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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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    31 δουλειές που βρέθηκαν, με τιμές EUR

    I need Bitcoin Node to be installed with API key. The whole server must be install securely and should be penetrate able. Server must run a full node with API access. API must be use able to create/generate new wallet addresses, Node must be able to send and receive payments, Node must be automatically transferring funds from node wallet to a cold / hardware wallet. Server must be protected agains...

    €108 (Avg Bid)
    €108 Μέση Προσφορά
    2 προσφορές
    Crypto QT Wallet UI Update & Feature integration 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    We are looking for someone with a lot of experience with blockchain and wallets. We are looking for someone that can update the entire wallets UI and add additional features such as a graph, seed key. Ideally looking for around the 500-600$

    €413 (Avg Bid)
    €413 Μέση Προσφορά
    12 προσφορές

    I need trading cryptocurrency market fully functional, similar to big exchangers. - Wallet - deposits and withdrawal of crypto only. Knowledge of digital currencies and how cryptocurrency market work. Please do provide links to similar project you have done.

    €977 (Avg Bid)
    €977 Μέση Προσφορά
    33 προσφορές
    looking for Co founders programmer and ICO specialist 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I am looking for Co founders blockchain programmer and ICO specialist to start new project

    €17 (Avg Bid)
    €17 Μέση Προσφορά
    4 προσφορές

    I need help in Creating PIVX Masternode coin with all steps like integrating blockchain , block explorer , QT wallets ( Win - 32-64, Linux, Mac ) , Publishing source code in github , Creating masternode guide , I will first check if the coin chain is smooth or not I mean no bugs in the coin or proof of stake. Many Thanks

    €328 (Avg Bid)
    €328 Μέση Προσφορά
    6 προσφορές
    crypto exchange -- 2 6 μέρες left

    Hello! I need a script crypto exchange, just looking for a ready solution. Before buying, I need to watch a demo! I do not need to develop from scratch, such a proposal please do not write to me!

    €1136 (Avg Bid)
    €1136 Μέση Προσφορά
    34 προσφορές
    Bitcoin jackpot site 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Looking for partner (paid small amount while working and then site revanue) I want a bitcoin jackpot site (script) Players register and deposit btc. They then ret credit on the site to use in the jackpot. Jackpot is timed so Player can join in and try win the pot. Site profit is 10% of each played game. Dont reply of you havent read it all. Dont reply og you dont Know what bustabit crash gam...

    €62 (Avg Bid)
    €62 Μέση Προσφορά
    3 προσφορές
    Smart Contract needed for ICO / Token distribution 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Greetings, digital warriors, We're seeking a capable developer with experience writing smart contracts. We will be embarking on our ICO sometime in January, and need a smart contract to be written for us. We will take care of the ICO landing page (front/back-end), and we will have a payment gateway ready (Coinpayments). All we need from you, is a rock-solid smart contract that will enable...

    €2449 (Avg Bid)
    €2449 Μέση Προσφορά
    48 προσφορές
    Create new genesis block 5 μέρες left

    I need to generate new genesis block insted of current one for POW/POS cryptocurrency, with new vAlertPubKey and scriptPubKey all instruction and steps should be include. award will be according to best price

    €159 (Avg Bid)
    €159 Μέση Προσφορά
    8 προσφορές
    crypto exchange 5 μέρες left

    Hello! I need a script crypto exchange, just looking for a ready solution. Before buying, I need to watch a demo! I do not need to develop from scratch, such a proposal please do not write to me!

    €1242 (Avg Bid)
    €1242 Μέση Προσφορά
    43 προσφορές
    Cryptocurrency mining pool modification 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I'm trying to modify pool codes in a mining pool using SHA 256 and redeem the hashes in another coins . Basically my device only process SHA 256 but wondering if we could program the pool to convert the algorithm ? please contact me if you have experience in this filed. my method of payment is by creating milestones and release it once the task was completed . had lots of good reviews so far...

    €408 (Avg Bid)
    €408 Μέση Προσφορά
    15 προσφορές
    Bitcoin Shop & Wallet 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    We need website or web application for sell bitcoins & Cryptocurrency online by credit card like this page [κάνε είσοδο για να δεις το URL] The client register in our website and he must get wallet for send and receive the bitcoin

    €907 (Avg Bid)
    €907 Μέση Προσφορά
    36 προσφορές
    ERC20 token exchange listing with 1 - 2 eth budget. 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    ERC20 token listing with 1 - 2 eth budget.

    €466 (Avg Bid)
    €466 Μέση Προσφορά
    24 προσφορές

    hello! we are looking for people who can get us a decentralized crypto exchange you can looking at this website [κάνε είσοδο για να δεις το URL]

    €2060 (Avg Bid)
    €2060 Μέση Προσφορά
    13 προσφορές
    Smart Contract and Dapp 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    1. Smart contract for TRC20 [κάνε είσοδο για να δεις το URL] development [κάνε είσοδο για να δεις το URL] of Dapp and TRC20 coin Should be strong in C++ is fo...

    €180 (Avg Bid)
    €180 Μέση Προσφορά
    4 προσφορές
    ICO Bounty Program - ICO Marketing Manager 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    we need someone to write, publish and manage an ICO bounty program 1. BOUNTY CAMPAIGN ANNOUNCEMENT 2. MANAGE THE BOUNTY CAMPAIGN ITSELF Looking for an experienced bounty manager to manage our bounty campaign for an ICO. We our an upcoming ICO Project and need a bounty manager for an ICO camapign. Your tasks include community management for our different Bounty Campaigns and Airdrops for an ...

    €437 (Avg Bid)
    €437 Μέση Προσφορά
    10 προσφορές
    cryptocurrency 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    i want to create a cryptocurrency for payment.

    €511 (Avg Bid)
    €511 Μέση Προσφορά
    23 προσφορές
    Setup Electrum Wallets 3 μέρες left

    I am looking for a blockchain developer experienced in setting up Electrum wallets. Project's description and features is attached.

    €293 (Avg Bid)
    €293 Μέση Προσφορά
    11 προσφορές
    Blockchain expert. 3 μέρες left

    Hi. I am going to develop new blockchain. I will share details for right freelancer.

    €890 (Avg Bid)
    €890 Μέση Προσφορά
    33 προσφορές
    Needed ERC20 token Service 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    We need ERC20 token Service Developer. We are looking for a highly skilled developer who can provide us ERC20 Services. We are looking for • Get Balance • Token Send/Receive • Token Address Generation • Transaction History Please Note: • You will need to handover the full development source code to us. • Should be developed with PHP CodeIgniter. • We need the se...

    €480 (Avg Bid)
    €480 Μέση Προσφορά
    18 προσφορές
    Create PIVX based new coin ( Masternode Coin) 2 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    1. Create a masternode coin like pivx 2. Create block explorer 3. Create QT wallets ( Win - 32-64, Linux, Mac ) 4. Publishing source code in github [κάνε είσοδο για να δεις το URL] masternode guide 6. guide to install the seednode Please note : I require only professional develo...

    €503 (Avg Bid)
    €503 Μέση Προσφορά
    10 προσφορές
    Calculadora Minería Criptomonedas 2 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    El proyecto es crear una calculadora de minería de criptomonedas. 1. Programación de la calculadora. - Se te entregarán las ecuaciones necesarias. - Se extraerá la información de una API Rest externa. 2. Diseño de la calculadora. - Se te entregará el diseño desktop para que crees la plantilla. - Debe ser mobile-friendly. Hablemos por cha...

    €450 (Avg Bid)
    Προεξέχον
    €450 Μέση Προσφορά
    17 προσφορές
    Help create my Blockchain Fork... 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need a Blockchain Developer capable of producing a fork with basic Blockchain Adjustments like Block Time, Block Reward, Block Halving, Etc. We would like a wallet implemented and designed as well along with several additional aspects to the development but nothing to extensive. We would require someone with at least 2-3 years experience with Blockchain Developer. ***NOT SMART CONTRACTS! SOL...

    €32 / hr (Avg Bid)
    €32 / hr Μέση Προσφορά
    42 προσφορές
    Blockchain developer 1 μέρα left

    I want to develop a proprietary service for my customers. Essentially, it's going to be a stripped-down version of blockchain. I need someone who is knows blockchain inside out - to the point where theyre not helplessly enamoured by it. If you know what you're doing, this is a walk in the park. If you're wrapped up in your crypto bubble, stay there, I have no use for you

    €1387 (Avg Bid)
    €1387 Μέση Προσφορά
    37 προσφορές
    Compile new POS/POW coin -- 2 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I want to start a new coin POS/POW. Please bid if you have already developed coins. Looking forward for serious dev..

    €656 (Avg Bid)
    €656 Μέση Προσφορά
    8 προσφορές
    Bitcoin Squad 1 μέρα left

    Bitcoin Squad is a training program that teaches you how to invest, trade, and profit by using cryptocurrencies and Forex. The program has something for everyone from beginner basics to advanced techniques. By taking our master class you will become a pro trader in no time making the income you have always dreamed of. The company is some what new and we are looking to expand through targeted adver...

    €117 (Avg Bid)
    €117 Μέση Προσφορά
    6 προσφορές

    We need someone to help with marketing and crowdsales We are looking genuine marketer who can promote our ICO and generate real revenue. Here is project details: We have developed a decentralize exchange! We want to do ICO so you need to promote our ICO and generate real revenue. You will get paid after success our ICO. You must have to have a good review of ICO on your profile. Thank you a...

    €42 / hr (Avg Bid)
    €42 / hr Μέση Προσφορά
    17 προσφορές
    Build a Bitcoin + VGO gaming website from design 11 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    This website will have: - Game (game + relevant Admin Panel data) - Deposit and withdraw (Bitcoin/VGO + Welcome Bonus) - Affiliates (Invite friends for % of commission with affiliate code/link) - Level up (levels up the user and rewards user with free coins) - Chat (including moderators) + extra Message me for more information including images and designs in PSD and .jpg

    €2088 (Avg Bid)
    €2088 Μέση Προσφορά
    26 προσφορές
    fix minor crypto payment processor issues on website 7 ώρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    fix minor issues on coinspayment gateaway. btc, eth, and ltc mostly is fixed, just that the exchange rate has a problem. [κάνε είσοδο για να δεις το URL]

    €72 (Avg Bid)
    €72 Μέση Προσφορά
    10 προσφορές
    Create a new Crypto Currency 15 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Create a new Crypto Currency by Improving open source existing codes and ensure its reliability to connect to external environments, and implement sepcific specs and deliverables and high level security.

    €3014 - €5023
    Προεξέχον Σφραγισμένο ΣΜΓ
    €3014 - €5023
    63 προσφορές
    Crypto expert required.. 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need a Crypto expert for my current projects. If you have knowledge please bid. Details will be shared in message with the freelancers.

    €6 - €64
    Σφραγισμένο
    €6 - €64
    30 προσφορές

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