I need landing page and multi wallet function

# Senior Web3 Frontend Developer

**Location:** Remote

**Type:** Contract/Freelance

**Budget:** $3,000 - $6, 000

**Timeline:** 3-6 weeks

## **About FHEGuess**

FHEGuess is a groundbreaking privacy-preserving number guessing game built with Zama's FHEVM (Fully Homomorphic Encryption Virtual Machine) technology. Players submit encrypted guesses that remain completely hidden throughout the game, ensuring true zero-knowledge gameplay where no one - not even the game host - can see the guesses until results are revealed.

**🎮 How it Works:**

- Players guess numbers between 0-100 during odd hours (13:00, 15:00, 17:00...)

- All guesses are encrypted on-chain using advanced FHE technology

- Results are revealed during even hours (14:00, 16:00, 18:00...)

- Closest guess to the secret number wins

**🔗 Current Status:**

- Smart contracts deployed and functional on Sepolia testnet

- Basic React frontend with wallet integration

- Express backend with MongoDB ready for integration

- Needs full-stack Web3 integration and feature completion

## **Project Requirements**

We need an experienced Web3 frontend developer to integrate our blockchain game with traditional backend services, creating a complete gaming platform with enhanced user experience and social features.

## **What We Need**

### **Frontend Integration**

- **Wallet Connection Enhancement** - Multi-wallet support (MetaMask, WalletConnect, Coinbase)

- **Real-time Updates** - WebSocket integration for live game state

- **Error Handling** - Comprehensive transaction error management

- **Loading States** - Professional loading indicators and transaction status

- **Mobile Optimization** - Responsive Web3 interactions

### **Backend Integration**

- **User Management** - Connect wallet addresses to user profiles

- **Game Statistics** - Track player performance and game history

- **Leaderboards** - Real-time ranking system

- **Social Features** - Player following, achievements, notifications

- **Analytics** - Game performance and user behavior tracking

### **Web3 Features**

- **Multi-chain Support** - Prepare for mainnet and L2 deployment

- **Gas Optimization** - Implement gas estimation and optimization

- **Transaction Management** - Queue, retry, and status tracking

- **Event Listening** - Real-time blockchain event processing

- **Wallet State Management** - Persistent wallet connection handling

## **Required Skills**

### **Core Web3 Expertise**

- **3+ years Web3 development** experience with production dApps

- **Ethers.js/Web3.js** - Advanced blockchain interaction skills

- **Wallet Integration** - Multi-wallet support and connection management

- **Smart Contract Interaction** - ABI handling, event listening, transaction management

- **Gas Optimization** - Understanding of gas mechanics and optimization techniques

### **Frontend Skills**

- **React/TypeScript** - Modern React patterns and TypeScript proficiency

- **State Management** - Redux, Zustand, or Context API for complex state

- **Real-time Features** - WebSocket, Server-Sent Events, or similar

- **Responsive Design** - Mobile-first development approach

- **Error Handling** - Comprehensive error boundaries and user feedback

### **Backend Integration**

- **API Integration** - RESTful API consumption and error handling

- **Database Operations** - Working with user data and game statistics

- **Authentication** - JWT, session management, wallet-based auth

- **Real-time Communication** - WebSocket or similar for live updates

## **Technical Stack**

### **Frontend**

- **React 19** with TypeScript

- **Ethers.js 6** for blockchain interactions

- **Vite** for build tooling

- **TailwindCSS** for styling

### **Backend**

- **Node.js/Express** API server

- **MongoDB** for user data and statistics

- **WebSocket** for real-time features

- **JWT** for authentication

### **Blockchain**

- **Ethereum/Sepolia** testnet deployment

- **FHEVM** for encrypted gameplay

- **Hardhat** for smart contract interaction

## **Key Features to Implement**

### **User Experience**

1. **Seamless Onboarding** - Easy wallet connection and account creation

2. **Game Dashboard** - Personal statistics, game history, achievements

3. **Social Features** - Follow players, view leaderboards, share results

4. **Real-time Updates** - Live game state without page refresh

5. **Mobile Experience** - Full functionality on mobile devices

### **Technical Features**

1. **Multi-wallet Support** - MetaMask, WalletConnect, Coinbase Wallet

2. **Transaction Management** - Status tracking, retry mechanisms, gas estimation

3. **Event Processing** - Real-time blockchain event handling

4. **Data Synchronization** - Sync blockchain data with backend database

5. **Performance Optimization** - Efficient API calls and state management

## **Deliverables**

1. **Integrated Frontend** - Complete Web3 frontend with backend connectivity

2. **User Management System** - Registration, profiles, authentication

3. **Real-time Features** - Live updates, notifications, game state sync

4. **Mobile-Responsive Design** - Full functionality across all devices

5. **Documentation** - API integration docs and deployment guide

6. **Testing Suite** - Unit tests for critical Web3 functionality

## **Preferred Experience**

- **Gaming dApps** - Experience with blockchain gaming projects

- **DeFi Protocols** - Understanding of complex Web3 user flows

- **Real-time Applications** - WebSocket, live data, and state synchronization

- **Mobile Web3** - Mobile wallet integration and responsive design

- **Performance Optimization** - Large-scale dApp optimization experience

## **Project Phases**

### **Phase 1: Core Integration (Week 1-2)**

- Multi-wallet connection system

- Backend API integration

- User registration and profiles

- Basic game statistics tracking

### **Phase 2: Enhanced Features (Week 3-4)**

- Real-time updates and notifications

- Leaderboards and social features

- Mobile optimization

- Advanced error handling

### **Phase 3: Polish & Testing (Week 5-6)**

- Performance optimization

- Comprehensive testing

- Documentation and deployment

- User acceptance testing