Four companies I led or co-founded, products I started from an empty repo, and a bulk-sender that is still running. nft.multisender.app is the one that compounds (~$300k/year profit). Each row has something you can open: a repo, a product URL, an audit firm, a volume.
_products
| # | Product | Role | Years | Proof |
|---|---|---|---|---|
| 1 | Liquorice | protocol core + dashboard | 2024–26 | ~$1M/day; MixBytes + Pessimistic; ETH / Arb / Base |
| 2 | zRexFinance | contracts, backend, team | 2022–24 | github.com/zrex-finance/core-contracts, sole author |
| 3 | NFTxCards | co-founder, contracts + team | 2021–22 | Binance NFT ~$127K; Polygon Studios; Distributed Lab audit |
| 4 | Tornado Cash (PepperSec) | relayer, subgraph, CLI, Nova | 2020–22 | core team; left before OFAC; peak ~$1B TVL |
| 5 | Multisender.app | assembly-optimized bulk sender | 2020–24 | ~$800M lifetime, 40+ EVM chains |
| 6 | nft.multisender.app | founder, ERC-721 / 1155 | 2021— | ~$300k/year profit; ~$1M volume in the first 2 years; WalletConnect-verified |
| 7 | MultiCurrencyWallet | #4 contributor, ~900 commits | 2018 | in-browser BTC ⇄ ETH atomic swaps |
_stack
| Area | Tools |
|---|---|
| Contracts | Solidity, Yul / assembly, Foundry (unit / fuzz / invariant / fork), Hardhat, OpenZeppelin UUPS, ERC-20 / 721 / 1155 / 4626, EIP-712, create2, Chainlink (Data Feeds, Functions, VRF), Aave / Compound / Uniswap / 1inch integrations, Slither, Echidna |
| Frontend | TypeScript, React, Next.js (App Router / RSC), Feature-Sliced Design, wagmi / viem, RainbowKit, SIWE, Storybook, Vitest, Cypress / MetaMask E2E |
| Backend | NestJS, PostgreSQL, Redis, MongoDB, The Graph, relayers, bots, Docker, CI/CD |
| Domain | DeFi lending, leverage, intent settlement (CoW Swap, Uniswap X, 1inch Fusion, Bebop), wallets / account abstraction, ZK / privacy, NFT marketplaces |
| Chains | Ethereum, Arbitrum, Base, Optimism, Polygon, BSC + 40 other EVM; Solana, TON, Tron on side work |
_how
Same method across jobs: start from zero, write the model, find the invariants, then the perturbation that breaks them. In contracts that is the state machine and the conserved quantities. In teams it is cadence — review, Storybook, E2E in CI — so shipping is weekly, not heroic. I hire; I still write the core myself.