Skip to content
View 0xumarkhatab's full-sized avatar
🛡️
Aspiring to be #1
🛡️
Aspiring to be #1
55 followers · 6 following

Achievements

Achievement: Pair ExtraordinaireAchievement: Pull Sharkx2Achievement: YOLOAchievement: Quickdraw

Achievements

Achievement: Pair ExtraordinaireAchievement: Pull Sharkx2Achievement: YOLOAchievement: Quickdraw

Highlights

Block or report 0xumarkhatab

Block user

Prevent this user from interacting with your repositories and sending you notifications. Learn more about blocking users.

You must be logged in to block users.

Maximum 250 characters. Please don't include any personal information such as legal names or email addresses. Markdown supported. This note will be visible to only you.
Report abuse

Contact GitHub support about this user’s behavior. Learn more about reporting abuse.

Report abuse
0xumarkhatab/README.md
banner

👋 Hey, I'm Umar Khatab

I build and break smart contracts (in a good way).
4+ years in Solidity + EVM, shipping real protocols, writing tests, and doing security research.

You like the stats?

  • 160+ smart contracts shipped across EVM chains
  • 20k+ lines of Solidity
  • Security: found 1 High + 1 Medium on ZeroLend via Immunefi
  • Testing mindset: I like measurable quality (coverage, invariants, edge cases)

🔥 What I’m focused on right now

For the last ~6 months, I’ve been the Founding EVM Engineer at ViFi Labs (FX onchain) I worked end-to-end — Python simulations → Solidity (Foundry) implementation, with a strong focus on:

  • gas-efficient + modular contract design
  • unit / integration / staging tests (coverage >97%)
  • well-commented deployment scripts
  • deployed across multiple EVM testnets Launch target: 2026

🧱 Stuff I build (and enjoy building)

  • Lending / borrowing markets
  • AMMs (constant product + deeper mechanics)
  • Cross-chain messaging / bridges
  • NFTs + onchain apps
  • Full-stack Web3 (Next.js / Node.js / TS)

Projects I’m most proud of

  • Virtual Fiat Environment Converting USD pegged assets to synthetic representation of local currency on-chain for instant settlement cross border txs. Soon to be public . Keep an eye on ViFi Labs - X

  • RiftLend (Multichain Lending/Borrowing)
    Unified interest rates across Multi-chain + stress-free lending UX

  • Non-Custodial Wallet - Metamask-like wallet that can generate accounts, hold funds, and trade assets.

  • Multisig Cross chain Swap Bridge - Decentralised protocol in solidity where you can burn Tokens on one EVM chain and mint on another chain by using multiple signatures. Currently, it contains 5 tokens across 3 different chains Totalling up to 500 Lines of solidity code.

  • MEV / DEX research & builds
    Link

🛡️ Security work (bug bounties + audits)

I started learning smart contract security on my own and kept showing up in contests.

  • ZeroLend (High): Governance broken for whitelisted users
    Link

  • ZeroLend (Medium): Unlimited minting of governance NFTs
    Link

Audit journey repo: Link

✍️ Writing / teaching (Ethereum-focused)

I like explaining hard things in a simple way (bytecode, accounts, gas, DEX design).

  • Birth of a Smart Contract (EVM bytecode edition)

  • Build a Uniswap v4 Hook (assembly-level explanation)
    Link

  • EVM Masterclass (YouTube)
    Link

Education

Bachelor in Computer Science : Fast Nuces Lahore - Pakistan's Nobel Institute for Learning Computer Science

🤝 Let’s connect

If you’re building DeFi infra, L2 apps, or anything “EVM but harder”, I’m usually interested.

Twitter: https://twitter.com/0xumarkhatab
LinkedIn: https://www.linkedin.com/in/0xumarkhatab/

Pinned Loading

  1. 0xumarkhatab 0xumarkhatab Public