AISB-869 Fullstack Java developper Senior

Brussels, Belgien

At ABAKUS IT-SOLUTIONS, we are looking for a Senior Fullstack Java Developer to support our clients in their most strategic IT transformation initiatives. You will join challenging environments where legacy systems coexist with modern Cloud and microservices architectures, contributing to the evolution and modernization of critical applications.

Your Responsibilities

As a Senior Developer, you will play a key role across the full development lifecycle:

  • Design, develop, and enhance robust, scalable, and user-centric applications
  • Analyze technical requirements and propose efficient, sustainable solutions
  • Contribute to technical analysis and implementation of complex systems
  • Advise on integrations, data models, scalability, and performance optimization
  • Troubleshoot and resolve complex issues in highly interconnected environments
  • Promote best practices and support the adoption of modern architectures
  • Ensure alignment between legacy platforms and new Cloud-based solutions

Technical Environment

  • Java (Spring Boot, microservices, API-driven and event-driven architectures)
  • Frontend frameworks (Angular or React)
  • Containerization & orchestration (Docker, OpenShift)
  • Databases (MySQL, data modeling)
  • Integration technologies (REST, GraphQL, messaging systems)
  • Tools & practices (JUnit, Maven, Git, SonarQube, Swagger/OpenAPI)
  • Architecture (Hexagonal architecture, resilient and high-availability systems)
  • Security and compliance standards (including NIS2)

Your Profile

  • 5–7+ years of experience in complex software development
  • Strong analytical and problem-solving skills
  • Ability to bridge business needs and technical solutions
  • Autonomous, proactive, and quality-oriented mindset
  • Strong communication and collaboration skills
  • Comfortable working in Agile/Scrum environments

Languages

  • Professional working proficiency in English, French, and Dutch

What We Offer

  • Opportunity to work on high-impact projects with leading organizations
  • Exposure to modern technologies and large-scale transformation programs
  • Flexible hybrid working model
  • A collaborative and expert-driven environment within ABAKUS IT-SOLUTIONS

Join ABAKUS IT-SOLUTIONS and become an expert in IT comfort!

ABAKUS IT-SOLUTIONS is seeking to hire people passionate about IT not afraid to mix serious work and a bit of madness!

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by ABAKUS IT-SOLUTIONS

Opportunities are numerous. From bare applications development to of IT infrastructures management including conception, architecture and requirements analysis.

Although open to technologies used by our customers, ABAKUS IT-SOLUTIONS seeks mainly but not only consultants mastering: Windows and Linux Servers, networks, developments (JAVA, SAP, .NET,…) as well as highly specialized experts for example in cybersecurity or in Content Management System (CMS) (SharePoint, Drupal, WebLogic…).

In terms of non-technical competencies, ABAKUS IT-SOLUTIONS hires dynamic persons, open to the world, interested by innovation and having a keen sense of client relationship.

A very good command of English is essential, the capacity to speak French, German or Dutch is an asset.

Even though most of our positions require at least 3 years of experience, some are open to new starters.

ABAKUS IT-SOLUTIONS works either in its premises or in our customer’s one, remote activities are sometime possible.

In the meantime,

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