Hire the Best Solidity Freelancers
in India

More than 3,000 reviews on G2
Rating is 4.5 out of 5.
4.5/5
of Upwork by G2 peer reviewers
Maulik D.

Surat, India

$40/hr
5.0
7 jobs

I am expert on iphone apps, android apps, Web applications, and design with 10+ years of professional experience in complex database programming. Here I am working as a single freelancer. โ€ข Have a good skills and expertise with Salesforce, Ethereum, Solidity, NFT mint, NFT Marketplace, Auctions, Defi, MVC, WEB APIS.. โ€ข Expert in modern ReactJs, NodeJs, Python, AWS, PHP, Laravel, Codeigniter, WordPress, HTML5, CSS3, Bootstrap, javascript, flutter. It is important for me to build a relationship with the client, so I am primarily looking for projects. I am ready to discuss requirements and communicate with your team via video chat.

  • Solidity
  • Blockchain
  • JavaScript
  • PHP
  • Node.js
  • Python
  • Flutter
  • iOS
  • Android
  • In-App Purchases
  • Laravel
  • React
  • CodeIgniter
  • API
Vipin V.

Udupi, India

$20/hr
4.9
22 jobs

Your blockchain project will generate $500K+ revenue through secure, scalable Web3 solutions that outperform 90% of competitors. I transform complex blockchain ideas into profitable, battle-tested applications with verified smart contracts and measurable business impact. ๐—ฅ๐—ฒ๐—ฐ๐—ฒ๐—ป๐˜ ๐—–๐—น๐—ถ๐—ฒ๐—ป๐˜ ๐—ฅ๐—ฒ๐˜€๐˜‚๐—น๐˜๐˜€: -Deployed DeFi protocol managing $2.3M TVL with zero security breaches over 18 months -Built an NFT marketplace processing $800K+ in transactions within the first 6 months -Optimized smart contracts, reducing gas fees by 42% for 50K+ users -Created a cross-chain bridge handling 15K+ transactions monthly with 99.97% uptime ๐—–๐—ผ๐—ฟ๐—ฒ ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐˜๐—ถ๐˜€๐—ฒ: ๐—ฆ๐—บ๐—ฎ๐—ฟ๐˜ ๐—–๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜๐˜€ & ๐—ฆ๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ถ๐˜๐˜†: Ethereum, Polygon, BNB Chain, Solana using Solidity and Rust. Expert in gas optimization, security auditing, and vulnerability prevention with 200+ deployed contracts. ๐——๐—ฒ๐—™๐—ถ ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜: Staking protocols, lending platforms, liquidity pools, and automated market makers (AMMs). Specialized in tokenomics design and yield farming mechanisms. ๐—ก๐—™๐—ง & ๐—ง๐—ผ๐—ธ๐—ฒ๐—ป ๐—ฆ๐—ผ๐—น๐˜‚๐˜๐—ถ๐—ผ๐—ป๐˜€: ERC-20, ERC-721, ERC-1155 implementations, NFT marketplaces, and custom tokenomics. Experience with 40+ successful token launches. ๐—ฑ๐—”๐—ฝ๐—ฝ ๐—”๐—ฟ๐—ฐ๐—ต๐—ถ๐˜๐—ฒ๐—ฐ๐˜๐˜‚๐—ฟ๐—ฒ: React/Next.js frontends with Web3.js/Ethers.js integration, MetaMask and WalletConnect implementations, and responsive Web3 user experiences. We deliver full-cycle, end-to-end blockchain development solutions, spanning DeFi protocols, NFT marketplaces, RWA tokenization, Layer-2 integrations, and advanced Web3 dApp development. Our expertise includes custom smart contract development, enterprise-grade blockchain infrastructure, and seamless integration with modern Web3 ecosystems. We architect secure, scalable, and high-performance decentralized systems designed for real-world adoption and long-term impact. Our approach emphasizes smart contract audits, zero-trust security architecture, gas optimization, MEV-resistant design, cross-chain interoperability, and on-chain governance models. By implementing rigorous security standards, protocol-level safeguards, and performance optimization strategies, we build blockchain products that meet evolving industry standards and ensure sustainable scalability. If you are ready to turn your Web3 vision into a production-ready solution, we can support your tokenomics design, DAO framework development, blockchain infrastructure planning, and scalable Web3 roadmap execution, delivering resilient, future-proof decentralized ecosystems aligned with next-generation blockchain innovation.

  • Solidity
  • Blockchain Development
  • Ethereum
  • Smart Contract
  • Web3
  • DeFi
  • NFT
  • Radar Polygon
  • Solana
  • Hardhat
  • Truffle
  • web3.js
  • Ethers.js
  • Layer 2 Blockchain
  • Information Security Audit
Sunny K.

Jawalamukhi, India

$16/hr
5.0
215 jobs

๐Ÿ‘‘๐๐ฅ๐จ๐œ๐ค๐œ๐ก๐š๐ข๐ง ๐‚๐จ๐ง๐ฌ๐ฎ๐ฅ๐ญ๐š๐ง๐ญโ‚ฟโƒจ ๐Ÿฅ‡10+ years of ๐‘บ๐‘ถ๐‘ณ๐‘ฐ๐‘ซ experience ๐Ÿ•’ 24*7 โœจ With over 10+ years of high-demand experience in ๐—ฏ๐—น๐—ผ๐—ฐ๐—ธ๐—ฐ๐—ต๐—ฎ๐—ถ๐—ป ๐—ฑ๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜, I specialize in delivering robust ๐—ณ๐—ฟ๐—ผ๐—ป๐˜-๐—ฒ๐—ป๐—ฑ and ๐—ฏ๐—ฎ๐—ฐ๐—ธ-๐—ฒ๐—ป๐—ฑ solutions for ๐—ฏ๐—น๐—ผ๐—ฐ๐—ธ๐—ฐ๐—ต๐—ฎ๐—ถ๐—ป-๐—ฝ๐—ผ๐˜„๐—ฒ๐—ฟ๐—ฒ๐—ฑ ๐—ฎ๐—ฝ๐—ฝ๐—น๐—ถ๐—ฐ๐—ฎ๐˜๐—ถ๐—ผ๐—ป๐˜€. My expertise covers comprehensive smart contract development, including ๐—ฆ๐—ผ๐—น๐—ถ๐—ฑ๐—ถ๐˜๐˜† and ๐—ฅ๐˜‚๐˜€๐˜ for platforms like ๐—˜๐˜๐—ต๐—ฒ๐—ฟ๐—ฒ๐˜‚๐—บ and ๐—ฆ๐—ผ๐—น๐—ฎ๐—ป๐—ฎ. I excel in architecting, implementing, and auditing ๐—ฑ๐—ฒ๐—ฐ๐—ฒ๐—ป๐˜๐—ฟ๐—ฎ๐—น๐—ถ๐˜‡๐—ฒ๐—ฑ solutions tailored for industries like ๐—™๐—ถ๐—ป๐˜๐—ฒ๐—ฐ๐—ต, where ๐˜๐—ผ๐—ธ๐—ฒ๐—ป๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป, ๐˜€๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ถ๐˜๐˜†, ๐—ฎ๐—ป๐—ฑ ๐˜€๐—ฐ๐—ฎ๐—น๐—ฎ๐—ฏ๐—ถ๐—น๐—ถ๐˜๐˜† are essential. By leveraging blockchainโ€™s power, I create innovative applications that support ๐—ฑ๐—ฒ๐—ฐ๐—ฒ๐—ป๐˜๐—ฟ๐—ฎ๐—น๐—ถ๐˜‡๐—ฒ๐—ฑ ๐—ณ๐—ถ๐—ป๐—ฎ๐—ป๐—ฐ๐—ฒ (๐——๐—ฒ๐—™๐—ถ), ๐—ป๐—ผ๐—ป-๐—ณ๐˜‚๐—ป๐—ด๐—ถ๐—ฏ๐—น๐—ฒ ๐˜๐—ผ๐—ธ๐—ฒ๐—ป๐˜€ (๐—ก๐—™๐—ง๐˜€), ๐’๐ฆ๐š๐ซ๐ญ ๐‚๐จ๐ง๐ญ๐ซ๐š๐œ๐ญ ๐€๐ฎ๐๐ข๐ญ๐จ๐ซ and ๐—ฎ๐—ฑ๐˜ƒ๐—ฎ๐—ป๐—ฐ๐—ฒ๐—ฑ ๐˜€๐—บ๐—ฎ๐—ฟ๐˜ ๐—ฐ๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜ functionality, ensuring secure and efficient solutions. My approach includes precise requirement ๐—ฎ๐—ป๐—ฎ๐—น๐˜†๐˜€๐—ถ๐˜€, ๐˜€๐˜๐—ฟ๐—ฎ๐˜๐—ฒ๐—ด๐—ถ๐—ฐ ๐—ฝ๐—น๐—ฎ๐—ป๐—ป๐—ถ๐—ป๐—ด, ๐—ฒ๐—ณ๐—ณ๐—ถ๐—ฐ๐—ถ๐—ฒ๐—ป๐˜ ๐—ฐ๐—ผ๐—ฑ๐—ถ๐—ป๐—ด, ๐˜๐—ต๐—ผ๐—ฟ๐—ผ๐˜‚๐—ด๐—ต ๐—ฑ๐—ฒ๐—ฏ๐˜‚๐—ด๐—ด๐—ถ๐—ป๐—ด, ๐—ฎ๐—ป๐—ฑ ๐˜€๐—ฒ๐—ฎ๐—บ๐—น๐—ฒ๐˜€๐˜€ ๐—ฑ๐—ฒ๐—ฝ๐—น๐—ผ๐˜†๐—บ๐—ฒ๐—ป๐˜. With minimal supervision, I ensure each stage aligns with project goals, producing solutions that are both innovative and reliable. ๐—ง๐—ฒ๐—ฐ๐—ต๐—ป๐—ผ๐—น๐—ผ๐—ด๐—ถ๐—ฒ๐˜€ : - ============================================================================= ๐Ÿ”ฅ๐—•๐—น๐—ผ๐—ฐ๐—ธ๐—ฐ๐—ต๐—ฎ๐—ถ๐—ป: ๐—•๐—ถ๐˜-๐—ฐ๐—ผ๐—ถ๐—ป, ๐—˜๐˜๐—ต๐—ฒ๐—ฟ๐—ฒ๐˜‚๐—บ, ๐—ฆ๐—ผ๐—น๐—ฎ๐—ป๐—ฎ ,๐—˜๐—ข๐—ฆ, ๐—›๐˜†๐—ฝ๐—ฒ๐—ฟ๐—น๐—ฒ๐—ฑ๐—ด๐—ฒ๐—ฟ, ๐—ฆ๐˜‚๐—ฏ๐˜€๐˜๐—ฟ๐—ฎ๐˜๐—ฒ, ๐—ก๐—™๐—ง, ๐—ฆ๐—ผ๐—น๐—ถ๐—ฑ๐—ถ๐˜๐˜†: ๐—ฒ๐—ฟ๐—ฐ๐Ÿฎ๐Ÿฌ/๐——๐—ฒ๐—™๐—ถ, ๐—ฒ๐—ฟ๐—ฐ๐Ÿณ๐Ÿฎ๐Ÿญ/๐—ก๐—™๐—ง. ๐Ÿ”ฅ๐—™๐—ฟ๐—ผ๐—ป๐˜-๐—ฒ๐—ป๐—ฑ: ๐—ฅ๐—ฒ๐—ฎ๐—ฐ๐˜.๐—ท๐˜€, ๐—ก๐—ฒ๐˜…๐˜, ๐—๐—ฎ๐˜ƒ๐—ฎ๐—ฆ๐—ฐ๐—ฟ๐—ถ๐—ฝ๐˜ (๐—˜๐—ฆ๐Ÿฒ), ๐—ง๐˜†๐—ฝ๐—ฒ๐—ฆ๐—ฐ๐—ฟ๐—ถ๐—ฝ๐˜, ๐—”๐—ป๐—ด๐˜‚๐—น๐—ฎ๐—ฟ, ๐—ฉ๐˜‚๐—ฒ.๐—ท๐˜€ ๐Ÿ”ฅ๐—•๐—ฎ๐—ฐ๐—ธ-๐—ฒ๐—ป๐—ฑ: ๐—ก๐—ผ๐—ฑ๐—ฒ.๐—ท๐˜€, ๐—ฃ๐—›๐—ฃ ๐—Ÿ๐—ฎ๐—ฟ๐—ฎ๐˜ƒ๐—ฒ๐—น, ๐—™๐—ถ๐—ฟ๐—ฒ๐—ฏ๐—ฎ๐˜€๐—ฒ. ๐Ÿ”ฅ๐——๐—•: ๐— ๐˜†๐—ฆ๐—ค๐—Ÿ, ๐— ๐—ผ๐—ป๐—ด๐—ผ ๐——๐—• ๐—ฃ๐˜‚๐—ฏ๐—น๐—ถ๐—ฐ ๐—•๐—น๐—ผ๐—ฐ๐—ธ๐—ฐ๐—ต๐—ฎ๐—ถ๐—ป ๐—ฃ๐—น๐—ฎ๐˜๐—ณ๐—ผ๐—ฟ๐—บ๐˜€: - ============================================================================= โœ” ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ถ๐—ป๐—ด ๐˜€๐—บ๐—ฎ๐—ฟ๐˜ ๐—ฐ๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜๐˜€ ๐˜‚๐˜€๐—ถ๐—ป๐—ด ๐—ฎ ๐—ฆ๐—ผ๐—น๐—ถ๐—ฑ๐—ถ๐˜๐˜† ๐—ฝ๐—ฟ๐—ผ๐—ด๐—ฟ๐—ฎ๐—บ๐—บ๐—ถ๐—ป๐—ด ๐—น๐—ฎ๐—ป๐—ด๐˜‚๐—ฎ๐—ด๐—ฒ. โœ” ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ถ๐—ป๐—ด ๐—ฅ๐—ฃ๐—– ๐˜‚๐˜€๐—ถ๐—ป๐—ด ๐—ฐ๐—น๐—ถ๐—ฒ๐—ป๐˜ ๐—น๐—ถ๐—ฏ๐—ฟ๐—ฎ๐—ฟ๐—ถ๐—ฒ๐˜€ ๐˜€๐˜‚๐—ฐ๐—ต ๐—ฎ๐˜€ ๐—ช๐—ฒ๐—ฏ๐Ÿฏ โœ” ๐—ฆ๐˜๐—ฎ๐˜๐—ถ๐—ฐ ๐—ฎ๐—ป๐—ฎ๐—น๐˜†๐˜€๐—ถ๐˜€ ๐—ผ๐—ณ ๐˜€๐—บ๐—ฎ๐—ฟ๐˜ ๐—ฐ๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜๐˜€ ๐—ณ๐—ผ๐—ฟ ๐—ด๐—ฎ๐˜€ ๐—ฐ๐—ผ๐—ป๐˜€๐˜‚๐—บ๐—ฝ๐˜๐—ถ๐—ผ๐—ป ๐—ฎ๐—ป๐—ฑ ๐—ผ๐—ฝ๐˜๐—ถ๐—บ๐—ถ๐˜‡๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐˜‚๐˜€๐—ถ๐—ป๐—ด ๐—ฅ๐—ฒ๐—บ๐—ถ๐˜… ๐—œ๐——๐—˜. โœ” ๐—ฆ๐—ฒ๐—ฐ๐˜‚๐—ฟ๐—ถ๐—ป๐—ด ๐˜€๐—บ๐—ฎ๐—ฟ๐˜ ๐—ฐ๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜๐˜€ ๐˜‚๐˜€๐—ถ๐—ป๐—ด ๐—น๐—ถ๐—ฏ๐—ฟ๐—ฎ๐—ฟ๐—ถ๐—ฒ๐˜€ ๐—น๐—ถ๐—ธ๐—ฒ ๐—ข๐—ฝ๐—ฒ๐—ป๐—ญ๐—ฒ๐—ฝ๐—ฝ๐—ฒ๐—น๐—ถ๐—ป. โœ” ๐——๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—ถ๐—ป๐—ด ๐—˜๐˜๐—ต๐—ฒ๐—ฟ๐—ฒ๐˜‚๐—บ ๐—ฑ๐—ฎ๐—ฝ๐—ฝ๐˜€ ๐˜‚๐˜€๐—ถ๐—ป๐—ด ๐˜๐—ต๐—ฒ ๐—ง๐—ฟ๐˜‚๐—ณ๐—ณ๐—น๐—ฒ ๐—ณ๐—ฟ๐—ฎ๐—บ๐—ฒ๐˜„๐—ผ๐—ฟ๐—ธ. โœ” ๐—œ๐—ป๐˜๐—ฒ๐—ด๐—ฟ๐—ฎ๐˜๐—ถ๐—ผ๐—ป ๐˜„๐—ถ๐˜๐—ต ๐—ฐ๐—ฟ๐˜†๐—ฝ๐˜๐—ผ ๐˜„๐—ฎ๐—น๐—น๐—ฒ๐˜๐˜€ ๐˜€๐˜‚๐—ฐ๐—ต ๐—ฎ๐˜€ ๐— ๐—ฒ๐˜๐—ฎ๐—บ๐—ฎ๐˜€๐—ธ. โœ” ๐—ฆ๐—ธ๐—ถ๐—น๐—น๐—ฒ๐—ฑ ๐—ถ๐—ป ๐—น๐—ฒ๐˜ƒ๐—ฒ๐—ฟ๐—ฎ๐—ด๐—ถ๐—ป๐—ด ๐—ฆ๐—ฃ๐—Ÿ ๐—น๐—ถ๐—ฏ๐—ฟ๐—ฎ๐—ฟ๐—ถ๐—ฒ๐˜€ ๐—ณ๐—ผ๐—ฟ ๐—ฟ๐—ฎ๐—ฝ๐—ถ๐—ฑ ๐—ฑ๐—ฒ๐˜ƒ๐—ฒ๐—น๐—ผ๐—ฝ๐—บ๐—ฒ๐—ป๐˜ โœ” ๐——๐—ฒ๐—ฝ๐—น๐—ผ๐˜†๐—ถ๐—ป๐—ด ๐˜€๐—บ๐—ฎ๐—ฟ๐˜ ๐—ฐ๐—ผ๐—ป๐˜๐—ฟ๐—ฎ๐—ฐ๐˜๐˜€ ๐—ผ๐—ป ๐˜๐—ฒ๐˜€๐˜ ๐—ป๐—ฒ๐˜๐˜„๐—ผ๐—ฟ๐—ธ๐˜€ ๐˜€๐˜‚๐—ฐ๐—ต ๐—ฎ๐˜€ ๐—ฟ๐—ผ๐—ฝ๐˜€๐˜๐—ฒ๐—ป/๐—ฟ๐—ถ๐—ป๐—ธ๐—ฒ๐—ฏ๐˜† ๐—ฎ๐˜€ ๐˜„๐—ฒ๐—น๐—น ๐—ฎ๐˜€ ๐—˜๐˜๐—ต๐—ฒ๐—ฟ๐—ฒ๐˜‚๐—บ ๐—บ๐—ฎ๐—ถ๐—ป๐—ป๐—ฒ๐˜. I'm always ready to provide efficient, impactful assistance and to take on new challenges swiftly. If you need any of the services mentioned, feel free to reach outโ€”I'm prepared to dive in and deliver exceptional results! I pride myself on identifying the most cost-effective, high-quality solutions for every opportunity I encounter. Thank you for considering my profile! #BlockchainConsultant #SmartContracts #DecentralizedApps #Solana #Ethereum #Bitcoin #DeFi #NFT #Web3 #CryptoDevelopment #BlockchainExpert #FullStackBlockchain #SolidityDev #FintechSolutions #Tokenization #SmartContractAuditing #FrontEndBlockchain #BackendArchitecture #ReactJS #NodeJS #Laravel #MongoDB #MySQL #MetamaskIntegration #OpenZeppelin #TruffleFramework #CryptoWalletIntegration #BlockchainInnovation #TechnologyConsultant #TechLeadership #CostEffectiveSolutions #ReadyToCode

  • Solidity
  • DApp Development
  • Blockchain Development
  • Smart Contract
  • web3.js
  • Hyperledger Fabric
  • Crypto Exchange Platform
  • Cryptocurrency
  • Crypto Wallet Development
  • Software Development
  • Smart Contract Development
  • AI Development
  • Machine Learning
  • Blockchain, NFT & Cryptocurrency
  • Layer 2 Blockchain
Deepash B.

Amritsar, India

$45/hr
5.0
5 jobs

I help startups, founders, and businesses to build production-ready Blockchain, Web3, and AI-powered solutions that are secure, scalable, and built for real-world use. As a Blockchain Developer and AI Agent Developer, I specialize in Smart Contract Development, Solana Development, Ethereum Development, Web3 Infrastructure, Autonomous AI Agents, and On-Chain Payment Systems. My focus is on building high-performance decentralized applications, blockchain ecosystems, and AI-driven automation that deliver measurable results. ๐—–๐—ผ๐—ฟ๐—ฒ ๐—˜๐˜…๐—ฝ๐—ฒ๐—ฟ๐˜๐—ถ๐˜€๐—ฒ: Blockchain Development, Web3 Development, Smart Contract Development, Solidity Development, Rust Development, Solana Development, Ethereum Development, DApp Development, AI Agent Development, Agentic AI Systems, Autonomous AI Agents, Web3 Infrastructure, Layer-1 Blockchain Development, DeFi Development, NFT Marketplace Development, Cryptocurrency Payment Systems, On-Chain Payment Infrastructure, x402 Payment Protocol, Staking Platforms, Validator Nodes, Consensus Mechanisms, Hyperledger Development, IPFS Integration, Web3 Automation, Decentralized Identity Solutions, Certificate Verification Systems ๐—ง๐—ฒ๐—ฐ๐—ต๐—ป๐—ถ๐—ฐ๐—ฎ๐—น ๐—ฆ๐˜๐—ฎ๐—ฐ๐—ธ: Solidity, Rust, Python, JavaScript, TypeScript, React.js, Next.js, Node.js, Web3.js, Ethers.js, Hyperledger, IPFS, MongoDB, PostgreSQL, AI/ML Frameworks, LLM Integration, Agentic AI Frameworks, API Development, Cloud Infrastructure, Blockchain Architecture, and Web3 Technologies. ๐—ฃ๐—ฟ๐—ผ๐—ท๐—ฒ๐—ฐ๐˜๐˜€ ๐—œ'๐˜ƒ๐—ฒ ๐—•๐˜‚๐—ถ๐—น๐˜: โœ… Smart Contracts for Ethereum and EVM Chains โœ… Solana-Based Blockchain Applications โœ… NFT Marketplaces with Minting, Trading, and Marketplace Features โœ… DeFi Protocols and Staking Platforms โœ… Layer-1 Blockchain Ecosystems with Validator Networks โœ… Decentralized Verification and Credential Systems โœ… AI-Powered Autonomous Agents โœ… On-Chain Payment Infrastructure and Web3 Payment Systems โœ… Enterprise Blockchain Solutions using Hyperledger โœ… Web3 Automation and Blockchain Integrations Whether you're building a Blockchain Startup, Web3 Platform, DeFi Protocol, NFT Marketplace, AI Agent, Smart Contract System, or Cryptocurrency Payment Solution, I can transform your idea into a secure, scalable, and production-ready product. Let's build the future of Blockchain, Web3, Smart Contracts, AI Agents, DeFi, NFTs, and Decentralized Infrastructure.

  • Solidity
  • DApp Development
  • Ethereum
  • Smart Contract
  • Smart Contract Development
  • Rust
  • Solana
  • Web3
  • web3.js
  • DeFi
  • Blockchain Tokenization
  • Crypto Exchange Platform
  • Crypto Wallet Development
  • ERC-720
  • ERC-20
  • ERC-721
  • Node.js
  • React
  • Decentralized Exchange
  • Crypto Wallet
Abhijeet Kr P.

Saran, India

$20/hr
5.0
9 jobs

Iโ€™m a Senior Full-Stack Blockchain Developer with 8+ years of experience delivering production-ready Web3 solutions across Layer 1 and Layer 2 networks. I help startups, enterprises, and founders turn complex blockchain ideas into secure, high-performance applications that scale with real users. Iโ€™ve worked extensively across Ethereum and various chains (Ethereum, BNB Chain, Polygon, Avalanche, Tron) as well as Solana, building everything from smart contract systems to complete Web3 platforms. ๐–๐ก๐š๐ญ ๐ˆ ๐๐ฎ๐ข๐ฅ๐: -DeFi platforms (staking, yield farming, liquidity mechanisms) -NFT marketplaces (minting, trading, royalties, gas optimization) -Token launchpads & ICO/IDO platforms -Tokenization systems for digital and real-world assets -DAO & governance frameworks -Multi-chain and Layer 2 integrations ๐๐ฅ๐จ๐œ๐ค๐œ๐ก๐š๐ข๐ง ๐„๐ฑ๐œ๐ž๐ฅ๐ฅ๐ž๐ง๐œ๐ž: - Smart Contract Mastery: Solidity development for ERC-20/721/1155 with comprehensive security auditing and gas optimization. - DeFi Architecture: Yield farming, staking protocols, automated market makers, and liquidity pools with proven TVL growth. - Web3 Integration: React/Next.js frontends with Web3.js/Ethers.js, MetaMask connectivity, and seamless user experiences. - Multi-Chain Deployment: Ethereum, Polygon, Solana, BSC with cross-chain bridges and Layer-2 scaling solutions. Industries I Serve: DeFi (yield optimization), NFT Projects (creator monetization), Gaming (play-to-earn), Enterprise (asset tokenization), Real Estate (fractional ownership) I am a results-driven Blockchain Developer specializing in building secure, scalable, and production-grade Web3 applications that deliver measurable business value. My core expertise spans advanced Solidity smart contract engineering, DeFi protocol design, tokenomics modeling, and full-stack dApp architecture across EVM ecosystems. I actively integrate trending blockchain innovations such as Layer-2 scaling solutions (Polygon, Arbitrum), zk-rollups, account abstraction (ERC-4337), MEV-resistant contract mechanisms, modular blockchain architecture, restaking primitives, and real-world asset (RWA) tokenization. My approach focuses on gas optimization, security hardening, and high-performance contract execution. With hands-on experience in smart contract auditing, on-chain data analytics, DAO governance frameworks, cross-chain interoperability, and omnichain messaging protocols, I architect secure, future-proof Web3 ecosystems that enhance user adoption, strengthen investor trust, and enable sustainable protocol growth.

  • Solidity
  • DApp Development
  • Blockchain Development
  • Ethereum
  • Smart Contract Development
  • DeFi
  • web3.js
  • Blockchain, NFT & Cryptocurrency
  • Information Security Audit
  • Ethers.js
  • Layer 2 Blockchain
  • Tokenomics
  • Solana
  • Hardhat
Govind U.

Indore, India

$25/hr
5.0
2 jobs

I build production-grade blockchain systems โ€” not prototypes. Over 5 years I've shipped Layer-1 blockchains from scratch, DeFi platforms, NFT marketplaces, institutional payment infrastructure, and enterprise cloud deployments that run at scale. What I deliver: Smart Contracts (Solidity): ERC-20/ERC-721 tokens, staking/vesting, ICOs, DeFi trading, Chainlink oracle integrations โ€” built with Hardhat, Truffle, and OpenZeppelin. Layer-1 Blockchain Development: Engineered two production Layer-1 networks using Cosmos SDK and Ethermint with custom Golang tokenomics modules, IBC cross-chain protocol, and sub-3-second block finality. Solana / Rust: SPL token development, on-chain program architecture, PDA management. Hyperledger Fabric: Enterprise chaincode development, MSP configuration, supply chain and permissioned DLT deployments. Institutional Financial Systems: Cross-border payment infrastructure across 3 countries with Fireblocks MPC custody and AML/KYC-compliant data flows, under 2-second settlement. Cloud and DevOps: AWS (EKS, EC2, IAM), Kubernetes, Docker, CI/CD pipelines โ€” I can take a contract from architecture through to monitored production deployment. Tech I work with daily: Node.js, TypeScript, Golang, Solidity, Rust, Web3.js, Ethers.js, PostgreSQL, MongoDB, AWS, Hardhat. I have led engineering teams of up to 5, delivered on tight deadlines, and communicated clearly with both technical leads and non-technical stakeholders. If you need someone who can own the work end-to-end โ€” architecture, code, testing, and deployment โ€” let's talk.

  • Solidity
  • Blockchain
  • Ethereum
  • React
  • C++
  • Rust
  • Node.js
  • TypeScript
  • Golang
  • Kubernetes
  • PostgreSQL
  • web3.js
  • Hyperledger Fabric
  • Hardhat
  • Ethers.js
  • Smart Contract Development
  • AWS Development
  • Crypto Wallet
  • REST API

How it works

Post a job for freePost a job

Tell us what you need. Create your own job post or generate one with AI then filter talent matches.

Hire top talent fast

Consult, interview, and hire quickly, so you can meet the freelancers you're excited about.

Collaborate easily

Use Upwork to chat or video call, share files, and track project progress right from the app.

Payment simplified

Manage payments in one place with flexible billing options. Only pay for approved work, hourly or by milestone.

Don't just take our word for it

How do I hire a Solidity Freelancer in India on Upwork?

You can hire a Solidity Freelancer in India on Upwork in four simple steps:

  • Create a job post tailored to your Solidity Freelancer project scope. We'll walk you through the process step by step.
  • Browse top Solidity Freelancer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top Solidity Freelancer profiles and interview.
  • Hire the right Solidity Freelancer for your project from Upwork, the world's largest work marketplace.

At Upwork, we believe talent staffing should be easy.

How much does it cost to hire a Solidity Freelancer?

Rates charged by Solidity Freelancers on Upwork can vary with a number of factors including experience, location, and market conditions. See hourly rates for in-demand skills on Upwork.

Why hire a Solidity Freelancer in India on Upwork?

As the world's work marketplace, we connect highly-skilled freelance Solidity Freelancers and businesses and help them build trusted, long-term relationships so they can achieve more together. Let us help you build the dream Solidity Freelancer team you need to succeed.

Can I hire a Solidity Freelancer in India within 24 hours on Upwork?

Depending on availability and the quality of your job post, it's entirely possible to sign up for Upwork and receive Solidity Freelancer proposals within 24 hours of posting a job description.