Sr. Product Engineer

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<h2>About Willow</h2><p style="min-height:1.5em">Willow is a telehealth company focused on personalized, responsible GLP-1-based weight loss care. We combine medical expertise with a supportive, patient-centered approach to help people feel more confident and comfortable in their bodies. Our goal is to make high-quality care accessible, thoughtful, and designed to fit real lives.</p><p style="min-height:1.5em"></p><h2>About the role</h2><p style="min-height:1.5em">We're hiring a <strong>Senior Product Engineer</strong> to own meaningful pieces of the product end-to-end. You will work across our patient, provider, and admin applications, our core API, and the underlying AWS infrastructure.</p><p style="min-height:1.5em">We are looking for an engineer who views code as a tool to solve user problems and thrives in a high-ownership environment. You should be comfortable picking up a problem that spans frontend, backend, and vendor integrations, defining the right technical shape, shipping it, and iterating based on real-world usage.</p><p style="min-height:1.5em"></p><h2>What you’ll Do</h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Build and optimize complex, state-machine-driven intake flows using React and Next.js to manage clinical eligibility and patient state.</p></li><li><p style="min-height:1.5em">Manage the scaling of our NestJS "majestic monolith" and help determine when and how to extract focused services as our domain models grow.</p></li><li><p style="min-height:1.5em">Ship strictly-typed TypeScript features across a Turborepo monorepo, ensuring high performance for our patient, doctor, and admin interfaces.</p></li><li><p style="min-height:1.5em">Design and maintain Postgres schemas and handle asynchronous job queuing (retries, idempotency) via pg-boss.</p></li><li><p style="min-height:1.5em">Connect and scale third-party integrations, including Stripe, <a target="_blank" rel="noopener noreferrer nofollow" href="http://Authorize.Net">Authorize.Net</a>, Vouched, and <a target="_blank" rel="noopener noreferrer nofollow" href="http://Customer.io"><u>Customer.io</u></a>, to power clinical and business workflows.</p></li><li><p style="min-height:1.5em">Own deployments and infrastructure health within AWS, utilizing Datadog for observability and incident response.</p></li><li><p style="min-height:1.5em">Participate in (and lead) thoughtful code reviews to maintain high standards for readability, maintainability, and test coverage across the team.</p></li><li><p style="min-height:1.5em">Document architectural decisions and API contracts to ensure the team can scale and new members can onboard quickly.</p></li><li><p style="min-height:1.5em">Proactively identify bottlenecks in the patient onboarding funnel or backend services and implement optimizations to maintain a "snappy" user experience.</p></li><li><p style="min-height:1.5em">Ensure that all features are built with security best practices in mind, particularly regarding the handling of sensitive patient data.</p></li></ul><p style="min-height:1.5em"></p><h2>What we're looking for</h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">8+ years shipping full-stack TypeScript, with real ownership of features in production.</p></li><li><p style="min-height:1.5em">Strong on React / Next.js on the frontend and a modern Node backend (NestJS, Express, or similar).</p></li><li><p style="min-height:1.5em">Comfortable in Postgres, schema design, modern ORMs, and a sense for the cost of a bad query.</p></li><li><p style="min-height:1.5em">Experience with event-driven systems: queues, retries, idempotency, distributed gotchas.</p></li><li><p style="min-height:1.5em">Real AWS fluency, you can read a container deployment spec and trace an incident without hand-holding.</p></li><li><p style="min-height:1.5em">Solid instinct for product: you care whether a feature actually works for users, not only whether it ships.</p></li></ul><p style="min-height:1.5em"></p><h2>Nice to have</h2><ul style="min-height:1.5em"><li><p style="min-height:1.5em">State-machine-first codebases.</p></li><li><p style="min-height:1.5em">Healthcare, HIPAA, or regulated-domain experience.</p></li><li><p style="min-height:1.5em">Integrating payments such as Stripe.</p></li><li><p style="min-height:1.5em">Shipping LLM-powered features in production.</p></li><li><p style="min-height:1.5em">Background in high-conversion onboarding / funnel work.</p></li><li><p style="min-height:1.5em">Minesweeper skills</p></li></ul><p style="min-height:1.5em"></p><h2>What's in it for you?</h2><p style="min-height:1.5em">As a full-time member of our team, you’ll enjoy:</p><ul style="min-height:1.5em"><li><p style="min-height:1.5em">Flexible working hours</p></li><li><p style="min-height:1.5em">Work wherever you choose.</p></li><li><p style="min-height:1.5em">Fun and casual work environment.</p></li><li><p style="min-height:1.5em">We are a diverse, global team!</p></li></ul>

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Common Interview Questions And Answers

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