SeniorProductEngineer,ReactNative+Backend

About Base Base is a platform for in-real-life social connection and community. Our Members are accomplished people who have built careers, families, and reputations. They come to Base for what their calendars are missing: regular, in-person time with peers they actually want to know. The gathering is the product. The systems that make it possible are what this role exists to protect. Engagement Contract: 2 to 4 week paid audit, with the option to extend into implementation. About the Role We are looking for a senior, hands-on engineer to audit and stabilize a consumer mobile product and its internal admin tool, HomeBase. The current system spans React Native, TypeScript, backend APIs, database-driven booking and payment workflows, notifications, and Metabase reporting. This is not a greenfield build. We need someone who can quickly understand an existing codebase, identify architectural and execution risks, separate real problems from noise, and produce a practical recovery plan. What You'll Do - Audit the React Native and TypeScript mobile app and the related HomeBase admin flows - Review backend and API structure, database models, and the business logic around bookings, guests, cancellations, refunds, credits, and notifications - Identify technical debt, broken workflows, security risks, stale code, and missing tests - Review Linear and project artifacts, and compare planned work against actual implementation - Produce a prioritized technical recovery plan - Ship or supervise one small but meaningful stabilization fix during the engagement - Recommend the exact team needed to continue: mobile, backend, data, QA, design, or fractional CTO Must Have - Senior or staff-level experience with React Native and TypeScript - Strong backend experience with APIs and relational databases - Experience with payments, refunds, booking systems, marketplaces, memberships, or operational and admin tooling - The ability to read messy code and make judgment calls quickly - Strong wr