TypeScript Developer for Backend Review

We have a sports venue booking system called KickZone. The UI/UX frontend is fully developed, and we have a complete backend built entirely from scratch using TypeScript. We need a professional developer to take over the project from our previous developer, complete specific integration tasks, and help us publish the mobile apps to both the Google Play Store and Apple App Store. Scope of Work: Code Review & Setup: Review the existing TypeScript backend source code (provided in a ZIP file) and test it locally to ensure everything works properly. Stripe Integration: Integrate Stripe as the main payment gateway for our online bookings. Configure the webhooks to automatically update booking statuses in our database upon successful payments. App Store Deployment: Build the production-ready application files and publish the final mobile apps to our Apple and Google developer accounts. Payment Terms (Milestones): To ensure a smooth collaboration, we will split the budget into 3 fixed-price milestones: Milestone 1(20%): Successfully review the code, run it locally, and confirm all features work. • Milestone 2 (50%): Complete full Stripe integration, testing it successfully in test-mode. • Milestone 3 (30%): Generate final builds and successfully publish the apps to both stores. Requirements: • Strong experience with TypeScript and Node.js backend environments. • Proven experience in integrating Stripe API and Webhooks. • Familiarity with publishing apps to Google Play and Apple App Store. • Good communication skills and commitment to deadlines. Please submit your proposal with your estimated timeline and portfolio of similar projects. Budget is limited, looking for an efficient developer for a long-term relationship for future updates.