Project Title Senior Android + Blockchain Developer Needed to Complete Multi-Chain Crypto Wallet (NEXA BULL) with MLM Integration Project Overview We are developing a multi-chain Android crypto wallet application named "NEXA BULL". The initial Android project structure and basic functionality are already developed, but several features still require completion, optimization, and full integration. We are looking for a highly experienced Android + Blockchain developer to complete the wallet and integrate it with our MLM website backend system. The wallet should function similarly to leading crypto wallets such as SafePal Wallet, Trust Wallet, and MetaMask, supporting multiple networks, tokens, live prices, and secure wallet management. Current Project Status The Android app has already been generated with: Basic project structure Wallet UI screens Initial crypto wallet logic Token list UI Some clickable functions However: Several buttons and actions are not fully functional Blockchain integration is incomplete MLM backend syncing is not implemented Token/network support needs to be expanded Real-time price tracking needs proper implementation Your task is to complete and productionize the entire system. Platform & Tech Stack Mobile App Android Kotlin Android Studio MVVM Architecture Material Design UI Blockchain Integration Ethereum Binance Smart Chain (BSC) Polygon Bitcoin APIs CoinGecko CoinMarketCap Backend Node.js + Express or Laravel (PHP) Database MySQL or MongoDB Core Wallet Features Required The wallet must function as a complete crypto wallet application. Wallet Management Create new wallet Import wallet via: Seed phrase Private key Secure seed phrase storage AES encrypted wallet data Transactions Send crypto Receive crypto QR code wallet address QR scanner Transaction history Multi-Chain Support Must support: Ethereum network Binance Smart Chain Polygon Bitcoin Token Support Import custom tokens Automatic token detection Token icons synced Token price syncing Portfolio Tracking Real-time portfolio value Price charts USD conversion Token balance display Custom Token Integration Our platform uses a custom token: NEXA BULL Token Requirements: ERC20 / BEP20 compatible Token balance display Send and receive token Contract integration Token added by default in wallet MLM Website Integration The wallet must integrate with our MLM platform. Login Users log in using their MLM account credentials. Sync Features Wallet must sync with MLM backend to: Link wallet address with MLM user ID Receive reward tokens Display MLM earnings Fetch reward points Display referral information Reward System Wallet must show: Reward dashboard Token rewards Referral earnings MLM level income Transaction logs Backend API Development Developer must also complete the backend APIs. API Requirements Secure REST API with: JWT authentication Wallet linking MLM user syncing Reward distribution Token reward sending User reward data retrieval API Stack Node.js + Express or Laravel. Security Requirements The wallet must follow production-level security practices: AES encrypted wallet storage Private keys stored only locally Biometric authentication PIN lock system Secure API communication HTTPS encryption UI Screens Required The application must include the following screens: Splash Screen Login / Register Wallet Dashboard Crypto Portfolio Token List Send Crypto Receive Crypto QR Scanner Transaction History NEXA BULL Token Page MLM Rewards Page Settings Additional Features Dark Mode Push Notifications (Rewards / Transfers) Referral Link Generator Token Import Option Network Switcher Token swap feature (future-ready architecture) Deliverables The freelancer must provide: Android App Fully functional Android Studio project Clean modular architecture Documented code Backend System Complete backend source code Database setup API endpoints Blockchain Components Smart contract example for NEXA BULL token Contract interaction integration Documentation API documentation Database schema Deployment guide App build instructions Freelancer Requirements We are only looking for experienced developers with: Strong Android development experience (Kotlin) Crypto wallet development experience Blockchain integration experience Smart contract knowledge Backend API development skills Security best practices Preferred experience with wallets like: Trust Wallet SafePal Wallet MetaMask When Applying Please Include Examples of crypto wallets or blockchain apps you built Your tech stack Estimated timeline Estimated cost Your blockchain experience Project Goal The final result should be a fully functional production-ready crypto wallet similar to SafePal or Trust Wallet, with MLM reward integration and custom token support.