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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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    35 trabajados encontrados, precios en EUR
    Desarrollar Sitio Web PWA -- 2 5 días left
    VERIFICADO

    Necesitamos desarrollar Sitio web en el formato PWA utilizando tecnicas MEAN, el sitio web debera funcionar como tienda en el cual podamos mostrar y vender nuestros productos, requerimientos de proyecto en Archivo Adjunto

    €506 (Avg Bid)
    €506 Oferta Promedio
    26 ofertas

    Hello, I want to understand how can i developp on the Copay app(bitpay) and their Bitcoin Wallet Service! I need a real blockchain expert..

    €157 (Avg Bid)
    €157 Oferta Promedio
    5 ofertas

    I want to build a block chain based web application using react js UI, Which interim implements the smart contracts.

    €278 (Avg Bid)
    €278 Oferta Promedio
    11 ofertas

    Hi- I want to test my network for hyperledger sawtooth and need a script that can be manually configured to run stress testing for hyperledger sawtooth using hyperledger caliper. I want a script like [iniciar sesión para ver URL] (and parameters in front the command) and I give different scenarios to test the sawtooth. please let me know if you can create a documentation and script for usi...

    €146 (Avg Bid)
    €146 Oferta Promedio
    3 ofertas

    I need help putting my custom logo that I have on trustwallet.

    €19 (Avg Bid)
    €19 Oferta Promedio
    11 ofertas

    We are looking for blockchain engineers - front end, back end, on and off chain - to consolidate my idea for NFT marketplace which will be a basis for EverythingStore in the emerging virtual reality space. For the first iteration, we will start with an app for NFT marketplace, putting some creative and IP assets on chain, allowing users to register them and sell and trade them.

    €32 / hr (Avg Bid)
    €32 / hr Oferta Promedio
    28 ofertas
    Build a DaPP 6 días left

    I want to build a certificate issuing and authorising application on a public blockchain.

    €474 (Avg Bid)
    €474 Oferta Promedio
    12 ofertas
    A Blockchain Project 6 días left
    VERIFICADO

    This is a Blockchain Project based on Sia Protocol. Anyone interested can message me to get more info

    €998 (Avg Bid)
    €998 Oferta Promedio
    6 ofertas

    If you are experienced in the blockchain development with Hyperledger Fabric and Nodejs, please apply to this job. When submitting the proposal, including the projects that you have worked with Hyperledger Fabric. I will discuss and share the details with the right candidate. Regards, PS: if you have experience, please answer the following questions. 1. What kind of network in creating network c...

    €508 (Avg Bid)
    €508 Oferta Promedio
    6 ofertas

    If you are experienced in the blockchain development with Hyperledger Fabric and Nodejs, please apply to this job. When submitting the proposal, including the projects that you have worked with Hyperledger Fabric. I will discuss and share the details with the right candidate. Regards,

    €630 (Avg Bid)
    €630 Oferta Promedio
    11 ofertas

    I need someone to integrate trustwallet on my site.

    €157 (Avg Bid)
    €157 Oferta Promedio
    6 ofertas
    Blockchain Explorer -- 2 4 días left
    VERIFICADO

    Hello, we are searching for a skilled developer in order to work on our Blockchain Explorer UI. Please save us time if you are not experienced!

    €179 (Avg Bid)
    €179 Oferta Promedio
    17 ofertas

    I need a Linux OS distribution image for clients, web interface for managing, admin backend, etc. I have my own servers to host it, I also need the code in my github account. I have to be able to add or remove mining softwares on the admin back end, control my customers balance, etc. it has to support both GPU and CPU mining simultaneously.

    €999 (Avg Bid)
    €999 Oferta Promedio
    9 ofertas
    Help me build a PVIX fork 3 días left
    VERIFICADO

    Need someone who is able to write me a good tutorial of forking PVIX coin ! I don't want you to build the fork and give it to me. I wan't you to show me or write me each steps.

    €448 (Avg Bid)
    €448 Oferta Promedio
    6 ofertas

    Hi, I looking for the best inovation solutions in blockchain for e- commerce. Pls contact on priv.

    €249 (Avg Bid)
    €249 Oferta Promedio
    10 ofertas
    build mining pool 3 días left

    I need someone to help me setup my own mining pool, preferably Yiimp

    €195 (Avg Bid)
    €195 Oferta Promedio
    3 ofertas

    I need you to develop some software for me. I would like blockchain network with multiple nodes software to be developed for Windows using Python.

    €11 (Avg Bid)
    €11 Oferta Promedio
    2 ofertas

    Olá, Ficamos felizes que você tenha se interessado pelo nosso projeto. Abaixo listamos algumas necessidades que consideramos essenciais para a contratação do freelancer e um pouco sobre o que será necessário. Necessitamos de 4 relatórios mensais, sendo 1 por semana. A boa noticia é que o freelancer terá serviço recorrente to...

    €148 (Avg Bid)
    €148 Oferta Promedio
    3 ofertas

    I have a token called H3D (solidity smart contract). Whenever someone buys or sells H3D through our site ([iniciar sesión para ver URL]), 10% of the purchase (in HEX, what people use to buy H3D) is distributed amongst the token holders. The value of H3D goes up as more people buy, and down when people sell. We launched and all was well, but someone discovered a bug that allowed one of the d...

    €499 (Avg Bid)
    €499 Oferta Promedio
    14 ofertas

    Looking for experienced developer related to Hash betting game. Exiting similar this gaming platform Using this based on [iniciar sesión para ver URL] ,, i want to change some design and function. And need to check debug for games. [iniciar sesión para ver URL] [iniciar sesión para ver URL]

    €1002 (Avg Bid)
    €1002 Oferta Promedio
    11 ofertas

    Needs to hire 3 Freelancers We are looking for experienced trainers to deliver 1 x day workshops in different IT technologies: * IT Security * Cybersecurity * Network Security * Azure Cloud * Blockchain * Artificial Intelligence * Penetration Testing Preferred Timezone - Middle East, Africa, APAC, Australia, Newzealand You will be asked to answer the following questions when submitting a propo...

    €25 / hr (Avg Bid)
    €25 / hr Oferta Promedio
    13 ofertas

    [iniciar sesión para ver URL] address [iniciar sesión para ver URL] [iniciar sesión para ver URL] project requirements According to the official code, to optimize the efficiency of the block encapsulation code, you need to compile in go language. Anyone familiar with go language and rust can contact me.

    €268 (Avg Bid)
    €268 Oferta Promedio
    10 ofertas

    I need ethereum web3j app in android or a java class that can do the function: 1. Create Account (Public address and Private Key) 2. Erc20 Send transaction 3. Ethereum send transaction 4. Get balance 5. Should be in mainet connection in infura Refrence link : [iniciar sesión para ver URL] and [iniciar sesión para ver URL] Only freelancer that has experience on it are allowed ...

    €256 (Avg Bid)
    €256 Oferta Promedio
    4 ofertas

    Hello, we are searching for a copywriter/content writer who can add content (fill blanks) on our new website in English. Our website is cryptocurrency-related, so you need to know basic stuff about Bitcoins and blockchain. DO NOT apply if you have no knowledge about this topic. Please send any previous work you had on this topic. Website content is about 3000 words long but may increase a little. ...

    €482 (Avg Bid)
    €482 Oferta Promedio
    27 ofertas
    PIVX blockchain expert 1 día left
    VERIFICADO

    Hi, we are willing to complete our Blockchain team so please make sure you are familiar with Dash and the fork PIVX.

    €540 (Avg Bid)
    €540 Oferta Promedio
    18 ofertas

    Hello, I'm currently working on an altcoin which is a fork of Blackcoin and we need some electrum servers to be setup for our coin. The algorithm is Scrypt. We'll ask you the following for this work. - Create a new Electrumx implementation supporting our coin @ digitalocean cloud - Test the implementation with us. - A guide to run the server. (start, restart, maintenance) - Allow us an...

    €441 (Avg Bid)
    €441 Oferta Promedio
    14 ofertas

    DASH fork needed --- just a new coin with different reward system

    €547 (Avg Bid)
    €547 Oferta Promedio
    18 ofertas

    I would like to build a faucet site that pays HEX every week. I'm after a clean interface, the site style will be built in a similar way to http://hex.toys. total deadline: $500

    €107 / hr (Avg Bid)
    €107 / hr Oferta Promedio
    14 ofertas
    BLOCKCHAIN API (RBF FIX) 1 día left
    VERIFICADO

    Hello Everyone, We are using blockchain as our payment service but blockchain doesn't support RBF i.e Replace by fee So our system is vulnerable to double spend attack or 51% attack Well , we have prevented it using minimum one confirmation for lower amounts But for one confirmation sometimes it takes 1-2 hrs. We want to let user balance auto update as they pay to address but by checking...

    €523 (Avg Bid)
    €523 Oferta Promedio
    2 ofertas
    Ethereum Web3j java android app 1 día left
    VERIFICADO

    I need ethereum web3j app in android or a java class that can do the function: 1. Create Account (Public address and Private Key) 2. Erc20 Send transaction 3. Ethereum send transaction 4. Get balance 5. Should be in mainet connection in infura Refrence link : [iniciar sesión para ver URL] and [iniciar sesión para ver URL] Only freelancer that has experience on it are allowed ...

    €144 (Avg Bid)
    €144 Oferta Promedio
    3 ofertas

    Hello! I'm looking for a BEST Wordpress developer! We have about 90 pages of ppt web development plan. (with Mainpage, Subpage design) And we want this function 1. A system that, like FIVERR, allows a seller to enter and sell the copyrights that the seller wants to sell. [iniciar sesión para ver URL] payment system (both sellers and buyers check the month of use, a period of use, etc....

    €795 (Avg Bid)
    €795 Oferta Promedio
    18 ofertas

    Using computer and vision and machine learning, verify the validity and quality of video transcoding with H264 without having to re-do the transcoding. Requirements: * Deep understanding of video transcoding workflows * Familiarity with signal processing techniques * Familiarity with video quality measurements such as SSIM, PSNR and VMAF * Has prior experience in security and/or cryptography * Is...

    €46 / hr (Avg Bid)
    €46 / hr Oferta Promedio
    9 ofertas

    We have a protocol developed in Solidity. This protocol has a relayer module which processes the transaction without taking gas fee in ETH from the users. Fee for the transaction is paid by relayer and once the transaction is processed, ETH is refunded to the relayer. We would like to add a method that will refund the fee in ERC20 token as well. Implementation is based on [iniciar sesión ...

    €435 (Avg Bid)
    €435 Oferta Promedio
    4 ofertas

    Looking for a blockchain developer for setting up Trust Wallet at my server. Further work will be assigned after successful completion of the wallet.

    €97 (Avg Bid)
    €97 Oferta Promedio
    4 ofertas

    I want a programme I can run on a DigitalOcean server that uses Twitter's API to monitor accounts I specify by username. When the user I specify tweets or re-tweets, the programme should send a transaction on the Ethereum blockchain from one address to another, with the text of the tweet (as hexadecimal) as the 'Input Data'.

    €237 (Avg Bid)
    €237 Oferta Promedio
    6 ofertas