Joshua De Leon

GIS Analyst/Developer specializing in urban land systems, real estate intelligence, and spatial decision support. Experienced in building scalable geospatial platforms for parcel analysis, land-use planning, and development workflows using both the Esri ecosystem (ArcGIS Pro, ArcGIS JS SDK) and open-source geospatial stacks (PostGIS, QGIS, MapLibre, GeoPandas).

Co-founder Full Stack WebGIS Developer (Part-time) at TopMap Solutions (2025-11 – 2026-03)

• Led the technical architecture of a modern enterprise GIS platform, building a backend-first Django/PostGIS system for secure storage, ETL pipeline processing, and management of large-scale spatial datasets, resulting in low-cost operation.
• Lead end-to-end GIS/CAD workflows (Infralens) from PDF digitization and CAD drafting to WebGIS delivery while driving business development, client acquisition, and service growth as an independent operator
• Built GIS integrations, including a custom QGIS plugin and a Flutter mobile application, enabling offline/online data synchronization and field-to-cloud GIS workflows.

Geospatial Web Developer (Remote) at Land Homes Texas Real Estate (2025-11 – 2026-02)

• Designed and executed automated spatial ETL pipelines to ingest and manage 10M+ GIS parcel records using PostGIS and Dockerized Supabase, resulting in smoother loading of parcels.
• Improved web mapping performance by implementing vector tile workflows using Mapbox, saving time to ingest spatial data.
• Developed custom geospatial editing and analysis tools using Geoman and Turf.js for accurate construction-related spatial calculations, allowing their construction team to do live planning.

GIS and Remote Sensing Analyst (Remote) at Ceres AI (2024-04 – 2025-11)

• Increased SEA team processing speed and accuracy by 40% through optimized GIS and remote sensing workflows through leadership and mentoring junior teammates.
• Georeferenced 50+ drone mosaic datasets daily with 95% spatial accuracy.
• Digitized and maintained 100+ agricultural field shapefiles per month within the geospatial database.

GIS Researcher and Map Maker (Hybrid) at Freelance Map Maker (2024-02 – 2025-11)

• Delivered geospatial analysis for 20+ scientific research projects across agriculture, hydrology, and urban studies.
• Calibrated 5 hydrological flood models for engineering and planning clients using HECRAS and HECHMS for precision flood inundation.
• Managed an urban land-use GIS project for a government agency such as CLUP and Parcel Tax.

MSE in Land and Water Engineering – University of Southeastern Philippines (2023)

BS in Agricultural and Biosystems Engineering – University of Southeastern Philippines (2018 – 2022)