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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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    36 trabajados encontrados, precios en USD

    hi looking for someone who is familiar bcoin and [iniciar sesión para ver URL] we want to develop something similar to it you must be familiar with bcoin repo and you must familiar with blockchain

    $688 (Avg Bid)
    Acuerdo de Confidencialidad
    $688 Oferta Promedio
    6 ofertas

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

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

    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...

    $20 (Avg Bid)
    $20 Oferta Promedio
    2 ofertas

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

    $85 (Avg Bid)
    $85 Oferta Promedio
    2 ofertas
    Blockchain Expert Need 6 días left
    VERIFICADO

    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. [iniciar sesión para ver URL] If you are an expert, let me know. Thanks

    $1247 (Avg Bid)
    $1247 Oferta Promedio
    18 ofertas

    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 Oferta Promedio
    10 ofertas

    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...

    $8914 (Avg Bid)
    $8914 Oferta Promedio
    11 ofertas
    PHP Hyperledger Fabric integration 6 días left
    VERIFICADO

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

    $141 (Avg Bid)
    $141 Oferta Promedio
    7 ofertas

    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

    $663 (Avg Bid)
    $663 Oferta Promedio
    15 ofertas
    Blockchain Explorer 6 días left
    VERIFICADO

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

    $211 (Avg Bid)
    $211 Oferta Promedio
    13 ofertas

    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 [iniciar sesión para ver 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)
    $20 Oferta Promedio
    1 ofertas

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

    $2760 (Avg Bid)
    $2760 Oferta Promedio
    7 ofertas
    I need an investment app 5 días left
    VERIFICADO

    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)
    $466 Oferta Promedio
    17 ofertas

    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. [iniciar sesión para ver URL]

    $1208 (Avg Bid)
    $1208 Oferta Promedio
    18 ofertas

    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...

    $2800 (Avg Bid)
    $2800 Oferta Promedio
    25 ofertas
    Blockchain/gps/banking 5 días left
    VERIFICADO

    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.

    $1686 (Avg Bid)
    Acuerdo de Confidencialidad
    $1686 Oferta Promedio
    21 ofertas
    GraphQL server & query setup -- 2 5 días left
    VERIFICADO

    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 [iniciar sesión para ver 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. - F...

    $67 (Avg Bid)
    $67 Oferta Promedio
    5 ofertas

    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)
    $248 Oferta Promedio
    6 ofertas

    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...

    $2318 (Avg Bid)
    $2318 Oferta Promedio
    11 ofertas
    Bitcoin/ Crypto eCommerce Website 4 días left
    VERIFICADO

    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)
    $110 Oferta Promedio
    3 ofertas

    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 [iniciar sesión para ver URL] (which is built with Meteor and available on [iniciar sesión para ver URL]), and customize it to load videos from my own servers. Currently, [iniciar sesión para ver URL] loads video...

    $55 / hr (Avg Bid)
    $55 / hr Oferta Promedio
    16 ofertas
    Ride sharing app 3 días left
    VERIFICADO

    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)
    $1478 Oferta Promedio
    68 ofertas
    Need Blockchain developer 3 días left
    VERIFICADO

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

    $1185 (Avg Bid)
    $1185 Oferta Promedio
    10 ofertas
    Develop Cryptocurrency -- 2 3 días left
    VERIFICADO

    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.

    $574 (Avg Bid)
    $574 Oferta Promedio
    14 ofertas
    Online auction 2 días 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.

    $122 (Avg Bid)
    $122 Oferta Promedio
    4 ofertas
    Hyperledger Indy 2 días 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)
    $14808 Oferta Promedio
    30 ofertas
    Add asicboost on yiimp stratum 2 días left
    VERIFICADO

    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)
    $404 Oferta Promedio
    2 ofertas
    Build me an application 1 día left
    VERIFICADO

    I am looking for a developer to build a simple application using the [iniciar sesión para ver URL] API. More details will be discussed with selected developers only.

    $339 (Avg Bid)
    $339 Oferta Promedio
    12 ofertas

    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

    $88 (Avg Bid)
    $88 Oferta Promedio
    4 ofertas

    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)
    $321 Oferta Promedio
    15 ofertas
    ICO for real estate project 1 día left
    VERIFICADO

    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)
    $4859 Oferta Promedio
    64 ofertas
    Rehive custome intergration 1 día left
    VERIFICADO

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

    $529 (Avg Bid)
    $529 Oferta Promedio
    6 ofertas
    Blockchain Certificate System 15 horas left
    VERIFICADO

    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)
    $1900 Oferta Promedio
    24 ofertas

    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)
    $35071 Oferta Promedio
    7 ofertas
    Crypto margins trading developer 10 horas left
    VERIFICADO

    Looking for developer to developer crypto margins trading developer like [iniciar sesión para ver URL] more info in chat

    $37 / hr (Avg Bid)
    $37 / hr Oferta Promedio
    27 ofertas

    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)
    $36 / hr Oferta Promedio
    42 ofertas