cover image
Uni Systems

Backend Developer (Java)

Hybrid

Brussels, Belgium

Senior

Full Time

09-09-2025

Share this job:

Skills

Java PHP Jira MySQL MongoDB DevOps Docker Kubernetes Databases git angular Azure AWS Confluence Postman Junit Spring Hibernate Spring Boot Maven Kafka

Job Specifications

At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a Backend Developer (Java) to join our UniQue team.

What will you be doing in this role?

Development of back-end website applications
Integration of user-facing elements developed by a front-end developers 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.
Write technical documentation

Requirements

What will you be bringing to the team?

Have at least a Bachelor's degree
Possess a Certificate as Java EE Application Developer
10 years' experience with Java/JEE and its frameworks (Spring, Spring Boot, Hibernate)
3 years' experience with Cloud-based DevOps
2 years' experience with{{:}} Postman, MySQL, Oracle, MongoDB, Maven, Git, SVN, Angular 10+, eREST services, Jira, Confluence, Kafka, Swagger, Kubernetes, Docker, AWS/Azure, ElasticSearch, Junit, PHP are considered as additional assets
1 year experience with Weblogic Application Server
Experience of development with Compass Corporate is considered an asset
The following certifications are not mandatory but considered an asset{{:}} Certified DevSecOps Professional (CDP) certification, AWS Certified Solutions Architect, Microsoft Certified{{:}} Azure Solutions Architect Expert, Google Professional Cloud Architect, Certified Kubernetes Application Developer (CKAD)
Proficiency in English C1 level

About the Company

Uni Systems, a member of Quest Group, has been a reliable ICT partner to companies and organizations in the European market for over 60 years. We are the first IT company founded in Greece, in 1964, and we have been supporting our clients ever since. Trusting customers, extensive solutions offering, strong partnerships and experienced people, those are the main grounds for Uni Systems’ rapid expansion of operations across geographies and industries. With more than 1450 specialized ICT professionals, established presence in ... Know more