Smart Contract Development with Solidity: Zero to Deployed

About this course

You’ve written code in Python, JavaScript, or Go. Now you’re ready to build on Ethereum — but Solidity works differently, and most tutorials skip straight to copy-paste contracts without explaining why. This course closes that gap: production-ready smart contract development across 23 lessons, each built around a concept, a worked example, and a hands-on “Try it” exercise.

You’ll start in Solidity Foundations: syntax, types, and operators; the real gas-cost difference between storage, memory, and calldata; function visibility and modifiers; and events for off-chain indexing. From there you move into Object-Oriented Solidity — inheritance, interfaces, abstract contracts, libraries, and the custom-error patterns that save gas over require/revert strings.

The core of the course is Token Standards & OpenZeppelin: you’ll build an ERC-20 token from the raw spec before rebuilding it with OpenZeppelin’s audited library, then do the same for an ERC-721 NFT — from scratch first, OpenZeppelin second — so you understand what the library does for you, not just how to import it.

Testing & Gas Optimization covers Foundry and Hardhat side by side: writing tests, fixtures, coverage, and the profiling techniques used to find and fix expensive storage layouts. Storage packing, immutables, and targeted assembly tricks round out the module.

Deployment & Verification walks you through real testnet deploys, mainnet deployment and private-key management, and Etherscan verification — plus a pre-deployment security checklist covering the vulnerabilities auditors look for first. Advanced Patterns adds UUPS and transparent upgradeable proxies, role-based access control with OpenZeppelin’s AccessControl, and reentrancy prevention using checks-effects-interactions and guards.

The course closes with a Capstone Project: design, test, and deploy a custom ERC-20 token with minting, burning, and access control — a portfolio piece, not just a quiz.

This course is for developers with programming experience in any language who know the basics but have never shipped Solidity, and who need to go all the way to a verified mainnet contract. By the end you can write correct, gas-aware Solidity; design ERC-20/ERC-721 tokens from scratch and with OpenZeppelin; test with Foundry and Hardhat; optimize gas through storage packing and immutables; deploy and verify on mainnet while managing keys safely; implement upgradeable proxies; and audit your own code for reentrancy, overflow, and access-control bugs. Includes a certificate on completion.