Blockchain & Web3
13 courses 3 categories
Blockchain and Web3 covers the development stack behind smart contracts, decentralized applications, and the cryptocurrency systems that run on top of them. The category survived the 2022 crash and 2023 winter because the underlying engineering — consensus protocols, cryptographic primitives, contract languages, and wallet UX — is genuinely interesting work, and the residual industry around DeFi, stablecoins, NFTs, and tokenized assets still hires.
The dominant platforms in 2026 are Ethereum and its L2 ecosystem (Arbitrum, Optimism, Base, Polygon, zkSync), Solana for high-throughput trading apps, and Bitcoin for the original chain plus the Lightning and Ordinals layers built on top of it. Solidity remains the default contract language; Vyper, Move (Sui, Aptos), and Cairo (Starknet) have small but real niches. Foundry has largely displaced Hardhat for testing; viem and wagmi run the frontend wallet integration; The Graph indexes on-chain data.
What you'll find under this topic
- Smart contract development: Solidity, Vyper, OpenZeppelin libraries, contract upgrade patterns
- Testing and security: Foundry, Slither, formal verification, common attack vectors
- Frontend Web3: wagmi, viem, ethers.js, RainbowKit, wallet UX, EIP-712 signing
- DeFi primitives: AMMs, lending markets, oracles (Chainlink, Pyth), MEV, flash loans
- Cryptocurrencies and exchanges: trading, market structure, on-chain analytics
- Infrastructure: RPC providers, indexers (The Graph), L2 rollups, account abstraction (ERC-4337)
- Cryptography fundamentals: hashing, signatures, zero-knowledge proofs, MPC
The hiring market splits between protocol teams (Ethereum Foundation, L2 companies, infrastructure providers), DeFi product teams (Uniswap, Aave, Compound, smaller AMMs and lending markets), and the long tail of NFT, gaming, and tokenization startups. Smart-contract auditing remains one of the highest-paid niches in the industry because the cost of bugs is measured directly in dollars.
Categories (3)
Courses (13)
Showing 1 – 13 of 13 courses
Updated 11mo agoBy: Anthony GGLearn the basics of blockchain from scratch by step-by-step creating your own system.4 hours 56 minutes 12 seconds
Updated 2y agoBy: UdemyBuild Decentralized Application using VueJS and Smart Contracts written in Solidity. Learn how to create simple smart contracts. Learn how to develop Decentrali1 hour 45 minutes 9 seconds
Updated 2y agoBy: Nikandr SurkovBuild your own Telegram clicker game with a clear and simple template. You can change it fast and make it fit your idea.
Updated 2y agoBy: UdemyCreate real Smart Contracts in Solidity and DApps with React & Next JS. Understand how the Ethereum blockchain works.38 hours 47 minutes 24 seconds
Updated 2y agoBy: Udemy, Stephen GriderSmart Contracts? They're here. The Ethereum Blockchain? Covered. Solidity? Yep! There can be no understating it: Ethereum and Blockchain technology is the m23 hours 39 minutes 42 seconds
Updated 2y agoBy: UdemyBlockchain is a revolutionary technology that allows for decentralized and distributed storage of information. Maybe the hottest topic at the moment in the fiel5 hours 44 minutes 32 seconds
Updated 2y agoBy: Zero To MasteryLearn Solidity from scratch, from an industry expert. You'll learn Solidity fundamentals all the way to advanced blockchain technologies so that you'll be able12 hours 56 minutes 12 seconds
Updated 2y agoBy: UdemyLearn how to build a blockchain from scratch with Go Programming Language (Golang).5 hours 24 minutes 9 seconds
Updated 2y agoBy: Moralis AcademyCrypto trading is volatile, exciting, and potentially very profitable. This course will get you up to speed on technical analysis, risk management.6 hours 22 minutes 50 seconds 5 / 5
Updated 2y agoBy: Moralis AcademyCrypto is more than trading. DeFi allows anyone to earn financial returns on tokens through yield farming, staking, and more.4 hours 35 minutes 33 seconds
Updated 2y agoBy: UdemyThe course covers everything you need for a decentralized NFT application according to the ERC721 standard. Students of this course will learn about NFTs by cre16 hours 20 minutes 55 seconds
Updated 2y agoBy: UdemyBecome a Complete DApp Developer by learning the best in demand skills taught by renown engineer and full stack developer Clarian North. Join in early on an exc15 hours 21 minutes 24 seconds 5 / 5
Updated 2y agoBy: UdemyDo you want to be 'coding the smart contract revolution', but don't know where to start? Want to learn everything there is to know about solidity, with a 'learn23 hours 38 minutes 36 seconds
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Frequently asked questions
- Is Web3 still a viable career path in 2026?
- Smaller and more selective than the 2021 boom, but stable. Hiring concentrates around a handful of established protocols (Ethereum, Solana, Bitcoin tooling), serious infrastructure companies, and a few financial-services teams piloting tokenization. Speculative consumer dApps remain a low-trust market. Skilled Solidity and Rust engineers with security mindset still command high salaries.
- Solidity vs Rust — which Web3 language to learn first?
- Solidity for the Ethereum ecosystem and EVM-compatible chains (Polygon, Arbitrum, Optimism, Base) — by far the largest job market. Rust for Solana, Polkadot/Substrate, and a growing share of zk-rollup infrastructure. Pick Solidity if you want the broader market; Rust if you want lower competition and infrastructure-grade work.
- Do I need a strong cryptography background for blockchain work?
- Working with cryptographic primitives matters at the protocol and zk-circuit level; most application-layer smart-contract work only needs literacy — knowing what a hash, signature, and Merkle tree are. Security auditors and protocol engineers need real depth. Build practical apps first; cryptography depth can come later if you move toward zero-knowledge or core-protocol roles.
- What does a Web3 developer actually build day to day?
- Smart contracts (Solidity or Rust), the off-chain TypeScript or Go services that index events and feed frontends, wallet-aware React UIs, audit-ready tests with Foundry or Hardhat, and gas-cost reviews. Many roles look like normal full-stack work with a chain-specific persistence layer rather than the all-on-chain image marketing suggests.
- How long does it take to become a smart-contract engineer?
- 6–12 months from a strong JavaScript or systems background. The core Solidity surface is small; the hard parts are security patterns, gas optimization, and reading enough real contracts to recognise foot-guns. Plan on shipping a couple of small protocols to testnet and reading audit reports — the field rewards engineers who think adversarially.
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