Principal Software Engineer

Questrade Financial Group•Toronto, ON

7d•CA$135,000 - CA$165,000•Hybrid

About The Position

Questrade Financial Group (QFG) is seeking a Principal Software Engineer to join their diverse, inclusive, and hybrid workplace. This role combines 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. This is a hands-on role where you will define how the full stack is built, lead solution design, drive architectural decisions, and write the code that ships. You will work alongside other senior and principal engineers as peers, taking ownership from design to production. The role requires daily use of AI tools like Cursor or Claude to accelerate work and deliver at a high standard. You will translate business problems into architectures, own solutions end-to-end, and collaborate closely with engineers and product leads.

Requirements

Active daily use of AI development tools like Cursor or Claude.
10+ years of professional software engineering experience with a track record of leading technical initiatives.
Demonstrated experience leading solution design for complex systems: facilitating architecture sessions, producing design documentation, and driving teams from ambiguity to executable plans.
Strong hands-on command of TypeScript, with React and React Native (or a documented history of picking up frameworks fast).
Deep practical knowledge of Domain-Driven Design (DDD) and Event-Driven Architecture (EDA) in production, backed by strong object-oriented (OOP) fundamentals.
Ability to communicate technical decisions clearly to both engineers and product leads.
Comfortable with in-person collaboration in North York three days per week.

Nice To Haves

Experience with Angular or C# / .NET Core.
Experience with real-time technologies like WebSockets, gRPC, or Firebase.
Hands-on with Google Cloud Platform (GCP).
Complex query experience in analytical databases like BigQuery or Bigtable.
Contributions to open-source or a portfolio that demonstrates architectural thinking.

Responsibilities

Use AI tools like Cursor or Claude as part of your daily workflow to accelerate coding, design thinking, reviews, and documentation.
Lead end-to-end solution design for complex initiatives: facilitate technical discovery, define system boundaries, and produce architecture artifacts.
Make technical calls across back-end, web, and mobile, and implement them in TypeScript — React on the web, React Native on mobile.
Work in-person with engineers and product leads to translate requirements into technical strategies, surface trade-offs early, and keep solutions aligned with product direction.
Collaborate with other senior and principal engineers to align on architecture, share ownership of hard problems, and hold each other to a high bar.
Lead design and architectural reviews, produce technical documentation, and hold yourself to a high bar from first design to production.