Senior GIS Developer

Our Client is seeking an experienced Senior Front-End Software Developer with strong expertise in GIS web mapping applications, ESRI technologies, and JavaScript/TypeScript development. The successful candidate will design, develop, customize, and deploy interactive web mapping solutions using VertiGIS, Geocortex, and ArcGIS technologies.

The ideal candidate will have hands-on experience customizing GIS viewers, integrating mapping services, developing responsive user interfaces, and delivering accessible applications in complex enterprise environments.

Key Responsibilities

• Design, develop, customize, and maintain interactive GIS web mapping applications.

• Build and extend mapping functionality using JavaScript, TypeScript, React, HTML, and CSS.

• Customize GIS viewers using VertiGIS Studio Web SDK, Geocortex Viewer for HTML5 SDK, and ArcGIS Maps SDK for JavaScript.

• Develop and deploy customized GIS viewers, mapping tools, and workflows based on business requirements.

• Configure and integrate ESRI Experience Builder, Web AppBuilder, VertiGIS Studio, and Geocortex Essentials.

• Integrate ArcGIS REST APIs, ArcGIS Server services, and ArcGIS Portal into web applications.

• Develop responsive, cross-browser-compatible, and accessible user interfaces.

• Ensure compliance with AODA and WCAG 2.0 Level AA accessibility standards.

• Collaborate with business stakeholders, technical teams, and subject matter experts to gather requirements and deliver solutions.

• Perform coding, debugging, unit testing, troubleshooting, and application maintenance.

• Support application deployments, integrations, migrations, and post-implementation activities.

• Prepare technical documentation and participate in design reviews and walkthroughs.

Must-Have Skills

• Hands-on experience customizing web mapping applications using one or more of the following:

  • VertiGIS Studio Web SDK (preferred)

  • Geocortex Viewer for HTML5 SDK

  • ArcGIS Maps SDK for JavaScript (formerly ArcGIS API for JavaScript)

• Strong experience developing GIS web mapping applications using JavaScript/TypeScript.

• Experience with ESRI GIS technologies and web mapping platforms.

• Strong knowledge of HTML, CSS, responsive web design, and cross-browser compatibility.

• Experience integrating GIS services through ArcGIS REST API, ArcGIS Server, and ArcGIS Portal.

• Ability to develop, customize, test, and deploy enterprise-level web applications.

Preferred Qualifications

• Experience with VertiGIS Studio Web and Workflow.

• Experience with Geocortex Essentials, ESRI Experience Builder, or Web AppBuilder.

• Knowledge of React or similar modern JavaScript frameworks.

• Experience configuring GIS application workflows, permissions, and user roles.

• Experience developing accessible applications compliant with AODA and WCAG standards.

• Experience working with the Ontario Public Service (OPS) or broader public sector.

• Familiarity with Agile development methodologies and the software development lifecycle.

• Strong analytical, troubleshooting, communication, and problem-solving skills.

• Ability to work independently and collaboratively with cross-functional teams.