Blockchain is a distributed register that is used to maintain a continuously growing list of records, called blocks. It has revolutionary applications in finance (such as cryptocurrencies like Bitcoin) and decentralized applications like online voting.

Palkkaa Blockchain Developers

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    73 työtä löytyi, hinnoittelu EUR
    Build me an NFT 6 päivää left
    VARMENNETTU

    I need an artist will build me an NFT at cheap price.

    €20 (Avg Bid)
    €20 Keskimäär. tarjous
    6 tarjoukset

    I need an React.Js & Truffle expert to set up and run following Github Project. Payment will be proceed after I have checked screenshots or video of this project running. No coding, just run this project on windows os. Project Link :

    €18 (Avg Bid)
    €18 Keskimäär. tarjous
    7 tarjoukset
    Bitcoin / Other Crypto Mining 6 päivää left
    VARMENNETTU

    Looking for an expert in development unique crypto mining platforms that allows for optimal profitability / energy efficiency with the project timing to be as quickly as feasibly possible The project will be discussed in more detailed with the freelancer.

    €490 (Avg Bid)
    €490 Keskimäär. tarjous
    29 tarjoukset

    I am looking for someone to create a Tip Feature for Twitter similar to for my Crypto tokens that have been created on the Songbird Network

    €360 (Avg Bid)
    €360 Keskimäär. tarjous
    8 tarjoukset

    Blockchain have been an interesting research area for a long time and the benets it provides have been used by a number of various industries. Similarly, the healthcare sector stands to benet immensely from the blockchain technology due to security, privacy, condentiality and decentralization. Nevertheless, the Electronic Health Record (EHR) systems face problems regarding data security, integrity and management. In this paper, we discuss how the blockchain technology can be used to transform the EHR systems and could be a solution of these issues. We present a framework that could be used for the implementation of blockchain technology in healthcare sector for EHR. The aim of our proposed framework is rstly to implement blockchain technology for EHR and secondly to provide secure stor...

    €43 (Avg Bid)
    €43 Keskimäär. tarjous
    6 tarjoukset

    I want an arbitrage bot. Have you done arbitrage bot?

    €530 (Avg Bid)
    €530 Keskimäär. tarjous
    20 tarjoukset

    need a dev who can edit the python script of arbitrage bot on cex . and add feature like checking withdrawals and deposits on signal exchagnes if they are on or not and execute the trade if they are on

    €178 (Avg Bid)
    €178 Keskimäär. tarjous
    18 tarjoukset

    EDIT a python code for a crypto bot + make a back end

    €14 / hr (Avg Bid)
    €14 / hr Keskimäär. tarjous
    9 tarjoukset

    I basically need someone to build a python script or fix an existing one that can transfer tron (TRC20) tokens. Thanks.

    €155 (Avg Bid)
    €155 Keskimäär. tarjous
    35 tarjoukset

    Hi, I'm Looking For Crypto Exchange Development With App IOS & Android As Well Desktop App For MacOS , Windows , Linux Kindly Send Me Quote Of This Project Expert Team Need

    €3073 (Avg Bid)
    €3073 Keskimäär. tarjous
    10 tarjoukset

    We are going to develop Betting project using NFT price. They have to have full experience with smart contract, chainlink oracle.

    €36 / hr (Avg Bid)
    €36 / hr Keskimäär. tarjous
    15 tarjoukset

    What I'm looking for: An experienced ReactJS developer to help fixing bugs of DEX. You'll work on the issues of the Github repo. The right developer will have experience in the following: - Familiar with and blockchain - Clean code - Don't upload the project on the public repo. - Honest timeline of the actual work - Using Github issues - Using Clockify for tracking time - Available 9:30-4:30 EST - Slack communication - $15-$17/hr I'm a developer, so I know how much time each issue take. If you're going to log more time than your actual work time, don't apply this position. This is a full time work. If you're honest on the timeline of your work, you'll get endless tasks. This is a full time work. If you're honest on the timeline...

    €3882 (Avg Bid)
    €3882 Keskimäär. tarjous
    25 tarjoukset
    AWS Devops - Lamda & Docker Functions 5 päivää left
    VARMENNETTU

    1. Need DevOps consultant with experience in AWS services 2. Expertise required on deployment and configuration of AWS API gateway, developing and deploying AWS Lambda function, deployment and configuration of docker containers on AWS EC2 3. Any experience with blockchain is a plus

    €94 (Avg Bid)
    €94 Keskimäär. tarjous
    8 tarjoukset
    Continue developing NFT music marketplace 5 päivää left
    VARMENNETTU

    We have built a music NFT marketplace on the BSC Looking for someone who can add features and refine some front end. Like do collections Having people invest in music So do some smart contracts Make muzix multichain Add extra roles on platform and some ux

    €22 / hr (Avg Bid)
    €22 / hr Keskimäär. tarjous
    50 tarjoukset
    Crypto Flashing bot 5 päivää left
    VARMENNETTU

    If anyone knows how to create any crypto Flashing Bot. Please let me know your offer.

    €224 (Avg Bid)
    €224 Keskimäär. tarjous
    31 tarjoukset

    Need 2-4 pages of roadmap (technical guideline) to develop a purely phone-based blockchain network similar as pi network.: 1. Solution to build a new blockchain, or using existing blockchain, to create a new system/community/cryptocurrency. 2. Similar to Pi Networking, that is purely based on phone users, and based on phone mining. (so, basically, not PoW or PoS based chain). 3. Should be able to let all users to vote for certain issues, and be able to change the block data under majority user's agreement (For example, A's account has been stolen by user B. Under majority user's agreement by vote, the system can change the block data, and make A's stolen currency back from B). The guideline should be clearly state the solution and answers for following: what's th...

    €4887 (Avg Bid)
    €4887 Keskimäär. tarjous
    26 tarjoukset
    Rust backend developer 4 päivää left
    VARMENNETTU

    Hello please write me via chat Namely I need to develop thread pool for application with code THREAD

    €22 (Avg Bid)
    €22 Keskimäär. tarjous
    6 tarjoukset

    Our project has some success with NFTs (Ethereum). We have ERC721a NFTs that were minted, they generate ERC20 currency tokens, this combines to breed an ERC1155 item. If you don't answer the questions I don't accept your proposal. Next, the ERC115 and ERC20 combine to form another ERC721a family member. Finally we have multiple other scenarios combining above to form even more special characters. There are multiple collections and various transactions in this ecosystem, some community members do them right away at the same time if they have enough assets. Some of the traits on-chain metadata gets updated too. 1. Which of the above token types are you most and least familiar with, or are you good at problem-solving to figuring out any of them? 2. How can we combine some of th...

    €34 / hr (Avg Bid)
    €34 / hr Keskimäär. tarjous
    39 tarjoukset
    Technical document writer 4 päivää left
    VARMENNETTU

    Need to writer a Technical specification for a Crypto website. Person should have a prior experience in writing on those topics.

    €3 / hr (Avg Bid)
    €3 / hr Keskimäär. tarjous
    19 tarjoukset
    Solidity smartcontract 4 päivää left

    I need a simple smartcontrat with solidity, I need only the code to put it in Remix IDE, requeriments: - 10,000 NFTs - Maximum 3 NFTs per wallet. - One NFT per transaction. - A button to pause the contract. - A button to upload the collection unrevealed and reveal when I want using that button. - Only withdrawls to my wallet, I have seen contracts with commissions to strange people, I don't want it. -The NFT collection is set to sell on OpenSea with polygon, price per NFT 25 matic - Maximum time per sell one week. Thank you for your help!

    €649 (Avg Bid)
    €649 Keskimäär. tarjous
    55 tarjoukset

    I need an expert who has good understanding DEX for my project. Deep knowledge of AMM, Price calculation is preferred. This is serious and large project, only experts are welcome.

    €36 / hr (Avg Bid)
    €36 / hr Keskimäär. tarjous
    13 tarjoukset

    I need an expert who has good understanding DEX for my project. Deep knowledge of AMM, Price calculation is preferred. This is serious and large project, only experts are welcome.

    €57 / hr (Avg Bid)
    €57 / hr Keskimäär. tarjous
    5 tarjoukset
    Node.js Bitcoin wrapper 4 päivää left

    I need to be able to connect node.js to a btc wallet which I own and I need to be able to send coins programmatically. This should involve a simple module around 100-200 lines which I can easily integrate into my code. I can only pay exactly $40

    €38 (Avg Bid)
    €38 Keskimäär. tarjous
    6 tarjoukset
    NFT GAME DEVELOPER 4 päivää left

    Hello, I need an NFT Game developer

    €4548 (Avg Bid)
    €4548 Keskimäär. tarjous
    24 tarjoukset
    Blockchain Developer 3 päivää left
    VARMENNETTU

    We are expecting blockchain developer to develop our own concept,

    €578 (Avg Bid)
    €578 Keskimäär. tarjous
    13 tarjoukset

    We have issue in ledger wallet sign message function . There is no any function in solana wallet adapter for that and we need to figure out and implement sign message function ourselves.

    €573 (Avg Bid)
    €573 Keskimäär. tarjous
    15 tarjoukset
    Need a nft marketplace 3 päivää left
    VARMENNETTU

    We need a website where users can buy nfts created from admin panels, automatic replies will be ignored.

    €2720 (Avg Bid)
    €2720 Keskimäär. tarjous
    38 tarjoukset

    I run a business where I receive payments online for services. I use payment gateways for this purpose which cost quite heavily. i am looking for an experienced developer who could build payment integrated system for my website using blockchain technology.

    €537 (Avg Bid)
    €537 Keskimäär. tarjous
    22 tarjoukset

    Hi, We have requirement of Custom BEP-20 Token Development with Below feature Part One (Token Development) BEP-20 Token Total Supply 2500000 Minable (Owner can Mint more token) Max Sell Per Transaction : 10000 Coins Max Sell Per Day : 100000 Coins Max Buy Per Transaction : 100000 Coins Max Buy Per Day : 1000000 Coins Transaction Fee : Sale : 10% Purchase : 1% All above can be editable by Owner/Admin Part 2 Web3 Integration 1. When use will click on Buy Package it will be connected to Trust Wallet/Metamask and amount will be deducted from Wallet Trust Wallet/Metamask on successful event 2. When user will withdraw amount token for the same amount will be credited in to Trust Wallet/Metamask For more explanation will do zoom meeting

    €747 (Avg Bid)
    €747 Keskimäär. tarjous
    23 tarjoukset

    We at Alaio is looking for a strong content writer who can write social media post/blogs content for our platforms. Native English speaker Portfolio & samples of work Bachelor’s degree in Journalism or similar field Minimum 3-4 years in the blockchain space or similar technology area SEO experience is a plus Experience with Medium & Mailchimp Great communication skills Knowledgeable about technology & blockchain 3+ years experience in writing technical papers Ability to work under pressure – especially under tight deadlines

    €87 (Avg Bid)
    €87 Keskimäär. tarjous
    43 tarjoukset

    Build and deploy your contract using truffle. Write a node-js script to send the transaction. Write a node-js script to get the transaction. Its very simple i have not time so you can do it for me Budget 10$ fixed not a big task

    €25 (Avg Bid)
    €25 Keskimäär. tarjous
    8 tarjoukset

    I need to create a custom defi app on Tron blockchain 1) Create frontend and connect with Tronlink browser plugin so that people can login using Tronlink 2) Create a DASHBOARD (there already is ) 3) Implement staking (Mongo Based not chain based --> code already is there need to update) 4) Create realtime price graph (based on market pair of tokenA:tokenB) The above codes are almost there so developer should be able to extract and redeploy 1) Make the frontend able to connect to steem blockchain using steemkeychain 3) Make use of steemjs to listen to incoming transaction in an specific account (i.e incoming steem transactions) 4) Execute tron transaction based on the steem transaction 5) enable steem vote selling by using steem token itself or trc20 tokens on our platform 6) en...

    €1781 (Avg Bid)
    €1781 Keskimäär. tarjous
    13 tarjoukset
    Real Estate Blockchain APP 3 päivää left
    VARMENNETTU

    Attention please! Please read the job description and links, attachment carefully before you apply to this job. Hello, I am looking for an expert blockchain app developer to create and escrow app for small to large transactions using fiat currency, possibly using chainlink for the conversion. here i will upload a powerpoint presentation on the basic app functions and a few links that show how this can be done on the blockchain. This job will be required to be built from scratch, backend and front end, the user interface design. The app needs to be compatible across all platforms, iPhone, tablets, android devices. Im looking for a seamless integration and has to be build in a way that is scalable for all future added features. ESCROW ON THE BLOCKCHAIN How to use blockchain for escrow t...

    €147 / hr (Avg Bid)
    €147 / hr Keskimäär. tarjous
    88 tarjoukset

    This is a bootstrapped startup with potential to scale rapidly. Experience and passion for blockchain, smart contracts, Dapp, DAO required.

    €2516 (Avg Bid)
    Mainostettu
    €2516 Keskimäär. tarjous
    74 tarjoukset
    Application like WhatsApp in Web3 3 päivää left
    VARMENNETTU

    I would like to create a messaging api like WhatsApp but in web 3 connection only

    €1318 (Avg Bid)
    €1318 Keskimäär. tarjous
    28 tarjoukset

    Blockchain network is Solana and ETH. I wish to sell traits and base characters on Solana. But when the user creates their new nft they can choose between ETH or solana. Once they decide which block chain the nft is blocked from the other

    €585 (Avg Bid)
    €585 Keskimäär. tarjous
    52 tarjoukset
    ICO development 3 päivää left

    I would like to know how much would cost a complete whitepaper for the ICO which is currently being planned. Basically, I want to raise capital to invest in Brazil real economy businesses through crypto.

    €459 (Avg Bid)
    €459 Keskimäär. tarjous
    20 tarjoukset
    ICO development -- 2 3 päivää left

    I would like to know how much would cost a complete whitepaper for the ICO which is currently being planned. Basically, I want to raise capital to invest in Brazil real economy businesses through crypto.

    €221 (Avg Bid)
    €221 Keskimäär. tarjous
    17 tarjoukset
    Crypto wallet -- 2 3 päivää left

    I am looking for a web3 developer to design and deliver a crypto wallet with minting in wallet

    €1618 (Avg Bid)
    €1618 Keskimäär. tarjous
    37 tarjoukset
    Supply Chain Blockchain 3 päivää left
    VARMENNETTU

    We are looking to develop a blockchain system to store all the data collected throughout the coffee supply chain. This includes 4 checkpoints, harvest (origin & farm owner), wet mill & fermentation, dry mill (parchment coffee to green beans, grading, packaging) and #4 logistics. Final User may have the ability to scan a QR code to access the information. Users at origin need to upload information from a cell phone using 4G or LTE Internet connectivity. Project will need an Administrative panel development for data adding (with options of text editing, uploading assets and the events) to show them on a landing page.

    €3193 (Avg Bid)
    €3193 Keskimäär. tarjous
    86 tarjoukset

    I have an MP4 file that I'd like to be the base, and the other files I'd like to be mounted on the card. So I need the .jpeg files turned into a collection mounted on this 3d card. Let me know if you can do this.

    €2794 (Avg Bid)
    €2794 Keskimäär. tarjous
    41 tarjoukset

    I need a smart contract auditor with experience on this field. He'll join the team of a top cybersecurity firm. RUST LENGUAGE REQUIRED. You can work on others project, we'll only contract you as a freelancer when audits needed but you'll be in the team only. Various audits done with us could lead to a full employment contract. We need an audit URGENTLY. If you send me a copy & paste experience description you'll not be hired.

    €691 (Avg Bid)
    €691 Keskimäär. tarjous
    22 tarjoukset

    Fintech Blockchain project, its

    €2901 (Avg Bid)
    €2901 Keskimäär. tarjous
    16 tarjoukset
    Build a testnet chain with evm 2 päivää left
    VARMENNETTU

    Please bid with the cost you think this can be built with

    €1617 (Avg Bid)
    €1617 Keskimäär. tarjous
    22 tarjoukset
    Looking for a PINE coder for TradingView 2 päivää left
    VARMENNETTU

    Im looking to create a private indicator on TradingView. I need a create a multi timeframe alert indicator that can send alert based on multi time frame confirmations

    €154 (Avg Bid)
    €154 Keskimäär. tarjous
    18 tarjoukset

    We are looking for a trading developer with smart contract and DeFi experience. You must have a track record of: - Trading-related development projects (for cryptos, futures, stocks, ETFs, currencies, or options). - Smart contract development projects. - DeFi bot development projects. You must: - Believe in the merits of Test Driven Development, Unit Testing, and CI/CD. - Be fluent in git. - Be able to write and speak in English clearly and fluently. If all of the above describe you accurately, we would love to hear from you. (** no agencies, please **) What is in it for you? You will get a steady stream of exciting and challenging DeFi trading-related development projects to grow your range of skills and experience further. To be considered, you must include answers to the f...

    €20 - €34 / hr
    Mainostettu Sinetöity
    €20 - €34 / hr
    37 tarjoukset
    Full-time blockchain developer 2 päivää left
    VARMENNETTU

    I'm looking for a full-time blockchain developer on a monthly basis.

    €1205 (Avg Bid)
    €1205 Keskimäär. tarjous
    24 tarjoukset

    I have one smart contract of solana token. And need to add features of whitelisting, blacklisting there. I will provide the token information to the experienced developer in rust, solana, smart contract development. Thanks.

    €25 - €49 / hr
    Sinetöity
    €25 - €49 / hr
    28 tarjoukset
    Need blockchain developer 2 päivää left
    VARMENNETTU

    Blockchain network is Solana and ETH. I wish to sell traits and base characters on Solana. But when the user creates their new nft they can choose between ETH or solana. Once they decide which block chain the nft is blocked from the other

    €752 (Avg Bid)
    €752 Keskimäär. tarjous
    21 tarjoukset

    I NEED A CONTENT WRITER FOR MY WEBSITE,MY WEBSITE IS BASED IN NFTs and CRYPTO,need a guy with good knowledge who can write a content

    €155 - €465
    Sinetöity
    €155 - €465
    28 tarjoukset

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