JavaScript developer building wallet-safety tools for Web3. Node and Express on the back end, React on the front, ethers v6 for the chain. Self-taught, shipping in public.

Repo

Enter a wallet address and see every ERC-20 approval it has given out, with unlimited approvals flagged.

• Express backend pulls approval logs with eth_getLogs, scanning the last 300 blocks in 10-block chunks
• Reads the live allowance, decimals and symbol for each token and spender pair
• Flags unlimited approvals (MaxUint256 and max uint96)
• Server errors return a fixed message, never the raw provider response. I leaked an API key that way once, rotated it and closed the hole.
• React frontend, running on Sepolia for now

Next: wallet connect, then a simulator that shows what a transaction will do before you sign it. I'm building that part after a run-in with a drainer contract.

Live · Repo

A live crypto dashboard on the CoinGecko API that tracks prices and market data in real time. Deployed on Render. Its 27-second demo was shared by a CoinGecko PM (post).

More in my repositories.

• Language: JavaScript
• Back end: Node.js · Express · EJS · REST APIs
• Front end: React
• Database: PostgreSQL
• Web3: ethers v6 · Alchemy

• X: @maleficboss
• LinkedIn: usman-ayomide-267849207
• Email: oyebamijiusmanayomide@gmail.com

Open to freelance and contract work.