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!

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    25 份搜到的工作,货币单位为 HKD

    I need a developer who can get historical data of Ethereum token pair by using api with pairaddress

    $203 (Avg Bid)
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    11 个竞标
    Blockchain security needed 6 天 left
    已验证

    Project Title: Blockchain Security Implementation Overview: I am in need of high-level blockchain security services to ensure the safety and integrity of my blockchain system. I require expertise in transaction monitoring, smart contract auditing, and network penetration testing. Specific Requirements: - Transaction Monitoring: I need comprehensive monitoring of all transactions within the blockchain system to detect any suspicious or unauthorized activities. - Smart Contract Auditing: The selected professional should be able to thoroughly review and audit the smart contracts within the blockchain system to identify and fix any vulnerabilities or loopholes. - Network Penetration Testing: I require a skilled individual who can perform rigorous penetration testing to identify and address a...

    $195 / hr (Avg Bid)
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    45 个竞标

    Hi, I'm currently searching for a Dev who could help me complete my project. It's a Crypto Bot connected to the Ethereum Chain. Its logic is based on Front-Running, meaning it scans the blockchain for upcoming transactions, it finds a transaction, inputs a buy before the transaction and inputs a sell after, making a profit out of every transaction. Now, what I need is security features and implementations. As we know the Crypto Market has many scams that can be scanned by the bot. I have 2 solutions that might fix the last 10% of configuration. First, Implementing a whitelist of trusted tokens only. The Second one is implementing a script to test an upcoming transaction on GoErli Testnet chain, meaning it would test the transaction before actually doing it on the mainet chain.

    $976 (Avg Bid)
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    28 个竞标

    I need experience developer in the Astar network, Polkadot ecosystem, Substrate ecosystem and also ink! smart contract language

    $4483 (Avg Bid)
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    25 个竞标

    I wish to create NFT with fractional ownership of a piece of musical memorabilia then market it. Please send links to NFT projects successfully completed.

    $3718 (Avg Bid)
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    29 个竞标

    Требуется опытный Node.js разработчик (опыт 3–6 лет) для доработки и рефакторинга сервисов. Мы занимаемся разработкой проектов в области распределенных реестров (блокчейна) на базе DAG - ubix.network. Проекты в финтех, легалтех, интернете вещей с использованием собственной соцсети в качестве интерфейса. Требования: Опыт работы с Node.js от 3 лет. Опыт коммерческой разработки от 5 лет. Хорошее знание ООП. Готовность следовать стандартам разработки: Prettier/linter Опыт в TDD (или покрытие кода тестами постфактум), Mocha/Sinon. Знание протоколов TCP/IP. Инициативность Плюсом будет: Опыт в блокчейне/шифровании. Обязанности включают передовую работу над блокчейном, доработку, рефакторинг  Отбор в команду: 1. Изучение вашего репозитория. 2. Краткое собеседование (10-20 минут). 3...

    $148 / hr (Avg Bid)
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    13 个竞标

    Requirements Document for a VeChain-Based Traceability Application 1. Introduction 1.1 Application Objective: Develop a traceability application on the VeChainThor Blockchain to ensure transparency and security throughout the supply chain. 2. Key Features 2.1 Product Registration: Enable decentralized recording of product details, including origin, storage conditions, important dates, etc. 2.2 Bidirectional Traceability: Ensure the ability to track products from origin to final destination. 2.3 Authenticity Verification: Integrate verification mechanisms for consumers to confirm product authenticity. 3. VeChainThor Smart Contracts 3.1 Development: Create Solidity smart contracts to manage key application functionalities. 3.2 Integration: Ensure seamless integration of smart contracts wi...

    $141 / hr (Avg Bid)
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    52 个竞标

    I am looking for a visionary crypto developer to create a fun and innovative crypto coin. The ideal candidate should have experience in building crypto coins on blockchain platforms other than Ethereum or Bitcoin. Functionality: - The crypto coin will serve as a utility token for a specific platform. - It should have the ability to facilitate transactions within the platform and provide additional benefits or features. Timeline: - This project has a timeline of more than 3 months, allowing for thorough development and testing. Skills and Experience: - Strong understanding of crypto development and blockchain technology. - Experience in building utility tokens for specific platforms. - Knowledge of alternative blockchain platforms for building crypto coins. If you are a creative and fo...

    $11802 (Avg Bid)
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    I am looking for a freelancer to help me run a specific Github project for personal use. I have a specific project in mind that I would like to work on. I do not require any customizations or modifications to the project. Ideal Skills and Experience: - Proficient in Github - Familiarity with the specific project I have in mind - Ability to effectively manage and run a project on Github

    $141 (Avg Bid)
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    9 个竞标

    I will need the development of an arbitrage bot (smart contract) that will be able to use flash loans to make arbitrage trades between uniswap ,sushiswap, balancer and any other reliable DEX. The bot should be able to spot arbitrage opportunities and quickly execute flash loans from either Aave or Dydx to make trades with them. The flash loan amount (collateral) should be determined by the bot. The bot should be able to execute flash loan arbitrages with the right amount of gas fee in order not to be front run by another bot The bot should be able to repay the flash loan plus the gas fees and then send the profits into the wallet address of the owner . All this should be done automatically and simultaneously.

    $4913 (Avg Bid)
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    I have an existing multi-vendor eCommerce project () that needs a few upgrades. I would also like to bring the project closer to WEB3 standards. 1. New theme integration 2. Version updates for PHP and Laravel 3. Conflict Resolution Module 4. Delivery/Tracking 5. AI Assistance Integration 6. Blockchain Wallet Set-up (ERC 20 Token or similar), and ICO In summary, a multi-vendor e-commerce portal in a Web3 scenario would likely revolve around decentralisation, blockchain integration, user empowerment, enhanced security, and transparent, trustless transactions, offering a new level of autonomy and efficiency to users and vendors alike. I have a budget of $650 to $850 USD. Please bid within budget.

    $11029 (Avg Bid)
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    84 个竞标

    Title: Experienced Blockchain Developer Needed for Urgent Project We are seeking an expert blockchain developer who can assist us with a time-sensitive project. The ideal candidate should have extensive experience in blockchain development, specifically with the USDT platform. Specific Requirements: - Proficiency in USDT blockchain platform development - Strong understanding of blockchain technology and its applications - Ability to develop smart contracts and decentralized applications (dApps) - Experience in implementing security measures and addressing vulnerabilities in blockchain systems - Familiarity with integrating blockchain solutions into existing systems and platforms Deadline: Although there is no specific deadline for the project, we are looking for a developer who can com...

    $19340 (Avg Bid)
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    21 个竞标

    I need a freelancer to provide detailed instructions on how to set up a hyperledger fabric blockchain with a hyperledger firefly supernode. The detailed steps need to: 1. Create the network using Kaleido 2. Show how to deploy the relevant ERC20 contract chaincode from hyperledger fabric-samples. Including interfact and contract API. hyperledger/fabric-samples: Samples for Hyperledger Fabric () 3. Create three generic user accounts for trading that can buy and sell exchange tokens. 4. Create an admin account that can create new token pools and mint tokens. 5. Show how transaction history can be queried to then be displayed on a front end app 6. Show how current balances can be queried to then be displayed on a front end app 7. Show how market orders and market depth for a token pool ca...

    $1117 (Avg Bid)
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    public speaker 3 天 left
    已验证

    I am looking for a public speaker who can effectively persuade and motivate my audience. The ideal candidate will have experience in delivering speeches that inspire action and create positive change. Requirements: - Strong communication skills and the ability to engage and captivate an audience - Experience in persuasive speaking and motivating individuals or groups - Knowledge of effective speech delivery techniques, including body language and vocal projection - Ability to adapt content to the specific needs and interests of the audience Skills and Experience: - Previous experience as a public speaker, preferably in a similar industry or topic - Proven track record of delivering impactful speeches that have inspired action - Familiarity with the preferred format of keynote presentatio...

    $344 (Avg Bid)
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    2 个竞标

    I am looking for a developer who can create a blockchain fork of a coin, with the same functionality as the original coin but with our branding. Blockchain Technology: The original coin is using a blockchain technology that is not Ethereum or Bitcoin. Branding Elements: We need to incorporate our logo and color scheme into the website and wallet client. Additionally, we have specific messaging and slogans that need to be included. Modifications: We only require a few changes / new functionality and adjustments to the original coin fork and website Ideal skills and experience: - Strong understanding of blockchain technology and experience with blockchain forks - Proficiency in web development and familiarity with building and customizing websites - Graphic design skills to incorpora...

    $18270 (Avg Bid)
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    93 个竞标
    Music NFT site 3 天 left
    已验证

    Music NFT Site - Selling music NFTs with advanced interactivity and specific design ideas - We are looking for a skilled developer to create a music NFT site focused on selling music NFTs. - The main purpose of the site is to provide a platform for artists to sell their music as NFTs. - The site should have advanced interactivity, including live auctions and community features. - We have specific design ideas in mind for the site and would like the developer to incorporate them. - The ideal candidate should have experience in developing NFT platforms and be familiar with blockchain technology. - Strong coding skills in HTML, CSS, and JavaScript are required. - Knowledge of smart contracts and cryptocurrency integration is a plus. - The developer should be able to work closely with our tea...

    $4507 (Avg Bid)
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    90 个竞标
    CoinSniper Forking 2 天 left
    已验证

    Project Title: CoinSniper Forking I am looking for a skilled developer who can help me fork the Coin Promoting Application like Coinsniper. I have specific requirements for the modifications and features that I need in the forked App. Ideal Skills and Experience: - Strong knowledge and experience in dap/webapp development and forking - Proficiency in working with Binance Smart Chain. - Understanding of blockchain technology and smart contracts - Ability to implement custom modifications and features - Familiarity with security protocols and best practices in development The project should be completed within 3 months, so the ideal candidate should be able to work efficiently and meet deadlines.

    $273 / hr (Avg Bid)
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    36 个竞标

    I am looking for a skilled freelancer who can help me withdraw a large amount of bitcoin from my bitacco account. I have more than 5 BTC that I would like to withdraw and I have a specific wallet where I would like to deposit the funds. Skills and Experience: - Proficient in navigating and withdrawing funds from bitacco - Knowledgeable about the process of transferring bitcoin to a specific wallet - Experience with handling large amounts of bitcoin transactions - Familiarity with different bitcoin wallets and their compatibility with bitacco.

    $19652 (Avg Bid)
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    18 个竞标

    I am looking for a blockchain developer to work on my project. Specific blockchain platform: Own Features or functionalities needed: - Decentralized applications (DApps) UI/UX design: Not sure Ideal skills and experience: - Proficiency in blockchain development on the specified platform - Experience in creating and implementing decentralized applications - Knowledge of smart contracts and token creation - Familiarity with UI/UX design, if required

    $22659 (Avg Bid)
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    24 个竞标

    We are looking for a skilled developer with strong experience in Java, ReactJS, and Solidity to assist in the creation of a crypto wallet. The ideal candidate should have a thorough understanding of blockchain technology and be able to implement secure and efficient wallet functionalities. Responsibilities include designing and developing user-friendly interfaces, integrating blockchain APIs, and ensuring the wallet meets high security standards. Attention to detail, problem-solving skills, and the ability to work collaboratively are crucial for this project.

    $102 / hr (Avg Bid)
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    11 个竞标

    I am looking for a developer to create an admin panel for my crypto casino game website. i have the website ready and live. The ideal candidate should have experience in financial management and be able to handle a website with 10-20 games. Specific features required for the admin panel include: - Financial management capabilities - User management for admins - Game management - Blockchain and web3 If you have experience in developing admin panels for crypto casino game websites and possess the necessary skills, please reach out to discuss further details.

    $797 (Avg Bid)
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    9 个竞标

    I am looking for a crypto poster designer to create a medium-sized poster with a suggested theme or concept. The ideal candidate should have experience in creating eye-catching and visually appealing poster designs in the crypto industry. PLEASE SHARE ME YOUR PAST PROJECTS IN MESSAGE Skills and Experience: - Proficient in graphic design software (e.g. Adobe Photoshop, Illustrator) - Strong understanding of the crypto industry and its visual elements - Ability to create illustrations and graphics that effectively convey the message of the poster - Attention to detail and ability to meet deadlines Please provide a portfolio or samples of previous poster designs in the crypto industry.

    $172 (Avg Bid)
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    5 个竞标

    I am looking for a skilled web developer to create a website for my fourth-year college project. The purpose of the website is to provide information about a specific topic. Features: - Contact form: I would like the website to have a contact form where users can reach out to me with any inquiries or feedback. - Search bar: It would be great to have a search bar that allows users to easily find specific information on the website. - Photo gallery: I want to include a photo gallery to showcase relevant images related to the topic. Design and Theme: - While I don't have a specific design in mind, I have a rough idea of how I want the website to look. I would like it to have a clean and modern design, with a professional and academic feel. Ideal Skills and Experience: - Proficiency i...

    $148 (Avg Bid)
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    16 个竞标

    Need to create a ethereum contract more details in chat

    $484 (Avg Bid)
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    3 个竞标

    I am looking for a partnership with skilled developers who can handle the smart contract part of my token project. Here are the details: Blockchain Platform: The smart contract will be deployed on the Ethereum 、BSC platform etc. As long as it can realize the general functions of the token. But it requires the ability to compile the code with the latest version of the compiler. Deadline: There is no specific deadline for the completion of the smart contract. You and your team are responsible for the creation, deployment and safety of tokens. I will be responsible for project promotion, investment and financing, and the development and implementation of physical projects. To realize the actual memory value of the token. If you have the required skills and experience, and are interested ...

    $78 (Avg Bid)
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