Backend Systems Jobs In Brussels - 26 Job Positions Available

Senior Python Backend Developer (Energy Trading) We are looking for an experienced Python Backend Developer to design and build scalable backend services supporting asset onboarding, contract management, and energy market operations. You will develop APIs, data pipelines, and real-time

Let’s shape the future of finance - together At Isabel, we believe that real innovation happens when people and ideas connect That’s why we’re building more than technology, we’re building an ecosystem. One where every voice

Key Responsibilities 1. Platform Development & Architecture Design and implement backend services supporting MADP capabilities Contribute to an event-driven architecture (event sourcing, CQRS, messaging) Build and evolve platform-level components (not just feature-specific code) Ensure solutions are reusable,

Are you passionate about technology and renewable energy? Do you enjoy designing scalable software solutions while coaching and inspiring development teams? Then ENGIE, leader of the Energy Transition, needs YOU! For the Origination and Contract management

Web Application Developer – PHP / SIS We are looking for an experienced Web Application Developer to design, develop, maintain, test, and support secure and high-availability applications within a critical information system environment. Key Responsibilities Develop and

Senior Full Stack Java Developer (Java / Spring Boot / Angular) Location: Belgium (Hybrid) Start Date: September 2026 Contract Duration: 13 Months (with possible extension) Workload: 80–100% Language: Dutch (CEFR C2) – Mandatory Job Overview We

Joining Collibra’s Unstructured AI Team Work at the forefront of context engineering - shaping how AI systems retrieve, structure, and leverage context to deliver accurate, high-quality results at scale. Own end-to-end technical delivery of Unstructured AI systems -

Mission Speechify is the easiest way to listen to the world’s information. Articles on the web, documents in the cloud, books on your phone. We absorb it all and let you listen to it at your

Be part of a movement to change the way Europe pays In today’s digital Europe, payments still feel too complicated. Random delays, confusing rules, extra apps and accounts make it harder than it should be to

At Moodys, we unite the brightest minds to turn today’s risks into tomorrow’s opportunities. We do this by striving to create an inclusive environment where everyone feels welcome to be who they are—with the freedom to

At Moodys, we unite the brightest minds to turn today’s risks into tomorrow’s opportunities. We do this by striving to create an inclusive environment where everyone feels welcome to be who they are—with the freedom to

About Smile Passionate about tech, digital, and innovation? Join 1,800 employees at Smile, the European leader in open-source integration, spread across 20 agencies in 9 countries. Collaborative spirit and knowledge sharing are at the heart of

Application Developer JP055208 Role OverviewA public sector IT department is seeking a motivated Junior Application Developer to support the development of an internal web application for managing legal appeals filed against administrative decisions. The system tracks complex