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Questrade Financial Group

Principal Software Engineer

Toronto, ON, Canada

Base salary range: $120,000 - $140,000

Apply About employer

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Job details

Pay: Base salary range: $120,000 - $140,000
Experience: Have 8+ years of software engineering experience, including time leading technical direction on complex, business-critical systems
Posting language: English
Posted: Oct 8, 2026

Original job description

Questrade Financial Group (QFG), through its companies - Questrade, Questbank, Questrade Wealth Management, Community Trust Company, Zolo, and Flexiti, provides securities and foreign currency investment, professionally managed investment portfolios, mortgages, real estate services, financial services and more. We use cutting-edge technology to help Canadians become much more financially successful and secure.

At QFG, we combine human-centric collaboration with AI-driven innovation to redefine financial services. The ideal candidate will be a catalyst for change, using AI to transform and deliver unparalleled customer experiences and shaping a future where AI empowers our teams to do their best work.

Join our diverse, inclusive, and hybrid workplace to unleash your creativity and nurture your curiosity without limits. If you share this sense of infinite possibility, come shape your future at QFG.

What’s in it for you as an employee of QFG?

Health & wellbeing resources and programs
Paid vacation, personal, and sick days for work-life balance
Competitive compensation and benefits packages
Work-life balance in a hybrid environment with at least 3 days in office
Career growth and development opportunities
Opportunities to contribute to community causes
Work with diverse team members in an inclusive and collaborative environment

This job posting is for an existing vacancy.

We’re looking for our next Principal Software Engineer. Could It Be You?

We are building a modern, in-house loan origination platform that takes a secured loan from application to funding: intake, underwriting, mortgage insurance, fulfillment, allocation and funding. It handles real money and real regulatory obligations, and it is changing quickly as we add new lending programs and bring AI into how we build and operate.

As a Principal Software Engineer, you will be the senior technical authority on this platform. You will set architectural direction, raise the engineering bar, and stay close to the code. We want someone with strong product instincts, who cares about what we build and why as much as how.

Need more details? Keep reading…

In this role, responsibilities include but are not limited to:

Owning the architecture and technical roadmap of the secured lending origination platform, balancing delivery speed with correctness, auditability and resilience
Writing and reviewing production C# and .NET code, and set the standard for how the team builds
Applying Domain-Driven Design to model complex lending workflows, keeping bounded contexts clean as the business grows
Designing and evolving event-driven services on GCP and Kubernetes, using CQRS where it fits, with reliable messaging and integrations with internal and external partners
Driving test-driven development and a strong automated testing culture, including end-to-end coverage with Playwright
Continuously finding better ways to leverage AI to improve efficiency and optimize outcomes, both in how the squad builds (tools like Claude Code across design, build, test and review) and in the origination platform itself
Setting the guardrails that keep AI-accelerated delivery safe and repeatable, and delivering AI-powered capabilities in the lending workflow, such as document handling, decision support and operational automation
Using AI to reduce manual effort for underwriters, fulfillment and operations teams, with clear human oversight where decisions affect clients
Shaping how AI is used across the full delivery lifecycle, from requirements and design through testing, release and production support, and measure the efficiency gains it delivers
Owning production health with Datadog: dashboards, monitors, tracing, incident response and continuous reliability improvements
Partnering with Product, Credit Risk, Operations and Compliance to shape the roadmap and turn lending policy into reliable, testable software
Mentoring engineers through design reviews, pairing and coaching

So are YOU our next Principal Software Engineer? You are if you…

Have 8+ years of software engineering experience, including time leading technical direction on complex, business-critical systems
Have deep expertise in C# and .NET (modern .NET, ASP.NET Core, async programming, performance)
Have strong practical experience with Domain-Driven Design
Have a real test-driven development practice, including UI and end-to-end automation with Playwright
Have experience designing and running event-driven, distributed systems in production
Have hands-on experience with GCP and Kubernetes
Have experience with Datadog or comparable observability platforms for monitoring, tracing and alerting
Have real day-to-day experience with AI coding tools, a considered view on where they help and where they need guardrails, and a drive to keep finding new ways to apply AI to improve efficiency and outcomes
Have a strong product mindset: you understand the business problem, challenge requirements, and make trade-offs with customer and business outcomes in mind
Have excellent communication skills, with the ability to explain trade-offs to engineers and executives alike

Additional kudos if you…

Have experience with CQRS (and event sourcing)
Have background in lending, mortgages, banking or other regulated financial services
Have experience integrating third-party providers, such as insurers, credit bureaus and valuation services
Have experience building or integrating LLM-powered features
Are familiar with GitLab CI/CD and infrastructure as code
Have knowledge of Canadian mortgage regulation and privacy requirements

Compensation Information:

Base salary range: $120,000 - $140,000
The final compensation package will be commensurate with the successful candidate's experience, skills, and geographic location (Canada). It includes a comprehensive benefits plan and a competitive incentive (bonus) program for Full-Time Permanent roles.

Sounds like you? Click below to apply!

At Questrade Financial Group of Companies, with multiple office locations around the world, we are committed to fostering a diverse, inclusive and accessible work environment. This is an environment where individuals are treated with dignity and respect. Here, the unique skills and experience you bring will be valued. You will be supported and motivated, so that you can harness your unlimited potential. Our team reflects the diversity of the communities we serve and operate in. Having a collaborative and diverse team helps us push boundaries to bring the future of fintech into existence - not only for the benefit of our customers, but for those who build their career with us.

Questrade Financial Group of companies Applicant Tracking System utilizes artificial intelligence (AI) for application screening. The AI system operates on predetermined criteria, with final decisions subject to human review.

Candidates selected for an interview will be contacted directly. If you require accommodation during the recruitment/selection process, please let us know and we will work with you to meet your needs.

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More about this job

Responsibilities

The Principal Software Engineer will own the architecture and technical roadmap for a secured lending origination platform while setting engineering standards. They will drive the implementation of AI-powered capabilities and mentor the engineering team through design reviews and code collaboration.

Requirements

Candidates must have 8+ years of software engineering experience with deep expertise in C# and .NET. Strong practical experience in Domain-Driven Design, event-driven systems, and cloud platforms like GCP is required.

Skills

C#
.NET
ASP.NET Core
Domain-Driven Design
GCP
Kubernetes
Datadog
Test-driven development
Playwright
Event-driven architecture
CQRS
AI integration
Software architecture
Cloud computing
Distributed systems
Mentoring

Benefits

Health and wellbeing resources
Paid vacation
Personal days
Sick days
Competitive compensation
Benefits packages
Career growth and development opportunities

Visa sponsorship

Not detected in the job text

Keywords

Software Engineering
C#
.NET
ASP.NET Core
Domain-Driven Design
GCP
Kubernetes
Datadog
Test-driven development
Playwright
Event-driven
CQRS
AI
Fintech
Lending
Mortgage
Architecture
Cloud
Observability
GitLab CI/CD
Infrastructure as Code
LLM
Distributed systems
Performance tuning
Async programming
Regulatory compliance
Financial services
Mentorship
Product mindset
Automation

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