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 28,152, os clientes avaliam nosso Web3.Js Developers 4.82 de 5 estrelas.
Contratar Web3.Js Developers

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 28,152, os clientes avaliam nosso Web3.Js Developers 4.82 de 5 estrelas.
Contratar Web3.Js Developers

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    5 trabalhos encontrados

    要求会中文 我目前维护一套与区块链钱包深度集成的 H5 / Web 应用,在安卓 Chrome、Telegram(移动端与 PC 端)及任务模块出现了多处异常。为了不影响用户留存,我想先把下面几个关键 Bug 彻底解决,代码托管在 Gitee 主要问题 1、安卓手机 谷歌浏览器 所有钱包都连不上 2、同一个钱包地址,手机、浏览器登录是熊, TG 移动端和PC端登录是蛋 3、tg PC端, 点高级签到,就一直转圈圈,没有扫码的出来 4、任务区域连接钱包跳过了弹窗 5、连接钱包后宠物任务可以直接完成 6、关注和每日礼物涉及调取推特 会黑屏 交付要求 1. 找出每个现象的根因,并提交修复后的可测代码(含简要注释)。 2. 在 移动端与桌面端全部验证通过。 3. 提交 PR 后附带复现步骤与修复说明,确保后续版本可回归测试。 4. 不破坏现有钱包签名、安全校验及后台统计逻辑。 验收标准 • 连接各主流钱包时 3 秒内成功完成 handshake,无白屏、无卡顿。 • 同一钱包地址的宠物状态在任何终端保持一致。 • Telegram “高级签到”弹出二维码后可继续完成后续链上签名。 • 任务中心所有弹窗状态机按既定流程运行,无跳步、无误判。 • Twitter 授权 H5 不再黑屏,回调数据可正常写入后端。 如果你熟悉 、EIP-1193 事件、MetaMask Mobile 及 Telegram WebApp SDK,并乐于逐步排查多端兼容性问题,就请在提案中概述你的思路与预计用时。我会提供现网测试账号、日志与远程调试权限,期待与你合作!

    $190 Average bid
    $190 Média
    17 ofertas

    I need a self-contained module that lets my web application talk to a TRC20 wallet through a direct Binance connection. Once wired up, the user must be able to: • Send and receive TRC20 tokens • View a complete, paginated transaction history • Check their live account balance in real time The front end is currently React, with a Node back end, but I’m happy for you to bring your own stack as long as it uses stable libraries such as TronWeb, or the official Binance API and keeps private keys on the client side. Your code should be clean, well-commented and easy for another developer to drop into a Git repo, run `npm install`, and be up and running with minimal configuration. Please include any environment variables or API keys that need to be set, and a br...

    $272 Average bid
    $272 Média
    20 ofertas

    Hi, I’m looking for a freelancer to help me build a Solana SPL meme coin launcher. I don’t have coding experience and only limited experience in web development and crypto, so I’m seeking guidance on feasibility, complexity, and cost, as well as development itself. Project Overview:
 The goal is to create a clean, user-friendly website where users can easily create their own memecoins. Key features I envision include: * Wallet connection (users can connect Solana wallets like Phantom or Solflare) * Token creation with a simple interface * Optional liquidity management (add/remove liquidity) * Token burning * Other standard token functions I was inspired by platforms like and , but I want to closely follow the simplicity/design and core features of Orion Tools. Reve...

    $2230 Average bid
    $2230 Média
    150 ofertas

    我已经构建了一个Telegram mini app,需要 Web3 钱包解决方案,需要在 iOS、Android、Web 以及 同步实现以下核心功能: 1. WalletConnect 集成 • 支持主流 EVM 链(Ethereum、BSC、Polygon 等) • 自动识别并连接用户现有钱包(MetaMask、okx、binance、abpay等) 2. Mint 功能 • 根据前端表单参数调用合约,完成 ERC-20 / ERC-721 铸造 • 铸造成功后即时回调并更新前端状态 3. 资产转账 • 单笔与批量转账界面 • 手续费预估与确认弹窗 • 转账结果监听与提示 4. 多端 UI/UX 一致性 • 移动端使用 React Native 或 Flutter 均可 • Web 端采用 React + • Telegram mini app 保持相同交互逻辑

    $556 Average bid
    $556 Média
    16 ofertas

    我正在构建一个H5,给这个H5集成一套跨平台的 Web3 钱包解决方案,需要在 iOS、Android、Web 以及 Telegram mini app 四端同步实现以下核心功能: 1. WalletConnect 集成 • 支持主流 EVM 链(Ethereum、BSC、Polygon 等) • 自动识别并连接用户现有钱包(MetaMask、okx、binance、abpay等) 2. Mint 功能 • 根据前端表单参数调用合约,完成 ERC-20 / ERC-721 铸造 • 铸造成功后即时回调并更新前端状态 3. 资产转账 • 单笔与批量转账界面 • 手续费预估与确认弹窗 • 转账结果监听与提示 4. 多端 UI/UX 一致性 • 移动端使用 React Native 或 Flutter 均可 • Web 端采用 React + • Telegram mini app 保持相同交互逻辑

    $487 Average bid
    $487 Média
    16 ofertas

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