Blockchain Jobs

Blockchain, is a technology that encompasses digital records or information, referred to as “blocks”, that are linked together securely and share the same network. This distributed ledger technology is the backbone of a new wave of innovation being implemented into our lives, with new disruptive applications and solutions seen in a growing number of industries. Clients may hire a Blockchain Developer to harness this power and build a secure digital platform tailored to their business needs.

A Blockchain Developer can create unique solutions leveraging blockchain technology to securely store, access, mine and distribute data in an efficient manner. They can leverage features such as blockchain tokens for payments, smart contracts for automated transactions, privacy layers and data protection techniques. Additionally, the expertise of a Blockchain Developer will ensure the project complies with industry standards, ensuring secure data and validation.

Here's some projects that our expert Blockchain Developer made real:

  • Creation of custom applications for fast and secure NFT (Non-Fungible Token) transactions
  • Developments of tools that allow synchronization with physical products using Bluetooth protocol
  • Integrations between wallets hosting cryptographic assets with ecommerce providers
  • The establishment of exploratory networks to provide insights into decentralized ecosystems
  • Developments to foster the growth of peer-to-peer energy trading networks

At Freelancer.com customers have posted amazing projects covering a variety of use cases related to blockchain utilising the Freelancer verified experts. With help from professionals on Freelancer.com customers can create unique projects addressing their business needs with safety, security and legality in mind. Rock your blockchain project today and hire an expert Blockchain Developer on Freelancer.com now!

From 64,887 reviews, clients rate our Blockchain Developers 4.83 out of 5 stars.
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    26 jobs found, pricing in USD

    I have a white paper in text and need to make gitbook docs. You need to have some knowledge in bitcoin and blockchain. If you are a right candidate, please add gitbook & bitcoin at the bottom of your proposal. Thanks

    $27 (Avg Bid)
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    JUMBOMEMECOIN 6 days left

    Welcome to JUMBOMEMECOIN! Our innovative cryptocurrency project is now seeking experienced help in developing a platform built on Binance Smart Chain. We are looking for talented individuals who can bring our vision of a smart contract development to life. JUMBOMEMECOIN will be an investment-based platform, built with the ability to provide users with a secure and reliable way to store and access digital assets. The platform will be powered by Binance Smart Chain, offering cutting-edge technology to our users. We require the development of secure and efficient smart contracts, as these will be the backbone of our platform. It is essential that our clients experience maximum security, transparency and trustworthiness when interacting with our smart contracts and thereby utilizing our of...

    $278 (Avg Bid)
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    8 bids

    I currently have two smart contracts, both designed to perform the same function, that I need deployed on both the Ethereum and Binance Smart Chain blockchains. The foundational code for these contracts is already prepared, but they require some modifications. Given the nature of the changes, this task shouldn't be a massive undertaking and is expected to be completed within a day. Upon agreement to take on this job, I will provide the contract 0x addresses. Please ensure to review and check for correct language and terminology in the contracts

    $17 / hr (Avg Bid)
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    21 bids

    I want to invest about £200,000 in cryptocurrency and I want to hire someone to manage my assets.

    $1387 (Avg Bid)
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    7 bids
    ANSWER QUESTIONS 4 days left

    Need 3 developers Interactive Knowledge Game is looking cryptocurrency engineer who can collaborate coin price prediction project. We our open source can be found at Requirements: Make it possible to add custom coin to this project by inserting new coin address. Answer the followings to be selected 1. Run the project and tell me which exchange platform this repo support. 2. To predict whether each coin price will be increased or decreased, how can you solve this task.

    $31 / hr (Avg Bid)
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    NFT developer 4 days left

    IKGame team is looking for a NFT expert. We have an NFT project and website and smart contract for NFT minting is already done. But the previous developer is on his vacation, so I need to find a talented developer for updates. All I want from you is , we want you to create a smart contract for staking of the NFTs and update website for staking feature. Here is the full source of current version. Hope you start work from this version and update it. So if you are interested, and talented, check this project and let me know your quote to add staking feature to website and smart contract. Hope to meet a developer, No agency. Thanks.

    $538 (Avg Bid)
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    27 bids

    my site is i have included main files for you to explore in attachments it is a wordpress theme that connects to a server folder on my dedicated server. you may sign up for the site, but no i wont give you admin access until you accept job, because the server actually creates private and public keys and holds current user information.. it is a wcfm marketplace able to host these 5 wallets, users needed to be able to send currency internally amongst each other as well as send send to external wallets/exchanges 1) the server is programmed for shib inu, apecoin, bitcoin, xrp, ethereum... i need you to be able to make sure its coded currectly in the server for receive, transfer, balance, etc 2) on the wordpress side, its already 80% coded for internal transfer (user to userr) and exter...

    $1285 (Avg Bid)
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    Need 3 developers Interactive Knowledge Game is looking cryptocurrency engineer who can collaborate coin price prediction project. We our open source can be found at Requirements: Make it possible to add custom coin to this project by inserting new coin address. Answer the followings to be selected 1. Run the project and tell me which exchange platform this repo support. 2. To predict whether each coin price will be increased or decreased, how can you solve this task.

    $38 / hr (Avg Bid)
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    12 bids

    I am seeking a freelancer who can integrate blockchain technology into both my document management system and property management. The ideal candidate should have experience in working with Hyperledger, as this is my preferred blockchain platform. The project requires the following features and functionalities: - Identity management - Smart contracts - Tokenization The successful candidate should be able to deliver a seamless integration of blockchain technology into my existing systems, ensuring the security and accuracy of all data. Strong communication skills and attention to detail are also essential.

    $14 / hr (Avg Bid)
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    blockchain 3 days left
    VERIFIED

    I am in need of a blockchain developer to assist me with the development of a blockchain project for Supply Chain Management. The ideal candidate should have expertise in Solidity programming language and experience in blockchain development. Specifically, I require assistance with the development of the blockchain project. Therefore, the ideal candidate should have a strong background in blockchain development and be proficient in Solidity programming language. The intended use case for the blockchain project is for Supply Chain Management. Therefore, the ideal candidate should have prior experience in developing blockchain solutions for Supply Chain Management. In summary, the ideal candidate should have the following skills and experience: - Proficiency in Solidity programming lan...

    $373 (Avg Bid)
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    Are you an experienced Python developer looking for a challenging and rewarding project? I'm looking to hire someone with the right skill set to help me create a project using Python. The project’s purpose is web development, so you must have knowledge and expertise in this area. The desired timeline for the project is 2-4 weeks, so you need to be able to commit to this timeframe. I am open to recommendations as to which frameworks or libraries to use, so if you have specific suggestions please let me know. But I am ultimately flexible on this and open to what you think might work best given the project details. If this project interests you, please get in touch. I am confident you will find this project an exciting opportunity to utilize your Python knowledge to develop some...

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    I am looking for a skilled developer to create a PWA reward earning app/site with cryptocurrency token payment. The ideal candidate should have experience in developing PWA apps and integrating cryptocurrency payment systems. Cryptocurrency: The payment system should support the use of "Other" cryptocurrencies, as specified by the client. A bep20 token will be used. But site should be able to send and receive usdt too. Swap between usdt and BNB and bep20 token. Rewards: Users will earn rewards by completing surveys, watching ads, playing games, visiting websites and watching videos. The app/site should be designed to make it easy for users to navigate and complete the surveys. Users can also pay of advertising and others with bep20 token on the app. Target Audience: anyone a...

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    hi good day, I need to work on project healthcare with blockchain then I need to write an algorithm for it, and a special tool for simulate and compare with some other system (project) depend on same parameters like(speed, delay time, price, power , scalability, throughput) can u do it please?

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    Join our groundbreaking project and be part of the future of subscription-based businesses! We are seeking a talented and passionate developer to help us build an innovative subscription swap platform that will disrupt the industry. With cutting-edge technologies like blockchain, smart contracts, and tokens, we are introducing a game-changing concept that allows users to seamlessly and securely exchange access to their subscriptions. Strong experience in blockchain development and integration, with expertise in platforms such as Ethereum or Hyperledger. Proficiency in smart contract development and deployment using Solidity or similar programming languages. Familiarity with tokenization and experience in building token-based systems. In-depth understanding of cryptographic techniques and ...

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    Liquity Arbtrage Bot 2 days left
    VERIFIED

    # Liquity Arbitrage This project will perform an arbitrage of LUSD/ETH pair. This will be done by 2 steps 1. Swap ETH for LUSD at uniswap 2. Redeem LUSD for ETH at liquity # Design The project has two main components , one is the node server and another is the smart contract. The node server is responsible for keeping a track of the prices of ETH at chainlink and at uniswap. When we notice a price difference where there is a possiblity of a profit from arbitrage it will trigger the smart contract to perform the arbitrage between uniswap and liquity smart contracts. ### How is the amount of eth to be used for the arbitrage calculated ? We have three restrictions in determining the ETH that can be used for the arbitrage. 1) The ETH present in the arbitragers wallet 2) The redeemable...

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    Looking for a blockchain expert to launch an Ethereum platform. We need a complete project launch and are open to consultation. Our desired timeline for project completion is more than 4 weeks. The ideal candidate should have experience with Ethereum and blockchain technology, as well as a strong understanding of smart contracts and decentralized applications. Knowledge of security protocols and experience with launching blockchain platforms is also preferred.

    $6 / hr (Avg Bid)
    Local
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    Music Site + NFT 1 day left
    VERIFIED

    I am looking for a freelancer to help me create a music site and NFT marketplace with the main goal of selling music and NFTs. I have no preference for a specific platform or technology, so I am open to suggestions. The ideal freelancer should have experience in creating digital marketplaces and integrating payment systems. The music site and NFT marketplace should include artist profiles and social features to help promote artists and their music to potential buyers. We want a site like (). Additionally, it should have advanced search and filtering capabilities to help buyers find the music and NFTs they are looking for. Customizable NFT designs and templates would also be a plus. Overall, my goal is to create a unique and engaging digital music experience that allows artists to sel...

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    I am looking for someone to deploy a HUFF contract to ETH mainnet. I have already created the contract and it has been tested and audited. However, I need full assistance with deployment. You probably need to use something like Foundry Huff and Huff deployer. Ideal skills and experience: - Experience with deploying contracts to ETH mainnet - Knowledge of HUFF contracts - Strong understanding of smart contracts and blockchain technology - Attention to detail and ability to troubleshoot issues during deployment - Foundry Huff y Huff Deployer Please provide examples of previous successful contract deployments and any relevant certifications or qualifications.

    $176 (Avg Bid)
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    Ethereum Sandwich Bot 1 day left
    VERIFIED

    I would like to create a front-running sandwich bot based on Ethereum Block Chain with different contracts address that can be entered (Metamask, eth network). (Uniswap v2&v3) The BOT would essentially: - Scan the blockchain and find transactions based on certain criteria (pending on the block aka mempool). - Front-run (specific trade volumes, slippage and gas price) transactions by placing a buy order on the same block at the same time by setting a higher gas price automatically. - and buy up only to the maximum value (I set it manually (ETH)) that I have decided to trade and when only has x % (I set it manually) profit by calculating through the pending transaction amount(impact that it has his/her investment) & gas fees selected automatically & slippage (buy&...

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    Develop a Betting platform 1 day left
    VERIFIED

    i want to develop betting platform with web3 services.

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    Register a Solana Domain 23 hours left
    VERIFIED

    We need to register a .SOL domains using an api. You will implements only two operations: a) Register .SOL DOMAIN: Boolean result = registerSOLDomain(String domain_sol, String phantom_Wallet_private_key). result = true if the domain was registered or false if not (show error). b) Transfer .SOL Domain from a wallet to another wallet: Boolean result = transferSOLDomain(String domain_sol, String phantom_Wallet_source_private_key, String phantomWalletDestinatiob). result = true if the domain was registered or false if not (show error). To implement this project only free resources can be used .That is, we will not use features like quicknode, infura etc. It is all. We already know which domains we want to register and we know which domains are available.

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    Homeless Crypto Project 21 hours left
    VERIFIED

    Need to create website that can accept both fiat and crypto payments for NFTs that will be used to raise money for homeless military veterans. The website needs to be Web3 capable and preferrably utilize a blockchain with low gas fees like Polygon or Binance. Users would need to be able to connect their crypto wallets (i.e. Trust Wallet, Metamask, etc.) to the website to purchase the NFT representing the homeless veteran being sponsored. Admin portal needs to be created in order to manage transacations and overall site. I have a mock design for the NFT, but would be opened to a 3D version of the NFT to be created as part of this project. Would also need a token created called the HERO token that will be used as a reward for those who buy a NFT that would be placed in a crypto/staking ...

    $8593 (Avg Bid)
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    Flashing blockchain transaction 18 hours left
    VERIFIED

    I am looking for a skilled freelancer to assist me with a personal project involving flashing blockchain transactions. The ideal candidate should have experience in working with blockchain technology and be able to provide past work examples showcasing their skills. The project needs to be completed ASAP, so prompt delivery is essential. Please contact for more details, the payment term would be one time

    $275 (Avg Bid)
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    wallet for cryptocurrency 16 hours left
    VERIFIED

    "Creating a Wallet for Bitcoin Fork" I am looking for a blockchain developer to help fork a wallet for Bitcoin Fork crypto. The wallet will be used for personal use. I am looking for the following: - Support for Bitcoin Fork - Advanced security features such as biometric authentication and multisig - User-friendly interface - Ability to send and receive cryptocurrency easily Ideal Skills and Experience: - Experience in developing cryptocurrency wallets - Knowledge of native cryptocurrency - Proficiency in security measures and encryption - Strong coding skills in languages such as Python, Java, or C++

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    trabajos freelance Requerimientos: Tenemos: .Parámetros (Códigos) .Plan de Negoció .Hoja de Ruta .Viabilidad . Economía Sustentable, Autónoma y Automática .Regulaciones DAO, Criptomonedas y NFT .Branding y Marketing Buscamos: .Programador .Diseñar y Ejecutar Smart Contract .Prueba del Smart Contract en la Testnet .Diseño y Conexión de una Web para conectar al Smart Contract Gracias. Saludos Cordiale

    $655 (Avg Bid)
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    Tenemos: .Parámetros (Códigos) .Plan de Negoció .Hoja de Ruta .Viabilidad . Economía Sustentable, Autónoma y Automática .Regulaciones DAO, Criptomonedas y NFT .Branding y Marketing Buscamos: .Programador .Diseñar y Ejecutar Smart Contract .Prueba del Smart Contract en la Testnet .Diseño y Conexión de una Web para conectar al Smart Contract Gracias. Saludos Cordiales. Rafael

    $698 (Avg Bid)
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    24 bids

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