java developer freelance

VerantwoordelijkhedenOntwikkelen en onderhouden van de core-architectuur voor foutloze, schaalbare en veilige verwerking van betalingen.Bouwen van robuuste API's en integraties met banken, softwarehuizen en grote ondernemingen, inclusief technische ondersteuning bij opleveringen.Aanpakken van complexe uitdagingen rondom retries, concurrent verwerken en het...

Participez à la conception d’applications stratégiques tout en influençant les choix techniques et architecturaux d'une entreprise belge de premier plan.Notre partenaire est une organisation belge reconnue, engagée dans une importante transformation digitale et investissant continuellement dans la modernisation de ses plateformes et applications.Afin...

Voor een van onze klanten zijn we op zoek naar een Java Developer die het Solutions Team komt versterken.Je werkt mee aan de ontwikkeling, het onderhoud en de optimalisatie van twee bestaande webapplicaties binnen een langdurig, businessgedreven IT-programma.De focus ligt voornamelijk op het oplossen van technische issues, het verbeteren van de performantie...

The PositionAs part of our ongoing growth, we are looking for a Senior Java Software Developer to join our teams and work on client projects located in Brussels. You will join our client’s application modernization initiative, focused on upgrading and modernizing a portfolio of existing Java applications running on legacy environments.As a Senior Java...

Build modern applications end-to-end as a consultant on a client project. You’ll develop robust Java solutions, contribute to the front-end when needed, and deliver high-quality software with support from experienced technical coaches. Responsibilities Build and evolve backend services using Java with Spring and Hibernate. Translate business needs into...

Mission Overview:Keystone Solutions is hiring a Senior Java Developer Consultant for a consultancy mission with a client in Brussels. As a Keystone Solutions consultant, you will represent Keystone Solutions within the client environment, working as part of an agile team to design, build, test and integrate valuable product increments within each sprint. The...

Twikey verwerkt elke dag de terugkerende betalingen van duizenden bedrijven: domiciliëringen, kaartbetalingen, betaallinks. Achter elke transactie zit een klant die erop rekent dat het geld correct, één keer en op tijd binnenkomt. Dat is het systeem dat jij mee bouwt. Je werkt in een klein development team aan de kern van het platform: 3 developers, 2...

Voor een gerenommeerde software onderneming die al meer dan 20 jaar ervaring & expertise heeft in het bouwen van maatoplossingen, zowel binnen scale-ups als big enterprises zoeken we een ervaren Full Stack Java Developer. Wie ben jij? Je hebt bij voorkeur een Bachelor/Master in Informatica/Computerwetenschappen/Elektronica-ICT (of een gelijkaardige studie)...

ICTCG accompagne Infrabel dans la modernisation et la digitalisation de ses applications métiers au sein du département I-ICT.Vous rejoignez une squad Agile/Scrum à Bruxelles et contribuez au développement de solutions Java critiques pour l'exploitation ferroviaire.ResponsabilitésAssurer le leadership technique sur un scope back‑end critique pour...

We are currently looking for a Senior Java Full Stack Developer to join a major business transformation programme in Brussels.We're seeking an experienced consultant with a strong background in full-stack development and complex enterprise environments.AngularHibernate / JPAREST & SOAP APIsMicroservices, SOA & CQRSJUnit, Mockito, Selenium & CypressGit &...

We are looking for a Dutch-speaking Java / MuleSoft Developer to join our team on a hybrid basis in Antwerp. You will design, develop, and maintain integration solutions and Java-based applications, working with modern tooling including Java 21. Key responsibilities Design and develop integration flows and APIs using MuleSoft (Anypoint Platform) Build and...

Mission context We are seeking an experienced Full-Stack Developer (Java – React) to join a multidisciplinary Agile squad responsible for delivering and maintaining innovative digital banking solutions for enterprise customers. The role involves end-to-end software development across both frontend and backend systems, contributing to web and mobile...

A well-established organization operating in a regulated environment is seeking a Senior Java Analyst Developer / Technical Lead to join its IT team. The role combines hands-on Java development with technical leadership, application architecture, maintenance, and collaboration with business stakeholders. The successful candidate will take ownership of...

Job role: Senior Java Developer. Location: Brussels (On site). Languages required: English (C1) (Mandatory) . Minimum experience required: 14 years. Overview Senior Java Developer role based in Brussels with on-site work. English required at C1 level (mandatory). Minimum experience: 14 years. Responsibilities Software Development: Design and...

Be Consultancy Group BV is urgently seeking an experienced Senior Java Developer to join an international organization in Brussels, Belgium. EU candidates willing to relocate to Brussels are encouraged to apply and must have the legal right to work in Belgium; sponsorship is not provided. You will design and develop Java components, analyze system...

Nexuzhealth NV zoekt een ervaren Senior Developer om mee te bouwen aan cloud-native applicaties en meerdere functionele domeinen van onze producten te implementeren. Je werkt aan microservices, event-driven architectuur en APIs, met nadruk op SOLID, Clean Architecture, DDD en TDD. Je hebt minimaal 8 jaar ervaring in softwareontwikkeling, en bekwaam in...

SEIDOR, a multinational technology company with a start-up spirit, is seeking a Senior Java Developer to join our Brussels team in a hybrid role. You will design, develop and test back-end components within the Spring ecosystem, implement REST and event-driven APIs, and ensure secure authentication and authorization. You will contribute to persistence...

Fieldside recherche un architecte IT pour orchestrer des architectures cloud/hybrides et assurer leur sécurité selon NIS2. Vous analyserez des projets complexes, recommanderez des solutions et guiderez l’équipe dans l’adoption de technologies modernes. Profil recherché: 5–7+ ans d’expérience, maîtrise de Java Spring, OpenShift et bases de...

Be Consultancy Group BV in Brussels is seeking a Senior Java/Angular Developer to design, develop and maintain web applications using Java and Angular within an international IT environment. Relocation to Brussels is considered; EU candidates are welcome, but a work permit is not provided. You will join a team focused on reliable, scalable software and...

For one of our clients in Brussels, I am looking for a Tech Lead Java Developer available to start on 1st December . Key requirements: Strong expertise in Java (latest versions), Spring Boot and Microservices Experience with REST APIs, Docker and application security Full Stack experience (Angular is a plus) Ability to lead, coach and support a...