Digital Solutions Developer

The Primary Construction Team consists of ACCIONA Infrastructure Canada Inc. (ACCIONA) and Amico Major Projects Inc. (Amico), as Trillium Guideway Partners (TGP).

What is the project?
The Ontario Line (“OL”) is a fully integrated, stand‑alone, rapid transit system that connects Ontario Science Centre to the Exhibition and Ontario Place grounds. The Northern Civil, Stations and Tunnel (“NC”) project consists of approximately 7 kms of underground subway and elevated guideway, with stations along the segment providing connections to surface bus and streetcar routes. The NC project has been divided into two main progressive design‑build contracts: (1) the Elevated Guideways and Stations Contract (“EGS”) and the Pape Tunnel and Underground Station Contract (“PTUS”), with supporting Early Works.

What is the Opportunity?
We are seeking an Digital Solutions Developer with strong software development and cybersecurity expertise to rapidly build secure internal applications, automations, and integrations using modern development practices and AI-assisted coding tools.eking an Digital Solutions Developer with strong software development and cybersecurity expertise to rapidly build secure internal applications, automations, and integrations using modern development practices and AI-assisted coding tools.

Responsabilities:

Develop secure internal applications, web tools, automations, dashboards, APIs, and integrations to support TGP business operations.

Work with business and IT stakeholders to identify opportunities for automation, process improvement, and custom application development.

Rapidly prototype and develop solutions using modern software development practices and AI-assisted coding tools.

Use LLMs and AI coding assistants to accelerate development, troubleshooting, testing, documentation, and code optimization.

Review, validate, and secure AI-generated code before it is implemented or deployed.

Design and implement secure authentication and authorization using technologies such as Microsoft Entra , OIDC, OAuth 2.0, and SAML.

Apply secure‑by‑design principles, including least privilege, role‑based access control, secure credential management, data protection, and appropriate logging and auditing.

Conduct code reviews and identify security vulnerabilities, insecure dependencies, exposed credentials, improper access controls, and other application risks.

Develop and integrate REST APIs, databases, Microsoft 365 services, SaaS platforms, and other enterprise systems.

Test, troubleshoot, maintain, and continuously improve internally developed applications.

Evaluate new AI development tools, frameworks, and technologies and identify opportunities to improve development efficiency.

Maintain appropriate technical documentation and ensure solutions can be supported by the broader IT team.

You’ll bring to the Team (Knowledge, Skills, Competencies)

Strong understanding of software engineering fundamentals, including application architecture, APIs, databases, version control, testing, debugging, and maintainability.

Strong knowledge of application security and secure software development practices.

Practical knowledge of authentication and authorization, including Microsoft Entra , OIDC, OAuth 2.0, SAML, RBAC, claims, scopes, and access tokens.

Experience developing and securing web applications and REST APIs.

Advanced practical experience using LLMs and AI coding assistants such as Claude, ChatGPT, Git Hub Copilot, Cursor, or similar tools.

Ability to effectively prompt and direct AI coding tools while critically evaluating their output for correctness, security, and quality.

Ability to quickly learn unfamiliar technologies, APIs, frameworks, and platforms.

Strong analytical and problem‑solving skills with the ability…