Joshua De Leon
GIS System Engineer with 2+ years of experience in large-scale spatial data processing, automated spatial ETL pipelines (Python/Shell), modern web mapping, and applied remote sensing. Specialized in interactive mapping, enterprise GIS systems, PostGIS, and cloud-deployed custom GIS platforms such as mobile and QGIS Plugins.
Experience
TopMap Solutions
Technical Co-Founder (Hybrid)
Philippines
Aug 2025 - Present
- Co-founded and led the technical architecture of a modern enterprise GIS platform, building a backend-first Django/PostGIS system for secure storage, processing, and management of large-scale spatial datasets.
- Developed automated spatial ETL pipelines and cloud-native deployment workflows using Python, GDAL, and Docker to support scalable and cost-efficient geospatial operations.
- Built GIS integrations including a custom QGIS plugin and a Flutter mobile application enabling offline/online data synchronization and field-to-cloud GIS workflows.
Land Homes Texas Real Estate
Geospatial Web Developer (Remote)
Texas, USA
Nov 2025 - Feb 2026
- Designed and executed automated spatial ETL pipelines to ingest and manage over 10M GIS parcel records using PostGIS and Dockerized Supabase.
- Improved web mapping performance by implementing vector tile workflows using Mapbox.
- Developed custom geospatial editing and spatial analysis tools using Geoman and Turf.js for construction-related spatial calculations.
Ceres AI
GIS and Remote Sensing Analyst (Remote)
San Francisco, California
April 2024 - Nov 2025
- Increased SEA team processing speed and accuracy by 40% through optimized GIS and remote sensing workflows.
- Georeferenced 50+ drone mosaic datasets daily with 95% spatial accuracy.
- Digitized and maintained 100+ agricultural field shapefiles per month within the geospatial database.
Department of Agriculture XI
RSBSA Enumerator/Georeferencer (On Site)
Davao del Norte, Philippines
April 2024 - Nov 2025
- Identified and registered 2,000 local farmers into the regional database by hand
- Validated 500 hectares of farmland using field GPS surveys
Education
University of SouthEastern Philippines
Master of Science in Land and Water Engineering
Philippines, Davao
2023 - Present
University of SouthEastern Philippines
Bachelor of Agricultural and Biosystems Engineering
Philippines, Davao
2018 - 2022
Skills
Geospatial & GIS
- QGIS
- ArcGIS
- GeoServer
- GDAL/OGR
- pyQGIS
- ArcPy
- Geopandas
- QSWAT
- HECHMS/HECRAS
Web Mapping
- Mapbox
- MapLibre
- Leaflet
- OpenLayers
- Deck.gl
- Turf.js
- ArcGIS SDK
- Google Map API
- GeoServers
Backend & ETL
- Python
- Django
- FastAPI
- Supabase
- Docker
- Bash/Shell
- DuckDB
- PostGIS
- SQLite
Frontend
- React
- Next.js
- TypeScript
- Alpine.js
- DaisyUI
- Tailwind
Remote Sensing
- Google Earth Engine
- SAGA GIS
Mobile and Custom GIS
- PyQT5
- PyQGIS
- Flutter
- Dart
Cloud and Deployment
- Vulter
- Digial Ocean
- Vercel
- BackBlaze