Senior Software Developer

Metrolinx; Toronto; On-site; CAD 110,000 - 150,000; Full time

Job summary

Metrolinx, based at 277 Front Street West, seeks a Senior Software Developer (Integrations) to design, develop, and deliver scalable integration solutions across enterprise systems. This in‑office role focuses on real‑time interoperability, API development, and cloud‑based integrations with strong technical leadership.

The ideal candidate has hands‑on development experience, guides architectural decisions, and mentors junior developers while delivering secure, high‑performing systems for Transit

Qualifications

• Degree in Computer Science, Engineering, or related field.
• Demonstrated years of experience in software development with leadership.

Responsibilities

• Design, develop, test, and implement integration solutions, APIs, and enterprise applications.
• Lead technical analysis, architecture, coding, and deployment of scalable and secure systems.
• Develop and maintain system integrations across cloud and on-premise environments.
• Define and document technical specifications and interface designs.
• Collaborate with cross-functional teams, stakeholders, and vendors to deliver solutions.
• Ensure solutions align with enterprise architecture, cybersecurity, and data governance standards.
• Lead code reviews, quality assurance, and troubleshooting activities.
• Mentor junior developers and promote best practices in software development.
• Support continuous improvement, performance optimization, and system reliability.

Skills

APIs

Microservices

Event-driven

C#

.NET

Node.js

JavaScript

SQL

Redis

SignalR

REST/SOAP

Education

Bachelor's degree in CS or related field

Tools

Azure Container Apps

Azure Functions

Key Vault

ACR

Job description

Job Description

Metrolinx is connecting communities across the Greater Golden Horseshoe. Metrolinx operates GO Transit and UP Express, as well as the PRESTO fare payment system. We are also building new and improved rapid transit, including GO Expansion, Light Rail Transit routes, and major expansions to Toronto’s subway system, to get people where they need to go, better, faster and easier. Metrolinx is an agency of the Government of Ontario.

At Metrolinx, equity, diversity and inclusion are essential to living our values of serving with passion, thinking forward and playing as a team.

This role is an in‑office position based at our 277 Front Street West office location. Our team is highly collaborative, and much of our work benefits from in‑person co‑creation, relationship‑building, and hands‑on partnership with leaders across the organization.

We are seeking a Senior Software Developer (Integrations) to design, develop, and deliver scalable, high‑performing integration solutions across enterprise systems. This role supports critical platforms within Transit Operations and enterprise technology portfolios by enabling real‑time interoperability, API development, and cloud‑based integrations. The ideal candidate brings strong technical leadership, hands‑on development expertise, and the ability to translate business needs into robust technical solutions.

What will I be doing?

• Design, develop, test, and implement integration solutions, APIs, and enterprise applications aligned with SDLC best practices


• Lead technical analysis, architecture, coding, and deployment of scalable and secure systems


• Develop and maintain system integrations across cloud and on‑premise environments


• Define and document technical specifications and interface designs


• Collaborate with cross‑functional teams, stakeholders, and vendors to deliver solutions


• Ensure solutions align with enterprise architecture, cybersecurity, and data governance standards


• Lead code reviews, quality assurance, and troubleshooting activities


• Mentor junior developers and promote best practices in software development


• Support continuous improvement, performance optimization, and system reliability

What Skills and Qualifications Do I Need?

Education & Experience

• Degree in Computer Science, Engineering, or related field (or equivalent experience)


• Demonstrated years of experience in software development, including technical leadership roles.

Technical Skills

• Strong experience in integration development (APIs, microservices, event‑driven architecture)


• Proficiency in technologies such as C#, .NET, Node.js, JavaScript frameworks, SQL, Redis, SignalR, RESTful and SOAP services


• Experience with cloud platforms (Azure Container App, ACR, Azure Functions, Key Vault preferred) and DevOps/CI‑CD pipelines


• Knowledge of security protocols (OAuth2, SAML, encryption) and API management


• Experience with messaging/event streaming (e.g., Azure Event Hub, Service Bus, RabbitMQ)


• Familiarity with Agile methodologies.

Additional Assets

• Experience with enterprise systems, data platforms, or real‑time integrations


• Certifications such as Microsoft Certified Developer or Agile/Scrum credentials

We invite all interested individuals to apply and encourage applications from members of equity‑deserving communities, including those who identify as Indigenous, Black, racialized, women, people with disabilities, and people with diverse gender identities, expressions and sexual orientations.

We are always looking for great talent to join our team.

Accommodation

Metrolinx is an equal opportunity employer and committed to a diverse and inclusive workforce. We are also committed to offering reasonable accommodation to job applicants in accordance with applicable legislation. If you require assistance or an accommodation at any point during the hiring process, please contact us at: 416-202-5601 or email [e-mail].

All applicants must be legally entitled to work in Canada.

For internal applicants, with the recent implementation of the Internal Mobility Policy, the internal recruitment process has changed for non‑union roles. Candidates must be in their current role for 12 months prior to applying for another role and each applicant must be in good standing (not participating in a Performance Improvement Plan). Please review all provisions of the policy before submitting your application.

Please be advised that a Criminal Record Check may be required of the successful candidate.

Should it be determined that any background information provided is misleading, inaccurate or incorrect, Metrolinx reserves the right to discontinue with the consideration of your application.

We thank all applicants for their interest, however, only those selected for further consideration will be contacted.

WE ARE AN EQUITABLE AND INCLUSIVE EMPLOYER.