senior mainframe developer

Who We Are Flosum is a bootstrapped, profitable B2B SaaS company building the leading Salesforce-native DevSecOps, Data Protection, and Security platform. Our solutions are trusted by Fortune 500 enterprises in the most heavily regulated industries on the planet — financial services, healthcare, government, and insurance. Who We Are Flosum is a...

Bouw mee aan een strategisch AWS-platform met impact op miljoenen transacties. Stel je voor dat de software die jij ontwikkelt elke dag een cruciale rol speelt binnen een organisatie met miljoenen leden. Dat is precies wat je doet binnen het FOX-team. Hier bouw je niet zomaar aan een scherm, een API of een database. Je werkt mee aan een strategisch platform...

Devoteam Creative Tech in Belgium seeks a Senior Java Developer to design, build, and maintain high-performance enterprise apps and modern back-end services, with front-end integration. This is an AI-augmented role leveraging tools like Copilot and Gemini to accelerate development and ensure quality.You will participate in code reviews, testing, and...

Functieomschrijving Als Software Architect krijg je de unieke kans om in een groeiverhaal te stappen waar jij verantwoordelijk wordt voor de toekomst van hun software. Zo bepaal jij de richting van hun applicatie, maak jij de technische keuzes om hun product future proof te maken en bepaal jij concreet de roadmap voor verdere uitbreidingen. Deze unieke rol...

Great assignments await you with our key account clients in rich and varied environmentsOur client is looking for a Senior .NET Sitecore Developer with proven hands‑on experience in the Sitecore ecosystem. The consultant will contribute to the development, enhancement, and maintenance of enterprise digital platforms while working closely with technical and...

Solidaris recrute pour son Service Informatique un : *L’usage du masculin comme norme grammaticale dans cette offre d’emploi est une convention visant la lisibilité de son contenu. Ceci n’appelle aucune discrimination de genre dans le traitement des candidatures. Ces défis vous motivent : En tant que Mainframe Production Engineer, vous êtes...

ICTJob.be is seeking an experienced Mainframe Application Life Cycle Management Specialist to join a strategic project with a leading organisation in Belgium. The role focuses on mainframe development, deployment and lifecycle management, with Kobee experience not required.You will be part of a team driving ALM/DevOps improvements and standards. You will...

Mission Overview Keystone Solutions is seeking a consultant for a mission at a client site to expand their financial Data Warehouse. This role involves enhancing the existing structure by adding a new data source, which will impact the current dimensions and facts. Key Responsibilities Develop and maintain core applications and integration layers that...

NISH Technologies is seeking a Senior Python Developer to join a mission-critical internal monitoring platform in the energy sector. You will help monitor application health via sophisticated synthetic and log checks, and provide timely alerts when intervention is needed. You will collaborate with Software Developers, Product Owners, Analysts, Data...

Excited to work on a project for a key player in the energy landscape? The Belgian, German and European energy landscape is in full swing. Did you know that the organization plays a crucial role in this? As part of the organization, a European transmission system operator, the Belgian and German branches ensure the reliability and sustainability of the...

Senior Java Developer (Full Stack) Join our growing development team in Belgium and work on complex, enterprise-grade software for international clients across the EU and UK. You will work closely with project managers, designers, QA engineers, and other developers to deliver high-quality software solutions for our clients. This is an excellent opportunity...

Mission Overview: We are seeking a Senior Full Stack Java (Spring Boot) / Angular Developer for a consultancy mission at a client site representing Keystone Solutions. The project involves replacing an outdated business application with a new regulatory management application focused on complete traceability of files from origin to final decision. The...

Nexuzhealth, with offices across Belgium, seeks an experienced Senior Developer to design and implement cloud-native features in one of its engineering teams. You will work with microservices, event-driven architectures, and modern AI tools while delivering high-quality, maintainable code. Ideal candidates have 8+ years in software development, strong...

Verantwoordelijkheden Technische analyse en uitwerking van technische designs op basis van functionele analyses. Ontwikkelen en onderhouden van enterprise-applicaties. Zorgen voor volledige unit test coverage van de code. Ondersteunen van testers bij functionele testen. Analyseren van integraties met externe partijen en systemen. Technische verbeteringen...

Senior Java Developer (Full Stack) Join our growing development team in Belgium and work on complex, enterprise-grade software for international clients across the EU and UK. You will work closely with project managers, designers, QA engineers, and other developers to deliver high-quality software solutions for our clients. This is an excellent opportunity...

Prenez un rôle clé dans la modernisation d’un environnement applicatif complexe et faites évoluer des solutions métiers robustes en .NET/C\\#. Notre partenaire est une organisation établie disposant de sa propre équipe IT interne , au sein de laquelle la technologie joue un rôle direct dans le fonctionnement des activités. Dans le cadre de...

Excited to work on a project for a key player in the energy landscape? The Belgian, German and European energy landscape is in full swing. Did you know that the organization plays a crucial role in this? As part of the organization, a European transmission system operator, the Belgian and German branches ensure the reliability and sustainability of the...

Bruxelles, Belgium | Posted on 08/20/2026 We're seeking enthusiastic and adaptable candidates, who are eager to expand their horizons and gain unparalleled experience in a diverse international environment. This opportunity is ideal for those looking to build a global network and develop professional skills in a multicultural setting. We are looking for a...

Enkel de kandidaturen die voldoen aan de vooropgestelde criteria van de organisatie (vaardigheden, werkervaring, talenkennis en beschikbaarheid) in deze job post komen in aanmerking. Indien bovenstaande niet gerespecteerd wordt, behouden de organisatie zich het recht om de kandidatuur af te wijzen. In bijlage vind je verschillende documenten terug die...

Function We're looking for a Senior Full-Stack Developer to join our client's technology team and contribute to the development of modern web applications running on Azure Kubernetes Service. Depending on your expertise and the needs of the teams, you may work on customer-facing applications, shared IT services, data-driven solutions or technical initiatives...