Android Blockchain Developer for NEXA BULL Wallet

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.