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 23,629 reviews, clients rate our Web3.Js Developers 4.8 out of 5 stars.
Hire Web3.Js Developers

Filter

My recent searches
Filter by:
Budget
to
to
to
Type
Skills
Languages
    Job State
    11 jobs found, pricing in USD

    I am looking for a piece of software that will empty out my wallet of ERC-20 tokens & convert/swap them back to a specific contract address, E.g. ETH/USDT/DAI. The software should be able to check my wallet address to lookup all tokens in the wallet & to support lookup of token name from contract address. There are >101 tokens in a wallet so it should support unlimited tokens. Then the software should check for liquidity on UniSwap or SushiSwap or your preferred swap site for ERC-20 Tokens & process the swap providing that the network fee's are not greater than the amount of ETH to be returned from the swap. Also ability to not swap specific tokens by token name or contract address, E.g. do not swap USDT or DAI. The idea behind the software is to convert dust back t...

    $193 (Avg Bid)
    $193 Avg Bid
    28 bids

    We are working on a innovative project - Yootribe - A decentralized application (DApp) with two parts, a no-code NFT launch & builder, and an NFT wallet system, involves several key components and functionalities. - No-Code NFT Launch & Builder: 1. The no-code NFT launch and builder aspect of the DApp allows creators to tokenize their assets with NFTs without the need for extensive coding knowledge. This involves designing an intuitive user interface (UI) for creators and artists to easily upload their work, add metadata, and mint NFTs on the blockchain 2. The process also includes integrating wallets like MetaMask or Trust Wallet to enable users to engage with the DApp via their cryptocurrency wallets 3. Additionally, if the DApp includes a marketplace, it should...

    $34 / hr (Avg Bid)
    $34 / hr Avg Bid
    66 bids

    Job Description: Octal IT Solution LLP are seeking a talented and experienced Blockchain Developer (Web3) to join our team and take a leading role in initiating the development of our Game platform. As a Blockchain Developer, you will be responsible for designing, implementing, and maintaining the blockchain infrastructure and smart contracts that power our platform. You will work closely with our product and design teams to translate requirements into technical solutions and contribute to the overall architecture and development roadmap. Responsibilities: Design and develop the blockchain infrastructure and smart contracts for the Chess Game Platform. Collaborate with the product and design teams to understand requirements and translate them into technical specifications. Implement ...

    $31 / hr (Avg Bid)
    $31 / hr Avg Bid
    32 bids

    I'm looking for a skilled blockchain engineer with significant experience in developing ERC20 tokens and NFTs. The purpose of these tokens will be for a medium-complexity gaming project, particularly focusing on in-game economies. Key Responsibilities: - Develop an ERC20 token: You will be responsible for creating a custom token that aligns with the requirements of the gaming project. - NFT Development: You should have a deep understanding of NFTs and be able to create unique, non-fungible assets for the game. Job Specifics: - Purpose: The main intention of these tokens is to be used within a medium-complexity game. - Industry Focus: The tokens are focused on the gaming industry, specifically for in-game economies. Ideal Candidate: - Proficient in ERC20 token development and NFT cr...

    $2844 (Avg Bid)
    $2844 Avg Bid
    52 bids

    I'm in need of a skilled developer proficient in both Binance Smart Chain (BNB) and Ethereum, as the project involves creating a decentralized application on the Binance Smart Chain platform. Key Deliverables: - Develop a user-friendly decentralized application on the Binance Smart Chain platform - Implement necessary smart contracts for the application - Ensure seamless integration and functionality of the application Ideal Skills: - Proficient in Binance Smart Chain (BNB) and Ethereum - Hands-on experience in developing decentralized applications - Strong knowledge of smart contracts - Ability to ensure high-quality integration and functionality - Prior experience in developing for the Binance Smart Chain platform would be a plus Your expertise in BNB and Ethereum will be crucial...

    $35 / hr (Avg Bid)
    $35 / hr Avg Bid
    40 bids

    We are embarking on an ambitious project to develop a cutting-edge decentralized finance (DeFi) application using Node.js as the primary technology stack. Our goal is to create a platform that revolutionizes the way users engage with financial services by leveraging blockchain technology and smart contracts. The project presents an exciting opportunity to be at the forefront of the rapidly evolving DeFi space. Required Skills: Proficiency in Node.js development Experience with blockchain development, particularly Ethereum Familiarity with DeFi protocols and concepts Strong understanding of RESTful APIs Knowledge of security best practices in blockchain development Project Scope: The DeFi app will encompass various features and functionalities Timeline and Budget: Expected timeline for ...

    $37852 (Avg Bid)
    $37852 Avg Bid
    61 bids

    I am in need of a solidity developer who can incorporate a feature for swapping decimal numbers into an existing token. This task calls for: - An accomplished developer, versed in solidity. - The candidate ideally will have a background in actioning similar token system alterations. - I would appreciate reading about your previous relevant experiences in your application. If you have successfully manipulated token decimal numbers in the past, I would be especially interested in hearing about it. Your task will be to seamlessly add this functionality, making sure the existing token system is not disrupted. To reiterate, experience in similar projects will be a crucial factor in my decision-making process.

    $504 (Avg Bid)
    $504 Avg Bid
    51 bids

    We are looking to get a crypto casino game built, similar to Zkasino, Rollbit, Stake. If you are passionate about crypto, tech, and development, and want to build something that tens of thousands of people will use, then this opportunity is perfect for you! A fork of existing games is acceptable. The games will need to have a referral (affiliate) system in place for users to refer others and earn rewards from it. Games should accept funds from the top chains (ETH, BNB, BASE, MATIC, etc). Users will have their own wallet on the game which they will use the funds in to play the games. Scope will include frontend, backend and smart contracts required for a fully functioning game. Requirements: - Understanding of the crypto industry and how users operate. - Highly organized, professional...

    $37 / hr (Avg Bid)
    $37 / hr Avg Bid
    34 bids

    As an established blockchain company, we're currently in the market for a seasoned Ethereum blockchain specialist to join our team. This individual will primarily focus on DeFi, harnessing their expertise to further strengthen our offerings. Responsibilities: - DeFi Blockchain Development Skills & Experience: - Proven experience as a Senior Blockchain Engineer, particularly within Ethereum. - A strong understanding and experience in DeFi. - Developed smart contracts experience is a plus but not necessary. - Highly capable in designing sophisticated blockchain architecture. - Demonstrable experience implementing effective security measures. We look forward to receiving proposals from candidates with a robust understanding of Ethereum and a strong interest in developing for DeF...

    $2374 (Avg Bid)
    $2374 Avg Bid
    30 bids

    I need 8 avatars created (I will give 8 images of examples I need) and 8 different voices. The avatar will be from chest up and will be basically still and will be able to communicate with the user in real time back and forth like a real human conversation. This will be an adult niche ai chat bot so will need to be programmed accordingly. It should be a very simple but professional and responsive interface and easy to manage for me. Will have crypto membership payments and simple affiliate referral program. More work will be available ongoing.

    $839 (Avg Bid)
    $839 Avg Bid
    49 bids

    I'm looking for a skilled developer to work on a short project. The main focus will be to build frontend components and optimize the website's performance. Key Responsibilities: - Crafting robust, modular, and maintainable frontend components for an informational website. - Implementing performance optimizations to ensure the site loads quickly and operates efficiently. Ideal Candidate: - Proficient with and React, with a strong understanding of frontend development practices. - Experienced with performance monitoring and optimization techniques for web applications. - Familiar with minimalist design principles for a clean, simple, and user-friendly website interface. If you're a developer with a keen eye for frontend design and a knack for optimizing website per...

    $4 / hr (Avg Bid)
    $4 / hr Avg Bid
    42 bids

    Recommended Articles Just for You

    If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
    11 MIN READ
    Learn how to find and work with a top-rated Google Chrome Developer for your project today!
    15 MIN READ
    Learn how to find and work with a skilled Geolocation Developer for your project. Tips and tricks to ensure successful collaboration.
    15 MIN READ