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Md S.
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Md S.

Blockchain Developer | Ethereum & Solana Expert | Solidity Rust NextJS

Want to work with an experienced Blockchain developer who can bring your smart contract, decentralized application (dApp) vision to life? Are you looking for a Solidity or Rust developer to develop "Gas-Optimized" smart contracts? Whether you're looking to create ERC20 or SPL tokens, ERC721, ERC1155, or NFTs with custom features, concerned about vulnerabilities and exploits in your high-value contracts, need to write tests for contracts, or need a script to interact with leading DEX protocols—I've got you covered. 🖐 Some of my previous clients' quotes about me: ✔️ "...Excellent technical skills and consistently good communication... Completed the project in a timely fashion, exceeding our original deadline." ✔️ "His work was phenomenal...made sure I understood every step along the way... ✔️ "..took this project on as if it was his own... Great professional skills, always there to answer questions and suggest the best solutions." ✔️ "...Every facet of his work was impressive. WOW!" ✔️ "... goes above and beyond. Md's professionalism and expertise in blockchain are unmatched.." ✔️ "... communication is excellent, delivery is fast, and his knowledge of smart contracts is impressive." With expertise in EVM-compatible chains (like Ethereum, BSC) and Solana, I specialize in delivering high-performance, gas-optimized smart contracts and dApps tailored to your specific requirements. I help my clients build secure and highly resilient smart contracts, minimizing vulnerabilities and ensuring your code is fortified against exploits. I might be the perfect fit if you're thinking of any of these: ✅ "I need the BEST developer who's as passionate about my success as his own." ✅ "I want someone who will walk me through every step of smart contract interaction." ✅ "Gas fees are too high! My smart contract needs to be lightning-fast and cost-efficient." ✅ "I know blockchain, but I need a professional to make my smart contracts 100% secure." ✅ "I’m not an Ethereum or Solana expert, and I don’t have time to mess around with dApps." ✅ "Our last dApp was a disaster—I can’t afford to let that happen again." ✅ "I need an EVM-compatible blockchain or Solana expert to cover all my bases for cross-chain or multi-chain applications." Working with me, you will: 💎 Gain access to a developer skilled in Python, JavaScript, TypeScript, Rust, Solidity, Brownie, Hardhat, NextJS, Foundry, and Anchor. 💎Eliminate vulnerabilities and reduce gas fees during both deployment and interactions. 💎 Maximize your DApp's security with continuous follow-ups for improvements. 💎 Save time and resources—you won’t need to hire separate back-end, front-end, Rust, or Solidity developers because I handle it all as a full-stack developer. 💎 Receive custom scripts to swap, add, or remove liquidity, lend, deposit, borrow, withdraw, and interact across top dApp protocols. 💎 Optimize for multi-chain functionality—Whether you need to bridge Ethereum, BSC, or Solana, I can create solutions that integrate seamlessly across multiple networks. 🖐 My Skills & Expertise in Blockchain: ☑️Solidity Development for EVM-compatible smart contracts ☑️Rust Development for Solana Blockchain ☑️Experience with Chainlink, various ERC standards, and OpenZeppelin ☑️Token development(ERC20/BEP20/SPL) with features like Mintable, Burnable, Reflections, TxFee, Whitelist/Blacklist, and IDO/ICO for tokens. ☑️NFTs (ERC721, ERC1155, ERC404, etc) with Whitelist, Royalties, Presale, Public Sale, Dutch Auctions, IPFS Hosting, and Dynamic NFTs ☑️Full-stack Blockchain Developer with expertise in Solidity, Python (Brownie), JavaScript (Hardhat), Typescript, Rust(Anchor), NextJS, and Foundry. ☑️Script/Program Development for deploying/interacting with smart contracts and protocols like Aave, Uniswap, Raydium, and PancakeSwap. Why Work With Me: 💎Extensive Experience: I've designed and built hundreds of smart contracts from scratch, creating robust back-end scripts for deployment. 💎Expert Problem Solver: Proficient in designing projects from the ground up, solving complex problems, and rapid iterative prototyping. 💎Gas Optimization Strategies: I use professional strategies to optimize smart contracts for minimal gas fees and thoroughly test them to identify and prevent potential exploits. My Background in Numbers: ✔️ Over 3 years of experience with Blockchain technology. ✔️ Developed numerous DApps and scripts for protocols and tokens, including ERC20, BEP20, SPL, ERC721, and ERC1155. ✔️ Worked on several growing DApp projects, such as Crowdfunding platforms, Airdrop systems, DEXs, insurance, ICO, IDO, Tokens, Lottery, and NFT marketplaces. ✔️ Created a variety of smart contracts. ✔️ Wrote extensive test scripts for smart contracts using Foundry, Hardhat, and Anchor. Sound Like a Fit? Next Steps: Click the green "Invite to Job" button in the top right-hand corner or send me a message, and let’s schedule a call to discuss your project! Otherwise, feel free to book a consultation!

🇧🇩Narayanganj, Bangladesh$20/hr100% JSS4.75 (92)Since Oct 2022

Earnings and projects

MRR
$259

Last 6 months ÷ 6

World#103,944 / 412k
🇧🇩Country#2,949 / 15.0k
Revenue, last 30 days
$0

Last 6 months: $1.6k

Total earnings
$77k

Billed in all: $79k

World#51,592 / 412k
🇧🇩Country#1,323 / 15.0k
Per project
$700

$776 in the last 6 months

World#152,767 / 412k
🇧🇩Country#3,122 / 15.0k
Projects, last 6 months
2
100% fixed0% hourly
World#88,921 / 412k
🇧🇩Country#4,446 / 15.0k
Projects in all
110

Across 117 contracts

80% fixed20% hourly
World#24,466 / 412k
🇧🇩Country#2,137 / 15.0k

Earnings, last 30 days

$78.6kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$77k$78k$79k$80kOct 8Oct 23Nov 7

Skill rankings: Top 11% in DApp Development

Ranked by MRR among everyone on Upwork with the skill.

  1. #13Blockchain Tokenization68 freelancers · 🇧🇩 #1Top 19%
  2. #15DApp Development131 freelancers · 🇧🇩 #1Top 11%
  3. #34Smart Contract Development225 freelancers · 🇧🇩 #1Top 15%
  4. #44Solana270 freelancers · 🇧🇩 #1Top 16%
  5. #51web3.js342 freelancers · 🇧🇩 #2Top 15%
  6. #68Ethereum531 freelancers · 🇧🇩 #2Top 13%
  7. #80Smart Contract554 freelancers · 🇧🇩 #3Top 14%
  8. #96Blockchain Development593 freelancers · 🇧🇩 #3Top 16%