Senior GIS Systems Developer (ArcGIS) – Hybrid | Ghent, Belgium-DTT000124

Senior GIS Systems Developer (ArcGIS) – Hybrid | Ghent, Belgium Location: Ghent, Belgium (Hybrid) Contract Start: 3 August 2026 Contract End: 12 July 2027 Application Deadline: 7 July 2026 We are looking for an experienced senior GIS systems developer to support the ongoing development, administration, and optimization of a large-scale ArcGIS environment. This is an exciting opportunity to work on enterprise GIS solutions, leveraging the latest ESRI technologies to enhance GIS operations within a major public-sector organization. The successful candidate will combine strong software development expertise with deep knowledge of enterprise GIS infrastructure and ArcGIS administration. Key Responsibilities Develop, maintain, test, and debug enterprise GIS applications. Support and enhance GIS operations built on the ArcGIS platform. Administer and manage ArcGIS Enterprise environments. Configure and maintain ArcGIS Portal and ArcGIS Online. Perform ArcGIS Enterprise installations, upgrades, troubleshooting, and architectural improvements. Develop and optimize geospatial solutions using ArcGIS Pro and related technologies. Work with geocoding, vector and raster datasets, spatial data transformations, and database queries. Apply ArcGIS best practices, including server infrastructure, monitoring, load balancing, logging, patching, and update management. Collaborate within Agile development teams and provide technical leadership where required. Support operational management and continuous improvement of GIS platforms. Required Skills & Experience Minimum 5 years of experience developing GIS systems. Minimum 6 years of experience as an ArcGIS platform administrator. Strong experience with: ArcGIS Enterprise ArcGIS Portal ArcGIS Online ArcGIS Pro Proven experience with: Geocoding Vector and raster graphics Spatial data processing and rescaling Database querying within GIS environments Experience managing ArcGIS Enterprise environments, including: Installation Upgrades Troubleshooting Architecture Strong Windows Server administration experience. Experience implementing ArcGIS infrastructure best practices. Experience with IDP (Identity Provider) integration. Excellent programming skills, including coding, testing, and debugging. Fluent Dutch language skills (CEFR Level C2). Preferred Qualifications Experience with: Geocortex Vertigis Kibana Monitoring Agile software development methodologies ITIL best practices Work Arrangement Hybrid working model Remote work available based on internal agreements Full-time assignment (100%) Approximately 2,000 working hours throughout the contract If you are a senior GIS professional with extensive ArcGIS expertise and enjoy working on enterprise-scale geospatial platforms, we would love to hear from you.