Developer – Interfaces

Are you a developer who builds for scale and impact? Help shape the future of safety and security tech.

About Entelec

Entelec is in a unique phase: we combine the power and stability of an established organization with the energy, speed and mentality of a startup. Although we have been leaders in building PSIM software for over 30 years, we operate today with a renewed vision, an agile approach and an international ambition to reshape our market.

With our own platform Sky-Walker, we integrate security, safety and building management systems into one powerful solution. We help organizations worldwide work smarter, automate processes and increase their operational reliability in a technological landscape that changes faster than ever.



We are active from Belgium, the Netherlands, France and the United Kingdom — but we think, build and grow as one international team, with the drive of a startup within a larger whole. We are renovating our products, strengthening our processes, building a growing partner network and investing fully in the future of Smart Buildings and Smart Cities.

Do you want to be part of an organization that combines the solid foundation of an established player with the freedom and impact of a startup environment? Join us and help build our mission: "Building Software That Matters.

To support our continued growth, we are looking for a Medior/Senior Developer – Interfaces to strengthen our Development team in Diepenbeek.

In this role, the focus is not on developing the core application, but on integrating external subsystems. You will dive into the underlying behavior of security, safety, and building management solutions and translate this into high-quality, robust, and future-proof integrations.

Each integration is built using an existing SDK or API. Strong technical insight, analytical thinking, and attention to quality are essential to implement these connections correctly and reliably.

You will work closely with other developers, QA, and external technology partners, playing an important role in ensuring quality, performance, and security.

About you

• You hold a Bachelor’s or Master’s degree in Computer Science, ICT, Industrial Engineering, or equivalent through experience.
• You have at least 3–5 years of experience as a software developer.
• You have strong experience with C# and .NET.
• You are comfortable working with SDKs and APIs and understand the importance of correct contracts and error handling.
• You have knowledge of Microsoft SQL Server and Azure DevOps.
• You have experience with secure development and secure coding principles.
• You work according to SCRUM / Agile methodologies and document your work in a structured way.
• You are analytical and solution-oriented, and enjoy diving into complex problems.
• You can work independently and take initiative.
• You communicate clearly and enjoy working in a team.
• You are fluent in Dutch and English; French is a plus.
• Experience with security, safety, or building management systems is a strong asset.

• Design and build subsystem integrations
• You analyze external systems and create stable integrations using SDKs and APIs.
• Understand underlying systems
• You develop in-depth knowledge of how external platforms function, including their limitations and edge cases, to ensure predictable and reliable integrations.
• Write high-quality, maintainable code
• You develop scalable, readable, and high-performance code following best practices.
• Focus on reliability and security: You apply secure coding principles and consider data protection, error handling, and robustness.
• Collaborate across teams: You work closely with Development, QA, and Product Owners to implement and test integrations correctly.
• Code reviews and quality assurance: You review colleagues’ code and actively contribute to high quality and security standards.
• Testing and troubleshooting: You contribute to unit and integration testing and resolve technical issues, performance challenges, or integration errors.
• Documentation: You provide clear technical documentation to ensure integrations remain maintainable and transferable.
• Agile way of working: You actively participate in stand-ups, sprint planning, and retrospectives, contributing to a culture of continuous improvement.
• Coaching (Senior): As a Senior, you guide less experienced developers and actively share knowledge around integrations and system architecture.

• A permanent full-time contract
• A technically challenging role focused on complex integrations
• The opportunity to work in a family business with an international presence
• A high level of autonomy and impact within your role
• Opportunities for growth, training, and knowledge sharing
• Flexible working hours
• 32 days of annual leave (full-time)
• A competitive salary package with fringe benefits (laptop, mobile phone + subscription, group insurance, and hospitalization insurance)

Office Location

Starting Time

Interested?