154 Emplois pour Java - Belgique

We are hiring a Java Software Engineer with experience within the Financial Services for our client located in Brussels.

What you will do

• Build and enhance the Investment Dashboard used by thousands of customers for investment insights.
• Develop scalable backend solutions using Java 8, Spring Boot, Kafka, and Flink.
• Collaborate in an Agile Scrum squad to deliver end-to-end features within 2-week sprints.
• Contribute to automated testing using JUnit, Cucumber, and Wiremock.
• Participate in CI/CD pipelines using Jenkins and scripting (Groovy).
• Work closely with both onshore and offshore teammates in a flat, self-steering squad structure.
• Focus on delivering high-value, secure, and maintainable software aligned with business needs.

What you bring

• At least 3 years of professional Java development experience.
• Hands-on experience with Spring Boot, Kafka, and REST API development.
• Exposure to data streaming (Flink) and automated testing frameworks like Cucumber.
• Experience with version control (Git) and CI/CD tools (Jenkins, Maven).
• Good understanding of software architecture, integration patterns, and DevOps best practices.
• Agile mindset with a collaborative, respectful, and continuous improvement mentality.
• Fluent in English.

Interested? Apply immediately!

myNEBIRU: Not into this role, but interested in what NEBIRU does? That’s totally fine.

Visit to see how we can support you - even outside our client missions. Let’s build the bridge to your next step, together.

I’m current partnered with a client whose product transforms the way the world works by delivering products and services that connect the physical and digital worlds.

They are seeking an enthusiastic/ younger developer with decent experience to help modernize their tech stack.

Someone who is used to working incrementally (delivering smaller pieces of work more frequently), rather than working on a big product for 6 months which is the way a lot of legacy devs work.

An overview of your skills:

• 4+ years of total experience
• Strong coding skills in Java.
• Experience with Git, Devops, CI/CD pipelines
• Experience with Angular/ReactJS is a plus
• Experience with AWS technologies (S3, Kinesis, Lambda, EMR, .) is a plus
• Good level of knowledge and passionate about spring boot and microservices.
• Grasp of security concepts in preferred.
• Everyone in the office speaks French, so ideally they are fluent.

Salary & Benefits:

• Salary between €4,500 - €6,500 Gross
• Company Car & Fuel Card.
• Performance related bonus
• Annual Salary reviews
• Company Share Saver Scheme
• Meal vouchers.
• Group and health insurances.
• Hybrid working model.

If this role sounds of interest, contact me on LinkedIn or below:

Email:

Number: +32 (0) 331 800 74

Your tasks

• Develop and maintain applications in accordance with specifications and technical best practices;
• Requirements analysis;
• Investigate technical solutions which meet a list of requirements and standards;
• Assist the project manager in making proposals for the definition of tasks, estimates and deliverables;
• Define and integrate technological components or applications;
• Assist with deployment and configuration of the system;
• Take part in application support by investigating issues (3rd level support etc.);
• Developing and maintaining Java-based applications;
• Supporting integration with existing platforms;
• Assist in system enhancements and optimisations;
• Participate in testing, debugging, and validation activities.

Requirements

• University degree in IT or relevant discipline, combined with minimum 1 year of relevant working experience in IT;
• Minimum 1 year experience in Java application development;
• Minimum 1 year experience with relational databases;
• Knowledge of web standards, CSS-based design, cross-browser compatibility;
• Knowledge of REST and working with APIs, developing APIs, etc.;
• Knowledge of issue-tracking and ticketing tools;
• Knowledge of application integration;
• Knowledge in database management system;
• Experience with AGILE, Scrum or DevOps is a plus;
• Excellent command of the English language.

A software security-focussed company in the Walloon region is searching for a new Java developer on an employee contract to help modernise current legacy software/systems and continue to influence a team of 9 developers for years to come!

YOUR ROLE?

• Contribute to the migration of legacy applications into a modern technical stack.
• Design, develop, and maintain scalable applications using Java 21 and Spring Boot.
• Implement and optimize microservices architecture for high-performance systems.
• Collaborate in an Agile/Scrum environment with cross-functional teams.
• Ensure code quality through testing, peer reviews, and best practices.
• Participate in architectural discussions and contribute to technical decision-making.
• Support continuous integration and delivery (CI/CD) processes.
• Mentor junior developers and share knowledge across the team

YOUR EXPERIENCE?

• 5+ years experience in Java (preferably Java 17/21) and modern development practices.
• Experience with Spring Boot and building microservices.
• Good understanding in migrating or modernizing legacy systems.
• Familiarity with Agile methodologies and collaborative team environments.
• Solid understanding of RESTful APIs, databases, and integration patterns.
• Experience with CI/CD pipelines, version control (Git), and containerization (Docker/Kubernetes is a plus).
• Problem-solving mindset with attention to scalability, security, and maintainability.

We look forward to your application!

Jouw rol zal zijn om deel te nemen aan onze bestaande projectteams, deze te ondersteunen of te leiden en hen te helpen om het project om te zetten in een technisch succes door het gewenste eindresultaat voor de klant te produceren.

Op basis van je Career Development Path, je wensen, je interesses en je expertiseniveau, kun je deelnemen aan een project van A tot Z, dat wil zeggen vanaf het Blueprint / Audit niveau tot de implementatie van de voorgestelde oplossing.

Skills

• Je hebt minstens 3 jaar werkervaring.
• Je bent afgestudeerd als Bachelor of Master in IT of een aanverwante richting.
• Je hebt een passie voor ontwikkelen in Java en je hebt zin om je te verdiepen in Spring (Boot) frameworks en aanverwante Java tools.
• Je houdt van afwisseling en wil graag ervaring opdoen in verschillende projecten binnen toonaangevende, innovatieve bedrijven.
• Als gezicht van RP One bij de klant help je mee om de relatie met de klant te versterken.
• Je bent gepassioneerd door technologie en volgt de laatste trends.
• Clean coding en andere best practices van professioneel software vakmanschap maken deel uit van je dagelijkse job routine en je zoekt duo's en mentors die er net zo over denken en die hun ervaring met jou delen.
• Je spreekt Nederlands en je kan je vlot uitdrukken in het Engels.

Aanbod

• Een inspirerende werkomgeving met leuke collega's met een sterke focus op sfeer en teamspirit.
• Een persoonlijk carrièreplan en transparant opleidingsprogramma dat regelmatig besproken wordt met onze talent manager en dat je voorbereidt op de uitdaging van een sleutelpositie binnen onze klantenorganisatie.
• Een goede work-life balance met thuiswerk mogelijkheden.
• Een full-option loonpakket, inclusief tal van extralegale voordelen, zoals verzekeringen, netto vergoedingen, extra vakantiedagen, enz.
• Een premium bedrijfswagenpark in slimme combinatie met andere duurzame faciliteiten.

Position Title: Medior Full Stack Java Developer

Location: Brussels, Belgium

Duration: 5 months

Languages: Dutch or French and English

Work mode: Hybrid

Job Description:

As a Java Developer, you build applications specific to the notary profession.

You are responsible for the development of software that answers to our clients' functional and technical expectations. You support your team by bringing your expertise and your experience to the table. Your participation to the continuous improvement of processes and the setup of a state-of-the-art development environment is appreciated.

You want to:

• Design and develop technical solutions, starting from the functional requirements, and following our quality/security/legal guidelines and standards.
• Develop efficient, pragmatic, user friendly and easy to maintain java applications
• Ensure quality (unit/integration tests, documentation, Sonar compliance, OWASP checks.)
• Contribute to the development of our Service Oriented Architecture (SOA); Contribute to the continuous improvement of our development processes.
• Share your experience with Spring, Spring Boot, Maven, REST, JPA, SQL Server.
• Share your experience with Docker/Kubernetes, CI/CD in GCP.
• Work in an Agile environment.
• Interested in building good quality product in a micro service structure.
• You have a proven experience of java development with Spring (spring, spring-boot, spring-mvc) and Hibernate. You like to share your experience and knowledge with your team to deliver services that are of good quality, reusable and maintainable.

You have:

• Knowledge of REST or SOAP and web technologies.
• Experience with Java, Spring and Hibernate development.
• Knowledge of usual development patterns and object oriented design.
• Experience with SQL (Microsoft SqlServer).
• Knowledge of Domain Driven Design principles is a plus.

Backend side:

• You can Create Java application (Java 11) with a high standard of quality; Create REST API's services; Use efficiently the Spring ecosystem (spring boot, .);
• Read and write efficient SQL.
• Coach less experienced developers.
• Share your knowledge of Spring, Spring Boot, Maven, REST, JPA, SQL Server Share your Devops knowledge of CI/CD and GCP.
• Work with Docker and Kubernetes (nice to have).

Interested in frontend technologies like Angular. You already have professional or proven experience with Angular. You keep yourself up to date and like to share your experiences/knowledge. Delivering a good quality and user-friendly product is part of your main objective.

You have:

• Web technologies experience: REST, HTML/CSS, JavaScript ;
• Experience in Angular 2+ developments OR good experience in similar framework ;
• Experience with frontend development patterns: Smart/Dumb Components, Redux, etc. ;
• Experience in reactive development: RxJs ;
• Knowledge of Angular Cli, Material design and Javascript testing is a plus.

Skills

• Angular 2+
• Hibernate
• HTML/CSS
• Java
• Javascript
• Microsoft SQL Server
• ReactiveX - RxJs
• Redux
• Rest
• Spring

Questions

Can you confirm that you are able to be on-site 2 days a week? If not, the profile will automatically be rejected (exclusion criteria)

Can you please define the percentage (%) of frontend during your last mission?"

One of our leading banking partners is looking for a freelance Backend Java Engineer to take technical ownership of a legacy core lending system and support its evolution. This isn’t greenfield: it’s a real challenge for a real engineer who thrives in complex codebases and can strike a balance between modernisation and stability.

Logistics:

• Position: Freelance Backend Java Developer (Legacy Systems Specialist)
• Duration: 24-Month Contract
• Location: Brussels (Hybrid - 2 days/week onsite)
• Languages: English (French or Dutch is a bonus, not a must)
• Start Date: ASAP
• Day Rate: €(Negotiable & Competitive)

Core Responsibilities:

• Maintain and incrementally modernise a core lending system built on a legacy Java stack
• Design, refactor, and evolve Java components using Spring (non-Boot)
• Interface with XML-based integrations and SOAP web services
• Handle message-driven workflows using Kafka
• Collaborate with cross-functional teams to maintain quality, stability, and incremental improvements
• Work closely with technical leads on technical debt reduction and architecture improvements

Essential Skills:

• 6+ years of Java development experience, especially in large-scale enterprise systems
• Strong command of core Spring (non-Boot), object-oriented design, and clean code principles
• Hands-on experience with SOAP services and XML-based communication
• Familiarity with Kafka and Kubernetes in production environments
• Ability to work in a CI/CD-driven environment using Git, GitLab, Jenkins, SonarQube
• Solid understanding of legacy systems: how to respect them, work with them, and gradually improve them

Desirable Skills:

• Experience with Domain-Driven Design or hexagonal architecture
• Knowledge of Oracle databases and service bus architectures
• Familiarity with Fortify, Nexus, and other security/dependency tools
• Past exposure to modernising monolithic applications without destabilising them

What You Bring:

• Technical patience - you understand that working on legacy isn’t glamorous, but it’s critical
• Curiosity - you ask “why” before you rip and replace
• Team spirit - this is a collaborative squad that values input
• Problem-solving - deep-diving into decades-old code doesn’t scare you

Why This Role Matters:

This isn’t a typical Java contract. You’ll be touching the core of a system that handles critical banking operations - used by thousands, shaped over years, and in need of careful, expert handling.

Interested? Let’s talk. This is a key hire for one of Belgium’s most trusted financial players - and a chance to do meaningful technical work at scale.

SII Belgium is seeking a highly motivated and ambitious Java Developer to join our team. In this role, you will be responsible for designing and developing software applications, as well as maintaining and improving existing systems. You would join various teams working in AGILE mode for projects in the Defense, Energy, Banking or Telecom sectors.

SII is a European digital and engineering services company of 16,000 experts. SII Belgium supports large businesses in adopting new technologies and innovation management. SII values empowerment and entrepreneurship, providing a fulfilling work environment for employees. Our mission is to contribute to the design and development of future products and services for customers. SII is committed to a sustainable digital world and is recognized as a great workplace.

Key Responsibilities:

• Contribute in the design and outlining of Java solutions (with the analyst and / or architect)
• Understands the business needs and perform the needed functional analysis
• Ensure continuous integration and deployment of solutions
• Deliver scalable Java web applications according to agreed planning and budget
• Test applications and overcome technical issues encountered
• Add value to the sales cycle by giving input to your commercial colleagues (presales)
• Add constantly to the Java competency within SII Belgium
• Support the project manager during the estimation process
• Train customers and users

Requirements:

• Master's degree in computer science
• 3 years of relevant experience
• Familiar with Agile methodology such as Scrum; TDD
• Good knowledge of Java Spring MVC
• Experienced in JPA/Hibernate, Maven, GIT, SVN Jenkins
• Experience with HTML5, CSS frameworks (Bootstrap, .), Javascript frameworks (JQuery, Angular JS, React JS.) is an added value.
• A broad interest in developing web sites and web applications
• General best practices and design practices
• Fluent in English, ideally Dutch or French.

We offer:

• A challenging and varied role in a growing company
• Opportunity to work with the latest technologies
• Competitive salary and benefits
• Opportunity to improve your skills and knowledge through training and certification
• Warm and open company culture, supported by an international group

If you are a passionate and autonomous Java developer looking for an exciting opportunity with a growing company, we encourage you to apply for this position! Let's Tech Together!

Job Title: Senior Java Developer

Job Location: Liege, Belgium

Job Type: Contract

Hybrid/Onsite: Hybrid

Key Responsibilities:

• Design, develop, test, and maintain high-performance Java-based applications.
• Collaborate with business analysts, architects, and other developers to translate business requirements into technical solutions.
• Participate in all phases of the software development life cycle (SDLC).
• Develop and optimize APIs, microservices, and backend components.
• Conduct code reviews to ensure adherence to best practices and coding standards.
• Troubleshoot, debug, and enhance existing applications.
• Ensure applications are secure, scalable, and maintainable.
• Mentor junior developers and provide technical guidance.
• Stay updated with emerging technologies and recommend improvements.

Required Skills & Qualifications:

• 8+ years of hands-on experience in Java/J2EE application development.
• Strong expertise in Spring Framework (Spring Boot, Spring MVC, Spring Security).
• Experience with RESTful APIs, Microservices architecture.
• Strong knowledge of SQL and relational databases (MySQL, PostgreSQL, Oracle).
• Proficiency in build tools (Maven, Gradle) and version control (Git).
• Familiarity with cloud platforms (AWS, Azure, or GCP) is a plus.
• Experience with unit testing frameworks (JUnit, TestNG).
• Solid understanding of design patterns and object-oriented principles.
• Strong problem-solving and analytical skills.
• Excellent communication and interpersonal abilities.