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 19,832 reviews, clients rate our Web3.Js Developers 4.83 out of 5 stars.
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    Write Smart Contract on TRON 6 days left

    Write and integrate Smart Contract on TRON Blockchain for USDT for a membership Portal. Smart Contract must be verified and name should be portal name.

    $266 (Avg Bid)
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    13 bids

    I'm looking for a talented freelancer to work on a React decentralized exchange (DEX) project. For this project, I'm looking for someone with experience in JavaScript/Node.js, HTML/CSS, and React technologies. The successful applicant should have plenty of past work and demonstrable experience to draw from, as well as a detailed project proposal. It's Urgent and Long tems

    $176 (Avg Bid)
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    16 bids
    investment dashboard 5 days left

    "Investment Dashboard" for the site by cloning their frontend and adding a new page to it. Overview We will be making an "Investment Dashboard" for the site by cloning their frontend and adding a new page to it. Investment Dashboard UI: Codebase: if the above is showing compilation errors, try: Repo Usage: First, download the above and start the project using Yarn Install and set up Metamask extension on your browser On localhost:3000 you'll see the bomb-frontend homepage come up. Note that it contains elements used elsewhere like price of token, total supply of token, etc. Visit Farm, Boardroom, and Bond pages to see where the values for the other elements in our UI are coming from With the above, we can see that the task is mainly develop...

    $10 (Avg Bid)
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    3 bids

    We are looking for an experienced DApp developer to build a website capable of staking TRON token. The website should have multiple staking pools with different APR and staking periods. The ideal candidate will have experience with building similar DApps and is familiar with the TRON ecosystem. Responsibilities: Develop a DApp website capable of staking TRON token Create multiple staking pools with different APR and staking periods Integrate a user-friendly UI/UX for easy navigation Implement smart contracts for automatic staking and unstaking Ensure the security and scalability of the DApp Requirements: Strong experience in DApp development Proficiency in smart contract development and Solidity programming language Knowledge of the TRON ecosystem and its tools such as Truffle, Remix, an...

    $909 - $1817
    $909 - $1817
    0 bids

    Greetings everyone. We are looking for a freelancer with more than 5 years experience on the fields of Blockchain, smart contracts and Web 3. Requirements - Desing and Logo of platform - Smart Contract of Token (Tokenomics needed to be in logic of smart contract and the smart contract to have the staking logic too) - Integration of Metamask , Coinbase and Trust wallet - Connecting price from 20 different exchangers API (Selling Price - Asking Price - Average Price) - Users to be able to buy subscriptions to use the services. Subscription must be able to get paid through our token and through another 10 tokens we will share with you - Creating Admin Panel from where we can do the following : backend we must connect trading view chart and from admin us to be able to draw technical...

    $5394 (Avg Bid)
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    10 bids
    NFT gated project 4 days left

    Build the mining and loan protocol in token gated SocialFi ecosystem.

    $1219 (Avg Bid)
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    22 bids

    I want a app which will store your whole mobile pn block chain Like I have mobile one and I sign up and I stored it on block chain Then I will take different mobile sign up put the credentials and access mobile one. And will need donate option in it and the mobile will be live no need to download. UI/UX should be good. Also keep in mind that I am student so funding will be less

    $6082 (Avg Bid)
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    3 bids

    It’s working fine but not the best performance We want that enhanced Also, some of the fonts are epic, when you create trade you can see the fonts they are bad Also, the token drop-downs are not perfect The first drop-down doesn’t show the whole coin list And the position of the limo and market button when you want to swap I believe if the developer is able to test the current ui he can also point out other things he will note We just want the dapp working perfect and fetch data for the dashboard also. The chart is fixed but doesn't work when deployed online only works locally not sure why it's being blocked The trade data font are not well formated…this is the preffered font --font-sm: 1.4rem; --font-base: 1.5rem; --font-md: 1.6rem; --font...

    $162 (Avg Bid)
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    10 bids
    Build me an app 3 days left

    I want a app which will store your whole mobile pn block chain Like I have mobile one and I sign up and I stored it on block chain Then I will take different mobile sign up put the credentials and access mobile one. And will need donate option in it and the mobile will be live no need to download. UI and UX must be good

    $18 (Avg Bid)
    $18 Avg Bid
    2 bids
    LynneStays 2 days left

    A DApp that allows people to pay for short-term hotel rentals or Airbnb easily and simply. Something similar to AirBNB

    $2782 (Avg Bid)
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    12 bids

    We are looking for Ethereum and web3 experts to make our Web3 project a success. Our team already includes talented designers and front-end developers, and all the groundwork has been finished to start our project. Following the launch of the NFT mining site, we plan to launch several related websites such as games, airdrops, NFT marketplaces, and DEX. Review project plans and explore possibilities. Our projects are both urgent and long-term, so we need the fastest experts. At first please check our project to get all information and roadmap, check the implementation or possibility, then contact me. A quick and complete implementation will increase your chances of being hired. At first I recommend you to check the project. Please explain to me about errors that occurs at the first on the...

    $4613 (Avg Bid)
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    32 bids

    hey i have a code on python that solves a berth allocation problem. The code gets the data from excel file and returns the results on excel. I want to make it get the data from blockchain (so the user has to upload data on a blockchain) and return the results there. I tried it with infura, i have some scripts but didn tmanage to finish it. can u help ? i have scripts for the blockcahin but didnt manage to make it work

    $22 (Avg Bid)
    $22 Avg Bid
    7 bids

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