RQ11557 - Software Developer- Front End - Senior

Flexstaf IT; Toronto; On-site; CAD 90,000 - 120,000; Full time

Job summary

Flexstaf IT is seeking a GIS Web Mapping Developer to customize mapping applications using VertiGIS, Geocortex, and ArcGIS SDKs. The role focuses on building features in JavaScript/TypeScript with React to deliver user‑centric GIS viewers and tools.

Responsibilities include integrating ESRI workflows, deploying map viewers, and collaborating with project teams to meet objectives in a dynamic, public-sector oriented environment.

Qualifications

• Experience customizing mapping applications with ESRI-based tools.
• Ability to work independently and in team settings.
• Familiarity with web mapping platforms and ArcGIS family services.

Responsibilities

• Develop and extend features within web mapping applications using JavaScript/TypeScript and modern frameworks such as React.
• Build and deploy customized GIS viewers and tools for end-user needs.
• Integrate workflows and external services into map viewers.

Skills

Independent work

Collaborative

ESRI GIS tech

JavaScript/TypeScript

React

HTML/CSS

Web mapping

AODA WCAG

Public sector

ArcGIS REST API

Tools

VertiGIS Studio Web SDK

Geocortex Viewer for HTML5 SDK

ArcGIS Maps SDK for JavaScript

Geocortex Essentials

ESRI Experience Builder

Web AppBuilder

Job description

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)

Experience and Skill Set Requirements

Experience and Skill Set Requirements

Desirable Skills:

• Demonstrated ability to work independently
• Demonstrated ability to work collaboratively with the project team to meet goals and objectives
• Experience with ESRI-based GIS technologies and web mapping platforms

SDK Customization and Web Mapping Development – 30%

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