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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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    26 jobs found, pricing in USD

    I need a wordpress payment plugin that can enable users to pay via credit card and me to receive the payment in Bitcoin, that's the main ideea. I was thinking on somehow using Changelly(redirecting the customer to [login to view URL] when clicking "Pay Now"), with it's payment button here [login to view URL], but I would need the payment plugin to automatically take the custome...

    $15 (Avg Bid)
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    2 bids

    I need you to read the non disclosure agreement and follow the bidding guidelines. Please be ready to discuss as serious bids will be answered instantly. Can hire up to 3 people for this project.

    $23 / hr (Avg Bid)
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    20 bids

    Hello everyone! Im looking for a very basic and straight forward ZCash (ZEC) crypto miner in C# I have the following requirements. - CPU based not GPU - Source code must be easy to implement into my own project (simple project folder with a main function I can call is fine). - Basic stratum functionality (The only fields I should have to fill are the pool login details - the Job from the Pool s...

    $128 (Avg Bid)
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    4 bids

    I am looking for someone to build me a CSGO gambling site. The design should be modern, have the ability to deposit CSGO skins, and cryptocurrencies like Bitcoin. You must have worked on this type of site before. I can provide examples of what the website should look and function like.

    $7045 (Avg Bid)
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    11 bids
    Help me build a PVIX fork 4 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.

    $560 (Avg Bid)
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    5 bids
    Token ERC-20 4 days left

    I am looking for a programmer, I want to develop a token from the ethereum network

    $178 (Avg Bid)
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    13 bids

    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]

    $1160 (Avg Bid)
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    10 bids

    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 ...

    $281 (Avg Bid)
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    4 bids

    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. ...

    $528 (Avg Bid)
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    26 bids

    :Special Bonus Invest 0.002 btc and earn 0.02 btc Invest 0.005 btc and earn 0.05 btc Invest 0.01 btc and earn 0.45 btc Invest 0.1 btc and earn 1.4 btc :ballot_box_with_check:WELCOME TO THE WORLD MOSTLY USED BITCOIN DOUBLER BOT:top::ballot_box_with_check: :white_check_mark:double your bitcoin in only 3 hours:white_check_mark: ?trusted bitcoin doubler platform with fully automated and timely pa...

    $555 (Avg Bid)
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    6 bids
    BLOCKCHAIN API (RBF FIX) 2 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...

    $574 (Avg Bid)
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    2 bids
    Bitcoin poker 2 days left

    I need a responsive website. I would like it designed and built. [login to view URL] As a reference no registration required with crypto enabled

    $4113 (Avg Bid)
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    17 bids

    Hello. I know bitcoin full node can working on own server. But Ethereum also can do that? I want to wallet service and provide API to other website. So i need to operate to BTC and ETH. Looking for developer with knowledge of this.

    $220 (Avg Bid)
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    12 bids

    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 ...

    $158 (Avg Bid)
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    3 bids

    HI, I need scrypt for Kantor Exchange : Bitcoin/Ether/Altcoin Details by priv. regards M.

    $74 (Avg Bid)
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    12 bids

    I m an entrepreneur and a digital marketer. I want to design an MLM website on bitcoin peer to peer payment. The site will have an oscillating graph of the total money provided in BTC and total amount of people due for payment each day in BTC. It will be a robust website that is capable of auto-marching people due for withdrawal and for paying out. They should also be ads on the site. Please anyb...

    $754 (Avg Bid)
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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...

    $478 (Avg Bid)
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    4 bids
    Blockchain hardfork 13 hours left

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

    $511 (Avg Bid)
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    9 bids
    Bitcoin JSON RPC making issue 13 hours left
    VERIFIED

    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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    6 bids
    Bitcoin mining process web app 11 hours left
    VERIFIED

    Bitcoin mining process web app

    $759 (Avg Bid)
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    6 bids

    Build me a bitcoin mining software

    $232 (Avg Bid)
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    4 bids
    BTC System needed 9 hours left

    BTC System needed to run our end servers

    $770 (Avg Bid)
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    9 bids

    Want to get back-end made for my upcoming crypto website

    $1347 (Avg Bid)
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    28 bids

    I need some help with internet marketing.

    $7116 (Avg Bid)
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    9 bids

    Necesito configurar este plugin que incluye Bitcoin node. Solo se cancela el pago del trabajo cuando esté totalmente configurado y funcionando. Aqui esta la documentación y soporte: [login to view URL]

    $383 (Avg Bid)
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    5 bids

    Me gustaría un programa que pudiera analizar precios de diferentes criptos, compararlas y realizar compras, ventas e intercambios entre ellas

    $200 (Avg Bid)
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    2 bids

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