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jw3b-dev/README.md

Hi πŸ‘‹, I'm John Wellard

Smart Contract Security Auditor β€’ DeFi Protocol Engineer β€’ zk‑L2 Solidity Specialist


  • πŸš€ Founder of AgileGypsy β€” building secure, scalable blockchain & AI systems for a decentralized future

  • πŸ’» Blockchain Engineer & Security Auditor
    Specializing in DeFi protocols, smart contracts, tokenomics, and audit-level protocol security

  • 🧠 Exploring AI Γ— Blockchain:

    • Token‑gated AI SaaS platforms
    • Autonomous ChainBots & LLM agents
    • Smart contract auditing with AI fuzzing and invariant testing
  • πŸ” Audit contributor on CodeHawks & Immunifi
    (building a portfolio of real-world vulnerability findings)

  • 🌐 Under construction:


πŸ› οΈ Core Tech Stack

Smart Contract Security & Advanced Solidity

Solidity
Foundry
Hardhat
Ethers.js
Yul / Assembly

DeFi Protocols & L2s

Uniswap
Curve
zk-SNARKs
Account Abstraction

AI Γ— Smart Contracts

AI Agents
Protocol Security
Formal Verification


πŸ“š Certifications & Coursework

  • πŸš€ In Progress (Aug–Dec 2025)

    • πŸ† SSCD+ (Updraft Solidity Smart Contract Developer Certification) (Expected: Sep/Oct 2025)
    • πŸ” Smart Contract Security (Cyfrin) (Top Priority)
    • πŸ”§ Advanced Foundry (Cyfrin) (36%)
    • βš™οΈ Assembly & Formal Verification (Cyfrin) (Up next)
    • βš–οΈ Uniswap V2/V3 β†’ Curve Cryptoswap/Stableswap (Q4)
    • πŸ”“ Advanced Web3 Wallet Security (Cyfrin) (58%)
  • βœ… Completed

    • Solidity Smart Contract Dev (Cyfrin)
    • Web3 Wallet Security Basics (Cyfrin)
    • Foundry Fundamentals (Cyfrin)
    • Blockchain Basics (Cyfrin)
    • 🧠 Neo4j Certified Professional

πŸ¦… CodeHawks Auditor Profile

CodeHawks Rank Badge

πŸ“Š Audit Stats (as of July 28, 2025)

🧠 Metric πŸ”Ž Value
Rank #1176
EXP 124
Findings πŸŸ₯ 1 High β€’ 🟧 1 Medium β€’ 🟩 1 Low
Profile View on CodeHawks

πŸ’Ό Featured Repositories

Project Description
cyfrin-updraft-track Structured coursework tracker & rewrite repo (SSCD+, SCS, Foundry)
solidity-audits Audit reports, vulnerability writeups (CodeHawks / C4 style)
chainbots-prototype Token-gated AI bot prototype with smart contract auth + usage metering
zklib-starter Experimental ZK tooling repo (Noir + Solidity proof composition) (coming soon)

πŸ“’ Connect With Me

Platform Link
LinkedIn linkedin.com/in/john-wellard
Portfolio jw3b.dev
Email onchain@jw3b.dev
Twitter/X @Web3ByVirtuAI
CodeHawks Profile
Payments Airtm β€’ UD.me Wallet

πŸ€– Web3 is evolving β€” and so am I.

From memecoins to MEV, from Yul to zk β€” I’m documenting it all.
πŸ” Auditing contracts, breaking things (ethically), and pushing gas to the limit.
🚧 Work in progress? Always.
🧡 Follow the commits, fork the audits, and stay weird πŸ‘½.

πŸ“’ Feel free to reach out!

Pinned Loading

  1. Blockchain-Visualizer Blockchain-Visualizer Public

    Created with StackBlitz ⚑️

    TypeScript 2

  2. cyfrin-updraft-track cyfrin-updraft-track Public

    This repository tracks my structured progress through the full suite of Cyfrin Updraft blockchain development courses in preparation for SSCD+ & Chainlink certification.

  3. solidity-audits solidity-audits Public

    High-quality Solidity smart contract security audits and competitive findings by John Wellard | AgileGypsy

  4. dualweb-dashboard dualweb-dashboard Public

    Seamless Navigation Between Web2 and Web3 Worlds β€” A modern, responsive Next.js dashboard built with Tailwind CSS and TypeScript, enabling hybrid identity and decentralized interactions across netw…

    TypeScript 1 1

  5. Arbitrage-Flashbot Arbitrage-Flashbot Public

    TypeScript 1