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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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    30 trabajados encontrados, precios en USD

    I want to build a game on the Ethereum blockchain, I am looking for someone who can build the front end of the website, the game is going to have a world map, some territories, objectives, dices, troops

    $585 (Avg Bid)
    $585 Oferta Promedio
    7 ofertas

    hello, I want to build a system with medical recording on a blockchain platform

    $1652 (Avg Bid)
    $1652 Oferta Promedio
    27 ofertas

    Hi, I transferred some of BCH from wallet A to wallet B. Then from wallet B, I transferred some BCH to Kraken and Binance. But I can't do the split with Kraken and Binance after I did accidently do the transaction of transferring BCH from wallet A to wallet B prior. Kraken and Binance were not detecting deposit of BSV. They only detected deposit BCH. Also I did try with Exodus and Coinomi w...

    $225 (Avg Bid)
    $225 Oferta Promedio
    3 ofertas

    Requires extensive knowledge of C++, Blockchain and Proof of Stakes Restful APIs ( read the stream of data from exchanges APIs) Qt development Providing Solution base on requirements ........... Do not apply if your an agency Candidates must provide evidence of previous contributions on developing proof of stake concepts for c++ open source blockchain projects on Github.

    $1411 (Avg Bid)
    $1411 Oferta Promedio
    11 ofertas

    I m looking for a PHP/JS script web developer that can complete my urgent project. Only expert bid here

    $20 / hr (Avg Bid)
    $20 / hr Oferta Promedio
    74 ofertas

    I need an arbitrage TELEGRAM bot just the bot interface not the arbitrage software I already have the software a full example is below [iniciar sesión para ver URL] Telegram interface should accept BTC / LTC / ETH. The most important part is you deploying the bot for me and showing me how it will work with how you have designed it.

    $160 (Avg Bid)
    $160 Oferta Promedio
    5 ofertas
    Mobile Wallet Developer Required 5 días left
    VERIFICADO

    I want someone who can build a mobile Ethereum wallet and web3 dapp browser like Cipher Browser. You can use the Ethereum Library from [iniciar sesión para ver URL] I need the apps for IOS and Android. Please bid only if you understand what I need.

    $285 (Avg Bid)
    $285 Oferta Promedio
    10 ofertas

    Sample exchange :: [iniciar sesión para ver URL], with the following features like investbox, dice, freecoins.

    $1922 (Avg Bid)
    $1922 Oferta Promedio
    15 ofertas

    Hello, This is not for a dapp based blockchain network and crypto coin development but for a private network and private coin. We need a blockchain platform for a testing purpose. It goes like as below.( we welcome any developer who wants to test his/her technical experiments in our testing project) 1. One website with only 2 pages which is almost empty(because this is all for the testing pur...

    $549 (Avg Bid)
    $549 Oferta Promedio
    13 ofertas
    Blockchain Dapp Development 4 días left
    VERIFICADO

    I would like to create a dapp using Neblio Blockchain testnet to do this, please let me know proposals or any Dapp projects you have worked on in the past.

    $35 / hr (Avg Bid)
    $35 / hr Oferta Promedio
    35 ofertas

    The aim of this task is not to cause any damage, rather demonstrate that 51% technique can be carried out on low hashing coins. The project involves carrying out a 51% technique on PoW. The URL below is exactly what to be done for this task and instructs how to carry out a 51% technique successfully. [iniciar sesión para ver URL] Your job will be; 1. Go through the URL and understand ...

    $44 (Avg Bid)
    $44 Oferta Promedio
    2 ofertas

    I have small task for experienced Qt developer. Must be have Qt developing environment on ubuntu OS. Prefer have knowledge of blockchain.

    $55 (Avg Bid)
    $55 Oferta Promedio
    3 ofertas

    I need a professional blockchain developer who can work with us on our blockchain based project/application, you must have a good LinkedIn profile. Any alumni of Stanford or havard University is preferred or a great work experience in company like IBM or so on is preferred.

    $608 (Avg Bid)
    $608 Oferta Promedio
    4 ofertas
    I A M - Block Chain 3 días left
    VERIFICADO

    Identity And Access Management. User can connect all the utilities / loyalty programs and transactions through his account. User can enable / disable / restrict the access of his private-data sharing. Transaction history payment gateways linking Wallets linking

    $6 / hr (Avg Bid)
    $6 / hr Oferta Promedio
    1 ofertas

    We want to make a pilot project and adopt a tokenexchange for enterprise use. Our aim is to evaluate and learn how this goes and need developers who are understanding ICO/STO and can helpnusbwith building a reference token exchange to experiment with and develop it into a future rral project. Scope: identify open source projects to start with. Help with branding hardening and implementing UI Templ...

    $29 / hr (Avg Bid)
    $29 / hr Oferta Promedio
    37 ofertas
    Blockchain Security 51% Technique 3 días left
    VERIFICADO

    The aim of this task is not to cause any damage, rather demonstrate that 51% technique can be carried out on low hashing coins. The project involves carrying out a 51% technique on PoW. The URL below instructs how to carry out the this technique successfully. [iniciar sesión para ver URL] Your job will be; 1. Go through the url and understand what is expected. 2. Choose a low hashing...

    $26 (Avg Bid)
    $26 Oferta Promedio
    4 ofertas

    Existing Ruby on rails virtual currency web application needs customisation to incorporate bitcoin and and ethereum wallet capabilities for users.

    $160 (Avg Bid)
    $160 Oferta Promedio
    5 ofertas
    c++ expert needed 3 días left

    i m looking for c++ programmer who have blockchian skills , only apply if you are expert in this area.

    $20 / hr (Avg Bid)
    $20 / hr Oferta Promedio
    9 ofertas

    Professional look of Dex like:- [iniciar sesión para ver URL] All token support of Eth and neo BlockChain Example of exchange :- [iniciar sesión para ver URL] [iniciar sesión para ver URL] [iniciar sesión para ver URL] Let me know if you can help

    $5975 (Avg Bid)
    $5975 Oferta Promedio
    3 ofertas

    ◆ About the item It becomes customization of Ethereum's main chain. ◆ Overview ・ Fixing critical issues (below), incorporating ※ As for the amount of work, it seems to be one to several days. ◆ problem 1. Important issues ・ SafeMath library was not used In transfer / transferFrom function, overflow may occur, It can lead to the loss of all funds 2. Minor issues ・ Constructor name remains d...

    $355 (Avg Bid)
    $355 Oferta Promedio
    7 ofertas

    I m looking for full stack js guy who can complete my project, blockchain knowledge, block explorer skills and api skills needed. Only expert bid here

    $9 / hr (Avg Bid)
    $9 / hr Oferta Promedio
    18 ofertas

    Ongoing position, full time. Can you keep track of 198 moving tasks in your head? Not only that, you know which task has to be done before another, what are the tradeoffs of doing one before another, who is more fit to do each task, while making sure everyone is working on something important. And when asked, you can respond within 0.1 seconds, "yup, that will be done by 9:59 PM today&quo...

    $24 / hr (Avg Bid)
    $24 / hr Oferta Promedio
    21 ofertas
    Blockchain Prototype 2 días left
    VERIFICADO

    We need (1) consultancy service; and (2) prototype development for a Blockchain project. It is not a full fledged platform, it is more a prototype, or a demo version of the platform. The project should include the research covering conceptual and technical aspects, and a prototype to show implementation. The paltform should be desinged for charitable organization to receive/spend funds.

    $4377 (Avg Bid)
    $4377 Oferta Promedio
    45 ofertas

    Hello, we're looking for a Ruby on Rails developer to work on the back-end of a cryptocurrency exchange. You'll join a team of 3 Ruby on Rails developers, follow the main developer instructions and work on the API part of the application. The front-end is done by another developers in React/Redux. You must know the best practices and be able to give advices on developments. Please det...

    $27 / hr (Avg Bid)
    $27 / hr Oferta Promedio
    54 ofertas
    Switching a testnet to mainnet 2 días left
    VERIFICADO

    We are running our blockchain on testnet and we are ready to make the switch into mainnet. We are looking for blockchain developers which can help us to make the switch and test it to see if all works well. The blockchain is bitcoin based and integrated with masternodes.

    $1226 (Avg Bid)
    $1226 Oferta Promedio
    23 ofertas

    Need a software which can generate unconfirmed Bitcoin transaction without having any Bitcoins in the wallet. Needs to appear to send bitcoins

    $513 (Avg Bid)
    $513 Oferta Promedio
    9 ofertas

    I need a professional blockchain developer who can develop blockchain based apps (DAPPs) ....

    $267 (Avg Bid)
    $267 Oferta Promedio
    7 ofertas

    I want to make a script to be able to backtest the profits of buying a basket of cryptocurrencies or index. You must be able to choose start date and end of the backtest, choose between independent currencies or an index such as the top 10 (per marketcap) top 30, top 50, top 100 .... that includes coins that enter and leave the index daily. It must be possible to enter and take into account the e...

    $474 (Avg Bid)
    $474 Oferta Promedio
    7 ofertas
    Blockchain Article -- 2 22 horas left
    VERIFICADO

    Hi, I need someone who can write about Blockchain technology. I would prefer Blockchain Developer to work on this as I want the latest happening in the Blockchain world.

    $4 / hr (Avg Bid)
    $4 / hr Oferta Promedio
    12 ofertas
    Blockchain and economic writer 11 horas left
    VERIFICADO

    Hello I am looking for a very good writer that write very well about cryptocurrency and financial markets. Please be professional and savvy.

    $309 (Avg Bid)
    $309 Oferta Promedio
    52 ofertas