Our Client is seeking a Senior GIS Developer to support the upgrade of business-critical GIS applications from legacy Geocortex technology to the next-generation VertiGIS platform .

The successful candidate will provide senior technical leadership in the design, development, integration, testing, implementation, and support of enterprise GIS solutions. This role requires strong experience with Esri technologies, VertiGIS/Geocortex, Microsoft Azure, GIS infrastructure modernization, and web application development.

Key Responsibilities

Lead the analysis, design, development, integration, testing, and implementation of GIS applications

Upgrade existing Geocortex applications to the supported VertiGIS platform while preserving current functionality

Design and develop scalable GIS web applications and supporting services

Provide senior technical expertise across all phases of the Systems Development Life Cycle

Translate business requirements into technical designs and specifications

Develop integrations with enterprise GIS data, geoprocessing services, portals, databases, and external systems

Support GIS infrastructure, networking, cloud modernization, and application deployment activities

Provide technical leadership, project coordination, effort estimates, progress updates, and implementation support

Troubleshoot production issues and support incident-management activities

Develop and maintain installation guides, technical documentation, build books, and support procedures

Mentor junior technical resources and provide guidance on development standards and best practices

Ensure solutions align with GO-ITS standards, AODA requirements, security expectations, and service-delivery objectives

Mandatory Requirements

Robust Experience With GIS Software Suites, Preferably ArcGIS

VertiGIS

Geocortex

FME





Experience With Esri s ArcGIS Enterprise Technology Stack, Including

ArcGIS Pro SDK

File Geodatabases

ArcGIS Enterprise Portal

ArcGIS Server

ArcGIS Image Server

ArcGIS Notebooks

Experience developing GIS web applications using JavaScript, TypeScript, HTML5, and CSS

Experience with Microsoft Azure, GIS infrastructure, networking, modernization, and maintenance

Experience with Python, VBA, .NET, C++, C#, SQL, and software development kits

Knowledge of service-oriented architecture, microservices, and web services

Experience working with REST APIs, JSON, and AJAX

Strong experience gathering requirements and translating business documentation into technical specifications

Experience developing complex applications using relational and multidimensional databases

Experience leading technical activities throughout the full SDLC

Communication and Leadership

Ability to communicate complex technical concepts to non-technical audiences

Experience collaborating with business stakeholders, developers, business analysts, project managers, and technical teams

Ability to resolve technical issues and build consensus on project direction

Experience leading development or application-support teams

Strong analytical, problem-solving, documentation, and decision-making skills

Additional Assets

Experience with Ontario Public Sector projects

Experience within the Land and Resources I⁢ Cluster

Knowledge of GO-ITS standards and government project-gating processes

Knowledge of Information Management principles, policies, and practices

Experience with cloud deployment, preferably Microsoft Azure

Understanding of GIS spatial data, geoprocessing, analysis, and enterprise mapping solutions

Experience supporting Commercial Off-the-Shelf and custom enterprise applications

Knowledge of accessibility requirements, including AODA

📌 GIS Developer (Toronto)
🏢 Teckhorizon
📍 Toronto