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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    looking for blockchian developer (must be familar with bcoin.io) 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    hi looking for someone who is familiar bcoin and [увійдіть, щоб побачити URL] we want to develop something similar to it you must be familiar with bcoin repo and you must familiar with blockchain

    $750 (Avg Bid)
    Угода про нерозголошення
    $750 Сер. заявка
    3 заявки

    Need a blockchain developer/consultant to add blockchain technology to our Workforce Management App.

    $46 / hr (Avg Bid)
    $46 / hr Сер. заявка
    7 заявки
    I need to consume this product's API - hash - blockchains 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    I need to consume this product's API The Web Content Authenticity Test solution makes a complete copy of the content being viewed in your browser and generates a proven report on its existence. It is possible to register an authenticity of content published on the web, whether on websites, blogs, social media or portals. In addition, from the report generated by the plug-in, a hash is create...

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    We need a developer who can create api ipn system for blockcypher to accept bitcoin and ethereum on our [увійдіть, щоб побачити URL] is to generate address for btc and eth and fetching payment with [увійдіть, щоб побачити URL] should be in php

    $85 (Avg Bid)
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    Blockchain Expert Need 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    Hello. Here is an old hotel management app. I want to develop a new web app that is similar with this app. The old app was developed with C# and it runs on only Windows. ... Please check this link. [увійдіть, щоб побачити URL] If you are an expert, let me know. Thanks

    $1199 (Avg Bid)
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    18 заявки
    API to transfer eth tokens from one wallet to another 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    I need an API to transfer Eth from one Main wallet to many different wallets and also to transfer Token balances from many wallets to one Main wallet.

    $625 (Avg Bid)
    $625 Сер. заявка
    10 заявки

    What say ye. (dydx fork) Front end curates what contracts represent what pairs. Just like Uniswap does now. Users can paste in contract addresses, just like uni does now. Fast deploy. 1. Remove the secret key. 2. Use the dangerous uniswapV1 HEX/ETH for oracle. People will be warned that the price is easier to manipulate up or down, and will be improved in v2. 3. Launch. 4. Fork for HEX/USDC pai...

    $8611 (Avg Bid)
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    9 заявки
    PHP Hyperledger Fabric integration 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    Upload data from php laravel and storing it to Hyperledger Fabric blockchain. Display blockchain history in PHP web.

    $141 (Avg Bid)
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    7 заявки

    Build a blockchain app to share Training certificate information on Blockchain (Ethereum or Algorand). Functionalities: - Issue certificate on blockchain - Verifiy Cerificate Development: - Token development - UI Web development - Testing

    $643 (Avg Bid)
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    13 заявки
    Blockchain Explorer 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    Hello, we are searching for a skilled developer in order to work on our Blockchain Explorer.

    $179 (Avg Bid)
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    13 заявки
    Need Private Key Hex to Bitcoin address web base software 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    We need Private Key Hex to Bitcoin address web base software or standalone software which is converting hex number to private key hex and bitcoin address. like as [увійдіть, щоб побачити URL] In an application, we enter the range of hex number like 1 to 1000 and so on and gives us Private Key Hex in WIF format in txt file. For more information check attached file

    $20 (Avg Bid)
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    1 заявки
    Help me trade bitcoin 6 дні(-в) left

    I need someone who is experienced with bitcoin trading (preferably from the UK) to guide me and help me trade BITCOIN.

    $2760 (Avg Bid)
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    7 заявки
    I need an investment app 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    I need an Android app. where users can make deposits and earn daily rewards or interest to their account based on their deposits

    $466 (Avg Bid)
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    17 заявки
    Hotel app + Bitcoin -- 2 5 дні(-в) left

    Hello. There is a hotel management app. I want to integrate Bitcoin payments into this app. Check the following URL. If you are proficient in blockchain technology and can realize Bitcoin payments, we will pay. More information will be shared through charting. [увійдіть, щоб побачити URL]

    $1208 (Avg Bid)
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    18 заявки

    Hi, I am Michalis Agapiou, CEO of Syndeseas Integrated Solutions Ltd a Cyprus based startup. We have a diverse team of Naval Architects and IT experts managing our own integrated software for ships fuel & emissions monitoring, reporting and verification regulatory compliance and performance optimization. We are looking to upgrade our software by utilizing blockchain and we are searching for re...

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    25 заявки
    Blockchain/gps/banking 5 дні(-в) left
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    I am looking for an app developer to create an app which combines data from satellite and geo-tagging. With a user interface built on blockchain. Each user will have a profile on which they can bank geotags.

    $1681 (Avg Bid)
    Угода про нерозголошення
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    20 заявки
    GraphQL server & query setup -- 2 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    I am looking for someone to help me with setting up a GraphQL server on a VPS i have which is currently running a rest api server for a chain. I have forked this project [увійдіть, щоб побачити URL] and because I am modifying it to run on a different chain, we need to create graphql backend for it to query. - Fork & Install the bitsong explorer with all npm modules it requires. - Fork &...

    $79 (Avg Bid)
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    6 заявки
    BITCOIN advanced development courses 5 дні(-в) left
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    I need online lessons from who is master of Bitcoin coding guru . - Creating wallet and securing them - Bitcoin mainnet transactions tracking - wallets balance tracking ( unspent BTC ) - secp256k1 - private keys - multiple signature - advanced security - NodeJS uses - Like that other details

    $248 (Avg Bid)
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    TALENTED BLOCKCHAIN ETHEREUM DEVELOPERS REQUIRED 5 дні(-в) left
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    1. We are in urgent need of Blockchain Ethereum Developers specializing in Golang with a minimum of 5 years experience. 2. Candidates should extensive knowledge of concepts pertaining to the same. 3. Hiring is for a long term project. 4. Apply only if your have the desired experience in the mentioned technology. 5. Candidates need to share their work portfolio in Blockchain-Ethereum to take this f...

    $2325 (Avg Bid)
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    Bitcoin/ Crypto eCommerce Website 4 дні(-в) left
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    I’m looking for a proof of concept website where people can buy PDFs via bitcoin. 1. They can enter their details such as name, email, etc. 2. We show them a QR code with the bitcoin address. 3. When payment has been validated, we send them an email with the PDF. Design isn’t important. This is just a proof of concept.

    $110 (Avg Bid)
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    3 заявки

    I'm looking for a developer who have experience working with IPFS/Skynet or BTFS. My goal is to customize a decentralized video streaming website based off of [увійдіть, щоб побачити URL] (which is built with Meteor and available on [увійдіть, щоб побачити URL]), and customize it to load videos from my own servers. Currently, [увійдіть, щоб побачити URL] loads videos from [увійдіть, щоб по...

    $55 / hr (Avg Bid)
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    16 заявки
    Ride sharing app 4 дні(-в) left
    ПІДТВЕРДЖЕНО

    Looking for a dev who can developed a ride developed a ride sharing app with basic functions like Distance calculation between driver and passenger using google API Price estimation Accept & cancel rides Wallet balance

    $1478 (Avg Bid)
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    68 заявки
    Need Blockchain developer 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    *CANDIDATES FROM KARNATAKA OR TAMIL NADU PREFERRED Good experience in ethereum Knowledge in Golang, Apollo GraphQL

    $1185 (Avg Bid)
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    10 заявки
    Develop Cryptocurrency -- 2 3 дні(-в) left
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    This project is to develop a BTC fork cryptocurrency. Must have extensive experience with cryptocurrencies and blockchain development. Complete delivery in up to 6 days.

    $310 (Avg Bid)
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    13 заявки
    Online auction 3 дні(-в) left

    its an online auction system based on blockchain. Its complete in that aspect ,what I want is to add some encyption algorthim to my existing code to make it more secure.

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    4 заявки
    Hyperledger Indy 2 дні(-в) left

    We require a team of 4 people to work on a blockchain project. The timeline for the project is 45 days. We would prefer full stack developers.

    $14808 (Avg Bid)
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    Add asicboost on yiimp stratum 2 дні(-в) left
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    Hello, I own a pool for personal use and I would like to add asicboost on my stratum server. I know stratum source and if possible I prefer to have modified source code with explanation Also a good addition will be equihash algo. Regards Zagorxx

    $404 (Avg Bid)
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    Build me an application 1 день left
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    I am looking for a developer to build a simple application using the [увійдіть, щоб побачити URL] API. More details will be discussed with selected developers only.

    $339 (Avg Bid)
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    12 заявки
    Issue with HLF Hyper Ledger Fabric performance and error 1 день left
    ПІДТВЕРДЖЕНО

    Hi there, I have a hyper ledger fabric network with 2 nodes, 6 peers. The system works until I got a lot of transactions loaded. I need someone who can review the code and tell me what is the issue. potentially also to fix the issue after the analysis. This is just to provide feedback of the solution. Thanks Fed

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    Crypto based Binary MLM needed ... Readymade Only 1 день left
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    Only readymade binary mlm platform needed which is crypto based and it must be easy to use and scalable. Show me the demo with admin. Thanks

    $321 (Avg Bid)
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    ICO for real estate project 1 день left
    ПІДТВЕРДЖЕНО

    The project consists of developing an ICO from scratch for a real estate project. It is about creating a cryptocurrency with Ethereum and making it public. The website must allow the exchange of the token with bitcoin and ethereum. The public offer will last 3 months. I need the web system and cryptocurrency to develop. But also list it in coinmarketcap and in some exchange. Each cryptocurrency ...

    $4859 (Avg Bid)
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    Rehive custome intergration 1 день left
    ПІДТВЕРДЖЕНО

    Looking for a dev who can work with our present developers and successfully intergrate a few features from Rehive

    $529 (Avg Bid)
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    6 заявки
    Blockchain Certificate System 21 годин(-и) left
    ПІДТВЕРДЖЕНО

    Hi, We are looking to build blockchain online certificates system, where school can load it and user can view it. Preferably, in Hyperledger Sawtooth or EVM+IPFS. Please share your past similar project example and estimated timeline & cost for this. Thanks.

    $1900 (Avg Bid)
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    24 заявки
    iqoptions type trading app needed Readymade Only 19 годин(-и) left
    ПІДТВЕРДЖЕНО

    If someone has already developed Options Trading Mobile app similar to iqoptions, i will hire you immediately. Only with live demo of admin and user froentend. Thanks

    $35071 (Avg Bid)
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    Crypto margins trading developer 16 годин(-и) left
    ПІДТВЕРДЖЕНО

    Looking for developer to developer crypto margins trading developer like [увійдіть, щоб побачити URL] more info in chat

    $37 / hr (Avg Bid)
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    27 заявки
    Build Smart contract with Hyper-ledger for Healthcare 8 годин(-и) left
    ПІДТВЕРДЖЕНО

    Looking for a Sr expert smart contract builder for the Hyper ledger blockchain. The project is to convert “PDF” contract that has some rules to smart contract. The current contract consists of static legal verbiage and a section of table rules. Candidate must be Sr expert in Smart contract for hyper ledger blockchain

    $36 / hr (Avg Bid)
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    42 заявки

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