Blockchain Jobs

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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    39 jobs found, pricing in USD

    I need someone to integrate trustwallet on my site.

    $146 (Avg Bid)
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    4 bids
    Blockchain Explorer -- 2 6 days left
    VERIFIED

    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!

    $108 (Avg Bid)
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    8 bids

    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.

    $1125 (Avg Bid)
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    Help me build a PVIX fork 5 days left
    VERIFIED

    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.

    $316 (Avg Bid)
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    Hi, I looking for the best inovation solutions in blockchain for e- commerce. Pls contact on priv.

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

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    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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    I have a token called H3D (solidity smart contract). Whenever someone buys or sells H3D through our site ([login to view 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 developers to drai...

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

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    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...

    $27 / hr (Avg Bid)
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    [login to view URL] address [login to view URL] [login to view 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.

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    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 : [login to view URL] and [login to view URL] Only freelancer that has experience on it are allowed to bid as I need it asap. in your ...

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    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. ...

    $512 (Avg Bid)
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    PIVX blockchain expert 3 days left
    VERIFIED

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

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    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...

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

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    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

    $118 / hr (Avg Bid)
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    BLOCKCHAIN API (RBF FIX) 3 days left
    VERIFIED

    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...

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    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 : [login to view URL] and [login to view URL] Only freelancer that has experience on it are allowed to bid as I need it asap. in your ...

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    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. [login to view URL] payment system (both sellers and buyers check the month of use, a period of use, etc. according to the...

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    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...

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    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 [login to view URL] Exa...

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

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    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'.

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    I want a programme I can run on a server that uses Twitter's API to monitor accounts I specify by username. When that user 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 the 'Data Input'.

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    Need a blockchain developer 1 day left
    VERIFIED

    I need a blockchain developer who can fix the double-spend attack on my website made by laravel using blockchain official api

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    Hello, im looking for developer who can code bitcoin payment gateway for my site, i dont want use any middle sites

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    I need a new website. I already have a design, I just need you to build my personal website.

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    looking for a new crypto coin for myself by hard forking any good existing blockchain. Only experienced developer contact me. Fixed budget : 500$

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    I am using this PHP library for using Bitcoin JSON RPC. [login to view URL] here have an issue with this method /** * Get [login to view URL] balance. */ $balance = $bitcoind->wallet('[login to view URL]')->getbalance(); echo $balance->get(); // 0.10000000 i need to solve this issue if anyone has experience with this just need help. I have a ready script but this method no...

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    We want to develop a token on Ethereum Blockchain and Smart Contracts starting from a whitepaper in our possession.

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    To do a fork of a crypto project along with Explorer, web api's, SDK , web based browser wallet and reference number payments along with exporting any of these can be - NANO, IOTA, Stellar, Ripple (if you can get the source code)

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    Hello, i need working bitcoin payment system on my website using blockchain api

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    I need a coin made on etherum block chain.

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    I need some crypto currency code making in Cosmos SDK. I require the following: Development of Blockchain , source code implementing security technology. Deployment on Main Net and testing using RS2-3. Developed using GO Programming and Swift. Development of block ledgers using secure login and implementation of security protocols SHA-256. Wallet developed to store BID tokens, both Android and Wi...

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    Simple Crypto Arbitrage Program 4 hours left
    VERIFIED

    Looking for someone to create a simple but robust and reliable Crypto Arbitrage program that would allow me to click on a possible opportunity and instantly execute an arbitrage trade with no hassle. I would like the to base these opportunities from the Coingapp app or something similar. The program should allow me to enter the API of many exchanges and efficiently trade for the desired coin, tran...

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    Help me earn bitcoins 3 hours left
    VERIFIED

    I need someone to help me earn bitcoins through cloud mining

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    Hello, i want ethereum smart contract which can create multiple contracts, newly created contract addresses can receive ethereum as well as erc20 tokens. (basically i want the ethereum address o be created whenever i call the function from visual studio to create new smart contract in return i will need address of that newly created smart contract). along with that i also want to reserve abilit...

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    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...

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