Senior Software Engineer - AI Experiences at Sardine

<p style="min-height:1.5em"><strong>Who we are:</strong></p><p style="min-height:1.5em">Sardine is the leading agentic risk platform for fighting financial crime. Our integrated solution unifies data across risk teams to help organizations stop fraud in real time, prevent AI-driven attacks, and automate fraud and AML operations. Sardine’s platform is strengthened by one of the fastest-growing fraud consortiums in the market, spanning more than 6 billion profiled devices, 800 million consumers, and 3 million businesses worldwide. Leading companies including FIS, GoDaddy, Intuit, Edward Jones, ZoomInfo, and <a target="_blank" rel="noopener noreferrer nofollow" href="http://Checkout.com"><u>Checkout.com</u></a> rely on Sardine to secure and grow trust in their products.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em"><strong>Our culture:</strong></p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">We have hubs in the Bay Area, NYC, Austin, Toronto, and São Paulo. However, we maintain a remote-first work culture. #WorkFromAnywhere</p></li><li><p style="min-height:1.5em">We hire talented, self-motivated individuals with extreme ownership and high growth orientation. </p></li><li><p style="min-height:1.5em">We value performance and not hours worked. We believe you shouldn't have to miss your family dinner, your kid's school play, friends get-together, or doctor's appointments for the sake of adhering to an arbitrary work schedule.</p></li></ul><p style="min-height:1.5em"></p><p style="min-height:1.5em"><strong>Location:</strong> </p><p style="min-height:1.5em">Remote — Canada (Eastern Time) To be considered for this position, you must reside in one of the following locations and be legally authorized to work in Canada:</p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Ontario</p></li></ul><p style="min-height:1.5em"></p><p style="min-height:1.5em"><strong>About the Role:</strong> </p><p style="min-height:1.5em">As a frontend-focused Senior Software Engineer, you will own the design and delivery of the user-facing experiences at the heart of our AI products. Your primary focus is building polished, performant, production-grade interfaces in React and TypeScript. You'll also work in Go on the backend services and APIs that power those experiences, but that's a secondary part of the role. This is a high-autonomy, high-leadership position: you'll develop new features at scale, set the standard for how we build on the frontend, mentor the engineers around you, and use AI/agentic tooling (like Claude) to ship far faster than a traditional team would. The ideal candidate pairs exceptional frontend craft with the judgment to lead and the discipline to be relentlessly efficient with modern, AI-assisted workflows.</p><p style="min-height:1.5em"></p><p style="min-height:1.5em"><strong>What you'll be doing:</strong></p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Design, build, and own user-facing features i