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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    34 jobs found, pricing in USD

    I need basic node.js event listener to listen blockchain event of a few addresses and create a transaction when these events happen. I have working javascript html version but I don't know how to make it work on node.js Freelancer should improve first version to have all working functionalities

    $142 (Avg Bid)
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    I'm looking for a developer to connect both the frontend and backend of my current GitHub project () to Geth. The ultimate goal is to have the entire project running smoothly without any errors. If feasible, I also want to incorporate NFTs into the project. Key requirements: - Integrate Geth into both the frontend and backend of the existing project on the provided GitHub link. This should be done in such a way that the project runs without any hitches. - Implement NFTs in the project, primarily for the purpose of tracking medical records. This feature should be seamlessly integrated into the project. Ideal skills and experience: - Proficiency in blockchain technology, specifically Geth and Ethereum. - Prior experience in connecting frontend and backend systems to blockchain network...

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    we're looking for someone to create an erc-20 token for us. also, if you can integrate, you'll have an additional task Key Requirements: - Creation of an ERC-20 token - Integration of the token with smart contracts for decentralized applications Skills and Experience: - Proven track record of creating ERC-20 tokens - Proficiency in integrating tokens with smart contracts for decentralized applications If you're interested, please provide a detailed project proposal in your application.

    $51 / hr (Avg Bid)
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    I'm looking for a skilled blockchain developer to explore and create a bridging service between WBTC and BTC. The ideal candidate should have significant experience in both Ethereum and Bitcoin blockchains and be able to implement the following features: - Instant Transfers: The bridging service should allow for instant transfers between WBTC and BTC, ensuring quick and efficient transactions. - Secure Transactions: Security is paramount. The service should be built with robust security measures to guarantee that all transactions are safe and protected. - Transparent Auditing: The developer should ensure that all transactions are transparent and can be easily audited. In terms of user interface, we're looking for a simple and intuitive design. The developer should strive to cre...

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    Crypto Listing/Sniping Bot for Pancakeswap first of all bot must have anti bot detection I need a bot that detects when new liquidity is added to an AMM (automated market maker) pool on Pancakeswap (runs on the Binance smart chain, bep20 network). The bot needs to detect it and immediately execute a trade according to my parameters. I need to be able to give the bots my own parameters such as: BSC contract address, gas price, max. buying price of the token, selling price of the token, quantity of tokens to buy/sell, slippage Basically I need to be able to be with the first people to buy tokens. IF the basics work we can later add more options. Please do look what it is am asking before you BID BID WHAT YOU ARE WILLING TO WORK FOR..DO NOT ASK A BIGGER PRICE LATER

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    As a Blockchain Partnership Manager, your primary role will include identifying, building and nurturing relationships with other companies in the blockchain industry. You will be responsible for managing these relationships and collaborations, and proactively identifying potential partnership opportunities. Key Responsibilities: * Forming, developing, and managing partnerships within the blockchain sector * Maintaining productive and effective ongoing collaborations * Identifying and exploiting potential new partnership opportunities Ideal Skills and Qualifications: * Strong comprehension of blockchain technology * Extensive experience in managing and forming partnerships * Up-to-date knowledge and understanding of the blockchain industry and trends. Your in-depth understanding and hand...

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    I need an insightful pitch deck that I will use to present unique selling points of my web3 startup to potential investors and partners in the fashion industry. The startup focuses on a revolutionary fashion loyalty program that leverages blockchain technology. Key Requirements: * A deep understanding of blockchain technology and the fashion industry is crucial for this task. * Applicant should have tangible experience in creating compelling pitch decks. * It's important to highlight the unique, innovative aspects of our product and service in a convincing and engaging manner. The perfect freelancer for this project would be able to comprehend the essence of our brand and effectively communicate it through a captivating pitch deck. I have a pitch deck done but there is...

    $342 (Avg Bid)
    NDA
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    I'm seeking a Cybersecurity expert who's willing to offer an internship to educate me in the field of cybersecurity. Key Tasks and Responsibilities: - Training in Network security, Web application security and Data privacy - Guiding me through Vulnerability assessments, Security policy development, and Incident response simulations I need a cyber security internship who can train me in cybersecurity and i will work as free 5 months and if i get the job i will give 2 months fully salary #cybersecurity # blockchain security auditor

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    I'm looking for an expert developer with extensive experience in Solana to enhance my server-side wallet functionality. The ideal candidate should be able to deliver quality work within an extremely tight deadline. Key Requirements: - Expert in Solana: Proven experience in working with Solana is absolutely necessary. The project involves server-side wallet functionality, so deep knowledge of the blockchain technology and its inner workings is crucial. - Proficiency in Typescript: You should be proficient in Typescript – the codebase for the project is written in Typescript, and we need someone who can navigate and enhance it seamlessly. The ideal candidate will have a strong portfolio demonstrating their expertise in Solana and Typescript, and will be able to provide referenc...

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    I'm looking for an experienced developer with a strong understanding of blockchain technology and token creation to build a meme coin on Ethereum (ERC20), Solana (SOL), and Binance Smart Chain (BSC). Key Requirements: - Creation of a meme coin with the primary function of being a lighthearted, community-driven token. - The token must be functional on all three blockchain platforms, ensuring that users can interact with it seamlessly. - Assistance with the design and logo of the token would be a bonus, although I'm open to suggestions. Ideal Skills and Experience: - Proven experience in creating tokens on Ethereum, Solana, and Binance Smart Chain. - Strong understanding of blockchain technology and the specific requirements of ERC20, SOL, and BSC tokens. - Experience in creatin...

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    I'm seeking a dedicated and experienced cybersecurity trainer who is fluent in both Telugu and English to guide me through the ins and outs of real-world cybersecurity situations. Core Topic Areas: - Network security - Web application security - Data protection With some basic knowledge in cybersecurity, I am aiming to bolster my understanding with a more comprehensive course. Hence, I appreciate a trainer who can skilfully integrate practical exercises with theoretical lectures for a more balanced learning style. The ideal candidate is not only qualified in cybersecurity, but also has a knack for teaching, making complex concepts simple and relatable. Key Qualifications & Skills: - Proficiency in Network security, Web application security, and Data protection - Fluency in ...

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    We're building a secure lotto style site targeted at cryptocurrency (bitcoin) enthusiasts and high rollers. Our focus is on creating a safe, inviting environment where users can enjoy real-time betting with a seamless experience. We place a strong emphasis on the following key areas: - User registration and login functionalities - Integration with web3 wallets for secure login - Implementation of provably fair game algorithms to guarantee fair play - Secure storage mechanisms for ordinals or runes - Realtime scraping of the ohio fireball numbers to base results on.(2 drawings a day) The ideal candidate for this project would be experienced in developing secure websites, particularly in the domain of betting. A clear understanding and working knowledge of blockchain technology, espec...

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    About the Project: We are looking for a skilled and innovative freelance developer to create a meme coin from scratch. This project aims to develop a fun and engaging cryptocurrency that leverages the viral nature of memes. The ideal candidate will have a strong background in blockchain technology, smart contract development, and a good understanding of cryptocurrency trends and market dynamics. Responsibilities: Concept Development: Collaborate with our team to define the concept, features, and unique aspects of the meme coin. Blockchain Selection: Recommend the most suitable blockchain platform (e.g., Ethereum, Binance Smart Chain) for the meme coin. Smart Contract Development: Write, test, and deploy smart contracts required for the meme coin, ensuring security and efficie...

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    Job Description: We are looking for an experienced React JS Developer to lead the frontend development of our Chrome Extension Wallet. You will collaborate closely with our backend team to integrate APIs and ensure a smooth, intuitive user experience. This role requires a strong understanding of React JS, as well as familiarity with blockchain technologies. Responsibilities: Develop, maintain, and enhance the frontend of our Chrome Extension Wallet using React JS. Collaborate with backend developers to integrate APIs and ensure seamless data flow. Optimize the application for maximum speed and scalability. Ensure the technical feasibility of UI/UX designs. Implement security and data protection protocols. Troubleshoot and debug issues to improve performance. Stay up-to-date with emergin...

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    We are seeking a professional developer or team to build a platform that facilitates the conversion and transfer of cryptocurrencies across different networks. The goal of this project is to create a secure, fast, and user-friendly system that enables users to convert and transfer digital assets across various blockchains. Responsibilities: Design and Implementation of the Conversion and Transfer Platform: - Design the system architecture - Implement smart contracts to facilitate conversions and transfers Integration with Multiple Networks: Ensure the ability to convert cryptocurrencies between different blockchains (BSC, Polygon, ETH, Tron, Arbitrum) Manage and maintain bridges between networks Conversion and Transfer Capability: - Enable users to convert and transfer cryptocurrenci...

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    I'm looking for a skilled writer with a deep understanding of blockchain technology and experience in the cryptocurrency space. Your main task will be to produce a comprehensive whitepaper that effectively describes our innovative blockchain project. Target Audience: - The whitepaper is intended for potential investors. You should be able to communicate complex technical concepts in a clear, engaging, and persuasive manner to this audience. Technical Details: - The whitepaper should strike a balance between high-level overview and in-depth technical analysis. It should be accessible to a non-technical audience, as well as providing enough technical depth to satisfy those with a more in-depth understanding of blockchain and cryptocurrency. The ideal candidate should have: - Proven ...

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    I'm in need of an experienced developer with a deep understanding of blockchain technology, who can design and build a robust Human Resources Management Software for my company. Key Features: - Employee data management: This software should be capable of storing all employee details securely. - Attendance tracking: A system should be included that tracks and calculates employee attendances. - Performance evaluation: An assessment module for employee performance is crucial. Please note that this software will be used to manage more than 100 employees, hence it should be scalable to handle such capacity. Moreover, the chosen freelancer should possess the ability to integrate blockchain technology in order to make the software highly secure and dependable. Experience in HRM softwar...

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    Solana meme coin 1 day left
    VERIFIED

    We are looking to develop a memecoin with the following specifications: Total Supply: 777,777,777 Burn Rate: 0.7% burn on each transaction. Holder Redistribution: 3% transaction fee, which is redistributed to holders to incentivize holding. Anti-Whale Mechanism: Max transaction limit of 0.7% of the total supply to prevent large-scale dumps. Liquidity Pool Tax: 0.7% that goes directly to the liquidity pool to enhance stability. Wallet max limit: 1.7%

    $14 / hr (Avg Bid)
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    Solana smart contrat dev 1 day left
    VERIFIED

    Hello I am looking for someone to develop the smart contract of my project. this is the characteristic : Solana blockchain Token Initialization: Initializes the token with a maximum and total supply of 99,500,000 tokens. Sets the owner of the contract. Setting Fees: Allows setting the fee percentages for marketing and the team. The combined fees cannot exceed 10%. The fee should be modified between 0% to 10% and not fixed (this is a part of the project) Transferring Gains: Transfers gains in SOL (Solana's cryptocurrency) to the marketing and team wallets according to the defined percentages. Ensures the authority has enough SOL to cover the fees before transferring them. Burning Tokens: Allows burning a specified amount of tokens, thereby reducing the total supply. Upda...

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    We are looking for someone who has direct connections in all the famous exchanges where we can list our tokens. While replying to this bid kindly submit the following details. 1. How soon can you list the token? 2. On Which exchange can you list the token and what would be the approximate amount on each exchange? We are interested in working with only people who have direct connections with top people in listing exchanges. Few details about our token. 1. We do not have any social presence. 2. Total supply is 30m 3. Token is on Binance smart chain If you can do this, let me know soon. Looking forward to working with a skilled professional who can deliver swift, high-quality results.

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    I need a professional to build a trading platform that supports both cryptocurrency and forex. Key Features: - Real-time data updates - Multiple currency pairs - Trade history tracking User Interface Design: I haven't specified a preference for the user interface, so please propose a design that you believe will best meet the needs of this project. Financial Transactions: Users should be able to deposit and withdraw funds through the platform, so experience with secure online transactions is a must. Ideal Skills: - Extensive experience in building trading platforms - Proficiency in working with cryptocurrencies and forex - Strong understanding of real-time data systems - Previous work with secure online financial transactions

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    I'm seeking an experienced developer to create a cryptocurrency Arbitrage trading system. This system will operate across both centralized and decentralized exchanges, and will be capable of executing trades at a high frequency (seconds). Key requirements include: - Building an automated system: I require a fully automated trading system that operates without the need for manual oversight. - Implementing high-speed trading: The system must be designed for high-frequency trading across various cryptocurrency exchanges. Ideal skills for this project would include: - Extensive experience with cryptocurrency trading and arbitrage strategies. - Proficiency in developing automated trading systems. - A deep understanding of both centralized and decentralized exchanges. - Strong ...

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    I'm seeking an experienced professional who can effectively integrate Automated Business Intelligence (ABI) into our existing system. The primary goal of the integration is to significantly improve our organization's efficiency. Key Project Details: - Your main task is to integrate ABI into our current systems. - We would like to see a notable increase in efficiency post ABI integration. Ideal Candidate: - Prior experience in successfully integrating ABI into organizational systems is highly preferred. - You should have a strong track record in improving operational efficiency for businesses through technology. - Familiarity with our industry and the specific systems we use will be a plus.

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    PLEASE READ THE REQUIREMENTS BEFORE BIDDING: We are a crypto recovery service () in need of someone to trace stolen funds from our victim's wallets and connect them to any exchanges the thief is using so we can identify the criminal. From there you will send us the visualization and then we can create a report for law enforcement on our end. Requirements: - We need someone with access to a crypto tracing platform (Chainalysis, AnChain, etc.) or their own program. - We do not need a tool or program made for us. We want you to create the flow of funds yourself and send it to us. We pay: - A flat $100 for providing the flow of funds regardless of a successful recovery - A 5% cut of any successfully recovered assets. Our typical case is $50,000 so this would be $2,500 for you.

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    Hi, I'm looking for a crypto expert who can help me transition my BUSD LP Pool from PancakeSwap to a BNB Pool on a permanent basis. The primary goal of this switch is to increase liquidity. Key Requirements: - Experience in managing and migrating liquidity pools on DeFi platforms like PancakeSwap and BNB Pool. - Understanding of how to increase liquidity in a pool. Your responsibilities would include: - Moving the current BUSD LP Pool from PancakeSwap to a BNB Pool. - Ensuring the new BNB Pool has higher liquidity than the previous BUSD LP Pool. If you have a track record in working with DeFi platforms, are knowledgeable about managing liquidity pools, and could help me achieve higher liquidity in the BNB Pool, I'd love to hear from you.

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    I am seeking a skilled developer who can seamlessly integrate my Facebook and Instagram accounts and include a direct message function on the FB homepage. Ideal candidates will be those with: - Extensive experience in social media integration - A clear understanding of Facebook and Instagram API's - Proven expertise in creating bespoke direct message features Key tasks for this project will include: - Properly linking Facebook to Instagram within my website's infrastructure - Installing a direct message button on the homepage that connects to both social platforms - Enabling Instagram feed display directly on Facebook homepage Please consider that I want the user experience to be as intuitive and straightforward as possible. It's imperative that messages fro...

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    Seeking Professional to Create a New Crypto Token on the Solana Blockchain** **Key Requirements:** - Designed primarily for investment purposes. - Supports various functionalities, including staking, governance, and rewards. **Ideal Skills and Experience:** - Experience in building crypto tokens. - Proficiency in the Solana blockchain. - Understanding of investment-focused token design. - Capability to implement staking, governance, and rewards features. Your task will be to create a fully functional and secure token that can be used for investment activities, while also supporting staking, governance, and rewards. The ideal candidate will have experience in these areas, with a strong grasp of blockchain technology and the specific protocols of the Solana ecosystem.

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    I'm seeking a skilled web3 + blockchain developer who specializes in web3, ethereum development to bring my decentralized application (DApp) concept to life. This DApp is focused on enabling secure and seamless peer-to-peer information exchange within an innovative platform. Here's what I need from the freelancer who will undertake this project: **Key Requirements:** - Proficiency in Solidity programming for creating and managing smart contracts. - Experience in developing DApps on the Ethereum platform. - Strong understanding of peer-to-peer systems within a blockchain context. - Ability to integrate user authentication measures to ensure transaction security. **Project Goals:** - Develop robust web3 Ethereum smart contracts as the foundation of the DApp. - Implement a secure...

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    I am looking for a mid-level developer with 3-5 years of experience in Typescript, Web3, and MongoDB. The main focus will be creating a web application that integrates blockchain technology. Key Responsibilities: - Developing a database-driven web application - Implementing User authentication and authorization - Smart contract development and deployment - Real-time data updates Ideal Candidate: - 1-5 years of experience with Typescript, Web3, and MongoDB - Demonstrable experience of integrating blockchain technology into web applications - Strong understanding of user authentication and authorization - Ability to develop, deploy and manage smart contracts - Proficient in creating real-time data updates Please get in touch if you feel you meet the criteria and are intere...

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    I'm in need of a Telegram bot that combines the functionalities of a Trivia, Quiz, and Role-playing game, while also integrating with Twitter and Instagram. - The bot should have basic commands for ease of use. - The game-like features should be engaging and interactive. - The integration with Twitter and Instagram should allow for seamless posting or interaction with these platforms. I'm looking for a developer with experience in creating Telegram bots similar to "hamster kombat", as well as integrating various API for social media platforms. Experience in game development and interactive bots is a plus.

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    In need of a proficient game developer to create a crypto play-to-earn (P2E) game primed for both PC and mobile (iOS/Android). Pokemon style graphics and simple yes/no interactions with player and npc. Key Project Features: - Crypto functionalities integration: Centrally, the game should be able to read wallet tokens, and award players with airdrops based on random spins. - Cross-platform compatibility: The game must operate smoothly on both PC and mobile platforms. - Must be able to integrate Base network tokens and al Major EVM Wallets Ideal Candidate Profile: - Experienced in P2E game development. - Game development - Familiarity with blockchain technology and crypto transactions. - Strong ability in designing for cross-platform compatibility. - Dedicated, inventive, and punctual.

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    I'm in need of a skilled and experienced full-stack blockchain developer. Ideal Skills and Experiences: - Proficient in programming languages: Solidity and JavaScript. - Familiarity and experience working with blockchain platforms i.e., Ethereum, Hyperledger Fabric, and Corda. Functionality Requirements: - The ability to develop Smart contracts. - Experience with Tokenization. - Development of Decentralized applications (dApps). Please check the JD. We are an open, committed and enthusiastic team with what we are building. If you like challenges and growing in a pleasant environment, please apply.

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    We are seeking an experienced freelancer to develop a Peer-to-Peer (P2P) currency exchange application with full integration of the Stellar Lumens blockchain. This application will allow users to seamlessly deposit, exchange, and withdraw various currencies through a decentralized network, leveraging the Stellar blockchain for secure and efficient transactions. Key Features User Registration and Authentication Secure sign-up and login process Two-factor authentication (2FA) User profile management Wallet Management Creation and management of Stellar wallets Balance display and transaction history Secure storage of private keys P2P Exchange Functionality Posting of buy and sell offers Matching engine for trades Escrow system to secure transactions Stellar Integration Deposit and withdr...

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    Dextool/ Dexscreener Clone 2 days left
    VERIFIED

    I'm looking for a skilled developer to create a Defi similar to Dextool/Dexscreener. The project will require a comprehensive understanding of cryptocurrency markets, and the ability to create a robust tracking and information system. Ideal skills and experience for this project include: - Proficiency with real-time data integration - Extensive experience with cryptocurrency-related projects - Strong analytical and problem-solving skills - Familiarity with blockchain technologies - The ability to design and develop user-friendly interfaces I need a clone of Dexscreener for the BASE chain. a. We need to pull data from various AMMs like UniSwap, base swap, Alien Base, PCS b. Display those data in our design which is pretty much similar to Dexscreener c. Dex supports many Blockch...

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