Software Development Engineer II

About the Role:
As an SDE-II at Fulfil, you own features, not tickets. That means taking a problem from first principles all the way to production: designing the data model, building the backend service, wiring the frontend, writing the tests, and keeping it healthy after it ships.Our platform handles millions of orders and financial transactions for some of the fastest-growing eCommerce brands. You'll work inside a large, mature Python codebase and ship changes that merchants feel the same day.Location:Toronto, ON (in-office during onboarding; hybrid 3 days/week in office after)Type:Full-TimeExpected Start Date:ImmediatelyWhat You’ll Do:Build and ship web application features end-to-end: backend, API layer, and frontend, without handing off to specialistsOwn what you build in production: monitoring, debugging, and fixing issues when they surfaceDesign and maintain REST and GraphQL APIs across a platform with 600+ endpointsIntegrate LLM-powered features (OpenAI, Anthropic) into merc...