Freelancer profile translated to English.
Back to original languageAbout Jean-Kelly
Web Developer | GIS Expert, PostGIS and Webmapping 🗺️
Are you looking to transform your data intohigh-performing interactive maps**? I design fast, intuitive, and user-adapted **Web GISapplications.
With over 4 years of experience ingeomaticsandWeb GIS development**, I design and develop custom **interactive mappingapplications (Leaflet/MapLibreandPostGIS), from technical architecture to business interface.
My goal is to deliver maps thatload quicklyand are actually used, with concrete results such as an80% reduction in loading timeand **a 95% adoption rate**.
Among my recent projects:
My approach isturnkey**, with stable, maintainable, and scalable deliverables. Each map is designed for **performanceand **user experience**.
Technical Stack: Leaflet, PostGIS, PostgreSQL, GeoServer, MapServer, Martin, QGIS, OpenLayers, Maplibre, GDAL/OGR, JavaScript, TypeScript, PHP, WebGL.
If you are looking for aGISandwebmapping expertcapable of guaranteeing **performance and adoption**, I would be delighted to discuss with you.
Contact me, I **respond in less than an hour**.
French
Native or bilingual
English
Native or bilingual
Créole haïtien
Native or bilingual
Can work on-site
Paris (up to 50km), Bordeaux (up to 50km), Nantes (up to 50km), Lyon (up to 50km), Marseille (up to 50km)
Experience
- PYROVIGILWeb Developer | GIS Expert | AutomationCONSULTING AND AUDITSDecember 2025 - December 2025Toulon, France→ Mission Objective:Develop a complete GIS POC integrating rights management, business consultation, and advanced mapping tools.→ Achievements:
- Creation of user rights management (Basic, Premium, Admin) improvingsecurity**, **application performance**, and **perceived qualityon a **GIS tool**, while optimizing **geospatial data visibility**.
- Implementation of centralized access to the OLD business module to streamline **GIS navigation**, reduce information access time, and reinforce **geomatic workflow consistency**.
- Development of an advanced OLD consultation interface + PDF export (PEI, parcels, surfaces) improving **map accuracy**, **field productivity**, and **geographic data value**.
→ Technical Stack:Bootstrap, JavaScript, PHP, Leaflet, PostGIS, PMTiles, QGIS - Agex BEWeb Developer | GIS Expert | AutomationCIVIL ENGINEERINGOctober 2025 - March 2026 (5 months)Ajaccio, France→ Mission Objective:Design a responsiveWeb GISPOC to optimize cemetery management and the consultation of plots, concessions, and deceased individuals.→ Achievements:
- Development of an interactive mapping interface (Leaflet**, **JavaScript) with advanced search and plot visualization → improved data visibility, increased accuracy, and optimized **UX**.
- Optimization ofGISqueries (PHP**, **PostGIS) for querying concessions and deceased individuals → significant time savings, improved performance, and smooth consultation.
- Creation of a responsive design (Bootstrap).
- Multi-municipality automation → enhanced admin autonomy, high perceived quality, and simplified deployment.
→ Technical Stack:JavaScript, Leaflet.js, PHP, PostGIS, Bootstrap, HTML/CSS - SPHERE SUPPORTWeb Developer | GIS Expert | AutomationAVIATION AND AEROSPACEJuly 2025 - Today (10 months)Paris, France→ Mission Objective:Design, optimize, and enhance aGISMVP for light aviation, integrating performance calculations, map analysis, and pilot assistance tools.→ Achievements:
- Full-stack development inReactandLeafletfor a fluid and interactive mapping UI.
- Implementation of dedicated business modules: dashboard, map layer management, measurement tools (distance & bearing in NM).
- Design of a **complete backoffice**: obstacle management (CRUD + roles), data migration, and validation.
- Creation of aPythonscript allowingautomaticimport and conversion of AIXML 5, Shapefile, or GeoJSON into vector format, storing them in a dedicatedPostgreSQL/PostGIStable.
- Creation of aPythonscript allowing on-the-fly trajectory generation based on navaids stored in **PostgreSQL/PostGIS**.
- Development of the route save/load system, compatible with permissions and associated with runways/airports.
- Addition of anofflinefeature (IndexedDB + automatic email sending upon reconnection).
- Implementation of a self-hosted elevationAPIon a VPS.
- Implementation of an advancedautorouting module**: **automaticrouting algorithm (SID, beacons, radials), optimized route generation (direct, bearing/distance, radial intersections), with preview and user validation, MSA (Minimum Safe Altitude) constraints management and safety margins, export inGEOJSON+ flight instruction generation.
- Modular and performant architecture: intensive calculations in Web Workers and caching system.
→ Technical Stack:React, Leaflet, PostGIS, Javascript, Node.js, PMTiles, QGIS, Python
Reviews
Jeremy
2ms-it
Reviewed on 7/8/2025
Jean-Kelly precisely identified all the weak points of my Web GIS site and proposed a clear and structured action plan. Thanks to him, I understood what I was currently losing, and what I could truly gain by applying his recommendations. I recommend him 1000%, and I will not hesitate to work with him again to implement his Web GIS optimization advice!
Recommendations
+1
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Education
- Master Expert in Information Systems DevelopmentYnov Campus - BordeauxMastère Expert en développement de systèmes d'Information banque & assurance
- Professional Bachelor's Degree, Geomatics Engineering for Spatial PlanningIUT Paul Sabatier - Toulouse, Auch, Castres2022Licence professionnelle, Génie Géomatique pour l'Amenagement du Terriotoire