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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    29 jobs found, pricing in USD

    We want to develop an AI based smart contract auditing platform where users of the platform will connect their wallet and enter the Token / Coin address for auditing. All the audited Tokens / Coins data will be stored in the Database for future showcase, so users searching for same Token/Coin will be available readily. Suggested Techstack : Backend : NodeJS Front-end : ReactJS Database : MongoDB Reference link :

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    I'm looking for a skilled developer or a team of developers to bring my project to life. We're creating a new crypto coin 'LXB'. I want our coin to be fast and scalable, and place a high emphasis on security and privacy. Key requirements: Crypto Coin Generator: - Fast and scalable performance - Secure and private transactions - Limited to 352 Millions - Mineable through our the app's game - Exchange LXB for other coins Website & App: - Must include wallet integration for easy storing and trading of LXB - Buying and selling functionality to provide real-time transactions Mining Game: - The game type is yet to be decided. However, it should encourage users to mine LXB coins. We will work closely to decide the best mining game concept suitable for this projec...

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    Create a very simple script that listens for tweets from a specific user. When the user posts a tweet containing a contract address of a cryptocurrency token, the script will extract the contract address and use the Jupiter platform to buy that token with Solana (SOL). * I do have the basic script made, just would need a few tweaking/bug

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    We are looking for a highly skilled Blockchain PPC Expert to join our dynamic marketing team. The ideal candidate will have extensive experience in pay-per-click (PPC) advertising, specifically within the blockchain and cryptocurrency sector. You will be responsible for developing and executing PPC campaigns to generate high-quality leads, increase brand awareness, and drive conversions. Key Responsibilities: Develop, implement, and manage PPC campaigns across various platforms (Google Ads, Bing Ads, social media, etc.) tailored to the blockchain industry. Conduct thorough keyword research and selection for blockchain-related topics. Create compelling ad copy and optimize landing pages to maximize conversion rates. Monitor and analyze campaign performance data to identify trends, insight...

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    I require a skilled developer to create a Python-based( or any other language) crypto gateway server application. The primary function of this application will be to convert M0 funds on the ledger to USDT on a global server. Ideal Skills and Experience: - Proficiency in Python programming - Prior experience in developing crypto gateway server applications - Strong understanding of the process of converting funds from the ledger to USDT - Deep knowledge of transaction encryption and its implementation - Familiarity with integrating various security features into the application If you have the expertise in Python programming (or any relevant language) , experience in the crypto realm, banking transfers, and a solid background in security features for applications, I'd love to hear f...

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    I'm looking for skilled smart contract developers with expertise in Solidity and deep understanding of the Polkadot blockchain platform. Key Tasks: - Develop a smart contract that can execute arbitrage transactions using flash loans on Polkadot. - The contract needs to be designed to interact efficiently with the Chainlink external data feeds. Expertise Required: - Prolific in Solidity programming language. - Experience working with the Polkadot network and its functionalities. - Familiarity with Chainlink API interaction. - Proven experience in creating effective smart contracts for arbitrage purposes is highly desirable. Your task will be considered successful when the smart contract can carry out flash loan arbitrage transactions effortlessly and profitably on the Polkadot ne...

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    I'm looking for a talented developer who can help me with a specific task in the blockchain backend. Your primary task will be developing our custom blockchain infrastructure. Here are a few key details for the project: Specific Task: - Developing blockchain infrastructure Requirements: - Expertise in blockchain development - Proficiency in developing custom blockchain infrastructures Ideal Experience: - Previous projects involving custom blockchain infrastructure development - Experience with implementing custom consensus mechanisms This is a great opportunity for a skilled blockchain developer to work on a unique project. If you have the required skills and experience, I'd love to hear from you.

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    I'm seeking a skilled Android app developer to create a comprehensive B2B e-commerce app for medicines. This app will cater to a wide range of products, specifically more than 500 different types of medicines. Main Features: - Product Catalog: As the app will be hosting a large variety of medicines, it is essential to have a well-organized and user-friendly product catalog. - Inventory Management: The app should have a robust inventory management system to keep track of the quantities of each product available. - Order Tracking: An intuitive feature to allow users to track their orders effectively. User Access Control: - The app will need an advanced level of user access control. - This includes customizable access for different business partners. - The system needs to be able to...

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    I'm in need of a React developer with experience in blockchain technologies. This project will involve integrating Ethereum blockchain into the React application. Key Requirements: - Experience with React JS - Proficiency in blockchain technology - Ability to interact with other blockchain services - Understanding of decentralized applications (dApps) The main focus is on the integration with Ethereum blockchain and other related services. Your expertise in this field would be highly appreciated.

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    I have invested in the "DOGE on Solana" token on the Raydium DEX, which is built on the Solana blockchain. Unfortunately, I am unable to sell the token as there is a message indicating that the developer has frozen my account, alleging that the token is a Honeypot(scam). I am looking for a skilled Blockchain Developer to assist me in recovering my funds. Key Tasks: - Analyze the situation: The first step will be to analyze the status of the token as well as the message that is displayed when I try to sell it. - Develop a Strategy: Based on the analysis, I will need a detailed strategy on how we can recover the funds that I have invested in the DOGE token. - Implement the Strategy: The final step will be to actively implement the strategy and recover the locked funds. Ideal Skil...

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    I am looking for a full stack developer who can create a Mini App on TON Blockchain, integrated with Telegram. The mini-app will be a gambling game like rolling dice Key Requirements: - Expertise in developing applications on TON Blockchain - Experience with Telegram integration - Ability to propose and implement creative ideas Please only apply if you have done any projects on the TON network and please also include your previous project in your description for reference

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    Description: We are looking to hire skilled freelancers for various roles in an upcoming cryptocurrency project. Please read the following job descriptions carefully: Web Designer: We need a talented web designer experienced in creating visually appealing and functional websites. Your role will involve designing and possibly implementing web pages tailored to our cryptocurrency project's needs. Graphic Designer: We are seeking a creative graphic designer proficient in creating engaging visuals and graphics. Your responsibilities will include designing logos, promotional materials, and other graphic content related to our cryptocurrency. Video Editor: We are in search of a skilled video editor who can create and edit professional-quality videos. Experience in editing promotional vid...

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    I am seeking a skilled developer to assist in building a DeFi project on the Ton ecosystem. The project is the lending protocol. requirements: 1. Need to have previous experience in building the project on the Ton ecosystem 2. Can work full time

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    We are seeking a highly skilled and motivated Python Developer to create a robust crash reporting service for our established product in the field of decentralized AI training workloads. This industry is burgeoning, valued at billions, offering vast opportunities for growth and innovation. Requirements: - Strong Python Skills: Proficient in Python with experience in debugging and error handling. Familiarity with Python-specific debugging tools is essential. - Crash Reporting Expertise: Experience in error and crash reporting is required. Knowledge of tools like Sentry or Raygun is a plus. - Automated Testing: Experience in automated testing to help prevent and quickly identify issues. - Blockchain Interest: While not required, interest in blockchain technology is beneficial, with potentia...

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    I'm seeking a developer experienced in building decentralized exchanges, particularly on the Solana blockchain, to help me create a cryptocurrency exchange with the following features and requirements: Key Features: - I'm looking for a decentralized exchange that allows users to buy and sell only, without the additional complexity of features like yield farming or NFT trading support. - The exchange should support liquidity pools, ensuring that users can easily and securely trade Solana (SOL) on the platform. Specific Cryptocurrencies: - The exchange should be focused on enabling the buying and selling of Solana (SOL) specifically. Ideal Skills and Experience: - Prior experience in building decentralized exchanges on Solana is a must. Please provide examples of your previous...

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    I'm looking for a skilled developer to create a Solana-based "Sandwich-bot" that can take orders, track them, and process payments in cryptocurrency. This is not an easy task because solana does not have a mempool unlike erc. I am finding a talented developer to create a successful sandwich bot at Solana. Ideal Skills: - Proficiency in Solana blockchain development. - Prior experience in creating chatbots or automated ordering systems. - Strong understanding of cryptocurrency payment processing. This project has no strict deadline, but I'm looking for a timely delivery without compromising quality.

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    Cryptocurrency Trader Needed 1 day left
    VERIFIED

    Hi, Job Details: We need a crypto Trader CRYPTO NFT STOCK BROKER TRADER INVESTOR - HEDGER - SPECULATOR WHO IS EXPERT IN TOKENIZATION OF OUR 20 ASSETS INCLUDING LAND AND PROPERTY FOR OUR NEW NEW CRYPTO EXCHANGE HERE IN DUBLIN IRELAND. Location: Remote Job Type: Freelance/Contract Duration: Ongoing (with potential for long-term collaboration) I refer you to my Brief of real land, property, and 19 other real live projects, and each one of them is a winner subject to tokenization, and investment. I have attached my video links also which will give all you ambitious ALCHEMISTS who want to transmute each of our 20 projects into multi million euro companies within three years! This 5th DIMENSION ETHOS IS PLATFORMED ON THE TRUTH GOBLET. Here is My Brief: We are presently developing our 5...

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    # Initial Documentation for Backend Development of Synthetic Derivatives Generation Platform via Lightning Network ## Project Overview The objective of this project is to develop the backend of a third-layer platform that uses the Lightning Network to generate multi-hypercollateralized synthetic derivatives, such as a synthetic dollar algorithmic stablecoin backed by 1/3 BTC, 1/3 dollar and 1/ 3 gold. ## General requirements ### Main Features 1. **Lightning Network Integration:** - Implement Lightning Network nodes to facilitate fast and cheap Bitcoin transactions. - Support for creating and managing payment channels. 2. **Generation of Synthetic Derivatives:** - Creation of algorithmic stablecoins backed by multiple assets (BTC, dollar and gold). - Hypercollat...

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    I am looking for an experienced developer who can make Telegram bot for buying tokens and integrate it to solana trading bot project. Key Requirements: - The Telegram bot should be able to fetch messages from a specific Telegram channel. There is no specific format for the messages. - The functionalities of the Telegram bot will be primarily focused on fetching messages from the solana trading channel. Ideal Skills and Experience: - Proficiency in developing Telegram bots. - Experience in integrating bots with trading systems. - Familiarity with Solana blockchain is a plus. Please bid if you're confident of delivering a robust and well-integrated Telegram bot that aligns with the requirements stated above.

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    I am in search of a professional who can seamlessly integrate Blockchain and NFC technologies. Key Requirements: - Proficiency in blockchain technology and its applications. - Strong understanding of NFC (Near Field Communication) and its utilization in secure data transfer. - Ability to create an integrated solution that can be compatible with various platforms and devices.

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    I am learning about crypto currency and testing things out so i am looking for a bit of help to set one up on dex and burn its liquidity etc just looking for a bit of guidance please

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    Easy project 1 day left
    VERIFIED

    Looking for an easy solution for a project.

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    I am looking for a skilled developer to create a fully tested and secure website (frontend, backend + admin panel) with no bugs or issues using the MERN Stack. The key features of the front end design include a responsive design, user-friendly navigation, and custom animations. For the backend it would be clean, and fast high quality code with comments and good organisation and readability. The ideal candidate will have experience working with tight deadlines, provide constant high quality updates and be able to deliver quality work within a short timeframe. Bids: Please provide 3 links to your recent MERN/MEAN projects and provide some documentation or proof that you were the original developer of those 3 websites please. Tech: Front-end Framework: React.js with and State Management + ...

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    Global Single Line MLM System Project 1. Easy Sign-Up and Login: The system should let users easily sign up and securely access their accounts. 2. Deposits and Commissions: The user puts money into the system using Bitcoin (BTC). They earn money by inviting other people. They also earn 40% of the amount they put in every 10 business days. 3. Conditions for Withdrawing Money: After 10 business days, if the user has invited 2 people directly or the system has placed 2 people for them, they can withdraw the total amount to their BTC wallet. Before this, they can see the amount in their backoffice, but the withdraw button will be blocked. 4. How the Single Line Works: All new users join a single line. New users are placed in the line under the oldest user who still needs 2 people. 5. Earni...

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    I'm in need of a skilled developer to create a DeFi platform on the Solana blockchain. The platform should offer a suite of services including staking and yield farming, a decentralized exchange (DEX), and lending and borrowing functionalities. Key Requirements: - I'd like the platform to be secure, so you should be well-versed in conducting audits, implementing smart contract level security, and ensuring user data and accounts are protected. - The user interface should be modern and visually appealing to attract and retain users. Ideal Skills and Experience: - Experience in DeFi and blockchain development, particularly on the Solana network. - Proficiency in smart contract development and security. - Prior experience in creating intuitive and user-friendly interfaces for fin...

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    I am urgently in need of an expert in brute-forcing crypto wallets, specifically the Bitcoin Core Wallet. The main purpose of this project is to help me recover a lost password. If you are experienced in cryptography, ethical hacking, and have a good understanding of blockchain security, this may be a perfect project for you. Key Project Details: - The main goal of the project is to recover a lost password for a Bitcoin Core Wallet, making it essential that you are proficient in brute-forcing crypto wallets. - You must have a good understanding of cryptography, ethical hacking, and blockchain security to effectively handle this Work. Requirements: - Prior experience in brute-forcing crypto wallets and particularly the Bitcoin Core Wallet. - Strong background in cryptography, ethical hack...

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    bitcoin-developer-needed-- 1 hour left
    VERIFIED

    hi there, I need a developer, who can build a bitcoin wallet webapp that will be integrated with the OpenPayd [ ] API, which will allow investors to buy large amount of bitcoin by depositing unlimited amount of fiat via bank transfers. 1. what tech stacks will you use to implement the full-stack? 2. have you worked with OpenPayd API before? 3. how long will the project take you? 4. what is your budget like? Best regards, k

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    He visto el alto impacto y la gran cantidad de tokens volatiles mas que todo "memecoins" que se estan creando a cada minuto en la red de solana, quisiera buscar un freelancer o agencia para desarrollar un bot preferiblemente en lenguaje python, que se pueda ejecutar y hacer snipping a nuevos tokens cumpliendo parametros para evitar scams o rugs , que pueda trabajar cualquier capital en SOL (solana) teniendo una excelente gestion riesgo/beneficio. Necesito personas con conocimientos de programacion y desarrollo de bots con experiencia en blockchain y criptomonedas con el cual podamos trabajar juntos en este proyecto, aqui pueden descargar un ejemplo del codigo del bot que quiero ejecutar, el bot que sea sencillo pero poderoso.

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    BOT SOLANA. 2 days left

    Desarrollar un bot de trading de alta frecuencia (HFT) en la red Solana capaz de ejecutar miles de transacciones diarias de forma autónoma. El bot debe operar bajo una estrategia predefinida y optimizar la velocidad de ejecución para aprovechar oportunidades de mercado en tiempo real, particularmente picos de precios y volatilidad. Develop a high frequency trading (HFT) bot on the Solana network capable of executing thousands of daily transactions autonomously. The bot must operate under a predefined strategy and optimize execution speed to take advantage of real-time market opportunities, particularly price spikes and volatility.

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