Hire the Best DApps Professionals

Clients rate our DApps Professionals
Rating is 4.6 out of 5.
4.6/5
Based on 232 client reviews
Anupam B.

Kolkata, India

$15/hr
5.0
22 jobs

I've architected a full Layer-1 blockchain from scratch consensus, validators, staking and built AI agents that transact on-chain autonomously. 100% Job Success, every rated project 5 stars. I'm a Blockchain & AI Developer who ships complete products end-to-end: smart contracts, backends, web dApps, and mobile apps. Clients come to me when they need one developer who understands the full stack from on-chain logic to the app store. WHAT I DELIVER Agentic AI & On-Chain Payments — Autonomous AI agents transacting via the x402 protocol: machine-to-machine micropayments, zero human intervention. Built with LangChain, CrewAI, and LLM APIs. Custom Layer 1 Blockchains Complete chains with consensus, validator infrastructure, staking economics, block explorer, and faucet delivered with UAT reports and scaling roadmaps. Solana Development Anchor programs and MEV-aware trading systems with Jito bundle execution, backed by NestJS/PostgreSQL. Full dApp Development NFT marketplaces, DeFi tools, token platforms across Ethereum, Polygon, and EVM chains wallet integration to polished frontend. Mobile Apps Cross-platform Flutter apps with Web3 integration, including a multilingual P2P crypto trading platform with USDT escrow. AI Products & Automation LLM-powered systems, multi-agent workflows, AI fact checking infrastructure, and intelligent automation pipelines. Enterprise Integration Hyperledger Fabric systems, including edge-device deployments with tamper-proof data integrity. STACK Rust • Solidity • C++ • TypeScript • Python • React/Next.js • Node.js/NestJS • Flutter • Anchor • Web3.js • LangChain • CrewAI • IPFS • Hyperledger • PostgreSQL • MongoDB HOW I WORK Clients hand me a problem statement, not a spec and receive a production system with documentation, testing reports, and a roadmap. Recent feedback: "very professional and fast, will hire again." Whether it's a smart contract, a full dApp, a mobile app, or an AI agent system I build it production-ready. Let's scope your project.

  • web3.js
  • MongoDB
  • Python
  • C++
  • Blockchain
  • Golang
  • Solidity
  • Rust
  • Solana
  • Ethereum
  • Bitcoin
  • Artificial Intelligence
  • AI Agent Development
  • Machine Learning
  • Next.js
  • IPFS
  • Hyperledger Fabric
  • Web3
  • DApp Development
  • ZK Framework
Sunny K.

Jawalamukhi, India

$20/hr
5.0
212 jobs

👑𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐂𝐨𝐧𝐬𝐮𝐥𝐭𝐚𝐧𝐭₿⃨ 🥇10+ years of 𝑺𝑶𝑳𝑰𝑫 experience 🕒 24*7 ✨ With over 10+ years of high-demand experience in 𝗯𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁, I specialize in delivering robust 𝗳𝗿𝗼𝗻𝘁-𝗲𝗻𝗱 and 𝗯𝗮𝗰𝗸-𝗲𝗻𝗱 solutions for 𝗯𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻-𝗽𝗼𝘄𝗲𝗿𝗲𝗱 𝗮𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀. My expertise covers comprehensive smart contract development, including 𝗦𝗼𝗹𝗶𝗱𝗶𝘁𝘆 and 𝗥𝘂𝘀𝘁 for platforms like 𝗘𝘁𝗵𝗲𝗿𝗲𝘂𝗺 and 𝗦𝗼𝗹𝗮𝗻𝗮. I excel in architecting, implementing, and auditing 𝗱𝗲𝗰𝗲𝗻𝘁𝗿𝗮𝗹𝗶𝘇𝗲𝗱 solutions tailored for industries like 𝗙𝗶𝗻𝘁𝗲𝗰𝗵, where 𝘁𝗼𝗸𝗲𝗻𝗶𝘇𝗮𝘁𝗶𝗼𝗻, 𝘀𝗲𝗰𝘂𝗿𝗶𝘁𝘆, 𝗮𝗻𝗱 𝘀𝗰𝗮𝗹𝗮𝗯𝗶𝗹𝗶𝘁𝘆 are essential. By leveraging blockchain’s power, I create innovative applications that support 𝗱𝗲𝗰𝗲𝗻𝘁𝗿𝗮𝗹𝗶𝘇𝗲𝗱 𝗳𝗶𝗻𝗮𝗻𝗰𝗲 (𝗗𝗲𝗙𝗶), 𝗻𝗼𝗻-𝗳𝘂𝗻𝗴𝗶𝗯𝗹𝗲 𝘁𝗼𝗸𝗲𝗻𝘀 (𝗡𝗙𝗧𝘀), 𝐒𝐦𝐚𝐫𝐭 𝐂𝐨𝐧𝐭𝐫𝐚𝐜𝐭 𝐀𝐮𝐝𝐢𝐭𝐨𝐫 and 𝗮𝗱𝘃𝗮𝗻𝗰𝗲𝗱 𝘀𝗺𝗮𝗿𝘁 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁 functionality, ensuring secure and efficient solutions. My approach includes precise requirement 𝗮𝗻𝗮𝗹𝘆𝘀𝗶𝘀, 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗽𝗹𝗮𝗻𝗻𝗶𝗻𝗴, 𝗲𝗳𝗳𝗶𝗰𝗶𝗲𝗻𝘁 𝗰𝗼𝗱𝗶𝗻𝗴, 𝘁𝗵𝗼𝗿𝗼𝘂𝗴𝗵 𝗱𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴, 𝗮𝗻𝗱 𝘀𝗲𝗮𝗺𝗹𝗲𝘀𝘀 𝗱𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁. With minimal supervision, I ensure each stage aligns with project goals, producing solutions that are both innovative and reliable. 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀 : - ============================================================================= 🔥𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻: 𝗕𝗶𝘁-𝗰𝗼𝗶𝗻, 𝗘𝘁𝗵𝗲𝗿𝗲𝘂𝗺, 𝗦𝗼𝗹𝗮𝗻𝗮 ,𝗘𝗢𝗦, 𝗛𝘆𝗽𝗲𝗿𝗹𝗲𝗱𝗴𝗲𝗿, 𝗦𝘂𝗯𝘀𝘁𝗿𝗮𝘁𝗲, 𝗡𝗙𝗧, 𝗦𝗼𝗹𝗶𝗱𝗶𝘁𝘆: 𝗲𝗿𝗰𝟮𝟬/𝗗𝗲𝗙𝗶, 𝗲𝗿𝗰𝟳𝟮𝟭/𝗡𝗙𝗧. 🔥𝗙𝗿𝗼𝗻𝘁-𝗲𝗻𝗱: 𝗥𝗲𝗮𝗰𝘁.𝗷𝘀, 𝗡𝗲𝘅𝘁, 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁 (𝗘𝗦𝟲), 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁, 𝗔𝗻𝗴𝘂𝗹𝗮𝗿, 𝗩𝘂𝗲.𝗷𝘀 🔥𝗕𝗮𝗰𝗸-𝗲𝗻𝗱: 𝗡𝗼𝗱𝗲.𝗷𝘀, 𝗣𝗛𝗣 𝗟𝗮𝗿𝗮𝘃𝗲𝗹, 𝗙𝗶𝗿𝗲𝗯𝗮𝘀𝗲. 🔥𝗗𝗕: 𝗠𝘆𝗦𝗤𝗟, 𝗠𝗼𝗻𝗴𝗼 𝗗𝗕 𝗣𝘂𝗯𝗹𝗶𝗰 𝗕𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: - ============================================================================= ✔ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗶𝗻𝗴 𝘀𝗺𝗮𝗿𝘁 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 𝘂𝘀𝗶𝗻𝗴 𝗮 𝗦𝗼𝗹𝗶𝗱𝗶𝘁𝘆 𝗽𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗹𝗮𝗻𝗴𝘂𝗮𝗴𝗲. ✔ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗶𝗻𝗴 𝗥𝗣𝗖 𝘂𝘀𝗶𝗻𝗴 𝗰𝗹𝗶𝗲𝗻𝘁 𝗹𝗶𝗯𝗿𝗮𝗿𝗶𝗲𝘀 𝘀𝘂𝗰𝗵 𝗮𝘀 𝗪𝗲𝗯𝟯 ✔ 𝗦𝘁𝗮𝘁𝗶𝗰 𝗮𝗻𝗮𝗹𝘆𝘀𝗶𝘀 𝗼𝗳 𝘀𝗺𝗮𝗿𝘁 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 𝗳𝗼𝗿 𝗴𝗮𝘀 𝗰𝗼𝗻𝘀𝘂𝗺𝗽𝘁𝗶𝗼𝗻 𝗮𝗻𝗱 𝗼𝗽𝘁𝗶𝗺𝗶𝘇𝗮𝘁𝗶𝗼𝗻 𝘂𝘀𝗶𝗻𝗴 𝗥𝗲𝗺𝗶𝘅 𝗜𝗗𝗘. ✔ 𝗦𝗲𝗰𝘂𝗿𝗶𝗻𝗴 𝘀𝗺𝗮𝗿𝘁 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 𝘂𝘀𝗶𝗻𝗴 𝗹𝗶𝗯𝗿𝗮𝗿𝗶𝗲𝘀 𝗹𝗶𝗸𝗲 𝗢𝗽𝗲𝗻𝗭𝗲𝗽𝗽𝗲𝗹𝗶𝗻. ✔ 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗶𝗻𝗴 𝗘𝘁𝗵𝗲𝗿𝗲𝘂𝗺 𝗱𝗮𝗽𝗽𝘀 𝘂𝘀𝗶𝗻𝗴 𝘁𝗵𝗲 𝗧𝗿𝘂𝗳𝗳𝗹𝗲 𝗳𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸. ✔ 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻 𝘄𝗶𝘁𝗵 𝗰𝗿𝘆𝗽𝘁𝗼 𝘄𝗮𝗹𝗹𝗲𝘁𝘀 𝘀𝘂𝗰𝗵 𝗮𝘀 𝗠𝗲𝘁𝗮𝗺𝗮𝘀𝗸. ✔ 𝗦𝗸𝗶𝗹𝗹𝗲𝗱 𝗶𝗻 𝗹𝗲𝘃𝗲𝗿𝗮𝗴𝗶𝗻𝗴 𝗦𝗣𝗟 𝗹𝗶𝗯𝗿𝗮𝗿𝗶𝗲𝘀 𝗳𝗼𝗿 𝗿𝗮𝗽𝗶𝗱 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 ✔ 𝗗𝗲𝗽𝗹𝗼𝘆𝗶𝗻𝗴 𝘀𝗺𝗮𝗿𝘁 𝗰𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 𝗼𝗻 𝘁𝗲𝘀𝘁 𝗻𝗲𝘁𝘄𝗼𝗿𝗸𝘀 𝘀𝘂𝗰𝗵 𝗮𝘀 𝗿𝗼𝗽𝘀𝘁𝗲𝗻/𝗿𝗶𝗻𝗸𝗲𝗯𝘆 𝗮𝘀 𝘄𝗲𝗹𝗹 𝗮𝘀 𝗘𝘁𝗵𝗲𝗿𝗲𝘂𝗺 𝗺𝗮𝗶𝗻𝗻𝗲𝘁. 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 out—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

  • DApp Development
  • Smart Contract
  • Blockchain Development
  • Solidity
  • 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
Noman H.

Manama, Bahrain

$35/hr
5.0
3 jobs

Hi, I am Noman Ul Haq, a blockchain developer and full-stack web expert specializing in building secure, scalable, and intuitive Web3 solutions. I help businesses and startups launch, tokenize, and scale through smart contract development, DApp deployment, and cutting-edge DeFi architecture. With a strong background in both backend smart contracts and frontend UI/UX, I deliver end-to-end platforms ready for real-world adoption. 🔗 What I Offer: ✅ Smart Contract Development (ERC-20, ERC-721, ERC-1155, SPL, custom logic) ✅ DApps & DeFi Platforms (staking, farming, governance, bridging, DAO setup) ✅ ICO/IDO Launchpad Solutions (multi-stage presale, token creation, vesting, liquidity lock) ✅ NFT Marketplaces (minting, trading, royalties, lazy minting) ✅ Web Development (React, Next.js, Tailwind CSS, full UI/UX integration) I’ve successfully delivered blockchain systems across Ethereum, BSC, Solana, Polygon, and more. Whether you're building your token economy, launching a DeFi ecosystem, or designing a user-friendly NFT marketplace, I can help bring your vision to life. Let’s turn your idea into a Web3 reality — reach out, and let’s get started.

  • Blockchain
  • Binance Coin
  • Blockchain Development
  • JavaScript
  • Node.js
  • Ethereum
  • NFT Minting
  • Smart Contract
  • ERC-721
  • React
  • NFT Marketplace
  • ERC-20
Akshay S.

Indore, India

$30/hr
5.0
39 jobs

With 8+ years of experience as a Full Stack Developer, I specialise in creating dynamic, high-performance web applications. My expertise spans both front-end and back-end development, as well as blockchain technologies. Whether you need a seamless, user-friendly interface or a robust, scalable backend, I deliver solutions that exceed expectations. I have a proven track record of success, demonstrated by my top-rated plus Upwork profile and 100+ completed projects. My skills include: - Front-end: React, Vue.js, HTML5, CSS3, JavaScript/TypeScript - Back-end: Node.js, Express.js, RESTful APIs - Blockchain: Smart contracts, Solidity, Ethereum, Web3.js - Database: MySQL, PostgreSQL, MongoDB - Version Control: Git/GitHub Let’s discuss how I can help bring your vision to life and drive your project to success!

  • DApps
  • Python
  • Metaverse
  • Django
  • Blockchain Architecture
  • Blockchain
  • Solidity
  • web3.js
  • Smart Contract
  • NFT Marketplace
  • Blockchain Development
  • Crypto Wallet Development
  • Docker
  • Solana
  • Ethereum
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. 𝗥𝗲𝗰𝗲𝗻𝘁 𝗖𝗹𝗶𝗲𝗻𝘁 𝗥𝗲𝘀𝘂𝗹𝘁𝘀: -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 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: 𝗦𝗺𝗮𝗿𝘁 𝗖𝗼𝗻𝘁𝗿𝗮𝗰𝘁𝘀 & 𝗦𝗲𝗰𝘂𝗿𝗶𝘁𝘆: Ethereum, Polygon, BNB Chain, Solana using Solidity and Rust. Expert in gas optimization, security auditing, and vulnerability prevention with 200+ deployed contracts. 𝗗𝗲𝗙𝗶 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Staking protocols, lending platforms, liquidity pools, and automated market makers (AMMs). Specialized in tokenomics design and yield farming mechanisms. 𝗡𝗙𝗧 & 𝗧𝗼𝗸𝗲𝗻 𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀: ERC-20, ERC-721, ERC-1155 implementations, NFT marketplaces, and custom tokenomics. Experience with 40+ successful token launches. 𝗱𝗔𝗽𝗽 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲: 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.

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

Corona, California

$30/hr
4.5
27 jobs

I build AI systems that replace missed calls, slow replies, and manual admin work and I build the full digital infrastructure (websites, apps and booking systems) they run on. 🎯 AI AUTOMATION 🔹 AI Calling Agents (Voice Receptionists) - Book, cancel, and reschedule appointments automatically - Take orders and handle customer requests - Answer 24/7, in multiple languages - Qualify leads and route calls 🔹 AI Chatbots — Web, WhatsApp, Instagram, SMS Conversational agents that convert, not just canned FAQ bots. 🔹 Prompt Engineering Designing and optimizing prompts that make AI models reliable and production-ready at scale. 💻 FULL-STACK DEVELOPMENT 🔹 UI/UX Design & Full-Stack Web/App Development 🔹 Bubble-io, Framer, Webflow — MVP & app builds 🔹 WordPress development & website builds 🔹 End-to-end product builds — Design through deployment Why this combination matters: an AI agent is only as good as the system it lives in. I don't just hand you a chatbot. I can build your booking flow, your website, your app, and the AI layer on top, so everything works together instead of being duct-taped from five different freelancers. ✅ TRACK RECORD - 100% Job Success Score - $10K+ earned, 23 completed projects - Clear scoping, realistic timelines, no over-promising 📩 Tell me what's slowing your business down — missed calls, an outdated site, or repetitive manual work and I'll tell you honestly what it'd take to fix it.

  • Ecommerce
  • Ecommerce Website
  • International Development
  • Product Development
  • Mobile Game
  • Android App Development
  • App Development
  • iOS Development
  • Smartphone

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 DApps Freelancer on Upwork?

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

  • Create a job post tailored to your DApps Freelancer project scope. We’ll walk you through the process step by step.
  • Browse top DApps Freelancer talent on Upwork and invite them to your project.
  • Once the proposals start flowing in, create a shortlist of top DApps Freelancer profiles and interview.
  • Hire the right DApps 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 DApps Freelancer?

Rates charged by DApps 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 DApps Freelancer on Upwork?

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

Can I hire a DApps Freelancer 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 DApps Freelancer proposals within 24 hours of posting a job description.