Senior Fullstack Engineer

About the role

Bree, a Canadian FinTech that offers interest-free short-term loans, is hiring a Senior Fullstack Engineer in Toronto. The engineer owns meaningful product work from the initial customer problem through release and follow-up, working directly with Product, Design, CX, Operations and other engineers. The team is small but works on a product with large-scale impact on customers' access to money.

Key responsibilities

• Own the full lifecycle of a feature: discovery, technical design, implementation, testing, rollout, monitoring and follow-up.
• Work across the TypeScript and Node.js serverless backend (Lambda, API Gateway, SQS) and the React Native application.
• Make architectural decisions on service boundaries, data ownership and when to refactor versus extend.
• Instrument shipped features and hold the line on stability without slowing releases.
• Use AI coding assistants such as Codex, Cursor and Claude Code responsibly, keeping correctness, testing and quality in hand.
• Mentor other engineers through technical design, code review and cross-stack collaboration.

Required profile

• Proven experience shipping customer-facing products end to end with technical and architectural ownership.
• An AI-native development approach, using tools like Claude Code and Cursor throughout planning, implementation, debugging, testing and review.
• Track record of refactoring or modernizing existing systems, not just greenfield work.
• Strong product judgment and clear, even-keeled communication.

Required skills

• Expert-level TypeScript; fluent in Node, React/React Native, REST/GraphQL.
• Real AWS serverless experience (Lambda, SQS) or equivalent event-driven systems.
• Pragmatic testing (Jest, RNTL, Detox) wired into CI.
• Nice to have: financial products, payment systems or regulated software experience; Infrastructure as Code with Pulumi or Terraform; mobile release experience (TestFlight, Google Play, OTA updates).

What we offer

• Competitive compensation for top performers.
• Health, dental and vision benefits.
• $1,500 one-time setup and $500 per year learning and home-office stipend, plus a $1,500 annual wellness stipend.
• Free lunch in the office daily and a $250/month stipend for WFH days; fully remote in winter.
• Commuter benefits, parental leave, 20 annual PTO days plus unlimited sick days, and an annual retreat.