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.

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    writing code for a cryptocurrency

    €41 (Avg Bid)
    €41 Průměr. nabídka
    16 nabídky
    build a solidity/web3 script 6 dní left
    OVĚŘENÉ

    write nodeJS script that would retreive specific information from blockchain

    €391 (Avg Bid)
    €391 Průměr. nabídka
    53 nabídky

    i have a python script IT requires cplex to run it . I want alternate open source software to run the script and edit script for that alternate software if required.

    €15 / hr (Avg Bid)
    €15 / hr Průměr. nabídka
    11 nabídky
    Setup Open sea clone script 6 dní left
    OVĚŘENÉ

    Setup Open sea script marketplace site

    €1213 (Avg Bid)
    €1213 Průměr. nabídka
    37 nabídky
    Blockchain Developer 6 dní left
    OVĚŘENÉ

    We are working on a startup project to build a professional network verified on the blockchain similar to and create a token just like they did here Let me know if you have built similar Dapps and tokens before. Also, check the reference site and let me know how that was created on the blockchain.

    €4458 (Avg Bid)
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    24 nabídky

    Hi I have developed smart contract (partially done) need someone to adjust it and then update the whole thing. please message me so I can send you what's done and you can assess real cost of project

    €390 (Avg Bid)
    €390 Průměr. nabídka
    57 nabídky
    Solana Crypto Poker Site 6 dní left
    OVĚŘENÉ

    Looking for experienced developer who can build a multiplayer poker game for Solana (Phantom wallet). Must be capable of doing both front and back end for the project within reasonable time. Experience is not optional.

    €2586 (Avg Bid)
    €2586 Průměr. nabídka
    65 nabídky

    We want to make a network marketing plan where we have to use dApp like tronlink pro or trust wallet and metamask. Experienced developers needed.

    €322 (Avg Bid)
    €322 Průměr. nabídka
    15 nabídky
    Crash Game For Solana -- 2 6 dní left
    OVĚŘENÉ

    Looking for full stack blockchain pro who can develop a game of Crash for me, you must have connections to design and build everything from A to Z, design and front end included. We have images/references of how we want it to look, but you must do the rest. We have open source Crash script too, time wasters will be ignored.

    €2623 (Avg Bid)
    €2623 Průměr. nabídka
    70 nabídky

    Looking for someone to edit a codecanyon script that currently supports metamask only, need it to support Phantom wallet (solana ecosystem) its made in react. please have experience.

    €538 (Avg Bid)
    €538 Průměr. nabídka
    50 nabídky
    Bitcoin Flash Tutorial -- 3 6 dní left
    OVĚŘENÉ

    Just $1000 for 3 days! 1. checking softare quality $500 2. after push codebase $500. I need someone to teach me how to make a bitcoin flash transaction or give me the software for it . It means that you can send a fake bitcoin transaction to a wallet , it would not get validated like you cannot spend it , but it would get 1 or 2 confirmations , therefore showing it in your wallet . If you know how to do it and what I am talking about , please dm . DO NOT PROPOSE IF YOU DO NOT KNOW WHAT THIS IS ABOUT . I WANT PROOF FIRST .

    €1001 (Avg Bid)
    €1001 Průměr. nabídka
    16 nabídky
    Build a Website frontend 6 dní left
    OVĚŘENÉ

    Looking for a website developer to build a website front end. It will consist of a few pages and a few basic functions. In the future it will be used as the front end to connect to the ethereum blockchain and other blockchains/dapps. Initially though I am looking for more of a landing page to showcase the front end and what potential functions that this website will able to do. This is so i can attract interest in my project then down the timeline i can take the next step in making the front end connect with the back end. The website i want built will be a combination of and I will detail what content i want on the website. The buttons and links on the front end dont have to work yet as discussed above this is just a display website initially. You will need to understand blockcha...

    €405 (Avg Bid)
    €405 Průměr. nabídka
    106 nabídky
    NFT minting bot on ETH network 6 dní left
    OVĚŘENÉ

    I need a minting flash, create one on the Javascript language. Mint NFTS automatically.

    €265 (Avg Bid)
    €265 Průměr. nabídka
    41 nabídky
    Flutter Developers 6 dní left
    OVĚŘENÉ

    Looking for flutter developers to join our crypto team, all experience levels needed.

    €20 (Avg Bid)
    €20 Průměr. nabídka
    30 nabídky

    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 :

    €17 (Avg Bid)
    €17 Průměr. nabídka
    9 nabídky
    Bitcoin / Other Crypto Mining 6 dní left
    OVĚŘENÉ

    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.

    €501 (Avg Bid)
    €501 Průměr. nabídka
    39 nabídky

    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

    €345 (Avg Bid)
    €345 Průměr. nabídka
    6 nabídky

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

    €578 (Avg Bid)
    €578 Průměr. nabídka
    23 nabídky
    Blockchain Developer for Games 5 dní left
    OVĚŘENÉ

    Hi I am developing a game on block chain. Need a very experienced blockchain developer for back end integration on Binance or ethereum

    €858 (Avg Bid)
    €858 Průměr. nabídka
    58 nabídky

    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

    €177 (Avg Bid)
    €177 Průměr. nabídka
    18 nabídky

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

    €14 / hr (Avg Bid)
    €14 / hr Průměr. nabídka
    9 nabídky

    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 Průměr. nabídka
    35 nabídky

    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

    €2948 (Avg Bid)
    €2948 Průměr. nabídka
    11 nabídky

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

    €35 / hr (Avg Bid)
    €35 / hr Průměr. nabídka
    19 nabídky

    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...

    €3966 (Avg Bid)
    €3966 Průměr. nabídka
    34 nabídky

    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

    €115 (Avg Bid)
    €115 Průměr. nabídka
    10 nabídky

    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 Průměr. nabídka
    55 nabídky
    Crypto Flashing bot 4 dní left
    OVĚŘENÉ

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

    €224 (Avg Bid)
    €224 Průměr. nabídka
    31 nabídky

    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...

    €4879 (Avg Bid)
    €4879 Průměr. nabídka
    26 nabídky
    Rust backend developer 4 dní left
    OVĚŘENÉ

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

    €89 (Avg Bid)
    €89 Průměr. nabídka
    7 nabídky

    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 Průměr. nabídka
    40 nabídky
    Technical document writer 3 dní left
    OVĚŘENÉ

    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 Průměr. nabídka
    19 nabídky

    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!

    €648 (Avg Bid)
    €648 Průměr. nabídka
    55 nabídky

    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.

    €37 / hr (Avg Bid)
    €37 / hr Průměr. nabídka
    15 nabídky

    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 Průměr. nabídka
    5 nabídky

    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 Průměr. nabídka
    6 nabídky

    Hello, I need an NFT Game developer

    €4516 (Avg Bid)
    €4516 Průměr. nabídka
    25 nabídky
    Blockchain Developer 3 dní left
    OVĚŘENÉ

    We are expecting blockchain developer to develop our own concept,

    €578 (Avg Bid)
    €578 Průměr. nabídka
    13 nabídky

    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.

    €564 (Avg Bid)
    €564 Průměr. nabídka
    14 nabídky
    Need a nft marketplace 3 dní left
    OVĚŘENÉ

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

    €2710 (Avg Bid)
    €2710 Průměr. nabídka
    41 nabídky

    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.

    €536 (Avg Bid)
    €536 Průměr. nabídka
    22 nabídky

    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

    €746 (Avg Bid)
    €746 Průměr. nabídka
    23 nabídky

    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 Průměr. nabídka
    43 nabídky

    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 Průměr. nabídka
    8 nabídky

    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...

    €1779 (Avg Bid)
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    13 nabídky
    Real Estate Blockchain APP 2 dní left
    OVĚŘENÉ

    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...

    €148 / hr (Avg Bid)
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    This is a bootstrapped startup with potential to scale rapidly. Experience and passion for blockchain, smart contracts, Dapp, DAO required.

    €2514 (Avg Bid)
    Doporučené
    €2514 Průměr. nabídka
    76 nabídky

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

    €1316 (Avg Bid)
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    28 nabídky

    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

    €580 (Avg Bid)
    €580 Průměr. nabídka
    52 nabídky
    ICO development 2 dní 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.

    €645 (Avg Bid)
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