Web3 & DApp Development: From Blockchain Basics to Production Contracts
Web3 is the layer of the internet built on public blockchains — where programs run as smart contracts, assets are owned by users rather than platforms, and trust is enforced by code rather than institutions. This track covers everything from how a blockchain actually stores data through writing, testing, and deploying production-grade decentralized applications on Ethereum and compatible chains.
What You Will Learn
You will start with blockchain data structures, cryptography, and how gas and transactions work, then move into Solidity — its type system, events, and common patterns. From there you will build real token standards: ERC-20 fungible tokens and ERC-721 NFTs. The toolchain gets full coverage: Remix IDE for early prototyping, Hardhat and Foundry for professional development and testing, ethers.js and web3.js for front-end integration, and OpenZeppelin for audited base contracts. Upper levels cover oracles and off-chain data, decentralized storage with IPFS, DeFi protocol mechanics and AMMs, DAO development, Layer 2 scaling, cross-chain bridges, gas optimization, and smart contract security auditing.
The Learning Path
Twenty-nine courses progress from A1 through C2. The A-level courses establish blockchain fundamentals, the EVM, wallets, and basic Solidity. B-level courses build out the full development workflow — consensus mechanisms, token contracts, professional tooling, front-end DApp architecture, and EVM internals. The track finishes at C1 and C2 with Advanced Solidity Patterns, DeFi Protocols and AMMs, DAO Development, Layer 2 and Scaling, Cross-Chain and Bridges, Smart Contract Gas Optimization, and DApp Security & Auditing.
How It Works
Each course is split into short, hands-on lessons you complete in the built-in editor with real-time feedback and an AI tutor when you get stuck. Solidity code runs against live test environments so you can see your contracts behave before deploying anywhere real.