E-commerce Admin, UI & POS Integration

I need an experienced developer to carry out several coordinated upgrades on my existing e-commerce system. 1. PHP Admin Panel The product-management area must let me update existing items more intuitively. That means revising the update logic, refactoring the related PHP views/controllers, and adjusting any database calls so new fields or validations are stored reliably. 2. Flutter Mobile App Parallel to the back-end work, the customer-facing Flutter app needs UI tweaks that mirror the revised product data structure and keep the overall look consistent with our latest branding guidelines. 3. POS Integration Our in-store POS has to feed sales, stock moves, and pricing changes straight into the admin panel. A clean, real-time sync (REST or webhook—whichever fits best) is essential so that reports stay accurate across web, mobile, and store. 4. Database Updates Any schema changes required by the new product-update flow or POS link—indexes, additional columns, or pivot tables—should be scripted and documented so I can run them safely on staging and production. 5. after all changes, deployment of the project Deliverables • Updated PHP admin code with tested product-update functionality • Flutter source with refreshed UI screens compiled and ready for Android/iOS release • Working POS ↔ admin panel synchronisation, including error-handling logs • SQL migration scripts and a short deployment guide I’ll provide current source repositories and a sample database dump once we start. Let me know your typical turnaround time for a job of this scope and any clarifications you need before diving in.