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!

Từ 74,697 nhận xét, các khách hàng đã đánh giá Blockchain Developers 4.84 trên 5 sao.
Thuê Blockchain Developers

Bộ lọc

Tìm kiếm gần đây của tôi
Lọc theo:
Ngân sách
đến
đến
đến
Loại
Nhiều kỹ năng
Ngôn ngữ
    Tình trạng công việc
    84 công việc được tìm thấy, giá theo USD

    Se requiere: - Elección de la plataforma blockchain - Instalación del software blockchain - Configuración de los nodos - Conexión de los nodos - Configuración del consenso - Configuración de la seguridad - Configuración de la escalabilidad - Pruebas y optimización - Documentación y mantenimiento

    $433 (Avg Bid)
    $433 Giá đặt trung bình
    27 lượt đặt giá

    I'm looking for a seasoned blockchain expert, particularly one with considerable expertise with custom blockchain development.

    $544 (Avg Bid)
    $544 Giá đặt trung bình
    57 lượt đặt giá
    Custom Blockchain Development Specialist 2 ngày left
    ĐÃ XÁC THỰC

    As an individual beginning a new project, I'm seeking a skilled blockchain expert proficient in Solidity. Your role will encompass the development of a custom blockchain solution on the Ethereum platform. Skills and Experience: - Strong proficiency in Solidity programming - Comprehensive knowledge of how Ethereum works - Proven experience in custom blockchain development - Be able to offer expert blockchain consultation as needed - Previous experience with Ethereum is highly desirable By joining this project, you'll have the opportunity to work on an exciting new project while using latest technologies. Your expertise and advice will be invaluable in creating a secure and efficient system.

    $16 / hr (Avg Bid)
    $16 / hr Giá đặt trung bình
    45 lượt đặt giá

    I want to scrape the website for data and present it on my website. I want to show the marketcap and prices for 4 cryptocurrencies. I want them to update in real time and present in a bar chart as if they are competing against each other.

    $143 (Avg Bid)
    $143 Giá đặt trung bình
    113 lượt đặt giá

    EL bot debe poder operar en varios DEX usando flashloans como caracteristica pricipal, las oportunidades de las transacciones las debe buscar en los mempool de los contratos inteligentes de cada DEX. Tambien debe poder hacer frontrunning de las transsacciones The bot must can operate on many DEX using flashloans like principal function, the oportunities of transaction have to look for in the mempool of the Contratcs of the DEX. must can do frontrunning,and sandwich attack

    $149 (Avg Bid)
    $149 Giá đặt trung bình
    22 lượt đặt giá
    Need to build solana token 1 ngày left
    ĐÃ XÁC THỰC

    Token on solana Name : Make America Great Again Symbol: $Maga Supply : 1 billion Decimals : 9 Tax : 3% buy tax and 3% sell tax(3% to lp and 3% to marketing wallet) *Noone can hold more than 6.7%* (like a supply block) Marketing wallet : GQ5ZVUtoUeLvfAMmUxwMrSNnXacDYSwEZW2abJk2DKcW

    $419 (Avg Bid)
    $419 Giá đặt trung bình
    5 lượt đặt giá
    Dune Analytics Dashboard Development 1 ngày left
    ĐÃ XÁC THỰC

    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...

    $39 / hr (Avg Bid)
    $39 / hr Giá đặt trung bình
    28 lượt đặt giá
    Seeking Senior Blockchain Engineer 1 ngày left
    ĐÃ XÁC THỰC

    We are looking for a talented and experienced blockchain engineer to join our team and help us build the next generation of crypto trading tools. The project has been completed by 30%. So your main responsibility is to complete our crypto trading platform according to our requirements. - Responsibilities: o Develop and maintain our proprietary crypto trading platform. o Integrate with more crypto exchanges for data retrieval and order execution. o Enhance security and performance of the trading platform. o Collaborate with our team to define product features and roadmap. o Stay up-to-date with the latest developments in blockchain technology and crypto markets. - Requirements: o Bachelor's degree in Computer Science, Engineering, or a related field. o Proven experience i...

    $52 / hr (Avg Bid)
    $52 / hr Giá đặt trung bình
    38 lượt đặt giá
    Blockchain Expert for Security API Creation 1 ngày left
    ĐÃ XÁC THỰC

    I am in need of a skilled blockchain expert who can develop an efficient security API for me. Despite the specifics not being defined yet, I envisage that the APIs will need to offer robust security features. Thus, experience in scalable security infrastructure could be beneficial. Ideally, you will: * Be proficient in Solidity programming - it's crucial for this project. * Have a deep understanding and experience with API security. * Have the ability to design an API with robust security features. * Provide value from the experience to incorporate advanced features. If you possess these skills and have an innovative mindset, please make a bid. While not necessary, including past work, detailed project proposals or relevant experience that you have had could increase your chances o...

    $13 / hr (Avg Bid)
    $13 / hr Giá đặt trung bình
    22 lượt đặt giá
    Polygon Smart Contract Audit 1 ngày left
    ĐÃ XÁC THỰC

    We are looking for an expert in smart contracts, specifically those deployed on the Polygon blockchain. Your application should include past work that demonstrates your experience in this field.

    $531 (Avg Bid)
    $531 Giá đặt trung bình
    127 lượt đặt giá
    Need to complete project 1 ngày left
    ĐÃ XÁC THỰC

    I have a pre-sale project. Staking, pooling, and governance must be completed. It is not yet complete and has not been deployed to servers. If you have good experience, please check the project and let me know the budget and time to complete the project. Share the repository. And I would like to hear your advice to complete the project successfully. I want to finish it within 3 months. Requirements Technologies: Frontend, Blockchain, Web3, Backend, Database, Solidity, API Integration. thank you

    $23 / hr (Avg Bid)
    $23 / hr Giá đặt trung bình
    126 lượt đặt giá
    Escrow Crypto Payment Gateway Developer 1 ngày left
    ĐÃ XÁC THỰC

    I'm in need of a skilled full stack developer with experience in blockchain integration. The project involves creating a standalone escrow crypto payment gateway. Key Requirements: - Proficiency in Blockchain Integration: You should be adept at integrating blockchain technology into a payment gateway. - Experience with Multiple Cryptocurrencies: The payment gateway will support USDT Bep20, Matic, BNB, and SQD Token. You should have experience working with these and have a solid understanding of how to integrate them into the system. The ideal candidate should be well-versed in security protocols, have a good understanding of decentralized finance (DeFi), and have a proven track record of successful blockchain integration projects.

    $5382 (Avg Bid)
    $5382 Giá đặt trung bình
    53 lượt đặt giá

    I'm seeking a competent blockchain developer with strong experience in creating smart contracts on the Ethereum network, or what I refer to as the base network. The primary objective of this project is the automation of financial transactions. This smart contract should be proficient in not only automating these transactions but should also possess the ability to interact with other smart contracts for the seamless execution of transactions. Possessing a keen understanding of the technical aspects involved in swapping one type of token for another, and staking and unstaking tokens would be beneficial but it's not a requirement for this particular job. IDEAL SKILLS AND EXPERIENCE: - Extensive experience in developing smart contracts on the Ethereum network - Proficient in Soli...

    $168 (Avg Bid)
    $168 Giá đặt trung bình
    8 lượt đặt giá
    Deep Dive into Blockchain & Tokenization 1 ngày left
    ĐÃ XÁC THỰC

    I'm seeking to thoroughly understand the concept of blockchain, particularly smart contracts, tokenization of assets, and the blockchain ecosystem. I currently have intermediate knowledge, and am eager to elevate it further. To clarify my needs: - Proficiency in one-on-one teaching, ideally involving complex technical content. - Expertise in blockchain technology, with a specific emphasis on smart contracts, tokenization of assets, and the blockchain ecosystem. - Ability to communicate properly and comprehensively through video conference. - Patience and understanding, considering my intermediate level of understanding. Applicants need to exhibit a deep understanding of the content and present it in an easy-to-understand format. Impress me with your approach and we might continue wi...

    $370 (Avg Bid)
    $370 Giá đặt trung bình
    6 lượt đặt giá

    I'm looking for a Full Stack Developer experienced in blockchain technology and game development to create a web-based game utilizing Ethereum's blockchain, Node.JS, and wallet integration. The game should incorporate the following functionalities: The game now uses backend for the whole mechanism, but I want to make it more decentralized by using smart contract. As you can check on the game, it uses input wallet address and this kind of operation is not comfortable for users. So I want to integrate wallet connect feature on the game. Are you able to implement all of these features? It could be MetaMask, Coinbase, TrustWallet, Rainbow. Please check our current codebase. - Blockchain Technology: Implement blockchain technology to enhance user experience and security. - Node.JS: ...

    $37 / hr (Avg Bid)
    $37 / hr Giá đặt trung bình
    87 lượt đặt giá

    I'm seeking a blockchain expert with proficient knowledge and practical experience in Ethereum to build a Decentralized Application (DApp) with the aim of serving the voting industry. Key Responsibilities: - Develop, design and test the Ethereum DApp - Ensure the application is secure and user-friendly - Maintain and improve the application constantly - Deploy the DApp on Ethereum network Necessary Skills: - Extensive knowledge of Ethereum blockchain, as well as related tools and technologies - Experience in coding Smart Contracts - Proven experience in creating DApps, ideally in the voting or related sectors - Excellent problem-solving skills - Detail-oriented with strong analytical skills If you have a keen understanding of the challenges linked to blockchain deployment and a ...

    $227 (Avg Bid)
    $227 Giá đặt trung bình
    11 lượt đặt giá

    I'm looking for an experienced blockchain developer with expertise in Ethereum smart contract API development. Key API features: - Ability to scan various smart contract code - Honeypot detection - Malicious code detection Required skills: - Proficiency in Solidity and Python - Blockchain development experience, particularly with Ethereum - Demonstrated expertise in API integration - Familiarity with security issues specific to smart contracts If you're a detail-oriented blockchain expert with crowdfunding experience, I'd love to hear from you.

    $15 / hr (Avg Bid)
    $15 / hr Giá đặt trung bình
    31 lượt đặt giá
    Blockchain Expert NEEDED -- 6 1 ngày left
    ĐÃ XÁC THỰC

    I'm looking for a blockchain expert who can build custom blockchain using Cosmos SDK.

    $19 / hr (Avg Bid)
    $19 / hr Giá đặt trung bình
    50 lượt đặt giá
    Urgent Cosmos SDK Blockchain Project 1 ngày left
    ĐÃ XÁC THỰC

    I am urgently seeking an expert in Cosmos SDK to build a custom blockchain with particular functionalities. The primary goal being the implementation of a voting system, staking mechanism, and token issuance. Desired skills and experience include: - Proven expertise with Cosmos SDK - Experience building custom blockchains - Understanding of blockchain voting and staking mechanisms - Token issuance know-how Please note, the expected timeframe for this project is immediate. I am looking for professionals who can start working on the project right away and deliver high-quality results. Your promptness will be greatly appreciated.

    $767 (Avg Bid)
    $767 Giá đặt trung bình
    13 lượt đặt giá

    I'm in need of a highly skilled developer, with a deep understanding of Cosmos SDK to build a custom Blockchain for me. Specific Requirements: - First and foremost, the Blockchain must support smart contracts, this is the key functionality I require. - I have opted not to specifics on the type of smart contracts at this time, this can be further discussed during the project development phase. Project Timeline: - I need my project completed within a month, hence swift and efficient service is essential. Ideal Candidate: - An expert in Cosmos SDK. - Extensive experience in building custom Blockchain. - Understanding of smart contracts in Blockchain. - Good communication skills, be able to work within set timelines.

    $16 / hr (Avg Bid)
    $16 / hr Giá đặt trung bình
    14 lượt đặt giá

    I'm looking for a solana developer. Your task is to create custom spl token. I'll give you data about spl token in detail through chat. But only you have a experience in creating custom spl token, bid please.

    $538 (Avg Bid)
    $538 Giá đặt trung bình
    24 lượt đặt giá

    I am looking for someone who can upgrade walletconnect library to latest version. Just need to upgrade Library

    $35 (Avg Bid)
    $35 Giá đặt trung bình
    1 lượt đặt giá

    **Project Title:** Automated Crypto Arbitrage Bot with Flash Loan Integration and Desktop User Interface **Project Description:** I'm seeking a skilled blockchain developer with strong Python expertise to build a cutting-edge cryptocurrency arbitrage bot. This bot will leverage flash loans for automated profitable trades on major decentralized exchanges. **Core Functionality:** * **Real-time Monitoring:** The code must continuously monitor cryptocurrency prices across all major decentralized exchanges (DEXs). * **Arbitrage Detection:** The bot will use Python for data analysis to identify profitable arbitrage opportunities where a significant price difference (exceeding 0.09% + gas fees) exists for the same cryptocurrency across different DEXs. * **Flash Loan Integration:** The...

    $603 (Avg Bid)
    $603 Giá đặt trung bình
    95 lượt đặt giá
    Urgent Telegram Bot Development 1 ngày left
    ĐÃ XÁC THỰC

    I am urgently looking for an experienced Telegram bot developer to create a bot. we need a telegram bot that will pull market data on all tokens from alcor exchange. We need this quite quickly and will need a setup config section for other users to set up in there channel -as the admin i can add any token to it i want from Alcor exchange -The option to add it channels but admin controls to activate it for said channel -channel users able to use commands and add the tokens they want to display -pull data on command - user would type token from alcor and will pull live data

    $141 (Avg Bid)
    $141 Giá đặt trung bình
    89 lượt đặt giá
    Cartoonish 3js Metaverse Development -- 2 20 giờ left
    ĐÃ XÁC THỰC

    I'm looking for an experienced 3js developer who can create an engaging metaverse with a cartoonish art style. The metaverse should be interactive with customizable avatars and support real-time multiplayer gameplay. Features needed: - Interactive Environments: Users should be able to interact with the world and objects within it. - Customizable Avatars: Users should be able to customize their online persona in multiple ways. -Real-time Multiplayer: The metaverse needs to support multiple users interacting in real-time. Interaction: The primary mode of interaction should be through keyboard and mouse controls. A detailed understanding of user controls in a 3D environment is important. Skills and Experience: - Expertise in 3js for creating 3D environments - Experience with creating...

    $580 (Avg Bid)
    $580 Giá đặt trung bình
    29 lượt đặt giá

    I need a blockchain system that will primarily record key information about the citizenry of my new and unrecognized country. The system should be highly secure and allow for easy modification of its data structure and content. Requirements: - The system should primarily focus on recording citizenry information, including basic details such as full name, birth date, citizenship ID, other relevant IDs (including if they hold foreign citizenships), income, bank details, and employment information. - It should be built on a blockchain architecture that ensures the security and integrity of the data. - It should be highly modifiable, with the ability to add new fields for additional information, update existing citizen information, and modify the data structure as required. This ability ...

    $1798 (Avg Bid)
    $1798 Giá đặt trung bình
    27 lượt đặt giá

    I am the head of a new unrecognized country, and we're in need of a seasoned blockchain expert to develop a national cryptocurrency. This digital currency will be overseen by our Royal Bank and the federal reserve. Key Requirements: - Security Measures: The development of the cryptocurrency must prioritize robust security to ensure the protection of our financial transactions from hacking, money laundering, and other banking financial crimes. - Scalability: The cryptocurrency should be able to scale effectively as our nation's economy grows and transactions increase. - Transparency: The system should be transparent, promoting trust and accountability in our financial systems. Creation of accounts: The ability for citizens, businesses, government officials and agencies, and roya...

    $2911 (Avg Bid)
    $2911 Giá đặt trung bình
    29 lượt đặt giá

    I'm seeking a competent freelancer to develop a unique carbon trading website specifically for Renewable Energy Certificates (RECs). It needs to be user-friendly with easy registration and login, efficient REC trading facilities and integrated with a cryptocurrency wallet for our custom digital currency named "Gaga". The platform should be designed to accommodate three main user roles: 1. Trader 2. Investor 3. Administrator Each REC listed on the trading platform must display the following information: - The price of the REC - Quantity available - Seller's information Ideal candidates must possess expertise in web platform development, cryptocurrency wallet integration as well as a profound understanding of the carbon trading environment. Experience in projects r...

    $26 (Avg Bid)
    $26 Giá đặt trung bình
    2 lượt đặt giá

    I'm on the hunt for pre-built Web3 games. Further specifications of the game type were left open-ended, so any genre from collectibles, role-playing, to strategy games may be considered. Are you currently working on a Web3 Game? Did you already finish making a Web3 Game? Do you perhaps worked on a Web3 game before and own the rights? We are interested in 1. buying the code and rights 2. Or listing it on our platform This is a unique opportunity where you can sell your existing Web3 Gaming Project to us or list it on our platform. Write down the following: -Platform(s) of the game -Technologies you used to make the game -Concept and type of game (5-10 sentences) -Price estimate I'm NOT looking for someone to build a game from the start!!! You have to have an already working...

    $131 (Avg Bid)
    $131 Giá đặt trung bình
    30 lượt đặt giá

    I'm looking for a knowledgeable developer to create a bot capable of instant buying and selling Solana tokens on Raydium. You'll need to design a bot that executes trades fully automated, without any need for manual approval. Also it should be able to detect any new Pair that has been added and snipe the token in the moment it was added. Therefore you should be able to manually change the transaction fee. Key Features: - Seamless integration with Raydium. - Instant buy/sell execution the moment the liquidity pool gets created - Full automation of trades so the bot is able to spam transactions as long as i want and with given amounts that should vary while spaming transactions Ideal candidate should have: - Experience in programming trading bots - Excellent knowledge of Solana a...

    $89 (Avg Bid)
    $89 Giá đặt trung bình
    33 lượt đặt giá

    I'm seeking a cryptocurrency developer to create an ICO coin that will be listed on KuCoin. This cryptocurrency should be designed with its very own blockchain network for easy compatibility across different wallets and exchanges. Key Project Requirements: 1. **ICO Coin Development**: The programmer can determine the best language to develop the ICO coin with potential options being Solidity, Python, or JavaScript. 2. **Coin Functionality**: The coin should serve multipurpose functionalities, including: - Allowing users to make purchases - Generating profits for investors - Facilitating decentralized transactions 3. **Coin Staking**: The process of staking the ICO coin is envisioned to function via participation in a staking pool. Ideal Skills & Experien...

    $34065 (Avg Bid)
    $34065 Giá đặt trung bình
    101 lượt đặt giá
    Create Meme Coin Website -- 2 7 giờ left
    ĐÃ XÁC THỰC

    1. Homepage and Navigation Hero Section: Begin with a striking hero section that captures the essence of the meme coin. Include a captivating headline, a brief description of the coin, and a prominent "Buy Now" button that links to a tutorial on how to purchase the coin or directly to a decentralized exchange (DEX) where it's listed. Navigation Bar: The navigation bar should be simple and include links to the following sections: About, How to Buy, Roadmap, FAQ, and Contact. Ensure the navigation is sticky for easy access as users scroll. 2. About Section Story: Introduce the meme coin with a compelling story or the vision behind it. Highlight what sets it apart from other cryptocurrencies. Mission: Briefly outline the mission and the potential impact of th...

    $230 (Avg Bid)
    $230 Giá đặt trung bình
    28 lượt đặt giá

    I am seeking a proficient developer to create a multipurpose Cryptocurrency software that incorporates various functionalities. Key features needed include; - Exchange platform: A platform where users can easily exchange their cryptocurrencies with other clients, financial institutions, or businesses. - Swap Functionality: For smooth transition between different cryptocurrencies. - Central Bank Digital Currencies (CBDCs) Integration: The software should be capable of supporting CBDCs transactions. - Peer-to-Peer (P2P) Transactions: To support transactions among individual investors and cryptocurrency enthusiasts. - Crypto Trading Platform: For buying and selling of cryptocurrencies. - Wallet Creation with Quantum Key Distribution (QKD) Security: Wallets must have the high...

    $4552 (Avg Bid)
    $4552 Giá đặt trung bình
    27 lượt đặt giá

    I am seeking a highly experienced developer to create a quantum encrypted crypto wallet, cbdc exchange, and p2p transactions. The core feature of this wallet will be its ability to securely make transactions with cryptocurrencies. The wallet needs its functionality to be accessible both as an app and a website. The app should be compatible with both Android and iOS platforms, thus requiring proficiency in cross-platform app development. Key quantum encryption technologies for integration include: - Quantum Key Distribution (QKD): To ensure secure encryption keys are used. - Quantum Side-Channel Attacks Protection: To ensure robust defense mechanisms against potential quantum attacks. - Quantum Secure Direct Communication (QSDC): To allow direct transfer of cryptocurrency without...

    $4599 (Avg Bid)
    $4599 Giá đặt trung bình
    32 lượt đặt giá

    Các bài viết khuyên đọc dành cho bạn

    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