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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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プロジェクト / コンテスト 詳細 入札 / エントリー スキル 開始日 終了日 価格(JPY)
premining pow/pos masternode coins which i created Hello. i need to premine my own coins. i don't know how to premine. i am looking a freelancer who can premine my coin. Thanks 3 暗号化, ビットコイン, Ethereum Apr 19, 2018 本日6日 19時間 ¥46826
Android and iOS blockchain app needed ASAP I need an Android and iOS app. I would like it designed and built. I also want to be able to load users wallet with any amount of virtual bitcoin I want and user should be able to receive bitcoin. 36 Mobile App Development, Android, ビットコイン, Blockchain Apr 19, 2018 本日6日 18時間 ¥74643
Android Blockchain App I need an Android app. I would like it designed and built. The app should be like blockchain or coinbase . users should be able to create wallet and receive bitcoin and ethereum on it and also send out . 30 Mobile App Development, Android, ビットコイン, Blockchain Apr 19, 2018 本日6日 17時間 ¥75609
Add Cryptocurrency Payments to an AirBnB PHP Script Hello! i have purchased this AirBnB PHP script and I would like to strip it from its current payment methods and add cryptocurrency payments support for Bitcoin, Bitcoin Cash, Ethereum and Monero. Both parties will need to have crypto wallets. The payments will be made via escrow, and the platform will be getting a percentage of the renting fee. Previous experience in Blockchain required! For... 20 PHP, ビットコイン, Blockchain, Ethereum, Web Development Apr 18, 2018 本日6日 11時間 ¥76146
Selling a promising idea in the bitcoin industry. I have an idea related to bitcoin, creating a promising product in which people will invest good money (this is a very useful product for our world). The project is promising, there is a full plan for implementing the idea, all positive and negative qualities of the product will be transferred to the future owner of a successful company. 10 PHP, ウェブサイトのデザイン, eコマース, HTML, ビットコイン Apr 18, 2018 本日6日 7時間 ¥76039
bitcoin mining and investment Hello there, I am a highly skilled account manager/miner looking for a serious person i can trade for. The great thing with Bitcoin Mining is that you can win every hour 80-90% on your money. I have a strong track record of winning on this type of trading. You can trade the forex, options, gold, bitcoin.... I do not need someone who does not know what Binary Options are. Have you ever ... 5 メタトレーダー, ビットコイン Apr 18, 2018 本日6日 6時間 ¥79905
Trading and bitcoin expert To make sure everybody fully understands what I am expecting I will explain it now in details and I hope you all read it to the end. You need to be experienced with blockchains, bitcoins and trading platforms. So , all i need now are 100$-500$ in btc . Im ready to pay here almost double for the amount you can provide me there. Also im ready to pay here first the milestone for sure ., then you c... 7 ビットコイン, コピーライティング, CSS, eコマース, レポートライティング Apr 18, 2018 本日6日 6時間 ¥22876
Bitcoin Exchange like Coinbase with algorithm We have a very profitable strategy for trading bitcoin on the 15 minute charts. We want to provide an app which trades this strategy automatically for customers. The app would buy and sell btcusd according to the algorithm. It needs to look like coinbase be simple to use and to have the bitcion managed by the bot making a simple consent and agree box. 21 ビットコイン Apr 18, 2018 本日6日 1時間 ¥135429
Need help understanding cryptocurrency ERC20 token creation tutorial, troubleshooting potential error Hello, I've followed the following tutorial titled "How absolutely anyone can create a cryptocurrency in 60 seconds" exactly, but cannot 100% get it to work. In MyEtherWallet when I try to view the created Token it states "(error_21) Not a valid ERC-20 token" -- Please could you test the tutorial advising where the error is? How can I see the created token balance, and th... 1 ビットコイン, Blockchain, Ethereum Apr 18, 2018 Apr 18, 20185日 20時間 ¥2083
Cryptocurrency Code Maintenance Looking for crypto expert or team to assist in evaluating, improving, upgrading, and maintaining the code of an existing popular alt-currency. Need review and maintenance of existing code and recompiled wallets for Windows, MacOS, Linux versions. This is a Bitcoin variation, not Ethereum. Should be experienced with cryptocurrencies, C, C++, Blockchains, QT, Agile, Github, Masternodes, wallets. A p... 19 C++プログラミング, ビットコイン, Qt Apr 17, 2018 Apr 17, 20185日 13時間 ¥153689
Assistants with decent English needed I have tons of works to handle so I need an assistant. Successful candidate should have proficiency with computer. Should have fluency in English and Male assistants preferred! 62 情報処理, データ入力, ウェブリサーチャー, コピータイピング, ビットコイン Apr 17, 2018 Apr 17, 20185日 10時間 ¥1933
Bitcoin Paid Surfing Site Looking for a developer that can create a site just like clixcoin. Users should be able to surf ads for crytocurrency and advertisers pay in cryptocurrency. 16 PHP, Javascript, ウェブサイトのデザイン, HTML, ビットコイン Apr 17, 2018 Apr 17, 20185日 9時間 ¥43819
Data 'Input & Output' application, done on ETH blockchain smart-contract We are looking for ''Full stack Ethereum Blockchain Developer & or Developer Team''. The entire APPLICATION process will work totally depending on the Ethereum blockchain, as that is what most of the already deployed code does. NO TOKENS should be made at all because this would just complicate the process, and, by our current understanding & research does not co... 24 Javascript, パイソン, ビットコイン, Blockchain, Ethereum Apr 17, 2018 Apr 17, 20185日 8時間 ¥278810
PHP Developer required for Existing Cryptocurrency Exchange Looking for a developer experienced in PHP Laravel framework to complete an existing Cryptocurrency exchange web app. Need to fix a few functions on the web application. Please reach back for more information 57 PHP, ソフトウェアアーキテクチャ, ビットコイン, Laravel, API Apr 17, 2018 Apr 17, 20185日 6時間 ¥1504
Development of Decentralised Cryto Exchange I want to develop a Decentralised Cryptocurrency Exchange using [URLが削除済みです、ログインして表示してください] These are the details. Project Managers don't apply. Only those going to do the work apply. _________________________________ ​ Decentralised Cryptoexchange We will be registered reporting institution to authorities as requested. . Deposits/ Withdrawals . Deposit using BTC. Minimum Deposit ... 22 PHP, ソフトウェアアーキテクチャ, MySQL, HTML, ビットコイン Apr 17, 2018 Apr 17, 20185日 ¥163085
Need a simple faucet script for altcoin As mentioned in the title, i need a simple faucet scrip for an altcoin. The script should only have a field to enter a wallet address and a submit button with captcha. The scrip needs to prevent abuse by restricting the number of payouts per day by detecting the IP address. It must be created in php. Design is not required. Simple as that. To be sure that you have read the requirements start yo... 5 PHP, MySQL, ビットコイン, Blockchain, Ethereum Apr 17, 2018 Apr 17, 20184日 23時間 ¥4403
Crypto Coin with masternode i want to create coin with reward masternode system 6 アルゴリズム, ビットコイン, Blockchain Apr 17, 2018 Apr 17, 20184日 22時間 ¥69380
Cryptocurrency POW POS + Masterdnood Looking for blockchain dev , who will be able to assit to make new fork of cryptocurrency based on one of mining algo with Masternodes or, POS + Masternodes 37 C++プログラミング, ビットコイン, Blockchain, Ethereum, Full Stack Development Apr 17, 2018 Apr 17, 20184日 20時間 ¥162496
node.js, ビットコイン, Ionicフレームワーク, Payment Gateway Integration, API Apr 16, 2018 Apr 16, 20184日 15時間
Create Payment Gateway CryptoCurrency - RPC Hello, We looking an expert in RPC and PHP / NODE.JS with good knowleadge of crypto currency for create an simple payment gateway for Bitcoin / Etherum, Ferrum coin and Numus coin, like this : [URLが削除済みです、ログインして表示してください] We want allow visitor of an website pay in, ferrum or numus coin and the owner of website or seller of product receive the payment. We will hire only expert with goo... 21 PHP, node.js, ビットコイン, ソケットIO, Ethereum Apr 16, 2018 Apr 16, 20184日 13時間 ¥45967
Daemon instance 0 rejected a supposedly valid block Hello. i am going to make pow/pos masternode coin. i have changed only some parameters from basic coin. And i have installed nomp pool on vps server. when i mine coins in pow phase, nomp says that "Daemon instance 0 rejected a supposedly valid block. " All block was rejecting now. [URLが削除済みです、ログインして表示してください] says as follows: ERROR: CheckBlock() : first tx is not coinbase ERROR: ... 3 Linux, 暗号化, ビットコイン, Ubuntu, Ethereum Apr 16, 2018 Apr 16, 20184日 12時間 ¥70669
Bitcoin wallet iOS and Android App I am looking for a professional bitcoin developer to design and build my bitcoin wallet application. You should have experience working with bitcoin project and blockchain. Apply with clear and detailed explanation on how you will do this job by answering their questions. 1. Describe the architecture you will use 2. hosting service you will use. 3. programming languages you plan to use 4. Wallet... 24 ビットコイン, Blockchain Apr 16, 2018 Apr 16, 20184日 11時間 ¥325744
Bolinger Band Bot for GDAX Looking for a bot that will trade on Bolinger Band levels, RSI levels and MACD levels. Would like to trade in 15 minute intervals at most. 8 暗号化, ビットコイン Apr 16, 2018 Apr 16, 20184日 6時間 ¥133605
SEO Article on Ontology Need someone who knows Ontology Network in depth. Looking for long term writer. 4 ウェブサイトのデザイン, 暗号化, HTML, ビットコイン, Blockchain Apr 16, 2018 Apr 16, 20184日 ¥3544
Ethereum Smartcontract Development Hello there, We need solidity developer who is having good experience in developing ethereum smart contracts. start your reply by mentioning "i read this" to make sure you really read my requirement. Thanks 10 PHP, HTML, ビットコイン, Blockchain, Ethereum Apr 16, 2018 Apr 16, 20183日 20時間 ¥18151
Bitcoin Simulator Game on Unity I need someone who have bitcoin [URLが削除済みです、ログインして表示してください] is because we have to test using by wallet. Let me know if you have bitcoin wallet and very familiar with gaming using bitcoin. 15 PHP, C#プログラミング, ソフトウェアアーキテクチャ, ビットコイン, ゲーム開発 Apr 16, 2018 Apr 16, 20183日 17時間 ¥3759
Fix the problem of Electrum Api on PHP and Linux Hi everyone. I'm looking for an experienced developer in Electrum Api. Electrum Api was installed on the VPS(Ubuntu 16) and i saw an code error. ***u will see error -----START DIGITAL SIGNATURE-----*** Electrum API returned error: `Server error: File "/usr/local/lib/python3.5/dist-packages/electrum/[URLが削除済みです、ログインして表示してください]", line 135, in pw_decode | [URLが削除済みです、ログインして表示してくだ... 11 PHP, Linux, ソフトウェアアーキテクチャ, ビットコイン, Ubuntu Apr 16, 2018 Apr 16, 20183日 17時間 ¥11707
Understand how Bitfinex calculates transactions? By adding all of my transactions that the API returns, I can not find the result that I have in my balance. Example with IOTA: My balance is 281.64315651000 IOTA (return by /v1/balances) List of transactions (return by /v1/mytrades): [ {"Price": "0.0002993", "amount", "79.28790511", "timestamp", "1513796864.0", "type&qu... 1 メタトレーダー, 暗号化, ビットコイン, Blockchain, Ethereum Apr 15, 2018 Apr 15, 20182日 21時間 ¥14755
Blockchain Expert Required Urgently I need multipool server with next coins: ETH - ETP - PIRL - EXP - MUSIC - UBQ - ETC – ELLA Also i need next coins: Monero (CryptoNightV7) i Zcash (Equihash) If not possible to put all on one server well we install on 2 servers First coins is all ethash coins and i pretty sure can be on one server Other coins is cryptonight and Zcash… Server must be qualitative&nbs... 13 PHP, システム管理, Linux, ビットコイン, Blockchain Apr 15, 2018 Apr 15, 20182日 18時間 ¥270816
small platform integrate with binance cryptocurrency small platform integrate with binance cryptocurrency the propose of this platform allow the user to trade via binance api based on my trade advise for the they user. 13 パイソン, ソフトウェアアーキテクチャ, ビットコイン Apr 15, 2018 Apr 15, 20182日 18時間 ¥43604
Ledger Nano S Support for Neutron Coin Looking to get Ledger Nano S Support for Neutron Coin. 9 ビットコイン, Coding, Blockchain Apr 14, 2018 Apr 14, 20182日 14時間 ¥122543
Blockchain Need someone who can incorporate Blockchain 18 オラクル, ビットコイン Apr 14, 2018 Apr 14, 20182日 7時間 ¥338632
Crypto Price Prediction Game A Cryptocurrency price prediction game where a user can bet on major cryptocurrencies like Bitcoin, Ether, Litecoin, DigitalCash and Monero and see where their prices go in the short term. The game results are recorded in cookies, so you will be able to continue from where you stopped last time. Demo: [URLが削除済みです、ログインして表示してください] My requirement: I want users to play this game by betting rea... 15 PHP, CSS, ビットコイン, Blockchain, Ethereum Apr 14, 2018 Apr 14, 20182日 6時間 ¥159918
Need a crypto dev for a game You must be an experienced developer in cryptos. You must have worked in cryptos before. You will do backend and frontend. You must have experience with design. You will have to edit casino scripts too, so you must have knowledge in casinos games. Cryptos experience : BTC ETH LTC BCH XMR DOGE NANO NEO VERGE VEN OMG XLM Not interested to use 3rd party site as gateway to manage deposit / wit... 21 PHP, Javascript, 暗号化, ビットコイン, Ethereum Apr 14, 2018 Apr 14, 20181日 21時間 ¥706099
Industrial Blockchain Technology Development Please read the job description below very well before you bid. Understand the requirements clearly. If you are capable of performing the task and have the right experience, then send in your comprehensive technical proposal, detailing all features of the blockchain and processes with costing. We are looking for Blockchain developer who can develop an industrial Blockchain Technology specially en... 32 CSS, C++プログラミング, ビットコイン, Blockchain, Ethereum Apr 13, 2018 Apr 13, 20181日 10時間 ¥3724090
Stellar.org Blockchain Creating BTC/EUR exchange and BTC Anchor I am planning to create a certified anchor of BTC and EUR on the Stellar blockchain. 13 PHP, ウェブサイトのデザイン, ソフトウェアアーキテクチャ, HTML, ビットコイン Apr 13, 2018 Apr 13, 20181日 9時間 ¥1878
Core team members for an ICO cryptocurrency Hi mates. We are now looking for remote core members for our upcoming ICO. We have already built our platform with all of outstanding tools and marketing plans to make our ICO successful, include spamming, spreading, creating FOMO by a crowd, etc.. We now are in need of - 2 Blockchain Developer : Who knows well about blockchain, you will give us your ideas about blockchain improvement and its ... 36 PHP, グラフィックデザイン, インターネットマーケティング, ロゴデザイン, ビットコイン Apr 13, 2018 Apr 13, 20181日 6時間 ¥51754
Project for Bogdan S. Hi Bogdan S., I noticed your profile and would like to offer you my project. We can discuss any details over chat. 2 アルゴリズム, , ビットコイン, Angular.js, Blockchain, Ethereum Apr 13, 2018 Apr 13, 20184日 2時間 ¥26850
Online Payment service i need online payment service 100% like [URLが削除済みです、ログインして表示してください] please check this site. have 2 panel. Admin Agent Admin: agent list and more data like reedem voucher code or buy voucher code ,... and more option agent: buy voucher code(by perfectmoney , webmoney , paypal ,...) see buy/sell(reedem) ,... voucher Type (USD , ERU , BTC , .... all unit) all voucher code is... 19 PHP, MySQL, Yii, ビットコイン, Payment Gateway Integration Apr 12, 2018 Apr 12, 20189時間 53分 ¥33509
I need a bitcoin expert I will discuss with candidates in detail 29 PHP, ウェブサイトのデザイン, ソフトウェアアーキテクチャ, HTML, ビットコイン Apr 12, 2018 Apr 12, 20183時間 49分 ¥75609
I want you to create a new cryptographic currency with open source, based on ethereum Hello. I want you to create a new cryptographic currency with open source, based on ethereum. GitHub license You will develop the solution Crypto ICO (Initial Coin Offering): trade, lending, affiliate marketing. Bitcoin Wallet Development, Crypto Coin Creation, Crypto Coin Mining, Bitcoin Pool Mining, Crypto Coin Explorer, Development of monetization, Coin Web Wallet, Blockchain Develop... 27 PHP, C プログラミング, ソフトウェアアーキテクチャ, C++プログラミング, ビットコイン Apr 12, 2018 Apr 12, 20182時間 30分 ¥101171
Build MLM binary website using Bitcoin payment gateway Need to build MLM binary website that has investment plan Compensation plan only have 2 type of bonus, direct referral and binary For investment, admin can set variable interest daily and will display at user dashboard Deposit and withdrawal using Bitcoin and ETH only Please bid if you have already build MLM website. And demo is must, strictly for developer who has build MLM website and able... 27 PHP, MLM, MySQL, HTML, ビットコイン Apr 12, 2018 Apr 12, 20181時間 54分 ¥308452
ERC 20 Token for ICO with contract I need an ERC-20 token created with contract and must be verified on etherscan. will give you details of token in chat. ***ONLY BID if you have created tokens before 27 暗号化, ビットコイン, Blockchain, Ethereum Apr 11, 2018 Apr 11, 2018終了 ¥77666
ICO expert needed Tell me what talents and insights you have to offer. 6 広告, ビットコイン, Blockchain, Ethereum Apr 11, 2018 Apr 11, 2018終了 ¥11492
Build Ethereum based Token I need a token based on Ethereum and also need trading and exchange of cryptocurrency. I will prefer the candidate or a team who have done the similar project and have source code ready. I need it ready within 2 Days. I need it on my server till tomorrow morning. I will reject the automated bids. Please write 'Hello Srinivas' on the top of the bid. 10 node.js, ビットコイン, Angular.js, Blockchain, Ethereum Apr 11, 2018 Apr 11, 2018終了 ¥829897
Ethereum token creation Erc20 tokens I need erc20 token created for my site. I need 500,000,000 tokens created and sent to my ether address. 17 ビットコイン, Blockchain, Ethereum Apr 11, 2018 Apr 11, 2018終了 ¥46748
Litecoin/Loafwallet Fork Troubleshoot an issue We are running a fork of loafwallet and it's stopped syncing the blockchain after 2016 blocks (difficulty boundary).  It seems the SPV client doesn't like the block headers it is getting from the full node.  The setup is working fine on our testnet build, but not on mainnet. [3:01 PM] Chris Horn: Seems to be a problem with [URLが削除済みです、ログインして表示してください] the debug log ... 2 ビットコイン, Blockchain, Ethereum Apr 10, 2018 Apr 10, 2018終了 ¥65621
ICO advertiser We are getting ready to launch an ICO and we are looking for someone that knows how to do the advertising. Please contact us. 7 広告, ビットコイン, Blockchain, Ethereum Apr 10, 2018 Apr 10, 2018終了 ¥11492
Writer with in-depth knowledge of cryptocurrencies and philanthropy Hi there! We are looking for an experienced writer for a recently established platform/news outlet that focuses on the benefits of cryptocurrencies for non-profit organizations and people living in poverty. The main goal of this platform is to facilitate charitable giving within the crypto space by helping and inspiring cryptocurrency holders to identify and send crypto donations to non-profit ... 16 研究の執筆, 資金調達, ビットコイン, コンテンツライティング, Blockchain Apr 10, 2018 Apr 10, 2018終了 ¥2600
Need Russian Lawyer to get back 4.5 Bitcoin from Wex.nx (previously BTC-E.com) Need Russian Lawyer to get back 4.5 Bitcoin from [URLが削除済みです、ログインして表示してください] (previously [URLが削除済みです、ログインして表示してください]). Got account locked over 2 months ago. They tell me upload verification documents which I did. Account is still locked and now they only keep sending me automated email responses, which goes no where. Now need lawyer to contact them direct and get back my 4.5 Bitcoin. T... 3 翻訳, 契約, ロシア語, ビットコイン Apr 10, 2018 Apr 10, 2018終了 ¥425518
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