I have an existing web application written in TypeScript (.ts / .tsx) with a Vite-based build. Before we open it to users I need a complete technical pass that covers four key areas: 1. Audit & bug-fix • Run through the current codebase on a clean Ubuntu VPS, surface any errors or performance issues, and push working fixes back to the repo. 2. Payment flow • Integrate Stripe for both incoming payments and automated payouts. The business rules are already mapped out; I need code, webhooks, secure key handling, and a brief hand-off note so I can update keys later. 3. Hosting & migration • Move the application (plus the existing Dupabase setup and “livable” migration scripts) onto my Ubuntu-based VPS. • Produce a concise start/stop/run document that lets a junior developer or sysadmin redeploy from scratch. 4. Mobile release • Build and publish the companion iOS and Android apps from the same codebase, ensuring they point to the new backend once live. The stack today: React, Vite, TypeScript, Dupabase, Git. If you are comfortable living in that ecosystem and can work directly on a VPS, let’s talk timeline and milestones.