Senior Application Developer jobs in Toronto, ON

Senior Software Developer

Your Moneris Career – The Opportunity

Build secure, reliable products and integrations that support important day-to-day operations for Canadian businesses. In this hands-on full-stack role, you will deliver features across user experience, API, data and integration layers, then support them in production.

You will work with React, TypeScript, Node.js, SQL Server and Microsoft Azure as a senior member of a cross-functional Agile team. The role offers end-to-end ownership of customer-facing features, secure interfaces and reliable transaction workflows. You will contribute to cloud delivery, automated testing, event-driven processing and production support. As your scope grows, you will shape solution design, own key integrations and mentor other developers.

Location: You will be based in our Toronto office, balancing in-office collaboration with remote flexibility.

Reporting Relationship : You will report to Manager, Software development And Architecture

Posting Type: New Position

Salary Range: The expected base salary range for this role is $100,000 - $142,000

Total compensation may also include variable or discretionary incentive components, including but not limited to bonuses and commissions. Individual job offers are determined by various factors, including experience, education, skills, certifications, and other business needs.

Your Moneris Career – What you'll do

• Lead features end to end across user interfaces, backend services, data, integrations, testing and release.

• Build customer-facing applications with React and TypeScript, including modular micro-frontend experiences.

• Design secure, maintainable REST APIs and backend services using Node.js and TypeScript.

• Integrate partner and third-party platforms using REST APIs, signed webhooks, OAuth and file-based exchanges.

• Build dependable data synchronization, scheduled processing and transaction workflows with clear retry and recovery behavior.

• Design SQL Server schemas, queries and migrations that protect data integrity and performance.

• Create automated unit, integration, API and user-interface tests using tools such as Jest and Playwright.

Contribute to Azure solutions, delivery pipelines, infrastructure as code, production support, technical design and developer mentoring.

Your Moneris Career – What you bring

Required qualifications

• 7+ years of experience building and supporting production software.

• Strong full-stack experience with React, TypeScript and Node.js.

• Experience designing REST APIs, service-based applications and integrations with internal or third-party systems.

• Strong SQL and relational data modelling skills, including database migrations.

• Automated testing experience across unit, integration and API tests.

• Experience with asynchronous or event-driven processing using Kafka or another messaging platform.

• Experience with secure authentication and authorization, a major cloud platform, Git, pull requests, continuous integration and delivery.

Preferred qualifications

• Experience mentoring developers or leading technical design.

• Experience with Azure Functions, App Services, Key Vault, managed identities or Azure API Management.

• Experience with micro-frontends, Docker, Kubernetes, Terraform or Bicep.

Experience with high-volume transaction processing, OAuth 2.0, observability, cloud data platforms, payments, fintech or another regulated industry.

Your Moneris Career –What you get

• Emphasis on Wellness - Meeting Free Fridays (MF2), company-wide holiday closure, just to name a few
• RRSP matching & defined contribution pension plan
• Flexible benefits package starting from day 1
• Thrive in a Hybrid or Remote Model - including a tech peripheral rebate!
• Extensive learning & development programs and resources - plus unlimited free access to LinkedIn Learning and Udemy courses!
• EAP (Employee Assistance Program), Educational Assistance and Recognition Program
• Employee perk program with incredible discounts for over 2,400 vendors!
• Get involved in one or many of our Moneris Committees and Employee Resource Groups - Inclusive Workplace Council (IWC), Black Employee Network, just to name a few

Learn more about how Moneris is striving to be at the forefront of Fintech! (https://www.moneris.com/en/Careers/Tech)

• #LI-Hybrid
#TECH-IND

Note: We welcome and encourage applications from Indigenous peoples, people of colour, people with disabilities, people of all genders, sexual orientation and intersectional identities.

AI Disclosure: We may use AI-enabled tools to screen, select, and assess applications. All AI outputs are reviewed and validated by our recruitment team.

We acknowledge that people from equity-deserving groups (including racialized individuals, women, gender diverse individuals, individuals with disabilities, neurodivergent individuals, members of 2SLGBTQIA+ communities and those born outside of Canada) are less likely to apply for jobs unless they feel they meet all the requirements posted. At Moneris, we believe candidates bring experience to their work in many ways. We encourage you to apply and share, in the application form, the transferrable experience you bring, and how this will support your success in this role.