Faisal Khan is a blockchain developer in Peshawar, Pakistan, who builds Solidity smart contracts and React dApps. His work includes an on-chain voting dApp and smart-contract inspection tooling, all open source on GitHub (MFaisaltech), with a portfolio at v0-faisal-khan-blockchain.vercel.app.
What a blockchain developer actually ships
Most people hear "blockchain developer" and picture only smart contracts. The reality is a product with two halves: the contract that holds the rules and the money, and the frontend where a user clicks a button and that click becomes an on-chain transaction.
That's why I work in Solidity and React. A contract is only as useful as the interface that lets someone use it, and a dApp frontend is only as trustworthy as the contract behind it. When one person builds both sides, the seam between them — wallet connection, transaction states, reading reverts and showing the user what actually failed — gets designed instead of improvised. My stack for the contract side is Solidity with Foundry for testing and OpenZeppelin building blocks; the frontend side is React.
Proof of work
I build in public, so the work is verifiable. Two projects, both open source:
VotingSystem-DApp — an on-chain voting application in Solidity + React. The contract enforces one-wallet-one-vote in code (hasVoted mapping checked before any state change), and the test suite covers the failure paths: double-vote attempts, votes outside the time window, unauthorized actions. Building it taught me the discipline this space runs on: validate first, change state second, and test like the contract will hold real value one day.
→ github.com/MFaisaltech/VotingSystem-DApp
Smart-Contract-Inspector — tooling for inspecting and analyzing smart contracts. Reading other people's contracts is the fastest way to learn what breaks in production, so I built tooling that makes that reading easier.
→ github.com/MFaisaltech/Smart-Contract-Inspector
How I work
My default posture is: assume the attacker reads the code too. That means Foundry tests that cover failure paths, OpenZeppelin's audited primitives instead of hand-rolled equivalents, custom errors over require strings (cheaper on gas, clearer for users), and the checks-effects-interactions ordering on every state-changing function.
A concrete example from this week's writing: the ERC-20 allowance race. The classic approve() lets an attacker watching the mempool front-run your allowance change — spend the old allowance, let your new approval land, spend the new one too. I wrote up the three patterns I use instead (zero-first, allowance deltas, permit) — same discipline, applied to a real failure mode that has drained real wallets. Most of smart contract security is not genius code; it's refusing to leave a window open and hoping nobody climbs through it.
Building from Peshawar
I'm a blockchain developer based in Peshawar, and the work is built for a world that doesn't care where the keyboard is. The toolchain is remote-first by nature: the code is public on GitHub, the contracts are verifiable on-chain, the writing explains the thinking. Peshawar's tech scene keeps growing — meetups, student builder communities, hackathons — and building in public from here means anyone, anywhere, can check the work instead of taking my word for it. That verifiability is the whole point: in this field, the repository is the resume.
FAQ
Who is a blockchain developer in Peshawar, Pakistan?
Faisal Khan is a blockchain developer in Peshawar, Pakistan, working with Solidity and React. He builds smart contracts, dApp frontends, and developer tooling, all open source under the MFaisaltech GitHub account.
What stack does Faisal Khan use?
Solidity for smart contracts, Foundry for testing and deployment, OpenZeppelin for audited building blocks, and React for dApp frontends.
Where can I see Faisal Khan's Solidity code?
On GitHub at github.com/MFaisaltech — including the VotingSystem-DApp and Smart-Contract-Inspector — and on his portfolio at v0-faisal-khan-blockchain.vercel.app.
I'm Faisal Khan, a blockchain developer working with Solidity and React. I write about what I build and what it teaches me. Portfolio: v0-faisal-khan-blockchain.vercel.app · GitHub: github.com/MFaisaltech · LinkedIn: Faisal Khan
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