Fullstack Developer (Flutter + Node.js) – Debug App (AI-Assisted, Max 62h) -- 2

I need an individual fullstack developer (Flutter frontend + Node.js/PHP backend) to debug and stabilize my app. AI assistance is allowed, but all fixes must be verified manually, fully tested, and auditable.

Scope / Core Issues:

WebSocket / chat: reconnection logic, sync, error handling

Wallet persistence: app forgets wallet on restart

Balance update delay: refresh required

Transaction history: wrong API endpoints, missing logs

QR scanner: missing for sending funds

Crypto backend APIs inactive: register, create, restore, tokens, notifications


Requirements:

Maximum 62 hours, preferred less

Tasks will be audited

Clear documentation and testing required

Individual developer only – no teams


Payment:

Fixed-price milestone

Payment released after verification of fixes


Notes:

Open to competitive bids: lowest qualified bid can win

Serious applicants only.