Freelance GIS Developer

adesso is a leading European IT consultancy with strong roots in Germany and a fast-growing presence in the Benelux. We support our clients end-to-end in their digital transformation journeys, combining deep technical expertise with industry know-how. For upcoming projects, we are expanding our freelance network with experienced GIS Specialists.

Preferred start date: flexible

Location: Belgium, hybride

Languages: ENG + Dutch OR French

Your role

As a Freelance GIS Specialist, you will work on challenging client projects in sectors such as utilities, infrastructure, public sector, logistics, and asset management. Depending on the assignment, you may be involved in analysis, design, implementation, or optimization of GIS solutions.

Typical responsibilities include:

• Designing, configuring, and maintaining GIS solutions

• Working with geospatial data models, databases, and integrations

• Developing and optimizing GIS applications and workflows

• Supporting clients with spatial analysis, visualization, and reporting

• Collaborating with architects, developers, and functional consultants

• Contributing to workshops, assessments, or proof-of-concept activities

Your profile

We are looking for freelancers who bring both technical depth and consulting mindset:

• Strong experience as a GIS Specialist or GIS Developer

• Hands-on knowledge of tools such as ArcGIS (Pro / Enterprise), QGIS, PostGIS, or similar

• Experience with spatial databases and data integration (e.g. SQL, Python)

• Familiarity with system integrations (e.g. ERP, asset management, or other enterprise platforms) is a plus

• Comfortable working in complex, multi-stakeholder environments

• Able to communicate clearly with both technical and business stakeholders

• Fluent in English; Dutch and/or French is a strong advantage

Why join adesso Belgium?

• Access to interesting and long-term projects with well-known clients

• Professional collaboration with experienced adesso teams in Belgium and across Europe

• Clear communication, transparent agreements, and a pragmatic way of working

• Flexibility in contract setup (remote / hybrid, project-based or time & material)

• Opportunity to build a long-term partnership with adesso