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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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    569 jobs found, pricing in USD

    I have to exchange my balance here (which is more then 700$ ) into bitcoins in a simply and secur Transfer. Im unfortunaly unable to withdral my founds from here,just because im a new user and have to wait some day to verify my Profil completly. So my mistake was that ive just deposit all of that i has in my card here, so as you thing i donthave anything next days im gonna pay double in advance someone who will provide me with BTC and will leave recommendet feedback! Advanced Payment will be release if you proved me with Bitcoins. Payment method can be only here!

    $295 (Avg Bid)
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    1 bids
    Trophy icon Mining Consultant Required 6 days left

    Mining Expert required to help with cost analysis and to produce an options paper describing best ways to mine for Crypto currencies. - Methods (mobile, onsite, IaaS) etc. - Returns. - Detailed solution including apps and h/w requirements. OPEX/CAPEX costs.

    $50 (Avg Bid)
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    Trophy icon Provide me with bitcoins 2 days left

    Hi there all i need is 100$ in my Bitcoin ac , im ready to pay here 170$ UPFRONT contact me ! URGENT ! ! !

    $47 (Avg Bid)
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    1 entries

    i need expert developer for make solitary contract on ether network . i need full contract with all fundtion and market and exchange methods. plz expert bid max budget 200$

    $179 (Avg Bid)
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    10 bids

    Looking for expert cryptocurrency miner and programmer. Who has good knowledge and experience in blockchain programming, ICO, Token, Smart Contracts and related etc

    $818 (Avg Bid)
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    15 bids

    What i need is : •A secure Crypto website that accepts deposits from the public and store their coins •A payment network which let them transfer crypto-currencies to each other fast and securely Secure Crypto Wallet Abstract Virtual currencies and mobile banking are technology advancements that are receiving increased attention in the global community because of their accessibility, convenience, speed and growth rate. However, this popularity comes with growing security concerns, like increasing frequency of identity theft, leading to bigger problems which put user anonymity at risk. One possible solution for these problems is using cryptography to enhance security of Bitcoin or other decentralised digital currency systems and to decrease frequency of attacks on either the communication channels or the system storage. This report outlines various methods and solutions targeting these issues and aims to understand their effectiveness. It also describes Secure Crypto Wallet, standard Crypto transactions client, enhanced with various security features and services. Project Proposal Workflow ·Every user registers to website with respect to his/her unique ID gets multiple crypto wallet address, which they will use for deposits (Confirmed by respective Blockchains) ·Every Deposit is credited after 3 successful confirmations on respective blockchains ·Users can generate any number of address through their profiles (all address will be linked with their unique ids) ·Each user get a unique address for every crypto to do internal transactions (which will be fast and without any blockchain fee) ·For an extra security measure, users can add google authentication to their withdrawals and logins, although 2FA email security measure will be forced on every profile. ·Users Dashboard: o A settings page where users can update their profile settings (Attributes to be provided) o Balance page to show up their current BTC, LTC & ETH balance o Transaction pages for each crypto-currency Project Proposal : Admin Panel ·Admin have access to all users wallet to update profile details. ·To approve all withdrawals admin have to approve from their panel ·Admin can ban/hold any account for whatever time they want – they can start it back too. ·Website pages can be updated by super admins only ·Admins can update latest news on website front page ·Users balance can not be updated from admin panel, it have to be updated from database.

    $1228 (Avg Bid)
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    Through this app, users can buy and sell Bitcoin, Litecoin, Ethereum, Dash, Bitcoin Cash . - Main functionality would be managing data from and to the app, from admin, user and database. - Sending of coin transactions would be done by admin manually. He will only enter transactions id which would then stored in database, thus would be visible to user. - Reading blockchain for Deposits. Kindly do share your previous work with Bitcoin and cryptocurrency in your proposal, preferably exchanges. Project Scope : API from server to app, Admin Panel, Android, iOS I will share detailed document with chosen freelancers.

    $2766 (Avg Bid)
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    28 bids

    Dear we need Block chain developer for x11 coin. Coin already functional and we need split block reward in to three parts. 1: 45% to miners who will mine. 2: 45% will equally divide wallets who have 1000 Coins 3: 10% to self development wallet we need Block chain experienced developers, we don't deal on BTC or any other currency or platform.

    $8554 (Avg Bid)
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    10 bids
    digital selling forum needy 6 days left
    VERIFIED

    What I need is simple, a system of deposit in guarantee for some system of forums where the users can load money to their accounts (bitcoin, altcoin) and open requests of deposit in guarantee with other members of the forum and can release disputes or cancel the event. I also need to have a feedback system Basically the idea is to create a forum where users can sell their digital products, if possible they can upload their material to the same forum. We will work with blocktrail api. On the other hand it is necessary that the system allows me to configure a fee per operation, by deposit and withdrawal of altcoins, bitcoins. that has 2fa is paramount, security is a priority. If a user wishes to become a provider or seller, he / she must pay a monthly, annual, weekly or a fixed time fee. On the other hand, I need to register a user must pay a fee for only once to reactivate the account alone. I would need this as soon as possible.

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    Hello concurrency developer, We want to create mining pool same as [url removed, login to view] send your proposal in detail with corporate format. We do not accept without proposal. Thank You....

    $11348 (Avg Bid)
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    Hello, I need a professional programmer to make a bitcoin wallet website for me . A very professional script and smooth to use . Something smiliar like [url removed, login to view] or [url removed, login to view] Anyone Can do that ? Thank you,

    $2015 (Avg Bid)
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    I want an initial consult with a professional who can tell me what is required in the design and security of a website that you would create to provide users the ability to trade between cryptocurrencies?

    $35 / hr (Avg Bid)
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    27 bids

    Looking for block-chain developer and cryptocurrency expert. Someone who has proven expertise in bitcoin

    $29 / hr (Avg Bid)
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    25 bids

    We are looking for someone who does have an impeccable expertise in creating Cryptocurrency wallets ,namely BTC,ETH,RIPPLE,LITECOIN,IOTA,BITCOIN CASH.

    $1160 (Avg Bid)
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    8 bids
    bitcoin and etherium job 6 days left
    VERIFIED

    I need someone trustworthy for a long time job

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    Trophy icon Bitcoin Guru Required 6 days left

    Altcoin/Bitcoin specialist required to help understand and develop POC's for Mobile apps/SW to mine for Crypto currency and auto deposit into bespoke eWallets (with additional functionality). - Processing power. - Infrastructure requirements and API interfaces. - ROI. - Architectural diagrams. - Limitations and constraints. - Legalities. - Implementation (CAPEX) and OPEX costs. - Alternative solutions inc. using IaaS. We will need all of this to build a business case to continue with project which will fund further activities. ***Selected bidder will need to provide a NCA*** Good luck and we look forward to your bids.

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    digital currency on the basis of bitcoin.

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    bitcoin stock market 6 days left
    VERIFIED

    we will monitor all stock exchange software

    $119 (Avg Bid)
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    Looking for a blockchain educator/instructor to create online video courses. Each course will be about one hour long. Course topics may include information about Crypto Currencies, Blockchain, ICOs, Crypto Trading, etc. Content should be in English.

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