GIS Web Developer - Esri/React Specialist

Responsibilities

• Implement spatial query types including polygon intersections and multi-layer queries
• Build interactive Leaflet-based map visualizations with custom styling and popups
• Optimize ArcGIS REST API performance and reduce query latency
• Develop data pipelines connecting SQLite, ArcGIS, and React frontend
• Create natural language to SQL WHERE clause generators
• Implement client-side filtering, caching strategies, and geometry rendering optimization

Requirements

• 3+ years working with ArcGIS REST API and Feature Services
• Strong JavaScript/React experience with Hooks and state management
• Understanding of spatial concepts: coordinate systems (4326/3857), projections, buffers, spatial queries
• Experience building interactive web maps with Leaflet, Mapbox, or ArcGIS Maps SDK
• Proficiency with REST APIs and asynchronous JavaScript (async/await, Promises)
• SQL and database experience (SQLite, PostgreSQL, or similar)

Preferred Qualifications

• esri-leaflet library and OAuth 2.0 token management experience
• OpenAI API or LLM integration background
• Geospatial algorithms knowledge (Haversine, centroid calculations, polygon operations)
• Node.js/Express backend development skills
• Docker/containerization experience
• Previous GIS chatbot or natural language query work

About the Company

Codvo builds scalable, future-ready data platforms that power business impact through innovation and cutting-edge technology. The team focuses on solving complex data challenges with creativity, fostering a culture where engineers can experiment, learn, and thrive.