Software Developer- Front End - Senior (ESRI/GIS)

Job Title: Software Developer- Front End Senior (ESRI/GIS)

Location: Toronto

Work Model: Onsite

Duration: 2 months

Extension: 1 Time

Must Haves

• Experience customizing mapping applications using:
• VertiGIS Studio Web SDK (preferred)
• GeoContext Viewer for HTML5 SDK
• ArcGIS Maps SDK for JavaScript (formerly ArcGIS API for JavaScript)

Description / Responsibilities / Skills

ESRI/GIS Developer Project Summary

• The AFFES Portfolio Team-which includes Business Analysts, Developers, Business Area Leads, and a Team Lead-is seeking an experienced ESRI/GIS Developer to support migrating our existing GeoCortex mapping application to the VertiGIS platform.
• The goal is to have 90% of the application migrated and functional by April 1, 2026, ahead of the fire season.
• Migrating existing tools and features from GeoCortex to VertiGIS Studio
• Adding new functionality for the 2026 fire season, including an hourly Fire Weather Index (FWI) layer with interpolation
• Collaborating with the team to design, build, and deploy web-based GIS tools tailored to operational needs

Responsibilities

• Designing, developing and implementing front end code including user interface interactions and creating attractive and effective user interfaces
• Required to translate technical systems specifications into working, tested applications.
• This includes developing detailed programming specifications, writing and/or generating code, compiling data-driven programs, maintaining, and conducting unit tests.
• Resolves and troubleshoots technical problems which arise during the use and operation of software packages, including technical assistance in implementation, conversion and migrations

Experience & Skill Set Requirements

SDK Customization and Web Mapping Development 30%

• Experience developing and extending features within web mapping applications using JavaScript/TypeScript and modern frameworks such as React
• Proven ability to build and deploy customized GIS viewers and tools tailored to end-user requirements

ESRI Platform and Application Builders 25%

• Proficiency with ESRI-based application builders, including:
• VertiGIS Studio (Web and Workflow) (preferred)
• Geocortex Essentials
• ESRI Experience Builder and Web AppBuilder
• Experience integrating workflows and external services into map viewers
• Familiarity with user roles, permissions, and application deployment within the ESRI ecosystem

Technical and Integration 30%

• Experience consuming and interpreting GIS services using:
• ArcGIS REST API
• ArcGIS Server (including familiarity with publishing services)
• ArcGIS Portal (including administration and integration)
• Strong skills in web technologies including:
• JavaScript / TypeScript
• HTML and CSS for UI customization and responsive design

Accessibility 10%

• Experience developing and designing intuitive, simple-to-use interfaces
• Experience developing and coding web UI components that are compliant with the Accessibility for Ontarians with Disabilities Act (AODA) and WCAG 2.0 Level AA

Public Sector Experience 5%

• Experience working with the Ontario Public Service (OPS) or broader public sector, with a demonstrated track record of delivering value in complex, multi-stakeholder environments