Senior Flutter + Django Developer Needed to Complete AI-Powered Retail Shopping App

I'm looking for an experienced developer to take over an existing AI-powered retail shopping application that is approximately 85–90% complete. This is not a project to build from scratch. The application is functional, the architecture is already in place, and I'm looking for someone who can quickly understand the existing codebase and begin completing the remaining work. Technology Stack Flutter (iOS & Android) Django + Django REST Framework PostgreSQL React Admin Panel OpenAI pgvector FAISS Sentence Transformers Firebase OneSignal Google Maps Twilio About the App The application helps shoppers create shopping lists that automatically organize products inside grocery stores and retailers. The AI prediction system combines: Existing product/location database Product aliases Canonical product matching Similarity search Historical aisle data OpenAI only when necessary The goal is to provide accurate aisle predictions while minimizing AI costs and keeping predictions fast. Current Status The project already includes: Flutter mobile app Django backend APIs PostgreSQL database React admin panel AI prediction pipeline Authentication Push notifications Shopping lists Subscription support Advertisement system The remaining work is primarily: Bug fixes Performance optimization AI prediction improvements UI polish Production hardening Subscription verification Push notification improvements Final App Store & Google Play release preparation What I'm Looking For I'm looking for someone who has experience with: Taking over existing codebases Flutter Django / Django REST Framework PostgreSQL React OpenAI APIs AI optimization Performance tuning Production mobile app releases First Milestone Your first task will be to: Get the project running locally Become familiar with the architecture Review the existing implementation while working on the first assigned issues Provide feedback if you discover any significant architectural concerns I'm not looking for a lengthy consulting engagement or a week-long audit. I'd rather pay for progress and real improvements to the application. When Applying Please include: Examples of projects where you took over an existing codebase. Your experience with Flutter, Django, PostgreSQL, and React. Any experience with OpenAI, embeddings, vector search, or semantic search. Whether you personally will perform the work. Links to one or two relevant projects. Budget My remaining budget for this phase of the project is somewhere around $1,500. If you believe that isn't realistic, please explain what you think can reasonably be accomplished within that budget. I'm looking for someone interested in building a long-term working relationship if this phase goes well.