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.

A partir das avaliações de 17,075, os clientes avaliam nosso Web3.Js Developers 4.87 de 5 estrelas.
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    12 trabalhos encontrados, preços em USD

    I am searching for a qualified blockchain developer to lead a project on a private network. I have a specific use case and application in mind and anticipate some intermediate-level complexity. The desired blockchain platform is to create a private blockchain platform. If chosen, I expect the developer to be able to work on the project with minimal guidance, and all nuanced aspects with regard to the specific use case would be provided. Close communication throughout the process is key. They should be experienced in creating private blockchain platforms and be able to work efficiently to ensure success.

    $13 / hr (Avg Bid)
    $13 / hr Média
    6 ofertas

    Razl has an enterprise asset management platform that needs to send/receive data from a web based desktop portal to/from users in the field who will be using an iPad app. We need an Australian based react native developer that will translate the HTML/Javascript platform that uses: 1. Jquery 2. widgets (grids, comboboxes, etc) 3. Primus nodejs module for websockets We have the current UI of the app that was written in Titanium as a guide of what we need. The app will evolve for other UI designs for iOS & Android, using separate instances from the Razl Asset Management platform.

    $2130 (Avg Bid)
    Local ADC
    $2130 Média
    43 ofertas

    Number of Screen: 1. Login Screen 2. Create Account Screen 3. Forgot Password 4. Import Wallet 5. Home Screen 6. Send /Receive Coin Screen / Transaction 7. Transaction confirmation screen 8. Transaction List (tabs) 9. Token List 10. Add Network Screen 11. Modal popup Functions: 1. Create a function to create a EVM based wallet a. Return: Output mnemonic phrase 2. Create a function to restore wallet using mnemonic phrase 3. Create a function to encrypt private key using password 4. Create a function to create N number of wallet 5. Create a function to import wallet , input would be private key or keystore json. 6. Write a function to get balance of all wallets

    $250 - $750
    $250 - $750
    56 ofertas

    Critical review a web3 developer dashboard. Its rough, looking for your opinion, what you would add, initial stages only

    $32 / hr (Avg Bid)
    $32 / hr Média
    9 ofertas

    I am looking for a skilled blockchain developer to help me test the alpha version of my dapp before its launch. The dapp is built on the Ethereum platform and I need someone to specifically test the user interface functionalities. The project needs to be completed as soon as possible. Skills and experience required: - Strong knowledge and experience in blockchain development - Proficiency in working with the Ethereum platform - Experience in testing user interfaces - Attention to detail and ability to identify and report any bugs or issues - Unit test of projects carefully - Report detailed via document

    $18 / hr (Avg Bid)
    $18 / hr Média
    25 ofertas

    I am looking for a freelancer to develop a simple web3 chrome extension with the following requirements: Functionality: - simple web3 extationson to send via custom provider - lock extationson whenever browser closed or 5 min of inactivity - Web3 wallet integration - The extension should be able to integrate with DApps - one sample dapp which can show extationson is working for send function User Interface (UI) Design: - Simple and minimalistic design preferred Security Requirements: - Standard Chrome extension security measures should be implemented Ideal Skills and Experience: - Strong knowledge and experience in web3 development and Chrome extension development - Familiarity with integrating web3 wallets and DApps - Proficiency in UI design, particularly in creating simple and min...

    $73 (Avg Bid)
    $73 Média
    21 ofertas

    I am looking for a skilled developer to create a betting website using Ethereum Blockchain. The ideal candidate should have experience in developing similar projects and be familiar with Ethereum Blockchain technology. Betting Options: - The website will primarily offer sports betting options, allowing users to place bets on various sporting events. Website Features: - I am open to suggestions and would like the developer to propose specific features and functionalities for the website. - The developer should have a strong understanding of the betting industry and be able to provide recommendations for innovative and user-friendly features. Design Assistance: - I am in need of full design assistance for the website. - The developer should have expertise in web design and be able to crea...

    $758 (Avg Bid)
    $758 Média
    25 ofertas

    We are a ambitious startup composed of a small, dedicated team of 5. We are developing NFT marketplace and looking for React Expert who can build the front-end and integrate the smart contract.

    $33 / hr (Avg Bid)
    $33 / hr Média
    76 ofertas

    Crypto wallet web app to manage my token and other listing tokens in future

    $167 (Avg Bid)
    $167 Média
    20 ofertas
    web 3 expert 21 horas left

    Project Title: Web 3 Expert I am in need of a web 3 expert with specific expertise in Decentralized Finance (DeFi). The ideal candidate should have experience in blockchain development and NFT development. I am looking for ongoing support rather than a specific project. The web 3 expert will be responsible for providing continuous assistance and guidance. The scale of the project is large, so the candidate should have experience in handling large-scale projects. Skills and Experience Required: - Expertise in Decentralized Finance (DeFi) - Proficiency in blockchain development - Experience in NFT development - Strong understanding of web 3 technologies - Ability to provide ongoing support and assistance - Proven track record in handling large-scale projects

    $791 (Avg Bid)
    $791 Média
    24 ofertas
    P2P Betting Blockchain DaPP 21 horas left

    Project Title: P2P Betting Blockchain DaPP I am looking for a developer who can build a P2P Betting Blockchain DaPP using the Polygon blockchain. The ideal candidate should have experience and knowledge in working with Polygon and integrating it into decentralized applications. Features: - The DaPP should have peer-to-peer betting functionality, allowing users to place bets directly with each other. - It should also have smart contract functionality, enabling automated execution of bets and payouts. - Real-time transaction processing is essential to ensure smooth and efficient betting experience for users. Security: - The DaPP should have standard security measures in place to protect user data and funds. - Implementing best practices and industry-standard security protocols is crucial ...

    $750 - $1500
    $750 - $1500
    13 ofertas

    We are a ambitious startup composed of a small, dedicated team of 5. We're at an exciting stage in our development as we're looking to expand our digital capabilities and enhance our online marketplace. Join us and contribute to our journey of growth and innovation. Role Summary: As our Senior Full Stack Developer, you will play a pivotal role in driving the next iteration of our online marketplace using React, Node, and Typescript. We're searching for an innovative and product-focused engineer who possesses a strong sense of curiosity about our business and customers. You will be integral to the decision-making process, helping to influence our product & technology roadmap, and be accountable for the implementation of solutions from end-to-end. Responsibilities: - D...

    $34 / hr (Avg Bid)
    $34 / hr Média
    94 ofertas

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