My Sharetribe-based marketplace runs on a custom React front end with a small Node/Express layer and an Affirm checkout flow. The platform works, but performance is holding us back: pages hesitate before rendering, and under moderate traffic the app sometimes crashes outright. I do not yet have formal benchmarks, so the very first step will be to help me define realistic, measurable targets for both load times and stability. Once we know what “fast” looks like, I need you to profile the whole stack—React bundles, Node APIs, Sharetribe Flex transactions, and the Affirm integration—and eliminate the bottlenecks that are causing the delays and crashes. Expect to dive into Lighthouse, Chrome DevTools, Web Vitals, New Relic (or a tool you recommend), database queries, server-side rendering decisions, and any memory leaks lurking in state management. Deliverables • A benchmark & KPI document that sets baseline and target numbers • A concise audit report pinpointing the root causes of slow loads and crashes • Code-level optimizations and configuration changes merged via pull request • A follow-up test suite or monitoring setup proving the agreed targets are met If you thrive on squeezing every millisecond out of React, Node, and third-party services like Affirm inside Sharetribe, you’ll feel right at home here.