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 customers have posted amazing projects covering a variety of use cases related to blockchain utilising the Freelancer verified experts. With help from professionals on 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 now!

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    Only XRPL experience please, USA freelancers preffered. Full development, front end back end smart contract develoment Full service, wallet, onramp offramp and exchange Please mention full bid amount and timeframe with an example of work done

    €426 (Avg Bid)
    €426 Povprečna ponudba
    19 ponudb

    Are you a talented freelance developer with !!expertise in the Cosmos SDK framework!! and experience in implementing consensus protocols? We have an exciting opportunity for you! Project Description: We require a developer to assist us in implementing a new consensus algorithm within the Cosmos SDK framework. The algorithm, which relies on timestamped events, will replace the existing tendermint consensus protocol in a default Cosmos SDK project using Deliverables: Integrate the Cosmos SDK framework into our existing project, ensuring compatibility and modularity. Implement the custom consensus algorithm, based on timestamped events, to replace the current consensus protocol within the Cosmos SDK using default project. Requirements: Proficiency in developing blockchain appl...

    €439 (Avg Bid)
    €439 Povprečna ponudba
    7 ponudb

    I am seeking a developer who can modify my existing blockchain project on Ethereum. The modifications will involve both front-end and back-end changes to enable sending submitted and task completed messages to registered mobile numbers. The purpose of these messages is to confirm the completion of tasks. The ideal candidate should have experience working with Ethereum and be proficient in both front-end and back-end development.

    €21 (Avg Bid)
    €21 Povprečna ponudba
    2 ponudb

    I am looking for a website designer for a meme coin. I do not have any specific design preferences or inspirations, I can give you an idea only with a few sentences. You have to deliver HTML codes for a website. Ideal skills and experience for this job include: - Website design - Logo design - Knowledge of cryptocurrency - HTML/CSS If you don't know the MEME coin, please don't apply

    €180 (Avg Bid)
    €180 Povprečna ponudba
    59 ponudb

    Must show progress daily!!! I am looking for a skilled blockchain and UI developer to help create a smart contract for a swap and pool sales contract. The ideal candidate will have experience with Polygon and ERC-20 tokens. We are seeking a smart contract developer to create a Swap and Pool Sales Contract on the Polygon network using already deployed contracts for tokens. Ideally candidate can integrate and build UI. The tokens used for this contract are SC, SN, and SK reward token, and the staking contracts include LV1POS = 19SC:1SN, LV2POS = 19SC:2SN, LV3POS = 19SC:3SN, LV4POS = 19SC:4SN The flow of the swap is as follows: 1. Liquidity providers deposit any of the 4 POS into the swap pool. 2. The pool contract unstakes the POS, leaving the SC and SN tokens loose in the ...

    €390 (Avg Bid)
    €390 Povprečna ponudba
    5 ponudb
    Need Crypto Bot Developer -- 2 6 dni left

    I need Need Crypto Bot Developer for Binance future trade. The bot is used for future trading and only takes sell orders. Bot First check highest price of coin in future trade platform in 4 hrs, Example if that coin highest price in last 4 hrs $1000 then bot take sell order

    €99 (Avg Bid)
    €99 Povprečna ponudba
    5 ponudb

    We are currently seeking a proficient and experienced professional who specializes in gas-efficient airdrops using smart contracts. If you possess the necessary expertise in this area and have a proven track record of executing successful gas-efficient airdrops, we invite you to apply for this project.

    €43 (Avg Bid)
    €43 Povprečna ponudba
    5 ponudb

    my site is it is a wordpress theme that connects to a server folder on my dedicated server. you may sign up for the site, but no i wont give you admin access until you accept job, because the server actually creates private and public keys and holds current user information. 1) how ever the previously developer coded in the functions to connect to the server is causing the server to use too much resources, this needs to be fixed 2) the server is programmed for shib inu, apecoin, bitcoin, xrp, ethereum... i need you to be able to make sure its coded currectly in the server for receive, transfer, balance, etc 3) on the wordpress side, its already 80% coded for internal transfer (user to userr) and external ( sending to sites like coinbase, etc) i need this fixed my site is a wcfm mar...

    €1025 (Avg Bid)
    €1025 Povprečna ponudba
    69 ponudb

    I am looking for a skilled freelancer to fix a Tokengating bug and integrate Metamask into my project. The ideal candidate should have: - Experience in implementing Tokengating and integrating Metamask - A proven track record of past work in similar projects - The ability to provide detailed project proposals Please include your past work in your application.

    €6 / hr (Avg Bid)
    €6 / hr Povprečna ponudba
    4 ponudb
    QA Tester for web3 application 4 dni left

    We are looking for a QA Tester to help us test our web3 application. Our primary focus is on usability testing, so we need someone with experience in that area. In addition, we would prefer someone who has worked with web3 applications before. We have no specific requirements for programming languages. The testing needs to be completed within a week, so we need someone who can work quickly and efficiently. You will be given a spreadsheet of test cases and be asked to record your testing using Loom or another screen recording software. If you have the skills and experience we need, please submit a proposal.

    €157 (Avg Bid)
    €157 Povprečna ponudba
    70 ponudb

    I am looking for a skilled developer who can create a token using the Solidity program. The token standard that I have in mind is ERC-20. The primary purpose of the token is for payment. I am looking for standard features only and do not have any unique token features or requirements. Ideal skills and experience for this job include proficiency in Solidity programming, experience with ERC-20 token creation, and knowledge of blockchain technology.

    €1152 (Avg Bid)
    €1152 Povprečna ponudba
    76 ponudb
    Solana Simple Project 4 dni left

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

    €98 (Avg Bid)
    €98 Povprečna ponudba
    12 ponudb

    is seeking a skilled and imaginative NFT Art Expert to join our team. As our NFT Art Expert, you will be responsible for creating unique and visually striking NFT artworks that will be sold on our platform. Responsibilities: Create high-quality NFT artworks that align with our brand's visual style and identity. Work with our development team to ensure that all NFTs are optimized for blockchain and the Ethereum network. Collaborate with our marketing team to promote and market the NFTs on our platform. Research and stay up-to-date on the latest NFT trends and techniques. Requirements: Strong portfolio showcasing your NFT art skills. Proficient in using NFT marketplaces such as OpenSea and Rarible. Excellent communication and collaboration skills. Ability to work independently and...

    €276 (Avg Bid)
    €276 Povprečna ponudba
    11 ponudb
    Thorchain / Midgard / Bifröst 4 dni left

    I'm looking for someone who has successfully forked Thorchain, and/or who has successfully had midgard read data only from their own local thornode. I am facing the problem at dashboardData function. it is related to the midgard env. This is a long term job if you prefer. In your job application, let me know how you can specifically assist.

    €31 / hr (Avg Bid)
    €31 / hr Povprečna ponudba
    23 ponudb
    Blockchain Development Project 4 dni left

    We are looking for an experienced blockchain developer to create a custom blockchain solution based on Bitcoin Core and Tron. The project will be divided into several milestones, each focusing on key components of the blockchain ecosystem. We will pay for each milestone upon successful completion. Milestones: Blockchain in Testnet: Set up a testnet environment for the blockchain, ensuring proper configuration and functionality. Mining Software CLI for Linux: Develop command-line mining software compatible with Linux systems, enabling efficient mining operations. Mining Pool: Design and implement a robust mining pool, allowing multiple miners to collaborate and share resources. Mining Pool Website: Create a user-friendly website for the mining pool, providing miners with essential info...

    €3969 (Avg Bid)
    €3969 Povprečna ponudba
    76 ponudb

    I need to develop a Stable Coin on Polygon. I have the details ready, my budget is less. Either help understand the logic or develop it for me.

    €22 / hr (Avg Bid)
    €22 / hr Povprečna ponudba
    20 ponudb

    Need an NFT minting platform to deploy my collections on the Cronos network and generate sales. Later i'd like to add a staking feature with my own CRO Token as rewards

    €479 (Avg Bid)
    €479 Povprečna ponudba
    37 ponudb

    Im looking for a good developer who has experience with Flow blockchain. I want someone to show me the steps to accomplish these tasks (and I should be able to do in on computer too). 1. create and deploy an nft collection contract on flow blockchain (using UI or using sdk or api anything works - if sdk/api, then I prefer to use python, if not possible then javascript is fine.) 2. be able to send nfts from my account to other accounts (has to be using sdk/api) 3. create a flow account (public key and private key, and then get the address from the public key - has to be using sdk/api ). Below github repository has good resources, would be great if someone can use it and accomplish these tasks using this python sdk: I want the work today!

    €1293 (Avg Bid)
    €1293 Povprečna ponudba
    55 ponudb

    The Free Universal Network (FUN) MLM Business Plan FUN introduces a smorgasbord of 25 programs ranging from teens to adult services, gaming to gambling, telecom to email, social media programs, chat services, SAAS to eCommerce programs, and more. We need a Marketplace allowing merchants to sell products and services to our members within the member area, thus we need a wallet, there is a business directory, and an auction area. Merchants can use an internal email marketing tool within our web-based email feature. All the FUN programs are free to join, but they come with locked features. To unlock the features, the user must purchase a Smart Contract, and these can be paid yearly or monthly. In other words, a user who wishes to unlock all 50 FUN programs, must order and activate 50 Smart...

    €8418 (Avg Bid)
    Pogodba o nerazkritju informacij
    €8418 Povprečna ponudba
    27 ponudb
    Blockchain Technology 3 dni left

    Task 1: Referring to “Barriers Affecting Higher Education Institutions’ Adoption of Blockchain Technology: A Qualitative Study” analyse the following: a. Analyse four technological barriers in the adoption of blockchain in Higher Education Institutions b. Discuss the problems and Security Issues given case study. c. Analyse the Legal Issues and Lack of Regulatory Compliance. Task 2: Using Virtual machine/ virtual studio code/Ethereum remix IDE or you can install any suitable blockchain platform (Ethereum, Hyperledger or IBM blockchain platform to perform the following: a. Smart Contract with analysing the code. b. Analyse the compiled data in build smart contract after running transaction.

    €5134 (Avg Bid)
    €5134 Povprečna ponudba
    5 ponudb

    About the position LOCATION Regional remote US INDUSTRY/DOMAINS Blockchain CLIENT EVP/MISSION Decentralized NASDAQ, opening up an entirely new design space for DeFi. RESPONSIBILITIES We are the fastest Layer 1 blockchain uniquely optimized for trading, designed to give DeFi apps an unfair advantage. As we go full steam in building our platform and products, we are looking for a full-time full-stack engineer with strong front-end and back-end skills and L1 blockchain. About the candidate MUST HAVE 2+ years as a professional software engineer CosmWasm experienced (Rust, GoLang) Has worked as a core engineer on an Layer 1 blockchain on a scaling-related product (ie. rollups) Expert at building web applications (frontend + backend) from scratch Has a strong sense of ownership an...

    €4431 (Avg Bid)
    €4431 Povprečna ponudba
    15 ponudb
    Small React task 2 dni left

    Hello Freelancers, I am looking for a skilled developer who has experience in React. I am going to fork a site () but don't just want to fork it. As you can see, the site is not so good to see. You must build it with React. I want eye-catch and user-friendly UI/UX for this project.

    €99 (Avg Bid)
    €99 Povprečna ponudba
    41 ponudb

    I am looking for a freelancer to develop an ERC-20 copy trading program that will run on the Ethereum platform. The program's interface should be highly customizable and advanced. Ideal Skills and Experience: - Proficiency in developing ERC-20 copy trading programs - Strong understanding of the Ethereum platform - Experience in developing advanced and customizable interfaces - Knowledge of trading strategies and market analysis - Ability to work collaboratively with the client to ensure project success I input the address to monitor, program refreshes target address every 30 seconds or so. If that address makes a trade on uniswap / sushiswap or some other exchange I want the program to do the same exact trade as the address it's been monitoring. Program must connect with Meta...

    €721 (Avg Bid)
    €721 Povprečna ponudba
    22 ponudb

    I am in need of a developer who can help me create a Smart Contract for a Launchpool on my website. Specifically, I am looking for a Sealed-bid Auction style Launchpool. My website is on a custom-built platform, so experience with this type of platform is ideal. The ideal developer should have experience in Smart Contract creation, blockchain technology, and integrating Launchpools onto websites.

    €13 / hr (Avg Bid)
    €13 / hr Povprečna ponudba
    30 ponudb

    I am looking for an experienced Smart Contract Expert with knowledge in Flutter and Metamask to modify an application .The primary purpose of the smart contract is for a Decentralized Application. I do not need an existing front-end for the decentralized application as I only make register in my app. Ideal skills and experience for this job include: - Strong experience in developing smart contracts for Binance Smart Chain - Proficiency in using Flutter and Metamask - Ability to work independently and efficiently - Knowledge in blockchain technology and decentralized applications If you have the required skills and experience, please apply for this job and provide information on your relevant experience.

    €1587 (Avg Bid)
    €1587 Povprečna ponudba
    8 ponudb
    Need blockchain game developer 1 dan left

    I am looking for a blockchain game developer to create an endless runner game that can be played on a web browser. I have some general preferences for the design and theme of the game, but I am open to suggestions. The ideal candidate should have experience in developing blockchain games and be proficient in creating games for web browsers. Additionally, knowledge of smart contracts and blockchain technology is a plus.

    €9300 (Avg Bid)
    €9300 Povprečna ponudba
    33 ponudb

    Using openzeppelin on ethereum blockchain. Looking to be able to have owners sell fractional pieces of their real estate assets using smart contracts

    €21 / hr (Avg Bid)
    €21 / hr Povprečna ponudba
    34 ponudb

    I am looking for a Twitter Content Creator and brand builder for my blockchain project. My main goal is to increase brand awareness through conversational tweets. I prefer informative and promotional tweets that engage with the audience. Content should be posted 2-3 times a day to keep the audience engaged. Must write "I have worked with blockchain <blockchain name> in the past." in your proposal to get attention. Ideal skills and experience: - Proven experience in social media management and content creation - Strong understanding of the blockchain industry - Ability to create engaging and conversational content - Knowledge of Twitter analytics and ability to track and measure success - Excellent communication and writing skills.

    €5 / hr (Avg Bid)
    €5 / hr Povprečna ponudba
    15 ponudb

    Perfect candidate must have experience with gas efficient airdrops using various methods.

    €440 (Avg Bid)
    €440 Povprečna ponudba
    11 ponudb

    I am looking for a skilled blockchain and UI developer to help create a smart contract for a swap and pool sales contract. The ideal candidate will have experience with Polygon and ERC-20 tokens. We are seeking a smart contract developer to create a Swap and Pool Sales Contract on the Polygon network using already deployed contracts for tokens and staking. Ideally candidate can integrate and build UI. The tokens used for this contract are SC, SN, and SK reward token, and the staking contracts include LV1POS = 19SC:1SN, LV2POS = 19SC:2SN, LV3POS = 19SC:3SN, LV4POS = 19SC:4SN The flow of the swap is as follows: 1. Liquidity providers deposit any of the 4 POS into the swap pool. 2. The pool contract unstakes the POS, leaving the SC and SN tokens loose in the pool. 3. Buyers...

    €796 (Avg Bid)
    €796 Povprečna ponudba
    48 ponudb

    I am looking for computer engineers and IT engineers to help me build a cryptocurrency mining server. The primary purpose of this project will be to mine Bitcoin on a basic level of server performance. The server will be named "". Skills and experience required: - Expertise in cryptocurrency mining - Knowledge of server building and maintenance - Experience with Bitcoin mining - Familiarity with basic server performance optimization.

    €130 (Avg Bid)
    €130 Povprečna ponudba
    4 ponudb
    Arbitrage Bot 2 ur left

    Hi I am looking to PURCHASE a demonstrable PROFITABLE ARBITRAGE crypto bot on ANY chain. It must have a smart contract and bot functionality. ONLY apply if you have one that fits the EXACT criteria and you can show me EVIDENCE of this bot in the form of recent wallet addresses. I DON'T want an exchange to exchange bot or software that shows me where arbs could be, etc, etc. If you have read the above description and have exactly what I am looking for please start with your application to me with these keywords, I HAVE THE BOT THAT YOU NEED. Thank you.

    €1172 (Avg Bid)
    €1172 Povprečna ponudba
    29 ponudb

    I currently have a Songbird Node which we can use for it. I need to just update it automatically with a cronjob

    €18 (Avg Bid)
    €18 Povprečna ponudba
    6 ponudb

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