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@LedgityLabs @Athena-ins @Zepto-Button @tickie-io @mona-nft @cast-labs @coin-district-blockchain @langailabs @buff-x

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vBlackWhale/README.md

Victor Blackwell · blackwhale.eth

Senior Smart Contract Engineer · Solidity / EVM · Tokenization, Security & Full-Stack

I build the on-chain core of financial products, and stay until they are audited, shipped and used.

Twitter LinkedIn Portfolio Book a call

 

$16M+ live TVL on platforms I engineer and operate 15+ products shipped for clients and funds 6 zero-to-one protocols led solo EVM full-time since 2021

About

Security work starts on day one of every build: fuzz and invariant testing before features, static analysis and gas profiling as routine, audit-ready documentation written along the way. Most of my work is on tokenized assets, DeFi/RWA platforms, smart wallets and trading infrastructure.

  • Tokenization · issuance-to-settlement design: reserve-attested minting, transfer restrictions and eligibility gating, corporate actions, epoch/NAV settlement. ERC-20/4626/7540, working knowledge of ERC-3643 and the ERC-1400 family.
  • Security & testing · Foundry property-based/invariant/fuzz suites, Slither, Tenderly, external audit preparation and traceable findings remediation (on both sides of the audit).
  • Smart wallets · on-chain WebAuthn (P-256) and RSA verification, factories and multi-signer modules, EIP-712/1271.
  • Full-stack delivery · React/Next.js/Nuxt interfaces with typed contract hooks and simulate-first transaction pipelines, Node.js APIs, deployment and verification pipelines (Hardhat + Foundry).

AI-assisted engineering under systematic human review: no keys, addresses or sensitive logic ever exposed to external services.

🇫🇷 French · 🇬🇧 English · 🇪🇸 Spanish · 📍 Paris, France

Selected work

Project What it is My role
Ledgity Yield Tokenized investment products backed by real-world assets · $3.3M TVL · Ethereum, Base, Arbitrum, Sonic, Hedera, Linea Solo lead: protocol v2 (ERC-4626 + Chainlink CCIP), full app surface, security & QA
Destral Investment platform with passkey smart wallets · $12.5M TVL Lead smart contracts: WebAuthn/RSA wallets, managed vaults with epoch NAV, token/staking/vesting
BuffX Tokenized RWA vault platform · ERC-7540 async vaults Solo lead: async vault protocol, beacon-proxy upgrades, zapper flows
Athena Decentralized insurance marketplace · Ethereum mainnet · externally audited (2024, response & fixes in repo) Solo over 3 years: cover market-making with Uniswap-v3-style ticks, Kleros claim arbitration
NFT Recovery Tool Open-source CLI to batch-rescue NFTs from compromised wallets Author

More on trebuchet.systems · references and live product links on request.

Tech Stack

Solidity Foundry Hardhat TypeScript React Next.js NodeJS PostgreSQL Docker GCP AWS

Pinned Loading

  1. Athena-ins/athena-contracts Athena-ins/athena-contracts Public

    Athena Guarantee Protocol Solidity Smart Contracts

    TypeScript 1 1

  2. LedgityLabs/LedgityYield LedgityLabs/LedgityYield Public

    Stable yield for stablecoins. Earn up to 7% APY on your stablecoins backed by Real World Assets (RWA). Access low-risk & stable yield directly from your wallet.

    TypeScript 660 18

  3. nft-recovery-tool nft-recovery-tool Public

    Emergency tool to recover NFTs from a compromised wallet

    TypeScript 4 1

  4. LedgityLabs/ledgity-v2-contracts LedgityLabs/ledgity-v2-contracts Public

    Smart-contracts for Ledgity Yield v1 + v2 💙

    Solidity 2 2

  5. llamaswap-widget llamaswap-widget Public

    React LlamaSwap widget for embedded wallet swap flows without iframes for Privy compatibility

    TypeScript 1