Senior Software Engineer

Questrade is on a mission to help Canadians to become much more financially successful and secure. For nearly 30 years, Questrade Financial Group has been delivering on that mission through investing, banking, mortgages, and real estate. Together, we tilt finance in favour of ambitious Canadians, creating new ways for them to seize the financial future they deserve. We're looking for people who are ready to enter their career inflection point. Mission-driven, exceptional folks that never settle. The work here is hard because the responsibility is real. If that's the standard you've been looking for, keep reading. Req # 4219 The return on your career investment Compensation and incentives built to reward the value you bring. RRSP matching of up to 6%. Health and wellness resources and programs, including $5,000 in mental health practitioner coverage. $5,000 in tuition subsidies for job-related courses, every year. 100% parental top-up, up to 26 weeks for birthing parents and 18 weeks for non-birthing parents. A hybrid environment, with at least three days in the office built for working together. Paid vacation, personal, and sick days. A community care day to give back to the causes you care about. This job posting is for an existing vacancy. We’re looking for our next Senior Software Engineer We're building the next-generation Loan Origination System for Questbank's Secured Lending business — a distributed, event-sourced platform that powers how we take a loan from application to funding. It's a microservices architecture on Google Cloud Platform (GCP), designed from the ground up with Domain-Driven Design, Event Sourcing, and CQRS. As a Senior Software Engineer on this team, you'll be a senior individual contributor who owns a domain end to end — from technical decisions, architecture, and code reviews to production incidents. You'll work across a .NET backend and an Angular frontend, shaping the technical direction of your domain and influencing architecture decisions across services. Operating in a complex, regulated financial services and mortgage servicing environment, curiosity about business context matters as much as technical skill: we need someone who thinks like an owner, understands the business problem behind the ticket, and helps shape the product rather than just executing work. The mandate In this role, you will: Own your domain end-to-end, taking direct accountability for architecture decisions, technical quality, code reviews, and production incidents. Own the technical architecture within your domain — leading design reviews and contributing to cross-team architectural decisions Build and maintain production-grade REST APIs using .NET and C#; work across the stack including micro frontend components where needed Drive resolution of technical debt while balancing short-term delivery with long-term maintainability Champion testing standards and helping define the team's test culture — unit and integration tests are expected, not optional Own incidents and production issues end-to-end; using DataDog and observability tooling as standard practice Serve as the reference point for architectural patterns like CQRS, DDD, and event-driven architecture — expected to evaluate and introduce tooling where there's clear benefit You’re ready for this mandate if you have the following qualifications Have 5+ years of senior-level experience building backend REST APIs in .NET and C# in production. Have strong expertise in software design principles and patterns, including Domain-Driven Design (DDD), Event Sourcing, and CQRS. Have experience architecting and delivering distributed, microservices-based systems with cloud infrastructure (ideally GCP) and NoSQL/MongoDB databases. Are proficient in both asynchronous (Pub/Sub messaging) and synchronous (HTTP/REST) integration patterns. Have frontend development experience with Angular or TypeScript (exposure to micro frontend architecture is a plus). Are committed to quality with a strong track record of writing unit, integration, and automated tests as part of regular delivery. Have hands-on production support and observability experience, including CI/CD workflows (GitLab) and monitoring tools (DataDog). Have a product and business mindset: curiosity about business context in a complex, regulated domain (financial services / mortgage servicing) and the ability to clearly articulate technical and architecture decisions. Are familiar with AI-assisted dev tools (GitHub Copilot, Claude, etc.) — the team actively uses these Tech stack at a glance Backend: .NET Frontend: Angular Cloud: Google Cloud Platform (GCP) Architecture: Distributed microservices, Domain-Driven Design, Event Sourcing, CQRS Communication: Async (Pub/Sub), Sync (HTTP) Testing: Automated tests across the stack; Playwright / Cypress an asset Nice to have Experience with Playwright and/or Cypress for end-to-end testing. Experience in financial services, fintech, lending, or mortgage/secured-lending domains. Experience in Micro frontend / module federation. Enter your career inflection point. Apply now. #LI-Hybrid #LI-TO1 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. Base salary range $100,000 — $130,000 CAD Technology and AI We mix human ingenuity with advanced technology. For ambitious builders like you, we provide the latest technology to enable your creativity. You'll have everything you need to build the best outcomes and products for our clients. Diversity and Inclusion At Questrade Financial Group of Companies, we’re committed to fostering a diverse, inclusive, and accessible work environment where individuals are treated with dignity and respect. Our global team reflects the diversity of the communities we serve and operate in. Accessibility statement Candidates selected for an interview are contacted directly. If you require accommodation during the recruitment or selection process, please let us know. We will work with you to meet your needs. AI in hiring Questrade Financial Group of companies Applicant Tracking System uses artificial intelligence (AI) for application screening. The AI system operates on predetermined criteria, with final decisions subject to human review.