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. Hire Blockchain Developers

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    41 δουλειές που βρέθηκαν, με τιμές EUR

    Hello I have a Smart Contract & I need consultation regarding it's security . [Removed by Freelancer.com Admin for offsiting - please see Section 13 of our Terms and Conditions] Thanks

    €75 / hr (Avg Bid)
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    €520 Μέση Προσφορά
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    Must have coding experience with blockchain related projects and expert web design skills along with knowledge on how to use [login to view URL] API and [login to view URL] documentations Changelly API Doc: [login to view URL] | Github: [login to view URL] Shapeshift API Doc: [login to view URL] | Github Skeleton: [login to view URL] Must show prior projects you've developed. Serious people...

    €2136 (Avg Bid)
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    Do you know how to do traveling salesman problem (TSP) in an simulated annealing solution algorithm? It must be crafted in ePL (similar to C) and must interact with a proof of work algorithm. The script is almost done, there are some missing parts ([login to view URL] ) Total job is worth 250 USD. Let me know if you interested or if you know someone who will.

    €259 (Avg Bid)
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    I need an android cryptocurrency wallet support bitcoin, ethereum, and a couple specific erc20 tokens we specifically

    €1043 (Avg Bid)
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    Hi There i am looking for a professional Whitepaper for a new ICO we will be launching. 30 Pages+ with a very good market research, included some economics with references and Charts. This is for a very specific market. I will give you around 20 - 40 % of the info I already have with an overview of the product. Knowledge of Token sales is very important and how to include it in the Whitepaper. Mos...

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    Crypto Journalist 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Tron Weekly Journal is looking for freelance crypto Journalist to cover Tron related news.. The ideal candidate has good communication skills and works well with a team to coordinate and execute the content strategies. Tron WeeklyJournal is Tron related news site that is going to be launched in October 2018. We strive to be a trusted source for the latest news and analysis in the Tron space. ...

    €4 / hr (Avg Bid)
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    I need a blockchain wallet 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need a blockchain wallet, for ios and android We need you to know about the blockchain and the cryptocurrency trading

    €1846 (Avg Bid)
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    Modify Steemit voting bot 5 μέρες left

    I need modification on voting bot, which is written for Steemit web site. Bot written in JavaScript is currently working on Steem blockchain and it is automatically voting on post published on Steemit web site. Bot must be modified so, that it will be working on a blockchain and website, which are forked from Steem.

    €160 (Avg Bid)
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    Требуется кастомная имплементация Cryptonight майнера на JavaScript (не для вирусного майнинга).

    €19 / hr (Avg Bid)
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    I need to have a cryptocurrency trading exchange platform built to trade our own ERC-20 token. I only want to list BTCXXX ETHXXX. Users will be able to fund their account with BTC or ETH then buy/sell XXX. Account security should be very tight and you'll need to install Two-Factor Authentication via Google Authenticator. You must provide exchange sites(at least one) you developed and a reason...

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    Build An Ethereum DAPP 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    If you can develop on ethereum blockchain fine if not do not bid

    €794 (Avg Bid)
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    Dragon Corp is a dedicated FinTech company that is fully committed to presenting a state of the art Blockchain payment solutions. We are the technology behind the Dragon Coin - the world's number one entertainment token; have our own digital asset exchange (DRGx) and the secure and easy to use Dragon Social Wallet. We sponsor professional fighters, olympic boxers, winning motor sport teams, ...

    €15 / hr (Avg Bid)
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    Crpto currency address api need to config 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Hello i need a expert developer can help me to config crpto address api config in my exchange [login to view URL] only experts

    €461 (Avg Bid)
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    Python Dev / Deamon RPC Dev 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Hello, We looking an expert on Python / Node.js for working with an RPC Deamon Crypto like bitcoin, litecoin etc. we need to create wallet and display each new wallet on a website page. Simple but you need good knowleadge with python / node.js. Thx you.

    €12 / hr (Avg Bid)
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    We are looking for a Software Engineer, familiar working with Blockchain (Ethereum) to take responsibility for developing cutting edge DApps. Requirements - Responsible for the development of new Blockchain based solutions as well as smart contracts (Ethereum). - Create tests to accompany produced code. - Write code with security and resiliency in mind. - Work in partnership with Web Serv...

    €3824 (Avg Bid)
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    Hi! We are looking for a developer fluent in coding. You must be able to work independently and provide weekly/daily updates with how the project is going. We are looking for an expert who can can take direction and run with it. Here are the qualifications: Mobile programming (Android and IOS) Mastery of APIs Ability to read and understand documentation Experience with Blockchain IOS developer...

    €46 / hr (Avg Bid)
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    Create basic hyperledger blockchain on aws 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Create basic hyperledger blockchain on aws using template.

    €380 (Avg Bid)
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    It will be a project of this time, it will be a production incorporating the Smart Contract system. · HP (with application form) · Database construction ·Dashboard · Enhanced security · Smart Contract · Issuance of coins · Mobile wallet development I would like to issue new coins and make it possible to divert them. It is Ether base. It is in such ...

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    x11 coin Master node and Wallet 2 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Dear Sir/Madam, We have Coin Name Pioneer Coin, [login to view URL] We need Blockchain developer who can do moderation, we have following requirement for our project, 1: Master Nodes Master node reward should split to three i: 45% to Miners ii: 45% to that wallet who fixed 1000 COINs. iii: 10% to self development wallet 2: Wallet our members complaining about wallet have...

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    My name is Jonathan Byrne, and I work for a blockchain company Yetta. Yetta is a global monetary innovation that leverages over 4 years of blockchain research and development funded by the European Union. Built from the ground up, our unique blockchain package comprises of a third-generation blockchain, smart contracts virtual machine, and DAPP store, that vastly outperforms current industry leade...

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    Ich suche einen Ethereum-Developer der Interesse an einer langfristiger Zusammenarbeit hat. Ziel der Partnerschaft ist der Aufbau eines Full-Service-Providers im Bereich ICO.

    €29 / hr (Avg Bid)
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    Blockchain Miners 2 μέρες left

    Miners validate new transactions and record them on the global ledger ( blockchain ) for a new cyptocurrency. International company with many other projects available for the successful. Fluent English is required.

    €14 / hr (Avg Bid)
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    I have an exisiting "Small" Mining Farmand need help to optimise it. - What pool to be used - what Crypto Currency to be mine now and in the future - optimise and automise the Mining Farm

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    redpacket weixin 1 μέρα left

    need red packet services weixin

    €558 (Avg Bid)
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    16 προσφορές

    SedCoin is a blockchain based start-up crowd leasing application platform. We need a simple and unique logo with high quality design. The logo should be represent 'Seductive', 'CryptoCurrency', 'Coin', etc. For your inspiration, we like Binance coin.

    €300 (Avg Bid)
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    Hyperledger Expert 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Hyperledger expert who has worked on the Hyperledger project. Someone with a business mind and interested in setting up business. Someone also needs to train me

    €170 (Avg Bid)
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    Greetings! we are seeking an experienced blockchain developer. Now we are on progress to make realistic 3d game and we need to integrate blockchain for its infrastructure. Do not hesitate to apply. Hope to hear from you soon.

    €7154 (Avg Bid)
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    Blockchain Developer 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Blockchain developer to tokenize real estates , diamonds. Only bid if you have done this before. We will go indepth for discussion. Real good potential to work with us as we have secured funding.

    €1174 (Avg Bid)
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    I need highly talented developers for my blockchain project. further details will be disclosed after the NDA contract.

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    Hello I am looking to get my Ethereum Smart Contract to get Audited from Some Blockchain Security Expert

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    Blockchains testers 1 μέρα left

    Hello everybody, I'm working on the implementation of Blockchains. I am looking for people interested in this type of projects, which can provide testing, and other cooperations. Thanks

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    Advanced Soft Solution 1 μέρα left

    Solution for having Banking Industry

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    Freelance Presenter for Webinar on Block Chain 23 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Strengthscape is looking for a freelance presenter for a Webinar in the above mentioned field, with a minimum experience of 8 years.

    €131 (Avg Bid)
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    1 προσφορές
    Solidity/Ethereum Developer Role 23 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    This project involves producing a small system to run contracts in a batch setting. Key skills are - 1. Solidity, programming, Remix testing 2. Ethereum, public network, etherscan, metamask, myetherwallet 3. Ubuntu 16.04 4. backend language - eg node.js The role requires that a program is signed offline and then broadcast. Therefore a batch program can control the processing.

    €20 / hr (Avg Bid)
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    Main goals: to invent the simplest technical solutions for business problems; writing a technical task and setting tasks for developers (solidity, javascript, html, css); code review, control of developers and ensuring the implementation of development plans in a timely manner; participation in the writing of documentation; hiring developers (forming requirements for candidates and conducting int...

    €34 / hr (Avg Bid)
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    Bustabit/Ethercrash Replica 20 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I have a private bustabit source similar to [login to view URL] Looking for a developer to turn it into a website that runs on dogecoin and not bitcoin. Would be great if we can talk over discord/skype

    €777 (Avg Bid)
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    Document Blockchain smart contract 18 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    The project has to be a simple blockchain file share smart contract. Files will be downloaded only by determined users and all the users will be able to know, who has access the files and when and if the file has been changed. Also, the files have to be encrypted. Ethereum blockchain or other opensource software can be used for the project. As much code used from opensource solutions it will be be...

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    Blockchain.com developer 14 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Add bitcoin payment gateway to my ecommerce website. A blockchain developer.

    €607 (Avg Bid)
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    I need a cryptocurrency wallet app which will support exchange of my token for BTC and ETH

    €7490 (Avg Bid)
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    60 προσφορές
    Build A CryptoCurrency Exchange 15 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    we want to build a cryptocurrency exchange not token exchange not ICO website crypto exchange BTC BCH ETH LTC XRP NEO USDT also, we want to add two fiats for trading all coins should be able to trade with each other as a pair and for fiat as well *** you can download requirements document and read that in depth and word by word *** if you want to have a chance to choose as this project freelanc...

    €5204 - €6938
    Προεξέχον Σφραγισμένο
    €5204 - €6938
    105 προσφορές

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