Web3 Backend Jobs in Toronto, Canada

As a Senior Software Engineer in the Card Engineering team, you’ll help build the foundation of Reap’s card platform—designing, developing, and operating services that power card transactions, fraud detection, card lifecycle management, and developer-facing APIs. You’ll be a key contributor in a high-ownership, cross-functional environment, working closely with product managers, designers, compliance, and other engineers. From authoring transaction workflows to implementing scalable event-driven services, your work will shape the core infrastructure used by clients, partners, and developers globally. This role is ideal for engineers who enjoy solving real-world financial problems at scale, care deeply about system correctness and resiliency, and thrive in fast-moving, collaborative teams.