Backend Engineer: Java/JEE, APIs & Scalable Systems

SEIDOR; Brussel Hoofdstad; On-site; EUR 60,000 - 90,000; Full time

Job summary

SEIDOR is seeking a Back-end Developer to join our Brussels-based team working with European Institutions. You will develop back-end applications, integrate server-side logic with front-end work, and implement core business processes.

The role includes API design, data storage solutions, security, performance optimization, and writing technical documentation. Requirements include Java/JEE expertise, REST/SOAP API design, PostgreSQL, Docker & Kubernetes, OAuth2/OpenID Connect, Git, and Jenkins

Qualifications

• Experience in Java/JEE backend development.
• Strong experience designing and developing REST and SOAP APIs.
• Solid knowledge of PostgreSQL and advanced SQL.
• Experience with Docker and Kubernetes.
• Knowledge of OAuth2 and OpenID Connect security protocols.
• Experience with Git and CI/CD tools such as Jenkins.
• Ability to design scalable, secure, and high-performance backend solutions.

Responsibilities

• Development of back-end website applications.
• Integration of user-facing elements developed by a front-end developer with server side logic.
• Implement core business logic.
• Creation of servers and databases for functionality.
• Design and implementation of data storage solutions.
• Understanding and implementation of security and data protection.
• Optimization of the application for maximum speed and scalability.
• Design and develop APIs.
• Participating in the design and creation of scalable software.
• Taking lead on projects, as needed.
• Maintenance of code integrity and organisation.
• Writing clean, functional code on the back-end.
• Compile and analyse data, processes, and codes to troubleshoot problems and identify areas for improvement.
• Testing and fixing bugs or other coding issues
• Meet both technical and consumer needs.
• Write technical documentation

Skills

Java/JEE

REST APIs

SOAP APIs

PostgreSQL

Security best practices

API design

Education

Bachelor level or 3 years of higher education

Tools

Docker

Kubernetes

Git

Jenkins

Job description

SEIDOR is seeking a Back-end Developer to join our Brussels-based team working with European Institutions. You will develop back-end applications, integrate server-side logic with front-end work, and implement core business processes.

The role includes API design, data storage solutions, security, performance optimization, and writing technical documentation. Requirements include Java/JEE expertise, REST/SOAP API design, PostgreSQL, Docker & Kubernetes, OAuth2/OpenID Connect, Git, and Jenkins