Senior Software Developer, Edge

Senior Software Developer, Edge BUILD SOMETHING PEOPLE LOVE Wealthsimple's mission is to help everyone achieve financial freedom – by making financial services simple, transparent, and low-cost. We're Canada's largest fintech, trusted by over 3 million clients with more than $100 billion in assets. We move fast, we own our work, and we care deeply about the people using our products. If that sounds like you, keep reading. 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 TEAM The Edge team sits at the intersection of Wealthsimple's backend ecosystem and our client applications. We own the GraphQL gateway and the public API, along with the tooling, patterns, and best practices that help all our product developers ship features quickly and reliably. Reporting to a Senior Manager of Software Development, you'll work alongside developers and cross-functional partners to shape our APIs and how data flows through our systems. This year, we're leading Wealthsimple's migration from schema stitching to GraphQL Federation—a foundational shift that will make our gateway faster, more predictable, and essentially maintenance-free. ABOUT THE ROLE We're looking for a Sr Software Developer who can guide complex technical initiatives across the finish line while making other developers more effective. You'll help us implement our big project this year, GraphQL Federation architecture. We need someone who can lead delivery, partnering with teams across the company to migrate dozens of services to a federated model. You'll balance hands-on coding with technical leadership, unblocking teams, refining our approach as we learn, and ensuring we ship a gateway that product teams never have to think about. WHAT YOU'LL DO - Contribute to our GraphQL Federation migration, working with GraphQL Mesh and Hive Gateway to move services from schema stitching to a fully federated supergraph. - Build and improve automation tooling, including AI-assisted migration scripts, that accelerates schema transformations. - Partner with backend teams to help them adopt federation patterns and resolve technical blockers. - Improve gateway performance and observability, contributing to our shared GraphQL libraries. - Create documentation and share knowledge that helps product teams adopt patterns without needing specialized expertise. - Mentor junior team members and participate in code reviews that raise the bar for API quality. SKILLS YOU BRING - Strong experience with GraphQL, including schema design and performance considerations. - Familiarity in API design patterns across REST and GraphQL, with the ability to provide direction on how internal and client-facing APIs should evolve, what standards to adopt, and when to break from them. - A track record of delivering technical work that spans multiple services, with the ability to coordinate dependencies and maintain momentum. - Solid software development fundamentals, with experience building and maintaining production systems. Experience with Ruby or Node.js is a plus. - Clear communication skills and a collaborative approach—you bring people along through documentation and genuine partnership. - A pragmatic approach to technical decisions, balancing ideal solutions with shipping impact. 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 ... (truncated, view full listing at source)