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.

Asiakkaamme antoivat 21,348 arvostelussa keskimääräisen arvosanan Web3.Js Developers 4.79 / 5 tähteä.
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    Trophy icon Solidity Guru for Dynamic Smart Contracts 13 päivää left

    I'm seeking a highly experienced Web3 coder for a project focused on implementing dynamic smart contract functionalities. Key Responsibilities: - Design and develop dynamic smart contract - Implement upgradable contracts to ensure longevity and adaptability - Utilize your expertise in Solidity to carry out these tasks effectively This project aims to create a dynamic smart contract that can upgrade itself. If you have worked on similar projects or have the necessary skills, your expertise will be highly appreciated. This is not just about writing codes; your innovative input will be an added advantage. Ideal Skills and Experience: - Proven experience as a Web3 coder - Mastery of Solidity - Extensive experience in smart contract coding - Proven ability to develop dynamic and upgrad...

    €46 (Avg Bid)
    Taattu
    €46
    1 työtä

    I'm looking for an experienced developer to create a seamless wallet system for my website. Here are the key functionalities required: - An ability to make deposits and withdrawals. - Provision of a transaction history. The wallet system needs to connect with a third party Crypto API, so experience with cryptocurrency APIs is a must. The ideal candidate will have: - Solid experience with API integration, especially cryptocurrency-related ones. - An understanding of payment gateway handling. - Demonstrable knowledge of website development and back-end system work. Only bid if you have hands-on experience with these systems and can work within deadlines.

    €80 (Avg Bid)
    €80 Keskimäär. tarjous
    10 tarjoukset

    I am seeking an expert knowledgeable about hybrid (PoW and PoS) TRC20 token mining. This project is aimed at generating passive income through the successful mining of these tokens. Skills/Experience: - Expertise in PoW and PoS systems - A sound understanding of TRC20 tokens and their mining process - Proven experience in creating profitable mining operations Please note no specific target audience has been identified, so the mining strategy should be versatile enough to be adapted if necessary. I encourage applicants from diverse backgrounds. The successful applicant will ultimately be able to demonstrate a successful track record of creating and managing effective mining strategies. Objectives: - Develop and implement a hybrid TRC20 token mining strategy - Share knowledge and...

    €25 (Avg Bid)
    €25 Keskimäär. tarjous
    2 tarjoukset

    Hello there, I am looking for a blockchain developer to create a simple casino app for me. This is a sample website I want. I want to build the blockchain casino game website using React, Node, Ethereum, Solana, Web3.js. I want to build the website ASAP and you must be web/blockchain expert. Critical skills and experience needed: - Familiarity with Ethereum,Solana Blockchain Development - Previous experience in Casino Game Development - Understanding of User Interface Design for multiple devices - Ability to provide game design suggestions - Open to work on device compatibility decisions. Thanks.

    €493 (Avg Bid)
    €493 Keskimäär. tarjous
    50 tarjoukset

    We aim to develop an easy app consisting of a front page with 2-3 custom fields, wallet connectivity, and a database. Users should be able to input information into these fields, create an inscription based on this, and have the data saved in the database (along with some additional flags). What we're looking for: Experience with BTC inscriptions or a strong background in the BTC front-end stack. Please provide examples of your previously developed applications with an offer.

    €31 / hr (Avg Bid)
    €31 / hr Keskimäär. tarjous
    23 tarjoukset

    I'm in need of assistance to open a website with DApp and smart contract trigger in Discover using the OKX Wallet. Understanding and experience with JavaScript, Python, and Solidity would be welcome, but not strictly required. Ideal Skills and Experience: - Intermediate experience with DApps and smart contracts - Understanding of blockchain and crypto wallets, specifically OKX Wallet - Ability to work independently and suggest solutions, being a core part of the decision-making process - Hands-on experience with at least one of the following: JavaScript, Python, Solidity Relevant Experience: Freelancers bidding on this project should provide experiences that demonstrate their understanding and skill in working with DApps, smart contracts, and potentially programming languages such...

    €191 (Avg Bid)
    €191 Keskimäär. tarjous
    52 tarjoukset

    Website React/ – UI – Mobile Responsive Compatible with Chrome, IE, Brave, Opera Web3 – Wallet Connect v2 – OKX Wallet – Binance Wallet ---- 1. Header 1.1. Enter Metaverse We will embed our WebGL game demo in this page. 1.2. Mainnet Events 1.2.1. Token Sale We will have token sales in this page. Should be Round #, Token Allocation, Price, Status, View under the Round Information. Should be Status (Live, Paused, Expired), Price, Buy Token with Max button, Buy Time, Lock Time 1.2.2. Vesting/Claim Portal 1.2.2.1. Vesting v1 • In this page we will embed Token Claim function and ui/ux for old token buyers. • Holders will see their locked total token amount, installments 1.2.2.2. Vesting v2 • In this page we will embed Token Claim function and ...

    €2117 (Avg Bid)
    €2117 Keskimäär. tarjous
    101 tarjoukset

    Website React/ – UI – Mobile Responsive Compatible with Chrome, IE, Brave, Opera Web3 – Wallet Connect v2 – OKX Wallet – Binance Wallet ---- 1. Header 1.1. Enter Metaverse We will embed our WebGL game demo in this page. 1.2. Mainnet Events 1.2.1. Token Sale We will have token sales in this page. Should be Round #, Token Allocation, Price, Status, View under the Round Information. Should be Status (Live, Paused, Expired), Price, Buy Token with Max button, Buy Time, Lock Time 1.2.2. Vesting/Claim Portal 1.2.2.1. Vesting v1 • In this page we will embed Token Claim function and ui/ux for old token buyers. • Holders will see their locked total token amount, installments 1.2.2.2. Vesting v2 • In this page we will embed Token Claim function and ...

    €2022 (Avg Bid)
    €2022 Keskimäär. tarjous
    115 tarjoukset
    Tokenização usina solar 19 tuntia left
    VARMENNETTU

    Preciso de um desenvolvedor para tokenização, trabalho com construção de usinas solares, e gostaria de tokenizar essas usinas e todo o processo que engloba isso.

    €422 (Avg Bid)
    €422 Keskimäär. tarjous
    6 tarjoukset

    Project Description: We are seeking an experienced blockchain developer to implement a solution for a critical challenge within our blockchain application. Our platform operates on the Polygon network and provides each user with a wallet to manage their digital assets, specifically focusing on the deposit and transfer of USDT (Tether), a widely-used stablecoin. The Challenge: A significant hurdle we've encountered is facilitating seamless transactions for users who may not possess MATIC, the native token of the Polygon network required for paying transaction fees (gas fees). This issue can hinder user experience and accessibility, particularly for those new to the blockchain ecosystem or those who primarily deal in stablecoins like USDT. Objective: The primary goal of this project i...

    €219 (Avg Bid)
    €219 Keskimäär. tarjous
    19 tarjoukset
    Raydium Liquidity Manager Loppunut left
    VARMENNETTU

    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 Keskimäär. tarjous
    13 tarjoukset

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