Senior Software Developer - Quality & Developer Tooling

Build something people love

Wealthsimple is Canada’s leading financial innovator. The company offers a full suite of simple, sophisticated financial products across managed investing, do-it-yourself trading, cryptocurrency, tax filing, spending and saving. Wealthsimple currently serves more than 4 million Canadians and holds over $125 billion in assets under administration. The company was founded in 2014 by a team of financial experts and technology entrepreneurs, and is headquartered in Toronto, Canada.

We're proud of what we've built — and we're just getting started. Read our Culture Manual and learn more about how we work .

About the team

Clients & Accounts Platform
The Clients & Accounts Platform domain at Wealthsimple oversees the broad and important mandate of growing our client base. We acquire and guide clients through their onboarding journey so that they can seamlessly open and fund their accounts — most often with no human intervention and in minutes, not days! We build the core onboarding SDK’s that power feature development across Wealthsimple, and maintain critical-tier services our product depends on.

Clients & Accounts OpEx

The CAP OpEx team is a dedicated engineering team within the Clients & Accounts Platform domain. As Wealthsimple scales and our platform surface area grows, this team exists to ensure we can ship code faster and more confidently, reduce the maintenance cost of our systems, and maintain world-class reliability for the critical-tier services that underpin the entire platform. CAP services handle the core client and account models that every other product team depends on, making reliability and operational excellence non-negotiable. CAP OpEx works as a liaison to the broader Infrastructure Platform org, leveraging standard tooling and processes to achieve our reliability, quality, and velocity goals.

About the role

Senior Software Developer, Quality & Developer Tooling

As a Senior Software Developer on the CAP OpEx team, you own the application-level quality and tooling layer of our platform. Where our Site Reliability Engineer owns infrastructure, deployment, and system-level observability, you own the engineering complement: end-to-end test infrastructure, SDK instrumentation, test account tooling, and the internal developer automation that makes CAP engineers faster and more confident.

You build systems that other engineers depend on — not shipping product features to end users, but building the platforms and pipelines that let your colleagues do so safely at scale. This means thinking in systems, caring deeply about developer experience, and moving fluidly across the full stack: frontend SDKs, backend services, CI/CD. You're comfortable in a TypeScript/React codebase instrumenting an SDK one day and writing a backend script to automate a manual operational workflow the next.

You bring a deeply AI-native approach to your work beyond surface familiarity. You've made agentic coding tools like Claude Code a core part of your development workflow, and you can point to concrete ways they've multiplied your output. You have strong instincts for which problems AI can automate extremely well (rolling out analytics event wrappers across components, expanding e2e test coverage, scaffolding boilerplate tooling at scale) and you proactively design your systems and workflows to take advantage of that. You ask first "how could this be automated?" before reaching for the long way around.

Key areas you'll own and grow:

• End-to-end testing platform - Architect and own CAP's e2e test suite across web and React Native mobile. This is framework architecture work: runner configuration, CI integration, test standards, and reliability at scale.

• SDK observability & instrumentation - Instrument our Account-Opening SDK with standardized analytics events and structured logging, leveraging React hooks and context patterns to give Wealthsimple visibility into frontend onboarding flows.

• Test account & staging tooling - Own and evolve CAP's staging and production test account tooling so every team at Wealthsimple can reliably create accurate test accounts for every environment. CAP owns account creation, we should own test account creation too.

• Developer automation - Build internal tools and automation that cut manual operational work across the CAP domain: feature flag cleanup, automated triage, AI-powered developer workflows, and whatever the team's highest-leverage opportunities turn out to be.

• Quality gates & coverage - Drive shift-left quality practices: mutation testing, code coverage improvements, and CI gates that catch issues before they reach production.

Requirements:

• Demonstrated experience building developer tooling, test frameworks, or internal platforms. Not just using them; you've designed and owned the systems themselves

• Strong proficiency in TypeScript/JavaScript with hands-on experience in React and/or React Native contexts, particularly building shared libraries, SDKs, or instrumentation rather than product UIs

• Backend development experience (Ruby, Python, Go, or equivalent) and comfort working across APIs, databases, and service-layer code

• A quality engineering mindset. You think about testability, observability, and reliability from the start, not as an afterthought

• An AI-native approach to your craft. You use agentic coding tools as a core part of your workflow, not a novelty, and have a genuine track record of using them to move faster and smarter on the problems they're well-suited for

• Nice to have: experience designing and implementing end-to-end or integration test frameworks across web and mobile

• Nice to have:experience instrumenting frontend SDKs with analytics or observability tooling, or building analytics event pipelines

Within 1 month, you'll:

• Learn about the foundations of Wealthsimple, and our current goals for the future that you will start to shape.

• Meet other new Wealthsimplers in your onboarding group and key people from each department, to start to build relationships across the company.

• Gather an understanding of our technology by pair-programming with your teammates and attending engineering onboarding sessions designed and presented by your peers.

• Have an assigned buddy within your team that will assist you in getting up-to-speed with our architecture and current projects.

Within 3 months, you'll:

• Learn Wealthsimple’s technical stack and apply our development patterns and best practices through your work.

• Buddy up for your first on-call rotation to help identify and resolve production issues and bugs clients have experienced.

• Contribute and support work in a new or existing product and share your work with the team.

• Learn how to query our data to measure the impact of your work.

• Support over a million clients on their financial journey by shipping your first project or feature in a secure, and scalable way.

Within 6 months, you'll:

• Reliably ship new features to our clients, following our best practices such as shipping daily, writing automated tests and monitoring.

• Contribute to or lead the technical design of a project, while understanding how it will shape our future architecture.

• Collaborate with other developers on the team while mentoring and providing continuous feedback via code reviews.

• Develop a big picture perspective and understand how our tools and frameworks come together. You’ll feel comfortable contributing to various codebases.

Within 12 months, you'll:

• Lead your first project: planning, scoping and regularly communicating progress to stakeholders to ensure the quality and timelines.

• Have provided leverage to our engineering teams by shipping new best practices and tools for all to benefit from.

• Have worked closely with our product and design teams, contributing your own feedback and opinions on design and UX.

Why Wealthsimple?

Top-tier health benefits and life insurance

Long-term group savings with employer match, through Wealthsimple for Business

20 vacation days, 4 wellness days, and unlimited sick and mental health days per year

✈️ 90 days away: work outside Canada for up to 90 days per year

Employee resource groups, including Rainbow (2SLGBTQ), Women of WS, and Black at WS

We are a hybrid team with over 1,500 employees across North America. The people are one of the best parts of working here: you'll collaborate with incredibly talented, curious, and driven teammates who are deeply committed to doing great work.

ICYMI

Technology & Innovation at Wealthsimple: We move quickly and build thoughtfully. That means we're always looking for better ways to work — whether that's new tools, AI, or rethinking how we approach a problem. We don't expect you to have all the answers, but we do expect curiosity and a willingness to evolve alongside the products we're building.

Inclusion Statement: We're building products for a diverse world, and we need a diverse team to do it well. We strongly encourage applications from everyone, regardless of race, religion, colour, national origin, gender, sexual orientation, age, marital status, or disability status.

Accessibility Statement: We're committed to an accessible hiring experience. If you need any accommodations throughout the interview process, please let us know — we'll work with you to make sure you have what you need. We also welcome any feedback on how we can better accommodate candidates with accessibility needs.

AI in Hiring: We may use artificial intelligence (AI) tools to support parts of our hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our team but don't replace human judgment – all final hiring decisions are made by people. If you have questions about how your data is used, reach out to us.