Blockchain and Web3 Developer Roadmap

Understand how blockchains work, then write and test your first smart contracts.

7 milestones · ~185 hours total

1. 1

   How blockchains work

   ~20h

   Hashes, blocks, consensus (proof of work and proof of stake), keys and signatures.

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2. 2

   JavaScript or Python, plus Git

   ~25h

   You need a general-purpose language and version control first.

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3. 3

   Ethereum and Solidity

   ~30h

   Accounts, gas, the EVM, Solidity types, functions, events and modifiers.

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4. 4

   Build and test contracts

   ~35h

   Write an ERC-20 token and a simple voting contract using Hardhat or Foundry, with tests.

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5. 5

   Security basics

   ~20h

   Reentrancy, integer issues, access control, checks-effects-interactions.

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6. 6

   Front end and wallets

   ~25h

   Connect a web page to a wallet with ethers.js on a test network.

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7. 7

   Portfolio

   ~30h

   Deploy a project to a testnet and publish the code with a README.

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