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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.

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    28 najdenih del, po cenah EUR

    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.

    €4936 (Avg Bid)
    €4936 Povprečna ponudba
    8 ponudb
    Help me build a PVIX fork 5 dni left
    VERIFICIRAN/A

    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.

    €592 (Avg Bid)
    €592 Povprečna ponudba
    4 ponudb
    Token ERC-20 5 dni left

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

    €173 (Avg Bid)
    €173 Povprečna ponudba
    12 ponudb

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

    €1065 (Avg Bid)
    €1065 Povprečna ponudba
    10 ponudb

    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: [prijavite se za ogled URL]

    €352 (Avg Bid)
    €352 Povprečna ponudba
    5 ponudb

    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 : [prijavite se za ogled URL] and [prijavite se za ogled URL] Only freelancer that has experience on it are allowed to bid as I need i...

    €258 (Avg Bid)
    €258 Povprečna ponudba
    4 ponudb

    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. ...

    €470 (Avg Bid)
    €470 Povprečna ponudba
    24 ponudb

    :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...

    €510 (Avg Bid)
    €510 Povprečna ponudba
    6 ponudb

    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...

    €462 (Avg Bid)
    €462 Povprečna ponudba
    12 ponudb
    BLOCKCHAIN API (RBF FIX) 3 dni left
    VERIFICIRAN/A

    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...

    €527 (Avg Bid)
    €527 Povprečna ponudba
    2 ponudb
    Bitcoin poker 3 dni left

    I need a responsive website. I would like it designed and built. [prijavite se za ogled URL] As a reference no registration required with crypto enabled

    €2751 (Avg Bid)
    €2751 Povprečna ponudba
    16 ponudb

    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.

    €202 (Avg Bid)
    €202 Povprečna ponudba
    12 ponudb
    Ethereum Web3j java android app 3 dni left
    VERIFICIRAN/A

    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 : [prijavite se za ogled URL] and [prijavite se za ogled URL] Only freelancer that has experience on it are allowed to bid as I need i...

    €145 (Avg Bid)
    €145 Povprečna ponudba
    3 ponudb

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

    €68 (Avg Bid)
    €68 Povprečna ponudba
    12 ponudb

    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...

    €719 (Avg Bid)
    €719 Povprečna ponudba
    9 ponudb

    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 [prijavite se za ogled ...

    €439 (Avg Bid)
    €439 Povprečna ponudba
    4 ponudb

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

    €184 (Avg Bid)
    €184 Povprečna ponudba
    2 ponudb

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

    €469 (Avg Bid)
    €469 Povprečna ponudba
    9 ponudb
    Bitcoin JSON RPC making issue 1 dan left
    VERIFICIRAN/A

    I am using this PHP library for using Bitcoin JSON RPC. [prijavite se za ogled URL] here have an issue with this method /** * Get [prijavite se za ogled URL] balance. */ $balance = $bitcoind->wallet('[prijavite se za ogled 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 s...

    €139 (Avg Bid)
    €139 Povprečna ponudba
    6 ponudb
    Bitcoin mining process web app 1 dan left
    VERIFICIRAN/A

    Bitcoin mining process web app

    €697 (Avg Bid)
    €697 Povprečna ponudba
    6 ponudb
    Build me a bitcoin mining software 1 dan left
    VERIFICIRAN/A

    Build me a bitcoin mining software

    €213 (Avg Bid)
    €213 Povprečna ponudba
    4 ponudb

    BTC System needed to run our end servers

    €707 (Avg Bid)
    €707 Povprečna ponudba
    9 ponudb

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

    €1237 (Avg Bid)
    €1237 Povprečna ponudba
    28 ponudb

    I need some help with internet marketing.

    €6762 (Avg Bid)
    €6762 Povprečna ponudba
    7 ponudb

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

    €38 (Avg Bid)
    €38 Povprečna ponudba
    9 ponudb

    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...

    €707 (Avg Bid)
    €707 Povprečna ponudba
    10 ponudb
    Simple Crypto Arbitrage Program 1 ura left
    VERIFICIRAN/A

    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...

    €160 (Avg Bid)
    €160 Povprečna ponudba
    9 ponudb
    Help me earn bitcoins 1 ura left
    VERIFICIRAN/A

    I need someone to help me earn bitcoins through cloud mining

    €21 (Avg Bid)
    €21 Povprečna ponudba
    3 ponudb

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