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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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    43 jobs found, pricing in USD
    Bulid a bot trading crypto 6 days left
    VERIFIED

    Hello, I'm looking to bluide a bot trading for crypto (btc, eth, usdt, xrp, ltc). Regards, Mr El Adadi

    $495 (Avg Bid)
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    17 bids

    We have launched a cryptocurrency exchange and currently, we are using a wallet service provider. We are looking for the below: - Create Bitcoin and Ethereum/ERC20 wallets on a cloud - Integrate the exchange to the wallets - Testing Please bid ONLY IF YOU ARE EXPERIENCED and have a good knowledge on cryptocurrencies / bitcoin / ethereum / ERC20 wallets

    $823 (Avg Bid)
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    19 bids
    Fork PIVX coin 6 days left
    VERIFIED

    I want to fork PIVX coin with my coin spec. PIVX only enables PoS after PoW is finished. We want PoW & PoS all the time. Is that possible? I will provide PoW, PoS, Masternode rewards plan. Only experienced freelancers bid please.

    $2805 (Avg Bid)
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    6 bids

    Looking for someone who can help us in - set up the full node of various coins like XRP, ETH, BTC, USDC etc. - create JSON-RPC APIs - Create a wallet address for every user - Handling of private keys - Wallet management We are working on an exchange and for that, we are looking for someone who already has experience in above-mentioned tasks.

    $51 / hr (Avg Bid)
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    13 bids

    I need you to develop crypto currency wallet

    $37 / hr (Avg Bid)
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    42 bids

    I want to create a script that compares crypto currency prices on a exchange - by - exchange basis. I want to see the profit in%. (compare than index price) My site is made by WordPress and I want to make it as follows. exchange price [login to view URL] price [login to view URL] or upbit or coinone [login to view URL] or okex [login to view URL] or Coinex [login to view URL] thailand [login t...

    $204 (Avg Bid)
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    17 bids

    Since upgrading to ethOS 1.3.3 when I try to connect to our pool using stratum I get the error. "Could not subscribe: code:-3 message:Method not found" We need to be able to connect with new versions of ethOS 1.3.3. I don't know what changed. Did stratum finally standardize? Can the pool be modified to work with stratum now? I did not see anything about stratum in the release ...

    $202 (Avg Bid)
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    2 bids
    OneHash Betting 6 days left

    im looking for a similar to onehash , if you know about this how it works send me proposal on how and what function you can implement. if you got no idea how onehash betting platform works do not waste my time . no time waster here. .................................................................................... OneHash is a Bitcoin gambling platform providing mutual betting in sports bet...

    $3076 (Avg Bid)
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    17 bids
    revise node.js arbitrage bot 6 days left
    VERIFIED

    i need a cryptocoin bot that can handle arbitrage between cryptoexchanges. recently a developer worked for this project but he had health issues and left the project Bot %60 finished but not completed, frontend is nearly complete, all codes are in Digital ocean droplet server and it works partly, have 3 cryptocoin exchanges and 15 coins integrated. - job description and details are here [login to ...

    $392 (Avg Bid)
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    8 bids

    i need to mine bitcoin but i dont know how.

    $781 (Avg Bid)
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    13 bids
    Bitcoin Vendor Shop for TOR 5 days left
    VERIFIED

    I want btc vendor shop where i can sell stuff 100% anonymous hidden on tor. You will setup the website and hosting on TOR.

    $160 (Avg Bid)
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    4 bids

    Please look at the attached document and contact us to discuss the work! The exchange needs to built in C++. You need to know security, block chain and how to work with it. Up to 10 market parings (BTC, ETH, LTC, XRP, BCHSV and, USDC or other ERCtokens / List an option for favorites pairings for customers.) May add more coins Connecting the 10 API from foreign Exchanges such as: Binance / [logi...

    $3471 (Avg Bid)
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    39 bids
    Ethereum - Solidity help 5 days left
    VERIFIED

    I need help with a lottery dapp -can I generate an array of 15 random numbers to create a ticket for the buyer -generate 40 random numbers for the game round. Can I return a dynamic array with all the numbers and does it cost a lot of gas to call the function to generate each of every time

    $17 (Avg Bid)
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    2 bids

    i need a cryptocoin bot that can handle arbitrage between cryptoexchanges. recently a developer worked for this project but he had health issues and left the project Bot %60 finished but not completed, frontend is nearly complete, all codes are in Digital ocean droplet server and it works partly, have 3 cryptocoin exchanges and 15 coins integrated. - job description and details are here [login to...

    $473 (Avg Bid)
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    16 bids

    Hello, We are interesting in launching a Cryptocurrency Exchange feature our own ERC-20 listings that would not be listed on our exchanges. As such we need our own Order Management System that could support our own network of market makers. We also need to support some of the major coin trading pairs and integrate with a major exchange for liquidity. However, this is our secondary requirement, n...

    $16225 (Avg Bid)
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    39 bids

    developer required to teach basic things on bitcoin. you should know and have developed crypto currency. I will take one hour session to clear some logics and tech support. thanks

    $1816 (Avg Bid)
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    4 bids

    A coin with its own block-chain (not a ico!) Ripple like: - Fast and fully anonymous - All coins are pre mined - You provide me with a panel that i can set coin symbol, Name, Amount of total coins and ect.. - you train me to any future maintenance if there is any. - You provide me with an explorer to the coin block chain. - Wallet (Desktop not Cloud) for pc windows that can store also other coins.

    $1253 (Avg Bid)
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    24 bids

    I want to develop virtual currencies like Bitcoin. I want proven sources that have been developed. (Full Solution)

    $15122 (Avg Bid)
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    31 bids

    Hi my company is about to start an ICO within 2 weeks (30th of November 2018) I need to list my ICO on token exchange platforms, such as - [login to view URL] - [login to view URL] - [login to view URL] - [login to view URL] - [login to view URL] - [login to view URL] I need support to do this, with a special attention over the issue of KYC and AML

    $3101 (Avg Bid)
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    14 bids

    I want to start a company for ASIC mining chips...need engineers and software developers.

    $1720 (Avg Bid)
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    14 bids

    I am looking for someone who can come up with an idea to increase the trading volume on a cryptocurrency exchange.

    $129 (Avg Bid)
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    6 bids

    I need bitcoin mining hardware with very TH per hour

    $6057 (Avg Bid)
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    18 bids

    I want to develop a proof of stake cryptocurrency with masternode probably a fork of PIVX including a qt wallet and develop an API for merchant to receive payments.

    $912 (Avg Bid)
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    19 bids

    We are looking to purchase source code for an ICO platform. We are not interested in developing a platform ourselfes, we just want to buy source code for a platform, that is already finished and fully functional.

    $1447 (Avg Bid)
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    35 bids
    Master Node Complete Project! 3 days left
    VERIFIED

    Master node coin Developer! I'm looking blockchain developer who can fork DASH. You must have to have experience! Submit your previous project link! Without a link, I won't reply to your message whatever you submit!

    $1322 (Avg Bid)
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    24 bids

    I need some Python developer experience with CCXT to help me finish automatic buy of my arbitrage cryptocurrency bot and speed it 40%.

    $143 (Avg Bid)
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    3 bids

    I'd like to build a trading engine with using REST API. These are the optional api service what I am thinking of. - [login to view URL] - [login to view URL] - [login to view URL] I wish to develop a trade engine based on rest api preferrably, I have to develop and plug/play existing module to existing backend system. Trading Engine Specs - Node.js as api server - Mongo as database Pleas...

    $700 (Avg Bid)
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    15 bids

    I need a develop to develop a cryptocurrency exchange website for me details will be sent to you via inbox

    $997 (Avg Bid)
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    33 bids

    I need a vendor shop that uses PGP encryption, bitcoin block chain. I can list items for sale and people may purchase via bitcoin. Then host this on the tor where i can enter onion URL and access website. Admin features and client feature aswell.

    $200 (Avg Bid)
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    14 bids

    I've been tasked with writing a detailed piece for a major online publication on Bitcoin and cryptocurrency users, and am seeking two current users of Bitcoin for interview. Pay is fixed at 100USD via Freelancer for successful candidates. Interview is in three parts; 1) Qualifying questions 2) Preliminary discussion 3) Main interview task Questions will include ones similar to this; Do you...

    $137 (Avg Bid)
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    14 bids

    I want to build smart contract of erc 20 token with all pre mined token.

    $1727 (Avg Bid)
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    14 bids

    The PoC is already developed for a healthcare organisation, the authority of data provided by the patient is to be set. Only who has worked on Hyperledger fabric shall bid.

    $31 (Avg Bid)
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    1 bids
    Mining machine 1 day left

    from Antminer A3 to ObeliskSC1 firmware version update , or A3 to Lyra or quirk or Scrypt , as successful to do if you can than please do as soon as possible

    $9166 (Avg Bid)
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    2 bids
    Mining machine 1 day left

    from Antminer A3 to ObeliskSC1 firmware version update , or A3 to Lyra or quirk or Scrypt , as successful to do if you can than please do as soon as possible

    $5472 (Avg Bid)
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    4 bids

    I need a fully secure Cryptocurrency exchange open for customers in India with a few currencies already listed on it and should be equipped with full KYC.

    $656 (Avg Bid)
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    16 bids

    Looking for a core wallet system for Ethereum, XRP, and ERC token system. The wallet will need to generate new address for users and it must be installed and tested correctly with no security flaws. It would be preferred if you know C++. and have solid security background.

    $437 (Avg Bid)
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    13 bids

    The requirements are been attached and bid only after reading the document ! The entire project is been already opensource where you need to run the opensource git and then customize few changes. *** Again Bid only those whom really can work on this ***

    $206 (Avg Bid)
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    8 bids

    Hi, I thus need only experts who have already with with mining pools ! The requirements are been attached and bid only after reading the document ! The entire project is been already opensource where you need to run the opensource git and then customize few changes. *** Again Bid only those whom really can work on this ***

    $18 / hr (Avg Bid)
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    7 bids
    Cryptocurrency Arbitrage Bot 5 hours left
    VERIFIED

    I need some Python developer experience with CCXT to help me finish automatic buy of my arbitrage cryptocurrency bot.

    $53 / hr (Avg Bid)
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    20 bids
    Create a new Crypto Currency 38 days left
    VERIFIED

    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.

    $3422 - $5704
    Featured Sealed NDA
    $3422 - $5704
    58 bids

    Complete betting website from our available APIs. Parts to be built include: FRONTEND - bets include: sportsbook, live betting, slot, game, casino ... with the odds we provide - personal account of the customer, through password, bitcoin address - bitcoin address - bitcoin deposit, withdraw, history betting - advertising, promotion from company - contact, message for customer BACKEND ...

    $2983 (Avg Bid)
    Featured
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    18 bids

    I need some Python developer experience with CCXT to help me finish automatic buy of my arbitrage cryptocurrency bot.

    $23 / hr (Avg Bid)
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    4 bids

    Quisiera Vender mi proyecto ya Finalizado de una App que ayuda a vender o comprar BTC ya Operativo envia Notificaciones en base de los parametros que se le coloquen, Solo necesito saber si hay alguna persona interesada para Venderlo o Asociarnos.. Es importante señalar que este Sistema ya esta en uso Por un grupo de Trader lo cuales comprar suscripcion por el uso

    $438 (Avg Bid)
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    4 bids

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