Founded in 2020 in Belgium, ATS4IT is part of the Moongy Group, established to strengthen agap2IT’s presence in Europe. Since 2021 we expanded further with the opening of our Danish branch in Copenhagen, and our Spanish brand in Madrid, reinforcing our commitment to being a key player in the European technology landscape. Proximity, transparency, and collaboration define our approach at ATS. We aim to be your trusted partner and the first choice for your technological challenges

.NET Developer – GIS & ESRI Solutions

Location: Brussels, Belgium

Work Model: Hybrid (2–3 days per week on-site)

Languages: Native French or Dutch + good command of the other national language or English

Contract Type: Long-term mission

Eligibility: Candidates must possess European nationality or a valid work permit for Belgium

NOTE: Due to the high volume of applications received, candidates who do not meet the specified criteria may not be contacted

About the Role

We are looking for an experienced .NET Developer to strengthen our GIS development team. You will play a key role in designing and building digital mapping and geospatial applications, working closely with both technical and business stakeholders. This position combines backend development in .NET with front-end web technologies, as well as hands-on work with ESRI’s ArcGIS suite.

What You Bring

• Solid experience with the .NET framework and modern development practices.

• Proficiency in front-end technologies and a good sense for UI/UX.

• Experience with ESRI tools for geospatial data management.

• Familiarity with ADFS, unit testing frameworks, and DevOps tools.

• Understanding of software architecture and reusable component design.

Desirable Skills

• Experience with Oracle Spatial or FME.

• Knowledge of ArcGIS Runtime for mobile applications.

• Previous work within complex enterprise environments.

Your Main Responsibilities

• Build and enhance applications using C#, ASP.NET, Entity Framework, and WebAPI.

• Develop responsive, user-friendly interfaces with HTML5, CSS3, Bootstrap, JavaScript, and TypeScript.

• Work with ArcGIS Server, Portal for ArcGIS, ArcGIS Online, and ArcGIS Pro to deliver robust GIS solutions.

• Apply object-oriented programming principles and modern design patterns to ensure code quality.

• Contribute to continuous integration and delivery pipelines, leveraging Azure DevOps, Git, and Jira.

• Collaborate within an Agile team environment to ensure timely, high-quality deliverables.

• Support security, automation, and testing initiatives following DevSecOps best practices.

What We Offer:

• Permanent Contract (CDI) – Long-term stability.

• Attractive salary based on your experience and skills.

• Additional benefits: Meal vouchers and eco-vouchers (electronic), DKV hospitalization insurance, company laptop, holiday allowance, and year-end bonus.

• Vacation: 20 paid leave days + 12 RTT days.

• Free training (technical, behavioral, language) and certifications

• Continuous and personalized career progression support

• Opportunities to work on projects with cutting-edge technologie

At Moongy Group, we stand for equality and diversity. We create a safe and inclusive environment where opportunities are equal for everyone! We do not discriminate based on age, ethnicity, gender, disability, sexual orientation, or any factor other than merit. If you have the skills for the role, we encourage you to apply!