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.

Von 21,046 Bewertungen, bewerten Kunden unsere Web3.Js Developers 4.81 von 5 Sternen.
Web3.Js Developers anheuern

Filter

Meine letzten Suchanfragen
Filtern nach:
Budget
bis
bis
bis
Typ
Fähigkeiten
Sprachen
    Jobstatus
    15 Gefundene Jobs, Preise in EUR

    I am in need of a proficient react native expo developer to build me a web3 mobile dapp with a unique wallet connection feature. This will primarily focus on sports betting. Ideal Skills: - Advanced understanding of web3, react native expo, and wallet connections. - Experience in creating or integrating betting systems for sports events. - Knowledge in building NFT marketplace and integrating smart contracts is a plus. - Proficiency in cryptocurrency payment options. Responsibilities: - Develop a web3 mobile dapp integrated with a wallet connection feature. - Implement a sports betting system within the dapp. - Enable cryptocurrency payment options for betting. I look forward to seeing your previous work in web3 mobile dapp development, specifically in betting systems. This could p...

    €534 (Avg Bid)
    €534 Gebot i.D.
    121 Angebote
    Complete current project 6 Tage left
    VERIFIZIERT

    Hello. I hope you are doing well. I want to complete my project. My previous developer was unable to continue working on the project and did not share all project information. I and he had an idea for a pre-sale, but I think it's about 80% complete. The idea of completing the project is open to experienced developers, and we hope to complete the project with someone who can both design and build it. I share current version. Please confirm it. If you are interested in my project, please do not hesitate to share your ideas or advice. ( Please check out the project and include in your proposal: total budget, time, schedule for completing one. ) Thanks Timothy

    €19 / hr (Avg Bid)
    €19 / hr Gebot i.D.
    84 Angebote

    I need a proficient Solidity and Web3 developer to help build a smart contract on the Ethereum network. The primary functionality of the contract is to facilitate fund transfers and sharing. Ideal Skills and Experience: - Solid experience in Ethereum smart contract development - Expertise in Solidity and libraries - Familiarity with test networks I need to create a smart contract and wallet connection using metamask. Here's an example; On this link, they only can donate using a credit card or debit card. I want to pay with eth test network (using metamask) and the smart-contract is; Person A needs 2000ETH for their project with a deadline of 30 days and share the profit 10% after 10 days of the project to reach the goal of each ETH donated by another person, Person B donat...

    €466 (Avg Bid)
    €466 Gebot i.D.
    30 Angebote

    We are seeking a skilled developer to create a versatile widget that integrates seamlessly with Web3 dashboards on the Neo Blockchain (). Dashboards are only in development. The goal would be to create a widget to be posted publicly to allow others to easily integrate the widget into their developing and/or exiting dashboard. This widget will be responsible for registering wallet addresses with Neo Name Service () usernames. The successful implementation must be compatible with multiple programming languages including JavaScript and Python. Experience with blockchain technology and familiarity with Neo N3/Neo Name Service is a bonus. Although familiarity with any frameworks was not specified, being agile and adaptable will be crucial in successfully delivering this project. Key Requirem...

    €182 (Avg Bid)
    €182 Gebot i.D.
    33 Angebote

    I'm representing a travel online agency, looking to expand our services into the web3 space through the Camino Network. We are in need of a skilled developer to assist us with the following services: - Smart Contracts Development: As we transition to the web3 environment, we need to establish secure payment transactions within our system. The ideal candidate would have experience in developing smart contracts for e-commerce, specifically within the travel industry. - System Development for Selling/Buying Travel Services: We are also looking for support in building a robust system for selling and buying travel services. This system should seamlessly integrate with the Camino Network, providing a user-friendly interface for both us and our potential partners. The successful freelance...

    €216 (Avg Bid)
    €216 Gebot i.D.
    19 Angebote
    NFT Marketplace Developer on EVM 5 Tage left
    VERIFIZIERT

    I need to have a wallet connection feature on existing NFT marketplace. Key Requirements: - You should have a good understanding of NFT marketplaces and blockchain technologies. - Proficiency in Ethereum blockchain development. - Prior experience(Most important) with Web3Auth and wallet connection - Ability to develop a clean and minimalist user interface for the NFT marketplace. Please get in touch if you have the skills and experience to deliver on this project.

    €193 (Avg Bid)
    €193 Gebot i.D.
    19 Angebote

    We are currently seeking a talented Web3, Smart Contract, Solidity developer to join our team. The ideal candidate will have experience developing on the EVM chain and a strong understanding of blockchain technology. Responsibilities: Design, develop, and test smart contracts on the EVM chain Implement and deploy decentralized applications using Web3 technologies Collaborate with team members to design and implement new features Keep up to date with the latest trends and developments in the blockchain space Requirements: Proficient in Solidity programming language Experience with and other blockchain development tools Familiarity with Ethereum and other EVM-based chains Strong problem-solving skills and attention to detail Excellent communication and teamwork skills If you are passion...

    €33 / hr (Avg Bid)
    €33 / hr Gebot i.D.
    49 Angebote

    I want sustem do 1-user connect wallet with useWallet 2-send 10 slt oken from the token address 3-money ended after confirm transaction with wallet to admin address use react and this versions "@solana/spl-token": "^0.2.0", "@solana/wallet-adapter-base": "^0.9.23", "@solana/wallet-adapter-react": "^0.15.35", "@solana/wallet-adapter-react-ui": "^0.9.35", "@solana/wallet-adapter-wallets": "^0.19.32", "@solana/": "^1.33.0", need this mall task today

    €38 (Avg Bid)
    €38 Gebot i.D.
    8 Angebote

    Need an online marketplace site where users can offer services or users can post services wanted. Users can contact gig owner before ordering but will have measures in place to avoid spam and to make sure they aren't trying to contact out of the site. Will need to place banner ads and have an option for responsiveness so the ads show in mobile devices as well or a second option for mobile ads. The buyer or winner of the gig will have a meeting with a specified maximum time as decided by the gig creator. The meeting will be online via video chat (which will need to be incorporated) or meet in person (location must be specified). All payments will be via crypto and admin getting a % of each order. Site will have a referral program which will be in the member panel with unique links...

    €335 (Avg Bid)
    €335 Gebot i.D.
    93 Angebote

    I currently have a working script using the 0x protocol. I frequently get out of gas error messages. I could have 50$ or 3$of ETH in my wallet when this happens so it is not a lack of funds. I believe this is an issue with the script not allocating enough gas. Here is an example of 2 of the TX that failed on Tenderly I need the following: 1. I need someone to fix the OUT of GAS ISSUE AND use the highest amount of GWEI so the TX is processed as fast as possible. 2. ON one of the last lines, the amount of GAS is output. I would like to out ut the TX fee in ETH if possible. PLEASE, I am looking for someone who is skilled in Blockchain This will be quick fix for that person and shouldnt cost alot..... Ideal Candidate Skills and Experience: - Significant expertise in blockc...

    €265 (Avg Bid)
    €265 Gebot i.D.
    9 Angebote

    As I venture into the cryptocurrency market, I am in need of a Node.js script that allows efficient Solana trades using the Jup V6 API. Key Requirements: - Build a Node.js script that can accurately execute market orders. - Indispensable ability to interact with the Jup V6 API specific to Solana token transactions. - Configure the script to be used with an existing wallet address of mine. Ideal freelancers for this project would have: - Strong proficiency in Node.js, ideally with prior experience in building scripts for cryptocurrency trades. - Familiarity with the Jup V6 API and its various functionalities, especially in relation to market orders. - Solid understanding of the Solana cryptocurrency token. By helping me to automate my Solana trading activities, you'...

    €355 (Avg Bid)
    €355 Gebot i.D.
    79 Angebote

    I'm in need of a skilled developer with specific expertise in blockchain and wallet integration. The project involves building an ICO presale website on the Polygon blockchain. All the necessary content and Figma designs are already prepared; your primary focus will be on integrating the presale contract and MetaMask wallet, as well as implementing a few key features in the contract. here is the design of the website Key Requirements: - Deploy a presale contract on the Polygon blockchain - Implementing a locking mechanism in the contract - Ensuring that tokens are sent only after the presale ends - Make sure only virtual balances are visible; actual tokens are not sent Ideal Skills: - Extensive experience in blockchain development - Proficient in working with the Polygon blockch...

    €570 (Avg Bid)
    €570 Gebot i.D.
    26 Angebote
    UI + Ethereum DeFi Web3 Developer Needed 20 Stunden left
    VERIFIZIERT

    I am in search of a skilled web3 developer to assist in the ongoing development of a decentralized finance (DeFi) project on the Ethereum blockchain. The project is currently in progress, and the ideal candidate will have a solid understanding and experience in Ethereum, EVM, and Dex technologies. The original developer has gone on a trip, and we're seeking someone to continue the project. So, we want to prioritize completing the graphs and tables on our platform till he arrives. It's just the UI aspect, but it's linked to Web3, so we're looking for a Web3 developer. Key skills and experiences that are preferred for the job include: - Proficiency in Ethereum and Solidity - Experience in developing DeFi projects - Familiarity with EVM and Dex - Understanding of th...

    €34 / hr (Avg Bid)
    €34 / hr Gebot i.D.
    41 Angebote

    I'm seeking an experienced developer to build a blockchain launchpad with web3 integration. This project's focus is more on functionality than aesthetics, and you will primarily need to integrate a smart contract into our existing frontend. The essential requirements for this project are as follows: - Ability to integrate smart contracts with a frontend application. - Proficiency in working with Base Sepolia Test Net. - Familiarity with web3 blockchain development. Though not necessary, any prior experience in building launchpads or similar projects would be a significant plus. This task requires in-depth knowledge of blockchain development, so I expect all interested freelancers to have a strong background in this space.

    €76 (Avg Bid)
    €76 Gebot i.D.
    48 Angebote

    We would like to create a Dune Dashboard for a token project, with the following data, which is all onchain. Keep in mind that the token is on four different chains: Ethereum, Solana, BNB, and BASE): -price -total market cap -total number of token holders -line chart of total number of token holders over time -number of holders on each chain (as pie chart) -total 24h volume -24h volume on each chain (as pie chart) -total 24h token revenue (this is simply 1% of total volume on Ethereum) -total amount of donations made by project (all onchain) -total number of NFTs owned by DAO (they are all in a single address) -Price of X at the market cap of Y for three tokens (this will show what the price of the token would be if it had the current market cap of three different tokens) Looking for som...

    €36 / hr (Avg Bid)
    €36 / hr Gebot i.D.
    28 Angebote

    Empfohlene Artikel nur für Sie

    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