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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    I want to add a pool on my website for gathering computing power of multiple users and work on same task.

    €107 (Avg Bid)
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    2 offres

    Hello, What I'm looking for is something like an ICO payment page, a page that works like this: 1) A form where user insert ERC-20 token address and amount, then button "Continue" 2) Pressing "Continue", will appear on screen the amount that need to be paid in ETH based on the exchange rate owner decide for the token and the address where ETH has to be sent 3) After ETH pa...

    €509 (Avg Bid)
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    12 offres
    Block chain 6 jours left
    VERIFIÉ

    Want to create new crypto currency reparation goal need someone to be able to also write a smart contract for its and also wanted to be based on investors obviously

    €1700 (Avg Bid)
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    24 offres

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

    €1085 (Avg Bid)
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    16 offres
    Blockchain Expert Needed 5 jours left
    VERIFIÉ

    seeking a blockchain developer. Please feel free to contact me.

    €1122 (Avg Bid)
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    24 offres
    Crypto CD Art 5 jours left

    What is Crypto CVD Art? Crypto CVD Art is a marketplace of unique and rare stickers all over the world. Born from the idea of ​​the Coronovirus pandemic, it wants to bring more unique than rare collectibles in your homes. Nice collectibles with different types of rarity will be the result of a fantastic and accurate selection model. Based on the Etherum blockchain, it allows you to buy and rese...

    €562 (Avg Bid)
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    8 offres

    Developer needed to alter some aspects of a HLF1.4+ instance that will house music and track file usage.

    €1076 (Avg Bid)
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    15 offres

    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..

    €230 (Avg Bid)
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    8 offres

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

    €394 (Avg Bid)
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    16 offres

    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 [se connecter pour voir l'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 usin...

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    4 offres

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

    €19 (Avg Bid)
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    11 offres

    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)
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    34 offres
    Build a DaPP 3 jours left

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

    €511 (Avg Bid)
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    15 offres
    A Blockchain Project 3 jours left
    VERIFIÉ

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

    €911 (Avg Bid)
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    7 offres

    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...

    €527 (Avg Bid)
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    7 offres
    Desarrollar Sitio Web PWA -- 2 3 jours left
    VERIFIÉ

    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

    €498 (Avg Bid)
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    27 offres

    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,

    €609 (Avg Bid)
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    12 offres
    Blockchain Explorer -- 2 2 jours left
    VERIFIÉ

    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!

    €180 (Avg Bid)
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    16 offres
    Help me build a PVIX fork 1 jour left
    VERIFIÉ

    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.

    €369 (Avg Bid)
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    8 offres

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

    €247 (Avg Bid)
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    10 offres
    build mining pool 12 heures left

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

    €140 (Avg Bid)
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    5 offres

    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.

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    2 offres

    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...

    €155 (Avg Bid)
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    4 offres

    I have a token called H3D (solidity smart contract). Whenever someone buys or sells H3D through our site ([se connecter pour voir l'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 de...

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    14 offres

    Looking for experienced developer related to Hash betting game. Exiting similar this gaming platform Using this based on [se connecter pour voir l'URL] ,, i want to change some design and function. And need to check debug for games. [se connecter pour voir l'URL] [se connecter pour voir l'URL]

    €946 (Avg Bid)
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    12 offres

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