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Uni Systems

Backend Developer

Uni Systems
Belgium · Full-time · Mid-Senior
At Uni Systems, we are working towards turning digital visions into reality. We are continuously growing and we are looking for a Backend Developer to join our UniQue team in Brussels!

What will you be doing in this role?

  • 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

Requirements

What you need to succeed in this position{{:}}

  • BSc degree in IT and at least 11 years of experience, or MSc degree and minimum 7 years experience
  • At least 1 year of specific expertise in Back-end{{:}} Vert.x, Kotlin , Java (> 17) , Spring Boot (WebFlux), Hibernate
  • At least 1 year of specific expertise in Architecture & Integration{{:}} Microservices Architecture, API-driven Development, AS4
  • At least 1 year of specific expertise in Databases{{:}} MongoDB , PostgreSQL, Virtuoso Triple Store, OpenSearch
  • At least 1 year of specific expertise in Containerization & Orchestration{{:}} Docker, Kubernetes
  • At least 1 year of experience in Security{{:}} OpenID Connect, OAuth2, TLS, Keycloak
  • At least 1 year of specific expertise in Security Testing & Dependency Management{{:}} SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, Maven
  • At least 1 year of specific expertise in Collaboration & Productivity Tools{{:}} JIRA, Confluence, Office 365, SharePoint

At Uni Systems, we are providing equal employment opportunities and banning any form of discrimination on grounds of gender, religion, race, color, nationality, disability, social class, political beliefs, age, marital status, sexual orientation or any other characteristics. Take a look at our Diversity, Equality & Inclusion Policy for more information.

Key Skills

Ranked by relevance

containerization microservices spring boot postgresql confluence storage kotlin docker server java jira
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Country Guide

Belgium

International hub for EU careers

Posted
Dec 18, 2025
Type
Full-time
Level
Mid-Senior
Location
Brussels
Company
Uni Systems

Industries

Technology Information Internet

Categories

Engineering Information Technology

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