Java Developer Senior - Near site (Hybrid) - Brussels

SEIDOR; Brussel; Hybrid; EUR 70,000 - 95,000; Full time

Job summary

SEIDOR, a multinational technology company with a start-up spirit, is seeking a Senior Java Developer to join our Brussels team in a hybrid role. You will design, develop and test back-end components within the Spring ecosystem, implement REST and event-driven APIs, and ensure secure authentication and authorization.

You will contribute to persistence layers, messaging integrations, and CI/CD workflows, while participating in code reviews, pair programming, and API documentation.

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 (Hibernate/JPA).
• 5 years of experience with development and DevSecOps tooling, including Git, Jira or equivalent, Confluence or equivalent, and CI/CD pipelines (Jenkins, Bamboo or equivalent).
• 3 years of experience as technical lead of a back-end development team, including design decisions and coding standards.

Responsibilities

• 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.

Skills

Java back-end

Spring ecosystem

REST APIs

OAuth/OIDC/SAML

CI/CD

Technical leadership

Education

Bachelor's degree in Computer Science

Master's degree in Computer Science

Tools

Docker

Kubernetes

Kafka

RabbitMQ

Git

Jira/Confluence

Job description

About The Job

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

About The Job

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.

ARE YOU UP FOR THE CHALLENGE?

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

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

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

English: level C1

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)