Senior Full-Stack Developer: Food Delivery & Video App Bug Fixes (NestJS, React Native)

We are scaling a startup application that combines a multi-app food delivery ecosystem with a TikTok-style short-form video feed. We need an expert to step in for bug fixing, API stabilization, and new feature rollouts. The Tech Stack: Backend: NestJS, Node.js, TypeScript, and MySQL. Mobile Ecosystem: 3 integrated React Native applications (Customer, Driver, and Merchant apps). Infrastructure: AWS (EC2, S3, CI/CD pipelines). What We Need You To Do (Milestone 1): Audit the existing NestJS backend and resolve critical database query bottlenecks. Fix state-management bugs across the 3 React Native applications, specifically related to the video feed performance and real-time order tracking. Prepare the architecture for upcoming feature rollouts and strict role-based access control (RBAC). Our Ideal Candidate: We are specifically looking for a highly experienced developer who has a 100% Job Success Score. You must understand clean architecture so we do not have to rewrite code later. We need someone who provides honest scoping and handles their own AWS deployments with zero-downtime CI/CD. To prove you have read the full technical requirements and are not an auto-bidding bot, please end your proposal with the phrase: "Video & Delivery Scaling"