Senior Principal Site Reliability Engineer

Senior Principal Site Reliability Engineer

5700 Yonge St, North York, ON M2M 4K2, Canada

Posted Wednesday, August 5, 2026 at 4:00 AM

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 Senior Principal Site Reliability Engineer. Could It Be You?

The Senior Principal Site Reliability Engineer is directly responsible for the stability, resiliency, and scalability of business-critical brokerage back-end applications running across a hybrid on-premises and cloud architecture.

This individual drives reliability engineering practices — SLOs/SLIs, observability, incident response, and capacity planning — while also making hands‑on, code contributions directly into multiple applications across different technology stacks using an inner‑source model. The role blends deep technical execution with cross‑team influence: this person is expected to identify systemic reliability risks, fix them where they appear, and raise the operational bar for every team they touch.

This position is a strong fit for a hands‑on senior principal engineer who is energized by fixing production reliability at the source, is comfortable navigating multiple codebases and cloud/on‑prem environments, and wants to have an outsized impact on the resiliency of a regulated, high‑availability brokerage platform.

Application Stability, Reliability & Growth

Own the end‑to‑end reliability posture of critical brokerage back‑end applications, driving measurable improvements in availability, latency, and error budgets across on‑premises and cloud environments.

Define and track Service Level Objectives (SLOs), Service Level Indicators (SLIs), and error budgets in partnership with application teams; use them to prioritize reliability work over feature work when warranted.

Lead root cause analysis and blameless post‑incident reviews for high‑severity production incidents; drive remediation items to closure and identify systemic patterns across applications.

Establish and mature observability practices (metrics, logging, tracing, alerting) so that failures are detected proactively and diagnosed quickly across a heterogeneous, multi‑stack estate.

Build capacity planning, load testing, and chaos/failure‑injection practices to validate resilience before incidents occur.

Champion a culture of operational excellence, toil reduction, and AI and automation‑first thinking across engineering teams.

Make hands‑on,…