Blockchain & Web3
How blockchains work, smart contracts, tokens, wallets and the security basics of decentralised applications.
What you are tested on
- Hashes, blocks and consensus
- Public-key cryptography and wallets
- Solidity and smart contracts
- Gas, tokens and standards such as ERC-20
- Smart-contract security
How your Blockchain & Web3 rating works
You start at 1200. Each timed, rated test moves your Blockchain & Web3 rating up or down, the way chess ratings move. Recruiters see the number and the band (Beginner, Intermediate, Advanced or Expert), so they can judge your skill before reading a résumé. See a sample profile.
Questions about Blockchain & Web3
Are there jobs in blockchain for freshers?
Fewer than in mainstream software, and the market changes quickly. Build a small contract project and learn security basics.
What should I learn first?
How hashing, keys and consensus work, then Solidity on a test network.