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 23,918 reviews, clients rate our Web3.Js Developers 4.8 out of 5 stars.
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    8 jobs found, pricing in USD

    I'm currently facing challenges with WalletConnect v2 integration on my DEX running on the Binance Smart Chain. The issues include: - Unable to connect wallet - Incorrect token balances displayed - Transactions are not being processed successfully Ideally, I'm looking for a Web3 developer who comes with a strong understanding of WalletConnect v2 integration and has prior experience with DEXs on the Binance Smart Chain. Proficiency in dealing with wallet connection issues, balance discrepancies, and transaction failures is required for this job.

    $487 (Avg Bid)
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    39 bids

    As an established blockchain company, we're currently in the market for a seasoned Ethereum blockchain specialist to join our team. This individual will primarily focus on DeFi, harnessing their expertise to further strengthen our offerings. Responsibilities: - DeFi Blockchain Development Skills & Experience: - Proven experience as a Senior Blockchain Engineer, particularly within Ethereum. - A strong understanding and experience in DeFi. - Developed smart contracts experience is a plus but not necessary. - Highly capable in designing sophisticated blockchain architecture. - Demonstrable experience implementing effective security measures. We look forward to receiving proposals from candidates with a robust understanding of Ethereum and a strong interest in developing for DeF...

    $2269 (Avg Bid)
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    25 bids

    I need 8 avatars created (I will give 8 images of examples I need) and 8 different voices. The avatar will be from chest up and will be basically still and will be able to communicate with the user in real time back and forth like a real human conversation. This will be an adult niche ai chat bot so will need to be programmed accordingly. It should be a very simple but professional and responsive interface and easy to manage for me. Will have crypto membership payments and simple affiliate referral program. More work will be available ongoing.

    $745 (Avg Bid)
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    47 bids

    I'm looking for a skilled developer to work on a short project. The main focus will be to build frontend components and optimize the website's performance. Key Responsibilities: - Crafting robust, modular, and maintainable frontend components for an informational website. - Implementing performance optimizations to ensure the site loads quickly and operates efficiently. Ideal Candidate: - Proficient with and React, with a strong understanding of frontend development practices. - Experienced with performance monitoring and optimization techniques for web applications. - Familiar with minimalist design principles for a clean, simple, and user-friendly website interface. If you're a developer with a keen eye for frontend design and a knack for optimizing website per...

    $4 / hr (Avg Bid)
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    41 bids

    I am looking for a proficient developer who can build a decentralized application (DApp) aimed at the education sector. Key features include: - User registration and login system: To ensure smooth and secure access for users, I want a registration and login system based purely on the traditional email and password approach. - Interactive learning modules: These should incorporate diverse content types such as video lectures, interactive quizzes, and downloadable resources. - Token Wallet Integration: The DApp should allow users to hold and manage tokens. Proficiency in smart contract development and encryption is a must. - Initial Coin Offering (ICO) & DEX Trading: The project extends to setting up an ICO for the tokens and enabling their trade on decentralized exchanges. Candidat...

    $1315 (Avg Bid)
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    105 bids

    We have developed our custom contract based on ERC721A that handles bulk minting in a single transaction. Now, I would need your help in doing the following tasks A- Uploading to IPFS: We have around 6k images. Out of which we would like to deploy 1K now and upload the rest of images for the collection later during our next sale phase. For IPFS pinning services, we would like to go with the Third Web - Here, I know that we can update uri for uploading the remaining images later for the remaining Please let me know if it would affect anyhow to the buyers who purchased NFTs before uploading these images. B - Regarding deployment on Testnet - Yes, before deploying the contract on Mainnet, we would like to check things on Testnet. Now, please let me know if there is any safe method of ...

    $22 / hr (Avg Bid)
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    26 bids

    I'm looking for experienced someone in integrating web3modal v3 into app. Please bid expert only. Thanks.

    $23 / hr (Avg Bid)
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    54 bids
    blockchain 1 day left

    Estoy valorando el realizar un hardfork de la blockchain de BTC y necesito ayuda para eso.

    $39 / hr (Avg Bid)
    $39 / hr Avg Bid
    10 bids

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