Jesper Kristensen (jtk.eth)

I'm Jesper Kristensen, and this channel is where Web3 developers go to actually understand what's under the hood. We build things from scratch by hand, line by line, until the magic is gone and only understanding is left.

🎯 CURRENT FLAGSHIP: "The Complete Guide to RPC for Web3 Developers" — a 12-episode deep dive into the layer every dApp, wallet, and indexer depends on (and almost no developer ever looks at). We build a JSON-RPC server with our bare hands, talk to Ethereum mainnet raw, and go all the way down.

📚 ALSO ON THE CHANNEL:
• EVM internals — opcodes, storage layout, pure Yul
• ABI encoding and calldata, constructed by hand
• Smart contract security — real hacks, real defenses
• Solidity from fundamentals to the dark corners

💻 Every episode ships with runnable code on GitHub — clone it, break it, learn from it.

📖 Into DeFi? My comprehensive books: https://defibooks.org/

Subscribe and go deep with us. 🚀