Muhammad Asif

Full Stack Blockchain Developer

Fiverr • Freelance

Mar 2021 - Present • 5 yrs 4 mos

Delivering end-to-end blockchain development and smart contract security auditing services to startups, DeFi protocols, and Web3 teams globally through Fiverr. Core services delivered: - Smart Contract Development — ERC-20, ERC-721, ERC-1155, SPL tokens, staking, vesting, airdrop, AMM/DEX, multi-sig, and custom DeFi protocol logic on Ethereum, Solana, Polygon, BSC, Base, Arbitrum, and Optimism using Solidity and Rust/Anchor. - Smart Contract Security Auditing — Manual line-by-line review combined with Slither static analysis, MythX symbolic execution, and Foundry fuzz testing. Severity-ranked PDF reports covering all 37 SWC vulnerability classes including reentrancy, access control, integer overflow, and flash loan attack vectors. - DeFi Protocol & dApp Development — Full-stack Web3 applications with React frontends integrated via Wagmi, Viem, and Ethers.js, connected to custom smart contract backends. - AI-Powered Systems — Crypto trading bots using CCXT across multiple exchanges, LLM-integrated applications, RAG pipelines, and AI agent workflows built with LangChain and LangGraph. - Token Launch Consulting — Tokenomics design, contract architecture, testnet-to-mainnet deployment, and exchange listing audit report preparation. Tech stack: Solidity · Rust · Foundry · Hardhat · OpenZeppelin · Slither · MythX · React · Next.js · Wagmi · Ethers.js · LangChain · CCXT · Neon · Prisma · Node.js