Senior Front-End Software Developer – GIS / Web Mapping

• Design, develop, customize, and implement front-end code for interactive web applications and GIS-based mapping interfaces.
  
• Translate technical system specifications and business requirements into working, tested applications.
  
• Customize and extend GIS mapping applications 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 application features tailored to end-user requirements.
  
• Build and enhance web UI components using JavaScript, TypeScript, HTML, CSS, and modern front-end frameworks such as React.
  
• Integrate GIS services, workflows, APIs, and external services into web mapping applications.
  
• Consume, interpret, and troubleshoot GIS services through ArcGIS REST API, ArcGIS Server, and ArcGIS Portal.
  
• Configure and extend applications using ESRI and related application-building platforms.
  
• Implement responsive designs, cross-browser compatibility, accessibility standards, and intuitive user interactions.
  
• Write, compile, test, debug, document, and maintain application code, including unit testing and troubleshooting.
  
• Participate in the software development life cycle (SDLC), including requirements analysis, application design, development, testing, deployment, implementation, and maintenance.
  
• Diagnose and resolve technical issues affecting application functionality, integration, performance, and deployment.
  
• Collaborate with IT professionals, project teams, business stakeholders, and subject matter experts to gather requirements and deliver project objectives.
  
• Conduct design walkthroughs, support implementation and migration activities, and provide post-implementation technical support.
  
• Prepare technical, user, and system documentation as required.
  
• Follow structured development methodologies, established design patterns, and information management practices.
  
• Work independently while maintaining effective communication, teamwork, and delivery commitments.
  

Requirements

• VertiGIS Studio Web SDK – preferred.
  
• Geocortex Viewer for HTML5 SDK.
  
• ArcGIS Maps SDK for JavaScript, formerly ArcGIS API for JavaScript.
  
• Developing and extending GIS mapping application features using JavaScript/TypeScript and modern frameworks such as React.
  
• Building, customizing, and deploying GIS viewers, interactive mapping tools, and web mapping features based on end-user requirements.
  
• Working with complex web mapping applications and customizing user interfaces for GIS-based solutions.
  

• VertiGIS Studio Web and VertiGIS Studio Workflow — preferred.
  
• Geocortex Essentials.
  
• ESRI Experience Builder.
  
• ESRI Web AppBuilder.
  
• Integrating workflows and external services into map viewers.
  
• Configuring and working with user roles, permissions, and application deployment within the ESRI ecosystem.
  

• JavaScript and TypeScript development.
  
• HTML and CSS for front-end development, UI customization, and responsive design.
  
• Consuming and interpreting GIS services through the ArcGIS REST API.
  
• Working with ArcGIS Server, including familiarity with publishing GIS services.
  
• Working with ArcGIS Portal, including administration and integration.
  
• Developing and maintaining front-end components for complex, large-scale web applications.
  
• Integrating APIs, external services, workflows, and data-driven application features.
  
• Cross-browser compatibility and responsive web design.
  
• Application design, coding, testing, debugging, deployment, and troubleshooting.
  
• Relational and hierarchical database technologies and information retrieval using query languages.
  
• Object-oriented and/or third-generation programming tools, application development methodologies, and communications protocols.
  

• Developing intuitive, accessible, and user-friendly web interfaces.
  
• Designing and coding UI components compliant with the Accessibility for Ontarians with Disabilities Act (AODA) and WCAG 2.0 Level AA standards.
  
• Applying accessibility principles to interactive mapping applications and web-based tools.
  
• Creating responsive interfaces with consistent usability across supported browsers and devices.
  
• Understanding user needs and translating requirements into effective front-end designs.
  

• Experience working with the Ontario Public Service (OPS) or the broader public sector.
  
• Demonstrated ability to deliver technology solutions in complex, multi-stakeholder environments.
  
• Experience collaborating with business areas, technical teams, and subject matter experts in structured project environments.
  

• Experience in programming, systems analysis, and specialized software package support at the senior level.
  
• Knowledge of structured methodologies for application design, development, implementation, maintenance, and support.
  
• Experience with application architecture, current design patterns, deployment, and troubleshooting.
  
• Ability to translate technical specifications into functional applications and maintain high-quality code.
  
• Experience developing detailed programming specifications, writing and generating code, and conducting unit tests.
  
• Knowledge of information management principles, concepts, policies, and practices.
  
• Experience with middleware, gateways, and Internet-ready applications.
  
• Familiarity with rapid application development (RAD) methodologies.
  
• Ability to review, analyze, modify, test, and debug product installation scripts.
  
• Experience supporting implementation, conversion, migration, and post-implementation activities.
  
• Ability to conduct technical design walkthroughs and prepare user and system documentation.
  

• Strong analytical, problem-solving, and decision-making abilities.
  
• Excellent verbal and written communication skills.
  
• Effective interpersonal, collaboration, and stakeholder-management skills.
  
• Ability to elicit, analyze, and document requirements from diverse business stakeholders and subject matter experts.
  
• Demonstrated ability to work independently with minimal supervision.
  
• Demonstrated ability to work collaboratively with project teams to achieve shared objectives.
  
• Strong organizational skills and the ability to meet deadlines in a project-driven environment.
  
• Ability to troubleshoot complex technical issues and recommend practical solutions.
  

• Hands-on experience with VertiGIS Studio Web SDK and VertiGIS Studio Workflow.
  
• Experience with Geocortex Viewer for HTML5 SDK and Geocortex Essentials.
  
• Experience with ESRI Experience Builder and Web AppBuilder.
  
• Experience working with ESRI-based GIS technologies and web mapping platforms.
  
• Previous Ontario Public Service or broader public-sector project experience.
  
• Knowledge of AODA and WCAG 2.0 Level AA accessibility requirements.
  
• Experience with social media APIs, external service integrations, and Internet-ready applications.
  

• Only one candidate submission is permitted for this requisition.
  
• The candidate must be available to work onsite in Toronto five days per week.
  
• The candidate should clearly demonstrate hands-on experience with GIS mapping SDK customization and ESRI-based technologies.
  
• VertiGIS Studio Web SDK is preferred.
  
• Experience with Geocortex Viewer for HTML5 SDK and ArcGIS Maps SDK for JavaScript is explicitly identified in the client's must-have requirements.
  
• The resume should clearly identify the candidate's specific GIS platforms, SDKs, frameworks, APIs, and relevant project experience.