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Application Developer (m/f/d)
Contract
Brussels, Belgium
20.02.2026
You will join a structured corporate IT environment and contribute to the development and evolution of internal business applications supporting several key support functions. These applications cover a wide functional scope, ranging from operational processing to reporting and decision‑support activities.
The assignment takes place in a context of continuous system improvement and involvement in high‑impact internal projects.
Responsibilities:
· Contribute to a major ongoing application project involving functional and technical enhancements
· Maintain and enhance existing internal applications
· Design and develop new features aligned with business needs
· Participate in testing, deployment, and production releases
· Apply development best practices and version control standards
· Work closely with cross‑functional teams (IT and business stakeholders)
· Provide technical expertise and support within the development team
Qualifications and Skills:
· Proven experience as an application developer
· Ability to work on both existing systems and new developments
· Solid understanding of web architectures and API interactions
· Comfortable working in structured, enterprise environments
· Capable of managing multiple topics in parallel
· Professional proficiency in French
· Good understanding of technical English
Halian Group
With over 28 years of experience, we have come to understand that innovation is the only way to provide agile, practical solutions that transform businesses and careers.
Our resourcing and smart services help you to realize tomorrow’s potential. Discover the amazing things possible when you bring the right people and the right technologies together.
At Halian, we recognize that diversity, equity, and inclusion (DEI) are essential to building high-performing teams for our clients. We are committed to connecting organizations with top talent from all backgrounds, ensuring that every individual feels valued, respected, and empowered to contribute their unique perspectives. We encourage applications from all qualified candidates, regardless of race, gender, disability, or any other characteristic that makes them unique. By fostering diverse and inclusive workplaces, we help our clients drive innovation, enhance collaboration, and better reflect the communities they serve.
The assignment takes place in a context of continuous system improvement and involvement in high‑impact internal projects.
Responsibilities:
· Contribute to a major ongoing application project involving functional and technical enhancements
· Maintain and enhance existing internal applications
· Design and develop new features aligned with business needs
· Participate in testing, deployment, and production releases
· Apply development best practices and version control standards
· Work closely with cross‑functional teams (IT and business stakeholders)
· Provide technical expertise and support within the development team
Qualifications and Skills:
· Proven experience as an application developer
· Ability to work on both existing systems and new developments
· Solid understanding of web architectures and API interactions
· Comfortable working in structured, enterprise environments
· Capable of managing multiple topics in parallel
· Professional proficiency in French
· Good understanding of technical English
Halian Group
With over 28 years of experience, we have come to understand that innovation is the only way to provide agile, practical solutions that transform businesses and careers.
Our resourcing and smart services help you to realize tomorrow’s potential. Discover the amazing things possible when you bring the right people and the right technologies together.
At Halian, we recognize that diversity, equity, and inclusion (DEI) are essential to building high-performing teams for our clients. We are committed to connecting organizations with top talent from all backgrounds, ensuring that every individual feels valued, respected, and empowered to contribute their unique perspectives. We encourage applications from all qualified candidates, regardless of race, gender, disability, or any other characteristic that makes them unique. By fostering diverse and inclusive workplaces, we help our clients drive innovation, enhance collaboration, and better reflect the communities they serve.