Web3.js is an open source software library that helps integrate with decentralized applications built on Ethereum blockchain technologies. As Ethereum is built on blockchain, Web3.js works as a bridge between the Ethereum blockchain and its users without transcending any rules or data from the blockchain network.

A Web3.Js Developer is an experienced programmer for building decentralized applications using Ethereum development framework and the Javascript library, Web3. When developers use Web3.js, they can craft secure and reliable applications upon a wide-scale peer-to-peer blockchain network with the help of a trustless system of data storage and transfer.

Here are some projects that our expert Web3.Js Developers made real:

  • Creating user authentication features on existing web apps
  • Setting up marketplaces for NFTs
  • Integrating ETH payment systems with React dApps
  • Connecting web sites to TikTok pages
  • Crafting smart contracts on Ethereum technology
  • Writing Typescript & React code
  • Auditing smart contracts prior to deployment

It's projects like these that show the full potential of what a Web3.Js Developer can do for your project. With their knowledge of web development and proprietary scripting language, our experienced developers were able to craft advanced yet secure applications for clients that created real value for all parties involved. With this in mind, we invite you to post your own project and set out to hire a remarkable development team with Freelancer.com today.

From 23,294 reviews, clients rate our Web3.Js Developers 4.9 out of 5 stars.
Hire Web3.Js Developers

Web3.js is an open source software library that helps integrate with decentralized applications built on Ethereum blockchain technologies. As Ethereum is built on blockchain, Web3.js works as a bridge between the Ethereum blockchain and its users without transcending any rules or data from the blockchain network.

A Web3.Js Developer is an experienced programmer for building decentralized applications using Ethereum development framework and the Javascript library, Web3. When developers use Web3.js, they can craft secure and reliable applications upon a wide-scale peer-to-peer blockchain network with the help of a trustless system of data storage and transfer.

Here are some projects that our expert Web3.Js Developers made real:

  • Creating user authentication features on existing web apps
  • Setting up marketplaces for NFTs
  • Integrating ETH payment systems with React dApps
  • Connecting web sites to TikTok pages
  • Crafting smart contracts on Ethereum technology
  • Writing Typescript & React code
  • Auditing smart contracts prior to deployment

It's projects like these that show the full potential of what a Web3.Js Developer can do for your project. With their knowledge of web development and proprietary scripting language, our experienced developers were able to craft advanced yet secure applications for clients that created real value for all parties involved. With this in mind, we invite you to post your own project and set out to hire a remarkable development team with Freelancer.com today.

From 23,294 reviews, clients rate our Web3.Js Developers 4.9 out of 5 stars.
Hire Web3.Js Developers

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    13 jobs found

    I'm in search of adept FullStack Developers to maintain and enhance our web applications. Your primary responsibilities will include maintaining existing code and improving performance. Key Responsibilities: - Maintain and optimize existing web application code - Identify and implement performance improvements Ideal Skills: - Proficiency in React and Node.js - Experience with various frontend frameworks - Strong understanding of Node backend - Familiarity with version control systems This role offers flexible working hours, with both full-time and part-time opportunities available. Remote work is an option.

    $33 / hr Average bid
    $33 / hr Avg Bid
    200 bids
    UI Restyling for Web3 DApp
    6 days left
    Verified

    I'm looking for a skilled user interface designer with experience in web3 DApps to help restyle the UI of my DApp. The goal is to ensure consistency with my brand identity. You can either edit the existing code on GitHub or develop a clean new version from scratch, I am open to both options. - Brand Assets: I have design guidelines and some assets that you will be using for this project. Your expertise and previous experience with similar projects will be crucial in improving the overall look and feel of the DApp. Please provide a portfolio of your relevant work when you bid. Working policies: For projects of this type I pay upon completion and functionality. It is not fruitful to provide progress milestones.

    $164 Average bid
    $164 Avg Bid
    85 bids

    I'm looking for a skilled developer to create a Defi similar to Dextool/Dexscreener. The project will require a comprehensive understanding of cryptocurrency markets, and the ability to create a robust tracking and information system. Ideal skills and experience for this project include: - Proficiency with real-time data integration - Extensive experience with cryptocurrency-related projects - Strong analytical and problem-solving skills - Familiarity with blockchain technologies - The ability to design and develop user-friendly interfaces I need a site similar to Dexscreener for a layer 1 chain currently in testnet. a. We need to pull data from various AMMs like UniSwap, Our Dex etc b. Display those data in our design which is pretty much similar to Dexscreener c. Dex...

    $1540 Average bid
    $1540 Avg Bid
    59 bids

    I'm looking for an expert in Web3 and OCR technology to develop a web-based application for me. This application will scan gas receipts and extract specific data points - namely the total amount, date and time, and fuel quantity. The extracted data will then be stored on the Ethereum blockchain. Key Requirements: - Development of a user-friendly web interface for the application. - Implementation of OCR technology for receipt scanning. - Integration with the Ethereum blockchain for data storage. Ideal Skills: - Proficiency in Web3 and blockchain development, particularly on the Ethereum platform. - Expertise in OCR technology. - Strong skills in web application development. Please provide examples of similar projects you've worked on in your proposal.

    $173 Average bid
    $173 Avg Bid
    18 bids

    We are seeking an experienced Full Stack Web3 Developer to assist with updates and enhancements to our existing decentralized application. The ideal candidate should have a strong background in both front-end and back-end development, with a focus on blockchain technology. You will work closely with our team to implement new features, optimize performance, and ensure seamless user experience. A solid understanding of smart contracts and decentralized protocols is essential. please refer the design: You can find the project here: Please submit a quotation when bidding. note: I will add one more step to avoid bots and verify real developers. There is one issue on front end so the loading speed is very low. check what is the issue and make 1 mins video that explain what is issue and you...

    $27 / hr Average bid
    $27 / hr Avg Bid
    130 bids

    I'm seeking a seasoned full stack developer to update both the frontend and backend of our current project. The updates on the frontend involve: - Design changes to improve aesthetic and usability - Adding new features to enhance functionality - Performance improvements to ensure seamless user experience please refer the design: You can find the project here: - Strong proficiency in both frontend and backend technologies - Experience with API integration - Skills in performance tuning and optimization - An eye for detail and a commitment to delivering high-quality work - Experience with is a plus Please include an estimate.

    $26 / hr Average bid
    $26 / hr Avg Bid
    183 bids

    UI Design for a Telegram Mini-App Game We need a UI designer with experience in mobile-first design, proficient in tools like Figma or Adobe XD. They should understand user flows for task-based games, design clear navigation for resource management, and create lightweight, performance-optimized visuals for a Telegram app. Experience with in-game purchases, worker management, and chat system integration is important. Web3 project experience is a plus.

    $1021 Average bid
    $1021 Avg Bid
    64 bids
    Update Existing Web Project
    4 days left
    Verified

    Hello, I look for a developer who can update old project with crypto payment gateway. I need to build a DApp with existing project with web3 integration. Requirement technologies - Build a modal for wallet connection - Web3 integration on EVM chain - Build smart contract for payment gateway Plus experience: - Update UI with 2D & 3D animation - Experience for building web game - HTML and Canvas If you are interested in this job and you can do it, please let me know. Thanks

    $16 / hr Average bid
    $16 / hr Avg Bid
    76 bids

    Hi, We are looking for someone with the skills to help build a token voting platform. As a Blockchain Developer, you will be responsible for implementing, and supporting various blockchain applications and solutions. Skills required: - Proficient in programming languages like Solidity, JavaScript, or React.js - Experience with blockchain platforms like Ethereum, Hyperledger, or Corda - Knowledge of smart contract development and deployment - Familiarity with DApps and - Strong problem-solving and analytical skills. This is the largest project of its kind, taking over three months. We are looking for an expert-level developer who can hit the ground running and deliver high-quality blockchain solutions within the given timeframe. If you are excited about working with cuttin...

    $272181 Average bid
    $272181 Avg Bid
    33 bids

    My Dapp is experiencing issues with the Uniswap V3 swap functionality. Specifically, the problem lies with the token pair exchange - swaps are failing to execute entirely. This issue is severely disrupting the usability of my Dapp. Skills and Experience Required: - Proficient in smart contract development and Uniswap V3 - Strong troubleshooting and debugging skills - Familiarity with Dapp development - Prior experience with token pair exchanges - Knowledge of error handling in blockchain environments

    $187 Average bid
    $187 Avg Bid
    5 bids

    I'm looking for an experienced blockchain developer to create a cryptocurrency with a specific focus on its web-based wallet integration. Key Requirements: - Develop a new cryptocurrency - Implement a secure, user-friendly web-based wallet Ideal Skills: - In-depth understanding of blockchain technology - Proven experience in cryptocurrency development - Expertise in web-based application development - Strong security focus Please provide examples of your previous work in this field.

    $819 Average bid
    $819 Avg Bid
    47 bids
    Construct 3 + web3 expert -- 2
    19 hours left
    Verified

    Hello, I'm looking for someone to help us on a project. We have a construct3 basic app, based on a script (sharktap) with tonwallet connected. We would like to do this : 1. make a few "minor" changes and deploy (colors, fonts, change the main character from a shark to a dog) - we can provide the images files if needed but if you can do it as well, it's a good point 2. you can see that it has "tonwallet" attached, I would like to get a quote for having it work the same way but with "walletconnect" (or similar like metamask but we need a mobile version so I recommend WC) ---- 3. don't add this to your initial quote but I would like to know what it would cost to add an affiliate system. I can send you the source files if needed. --- please r...

    $552 Average bid
    $552 Avg Bid
    58 bids

    Hi, Hope all is well and you adjust to the new normal. We are seeking an Full-Stack Blockchain Expert skilled at , TypeScript, Firebase Database, and Solidity languages. Actually, we've done 60%, it now needs the Nextjs, animations, web3, and backend + the UI/UX development to create live web application. What you gonna do? - Troubleshoot the existed issues related to web3 integration - Leaderboard is static, needs to be dynamic. - Prizes needs ability to add multiple, currently only accepts one, - The main image is currently set to prize image, needs a new database field for main image - YouTube and Spider tanks tasks need to be added It would be great to connect by phone in the coming days and share what we are seeing and hearing, both in our website and abroad. You can get the ...

    $35 / hr Average bid
    $35 / hr Avg Bid
    70 bids

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