Senior GIS Software Engineer (.NET & JavaScript)

Maandag Nordic is looking for a Senior GIS Software Engineer within .NET and JavaScript for one of its clients, a profitable and fast-growing technology company developing a SaaS platform for managing large-scale infrastructure construction projects. The role focuses on continued development of mapping and GIS capabilities, enhancing existing functionality, and building new integrations with external GIS platforms. The engineer will work closely with the Product Owner, CTO, and development team. Responsibilities include: - Develop and enhance interactive mapping functionality for large-scale infrastructure and construction projects. - Build and maintain integrations with GIS platforms and mapping services such as ArcGIS REST Server, Vetro FiberMap, WMS, WMTS, WFS, and XYZ tile layers. - Work with geospatial data formats and GIS data management, including GeoJSON, KML/KMZ, coordinates, lines, polygons, and project boundaries. - Develop backend functionality using VB.NET/.NET Framework 4.8, ASP.NET Web Forms, ASP.NET Web API, and JSON-based APIs. - Develop frontend functionality using TypeScript and JavaScript with the Google Maps JavaScript API. - Work with SQL Server, LINQ to SQL, and data models for projects, maps, and system integrations. - Analyze, troubleshoot, and improve existing GIS workflows, import/export functionality, webhooks, and system synchronizations. - Contribute to code reviews, technical decisions, documentation, and knowledge sharing within the team. Requirements include several years of software development experience, strong interest in GIS, mapping, and geospatial technologies, hands-on experience with GIS platforms, mapping services, coordinate systems, vector and raster data, or geospatial data formats, backend development experience with .NET, preferably VB.NET or C#, SQL Server experience, and web development experience using JavaScript and/or TypeScript. Additional preferred experience includes ArcGIS, Vetro FiberMap, QGIS, PostGIS, WMS, WMTS, WFS, XYZ tiles, Tile Map Service, geofencing, spatial filtering, GDAL/OGR, geospatial data conversion, coordinate transformations, Google Maps JavaScript API, webhooks, CI/CD, Azure Pipelines, and distributed development teams. This is a long-term assignment, initially 12 months, with good possibility for extension and the end goal of recruitment by the client after the initial period.