GIS Web Developer - Esri​/React Specialist; Remote

GIS Web Developer - Esri/React Specialist

Location:

Remote

At Codvo, we are committed to building scalable, future-ready data platforms that power business impact. We believe in a culture of innovation, collaboration, and growth, where engineers can experiment, learn, and thrive. Join us to be part of a team that solves complex data challenges with creativity and cutting-edge technology.

We re seeking a GIS Web Developer with strong Esri ArcGIS and React experience to expand our natural language GIS platform. You ll work on integrating spatial analysis with business intelligence, implementing advanced query workflows, and building intuitive map-based visualizations.

• GIS/Mapping:
  ArcGIS REST API, Feature Services, OAuth 2.0
• Frontend:
  React 18.2, Leaflet 1.9, esri-leaflet
• Backend:
  Node.js, Express, SQLite
• AI/NLP:
  OpenAI GPT-4 Turbo integration
• Spatial Operations:
  Haversine distance, buffer analysis, proximity queries

• Version Control:
  Git/Git Hub
• Deployment: AWS/Azure (planned)
• Database: SQLite (26 contracts, 43 tracts)

• Spatial Query Implementation
• Implement new query types (polygon intersections, multi-layer queries)
• Optimize ArcGIS REST API performance
• Build complex WHERE clause generators from natural language
• Map Visualization
• Create interactive Leaflet-based visualizations
• Implement custom feature styling and popups
• Build proximity buffers and distance calculations
• Data Integration
• Connect GIS features with contract/business data
• Build efficient data pipelines (SQLite → ArcGIS → Frontend)
• Implement caching strategies for query results
• Performance Optimization
• Reduce API call latency
• Implement client-side filtering for follow-up queries
• Optimize geometry rendering for 40+ features

• Spatial drawing tools (polygon queries)
• Real-time collaboration features
• Multi-layer spatial analysis
• Export to GeoJSON/Shapefile/CSV
• Mobile app development (React Native)

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

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

• Can explain complex spatial concepts simply
• Writes clean, maintainable code
• Understands when to optimize vs. when to ship
• Comfortable reading and improving existing codebases

• Thinks about user experience first
• Balances client-side vs. server-side operations
• Knows when to use caching vs. real-time queries
• Can debug spatial data issues (overlapping geometries, projection mismatches)

• Documents code and architectural decisions
• Can explain technical tradeoffs to non-technical stakeholders
• Comfortable working with remote teams

• Only knows ArcGIS Desktop (Arc Map/ArcGIS Pro) with no web API experience
• Can t explain REST APIs or asynchronous Java Script
• No experience building user-facing applications
• Uncomfortable with modern JavaScript frameworks
• Expects to work in isolation without collaboration

• Built a web mapping application from scratch
• Contributed to open-source GIS projects
• Can demo a spatial query interface you ve built
• Excited about AI/LLM integration
• Understands tradeoffs between different mapping libraries
• Has optimized ArcGIS REST API performance before