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Bitcoin is a crypto currency, with the creation and the transfer of the bitcoins being based on a protocol that does not depend on the central authority. The coins can be transferred through computers or through smartphones and related devices, without the necessity of having a financial institution as an intermediate. This concept was established by Satoshi Nakamoto in 2008 and it was geared towards the world of electronic cash systems. If you understand more about this topic on a professional level, then you have a better chance to enjoy the advantages of being a freelancer at Freelancer.com.

Bitcoin has its own technical part that needs to be addressed by professionals. If you are one of them, then you should be on a platform that ensures the consistency of job posting by clients. When working as a bitcoin freelancer at Freelancer.com, you will have access to many of the jobs posted by clients from all over the world and bid on those that are within your professional level. There is too much to enjoy while working at the leading freelancer platform online, including getting paid at rates that your services deserve, giving you the encouragement you need to keep on working on more Bitcoin projects.

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    18 trabajados encontrados, precios en EUR

    A set of new beta testers comes to a new cryptocurrency exchange, everyone can participate in the absolute, even without experience. All beta participants will receive $ 500 in their balance for trading bitcoins. For each error we find, we pay 500 dollars.

    €27 - €226
    €27 - €226
    0 ofertas
    Crypto Exchanges data feed 6 días left
    VERIFICADO

    Im an active crypto trader and im in the need of a tool in order to enchance my trading. Basically i need to take data from two different exchanges (orderbook, orders, balance, position) using API. Both exchanges have API documentation. The most important thing about this Project is the speed, i need near 0 latency and no delay between the exchanges and the server. I need someone who can give me a...

    €42 / hr (Avg Bid)
    €42 / hr Oferta Promedio
    12 ofertas

    hi im looking for a good coder who can create a fiat to crypto exchange site with kyc, verify, kraken api options, 3 or 4 currencies and some other features, no trading, no crypto swap or something like that.

    €1198 (Avg Bid)
    €1198 Oferta Promedio
    32 ofertas

    We need to test the operation of the ERC20 (CRYPTOCASHBACK) CSSBACK token. We invite specialists on working with smart contracts on the ethereum and blockchain networks. 1. It is necessary to conduct an audit. 2. Check the network stability. (make several transactions with our tokens within the ERC20 network. 3. Identify network vulnerabilities, if any. For more information send your applications ...

    €493 (Avg Bid)
    €493 Oferta Promedio
    9 ofertas

    I need someone who can install complete [iniciar sesión para ver URL] on my AWS server. You must have to have past experience about installing exchange. Exchange Liquidity Referral Multi language HOT/Cold Wallet erc20

    €215 (Avg Bid)
    €215 Oferta Promedio
    11 ofertas

    Looking for long term developer team for the new project. 1. Liquidity 2. 5 crypto Market - BTC,ETH,LTC,USDS, XRP 3. 20 ERC20 coins to be listed 4. New dark and light UI design (binance basic) 5. Admin Panel must have the listing function and adding market pair function. 6. Referral function needs to add and there should be manage function like 30%,50%80% as per admin mind. My budget is 200$ now...

    €1200 (Avg Bid)
    €1200 Oferta Promedio
    18 ofertas

    Before we move on please show me a demo of your work - centralized exchange platforms! We are looking perfect cryptocurrency exchange which you developed before so we can buy and launch by tomorrow!

    €655 (Avg Bid)
    €655 Oferta Promedio
    12 ofertas

    The task is to produce a working .exe build using [iniciar sesión para ver URL] this is a altcoin forked from litecoin 0.15 source code, this .exe must be executable from any windows system We will also need the step you followed to build the wallet

    €95 (Avg Bid)
    €95 Oferta Promedio
    7 ofertas
    Cryptocurrency Trading Simulator 5 días left
    VERIFICADO

    We are building a cryptocurrency analytics site and would like to integrate a crypto trading simulator as additional functionality within the site. This will need to be integrated into the current site architecture as well as our CRM system, and will also be tied to weekly and monthly tournaments where the winners receive real crypto prizes. Current site built with React and Gatsby.

    €45 / hr (Avg Bid)
    €45 / hr Oferta Promedio
    27 ofertas

    need to create concurrency trading website with payment gateway with btc wallet.

    €1784 (Avg Bid)
    €1784 Oferta Promedio
    8 ofertas
    security of contract 3 días left
    VERIFICADO

    [iniciar sesión para ver URL] Hi, I want to have a security report form "Oyente". it should be done in 2-3 hours it is very simple because the contract in very simple. all u do is to follow the steps in the shared link. Max budget is 10 USD

    €11 (Avg Bid)
    €11 Oferta Promedio
    4 ofertas

    Building community for a cryptocurrency exchange. Building karma on reddit, followers on twitter and telegram, points on bitcointalk etc.

    €286 (Avg Bid)
    €286 Oferta Promedio
    7 ofertas

    I need a new website. I already have a design, I just need you to build it.I need someone that understands cryptocurrency, blockchain, specifically bitboss tokenized protocol that runs on Bitcoin sv.

    €1071 (Avg Bid)
    €1071 Oferta Promedio
    21 ofertas

    I am going to build a website to integrate with etherum blockchain. You must have rich experience with etherum, erc20token. This project must be finished in 10 days. Please bid if you are definitely confident in this field and add *blockchain expert in your proposal at first. Thanks.

    €1368 (Avg Bid)
    €1368 Oferta Promedio
    22 ofertas

    I'm looking for a program to perform multi-sign BTC and/or ECR20 token transactions offline and online It must support signing via hardware such as Trezor and Nano Ledger and AWS CloudHSM Java language preferred

    €164 (Avg Bid)
    €164 Oferta Promedio
    3 ofertas
    ETH, BTC deposit system 1 día left
    VERIFICADO

    Hi, I want to talk to someone expert who has done the deposit system for ETH, BTC coins, I want to know the whole process from A TO Z that one developer can implement the deposit system in web application. Please only bid if you have developer the deposit system earlier, don't waste my and your time for the money.

    €8 / hr (Avg Bid)
    €8 / hr Oferta Promedio
    11 ofertas

    I want to use the secp256k1 C extension, but I don’t know the application of this algorithm. What I want to do is to encapsulate this extension as a function or class. When I call btc(sha256) I can get the address and private key of btc. (*I need to call on cuda) Na koniec otrzymam plik * .c lub * .cu [iniciar sesión para ver URL]

    €214 (Avg Bid)
    €214 Oferta Promedio
    2 ofertas

    I am looking for engineer who can work with our team to develop the Bitcoin website... Must be good at Blockchain and website and DB.... Also, have got a good knowledge of AWS.

    €678 - €1356
    Sellado
    €678 - €1356
    58 ofertas

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