SAML).
• Contribute source code and configuration to the customer's CI/CD pipeline.
• Participate in code reviews and pair programming.
• Produce and maintain API documentation.
• Identify, debug and fix defects; support deployment and migration activities.

Connaissances

Java back-end development

Spring ecosystem

REST API design

Event-driven integrations

Relational databases/ORM

DevSecOps tooling

Technical lead experience

Formation

Bachelor's degree in Computer Science

Master's degree in Computer Science

Outils

Git

Jira

Confluence

CI/CD pipelines (Jenkins/Bamboo)

Description du poste

SEIDOR, Brussels-based multinational technology company, is seeking a Senior Java Developer to design, develop and test backend components using the Spring stack in a Brussels office. You will implement REST and event-driven APIs, ensure secure authentication and contribute to CI/CD pipelines.

The role requires strong Java backend expertise, extensive Spring experience, and leadership in backend design. The team collaborates to deliver high-impact technology solutions across domains.