Java Developer Senior - On site - Brussels

SEIDOR; Brussel Hoofdstad; Presencial; EUR 70.000 - 100.000; Jornada completa

Descripción de la vacante

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.

Formación

• 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.

Responsabilidades

• 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.

Conocimientos

Java back-end development

Spring ecosystem

REST API design

Event-driven integrations

Relational databases/ORM

DevSecOps tooling

Technical lead experience

Educación

Bachelor's degree in Computer Science

Master's degree in Computer Science

Herramientas

Git

Jira

Confluence

CI/CD pipelines (Jenkins/Bamboo)

Descripción del empleo

ARE YOU UP FOR THE CHALLENGE?

SEIDOR is a multinational technology company with a start-up spirit. We organize ourselves into expert knowledge Units that collaborate with each other.

That's why we are looking for curious individuals who are motivated by challenges and eager to grow personally and professionally, to join our team and make a positive impact on the world through technology.

We want you to be a part of our team, in Brussels, as a Senior Java Developer.

WHAT WILL YOU DO IN YOUR DAY-TO-DAY?

• 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

Will you join us in humanizing technology?

Requirements

WHAT DO WE EXPECT FROM YOU?

If holding a Bachelor's degree at least 15 years of experience, if holding a Master's degree at least 13 years of expeirence.

• 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 eventdriven 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 (Git), issue tracking (e.g. Jira or equivalent), collaboration (e.g. Confluence or equivalent) and CI/CD pipelines (e.g. Jenkins, Bamboo or equivalent)
• 3 years of experience as technical lead of a back-end development team, including technical design decisions, definition of coding standards and performance and security optimisation

Educational Level required: Bachelor's degree (EQF level 6) in Computer Science, or equivalent

NICE TO HAVE:

• Experience with messaging/event platforms (e.g. Kafka, RabbitMQ)
• Experience with containerisation and orchestration (e.g. Docker, Kubernetes)
• Experience developing back-end applications in at least one of the customer's business domains (event management, safety and security, or document management)