Muhammad U.

Tokenizing real-world assets or launching a DeFi product? The contracts are the easy part. The hard part is getting compliance, upgradeability and payment flows right before real money is on-chain. I'm a blockchain consultant and senior engineer (Top Rated Plus, 100% Job Success). I help founders and product teams decide what to build on-chain, then build it to production. HOW I CAN HELP Architecture & advisory • Token and contract design: ERC-20, ERC-1155, ERC-3643 and when each one fits • Compliance layers: allowlists, jurisdiction-based investor checks, transfer restrictions • Upgrade strategy (UUPS proxies) so you never need another token migration • Paid architecture phase: a clear blueprint, risks and a fixed quote before the build Build • Smart contracts: tokenization, fractional ownership, orderbooks, staking, vesting, escrow • Payment gateways: pay-with-token checkout, stablecoin payments, webhooks • Web3 backends: event listeners, transaction pipelines, multi-chain integrations • Full product builds when needed: Next.js, NestJS, PostgreSQL, Stripe + crypto payments, AI features SELECTED WORK • Token migration + payment gateway: new upgradeable ERC-20 on Ethereum mainnet, holder migration, and a payment portal integrated into 5 AI products • RWA tokenization platform: fractionalizer, orderbook, settlement and jurisdiction-based compliance • Crypto exchange backend: 150+ trading pairs, 10K+ requests/min, 99.9% uptime • Web3 gaming platform: GMRT token (listed on CoinMarketCap), staking and tournaments, 500+ concurrent transactions via RabbitMQ • DeFi time-exchange protocol: escrow, dual-signature verification HOW I WORK 1) Diagnose: understand your business model, users and constraints first 2) Design: architecture, contract specs and a fixed scope 3) Build in milestones, with tests and documentation at each step 4) Hand over: deployment, docs and a walkthrough for your team Chains: Ethereum, Polygon, Arbitrum, Base, BSC Tools: Solidity, Foundry, Hardhat, OpenZeppelin, Ethers.js, Viem, Node.js, NestJS, TypeScript, PostgreSQL Planning a tokenization or DeFi build? Book a 30-minute consultation or message me with what you're building and your timeline.