Blockchain Platforms
Ethereum
Binance Smart Chain (BSC)
Tron
Polygon
Solana
Avalanche
Bitcoin
Programming Languages
JavaScript / TypeScript
Python
Solidity
Kotlin / Swift (for mobile)
Rust (for Solana-based wallets)
Front-End Frameworks
React.js
Vue.js
Flutter (for cross-platform mobile apps)
Back-End Technologies
Node.js
Express.js
Django
Firebase
GraphQL / REST APIs
Wallet & Blockchain Libraries
Web3.js
Ethers.js
TronWeb
BitcoinJS
WalletConnect
MetaMask SDK
Hardhat / Truffle (for smart contract dev)
Databases
MongoDB
PostgreSQL
Redis
IPFS (for decentralized file storage)
Security Integrations
AES & SHA-256 Encryption
Multi-signature support
Hardware wallet compatibility
Biometric authentication
2FA / OTP services