Senior Software Developer, Book of Record (Core Balances)

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 $155 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 https://www.wealthsimple.com/en-ca/culture and learn more about how we work https://www.wealthsimple.com/en-ca/careers. ABOUT THE ROLE We're growing the Core Balances team and looking for a Senior Software Developer to take real ownership of the services at the heart of how Wealthsimple tracks client money. You'll join a small, high-trust group of senior engineers and own meaningful scope from early on - designing and building the backend systems that track balances, reserve assets, and record financial activity in real time. It's backend-heavy, consequential work: these services sit on the critical path for nearly every product at Wealthsimple, and the rest of the company trusts them to be both fast and correct. You'll partner closely with Product and neighbouring engineering teams to turn complex financial logic into experiences that feel simple to the people relying on them. IN THIS ROLE, YOU'LL HAVE THE OPPORTUNITY TO: - Design, build, and operate the backend services that power real-time balances, reservations, and financial activity - the systems the rest of Wealthsimple trusts to be correct. - Own meaningful scope end-to-end, from technical design through to running your work reliably in production. - Solve genuinely hard problems around real-time correctness, low latency, and high availability: write paths that can't be slow, event consumers that can't fall behind, and