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.

Baseret på 18,660 bedømmelser, giver vores klienter os Web3.Js Developers 4.81 ud af 5 stjerner.
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    10 jobs fundet, i prisklassen EUR

    I'm aiming to fortify election security using an Ethereum-based voting system with facial recognition. This tool will be available to the general public; anyone should be able to use it. I am specifically interested in: - Facial recognition: This feature should accurately authenticate voter identities to minimize any potential electoral fraud. - Encrypted and transparent voting process: Every vote cast should be encrypted for security reasons and there needs to be transparency in the voting process to reinforce trust in the system. - Real-time results tracking: I want a feature that allows everyone to monitor election results in real time. This can help keep the situation transparent and everyone informed. Ideal candidates for this project would be acquainted with Ethereum, smart...

    €7 - €17
    €7 - €17
    0 bud

    I attached a screenshot that shows the problem. It shows runtimes error. and it shows some problems when connect wallet. candidate should solve that problem. it is an urgent thing, so I need to start it immediately. Requirement Skills and Experience - Proficient in ReactJS with a strong understanding of its core principles. - Experienced in debugging and error handling within React applications. - Experienced in Web3 for connect wallet - Bonus for Blockchain Detailed attention and a fast turnaround. Thank you

    €491 (Avg Bid)
    €491 Gns Bud
    112 bud

    Needs to be a simple yet nice looking interface (responsive). User will login with metamask and as the first token will be a very simple version with no taxes etc, the user will enter supply, name, symbol and decimals and will charge a small fee that will go to admin wallet and will deploy to the blockchain and send all tokens to owner/deployer. Need this to pass audits, owner cannot mint, cant make fees, all totally secure. Owner can renounce. The app/dapp will allow my address as admin to mint tokens without fee. The app/dapp will be able to create and deploy tokens on BSC and ETH. *This is version 1. We will include many other kinds of tokens onto the app after initial release.

    €363 (Avg Bid)
    €363 Gns Bud
    38 bud

    I need an AI chatbot with a free standard version and I pro version that will be free with web3 access to holders of the projects website. Will be a lot better visually and more modern that chatgpt and be responsive. Will have additional features such as initiating names for chats before user starts a new chat and/or changing the chat name after at any point. Can save/share documents generated within the chat in certain formats such as txt,pdf,csv. Can generate images and/or videos based on prompts. Can use voice to enter chat and the aibot can reply back in voice (user should be able to choose the voice from a selection) so the app can be like an AI Siri. Want it to have less limitations as chatgpt.

    €743 (Avg Bid)
    €743 Gns Bud
    56 bud

    I'm in need of expertise to resolve a recurring error in my current platform built with Flutter. The error message is "insufficient fund from gas * price + +value” and it is incredibly disruptive to the operation of the platform. I've verified I have enough gas balance in my wallet to cover the transaction. My application is utilizing an outdated version of the web3dart Flutter library. It's necessary for the freelancer to have experience working with the older versions of this library. The ideal candidate would have: - Proficient knowledge of Flutter - Extensive experience with the web3dart Flutter library - Proven track record in resolving similar bugs - Comfortable working with outdated system libraries Your task will be to: - Analyze the system and error - ...

    €27 (Avg Bid)
    €27 Gns Bud
    14 bud

    I'm in need of a skilled smart contract developer who's especially proficient in Solidity and JavaScript for a betting platform. Our application requires to fork OvertimeMarkets and adapt it to create our own betting platform. Features to be implemented are: - Smart contract with Solidity - Payment token should be PAALAI token - Deploy smart contracts to Sepolia testnet and write testcase using Hardhat or Truffle Experience and Skills Needed: - Proficiency in Solidity and is a must - Proven experience in blockchain integration, preferably in DApp projects - A strong understanding and prior work history of integrating payment systems. If you have example projects which are similar with this, please provide them.

    €575 (Avg Bid)
    €575 Gns Bud
    30 bud

    As an EVM user, I'm interested in a seasoned NodeJS developer with experience in cryptocurrency and blockchain technology. The objective here is to develop a precise, efficient, and bug-free NodeJS script that enables contract interactions on ZKSync, a layer-2 scaling solution for Ethereum. Your tasks will include: 1. Developing NodeJS script. 2. Ensuring script is attuned to ZKSync. 3. Enabling the script to send transactions involving Ethereum andn other ERC20 tokens. 4. NFT purchases. A successful completion of this task would require: - Proficiency in NodeJS - Knowledge of EVM chains - Understanding of web3 transactions - Experience in AMMs / Swap applications Please see the attached brief for more details

    €184 (Avg Bid)
    €184 Gns Bud
    27 bud

    I require a revenue sharing membership site for creators. Payouts will be on % of activity/interaction with anti cheat measures in place. Users will upload content (videos, images, text, links) such as social media sites. Creators will have a free public profile and will choose which content is free and which content is for paid members. The site will have a free video roll section with tiktok style short videos that they can scroll through. There will also be a paid members video roll with premium content. Admin will get a %, creators will get a % and referrals will get a % of the total monthly fee revenue generated. referrers can login to member area to get referral links and see stats and update payment information. Payment for the site, creators and referral partners will all by crypto...

    €753 (Avg Bid)
    €753 Gns Bud
    49 bud

    I want a manual approval dex where users cannot instantly add their tokens to the dex. Users will need an audit by a selection of preferred auditors from a list. No fee required for listing but we will have to manually approve. Will also need a token developed for the project with taxes and dex token will be default on the home page. Layout will have a chart integrated but users can decide to hide chart. Will be very modern design and responsive. Fees will go to admin. Holders of project token will not pay tx fees. Dex will trade eth and bsc pairs. Users will choose which network and will be able to trade eth pairs with eth network and bsc pairs on bsc.

    €1405 (Avg Bid)
    €1405 Gns Bud
    50 bud
    Raydium Liquidity Manager Udløbet left
    VERIFICERET

    I'm looking for a proficient developer who is familiar with Solana & Raydium. All your task is preferred to using python, and here is the task with detailed: Assuming now i'm creating a solana token (SPL) and want it tradable on Raydium, for your scripts, i could use it to: a) Add liquidity; b) Remove liquidity; c) Monitor my liquidity pool in a real time; d) I could choose remove the liquidity automatically when the pool reached a certain amount. e) Bouns task: when add liquidity by raydium ui, it would apply for a amm account & its id for each new token. all this process would take about 0.68 sol. if you could try to reduce the cost, then you're welcome to asked for a bonus payment. We do expect you are familiar with Solana, Raydium DEX, and blockchain.

    €199 (Avg Bid)
    €199 Gns Bud
    13 bud

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