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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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    Bitcoin mixer 6 дні(-в) left

    Need a bitcoin mixing website that runs on both clearnet and tor. It must mix bitcoins and able to swap bitcoins for monero in an instant. Examples: [увійдіть, щоб побачити URL] [увійдіть, щоб побачити URL]

    $2564 (Avg Bid)
    $2564 Сер. заявка
    28 заявки

    Hello, I need someone familiar with buying Bitcoin to check my purchases made on the coinbase site. I'll provide screenshots. I'm puzzled as to why my Portfolio Value doesn't increase each time I buy. I've contacted customer support several times and the best they can do is to tell me "Price goes up and down" and "All your transactions are listed in your account...

    $18 (Avg Bid)
    $18 Сер. заявка
    4 заявки

    We need our own cryptocurrency coin created for a new project. Needs to be POW and POS with masternodes. Ideally based on either Dash, PIVX or Zencash. If you can do project based on Loki or Zencash, Horizen let us know. You must have experience in creating similar coins before and show proof of work that you have done so. Share links to us and your github links. We need wallets for Linux, ...

    $1558 (Avg Bid)
    $1558 Сер. заявка
    7 заявки

    hi dear i want some one for setup and configure cryptocurrency systems my mean i want some open source project i founded in github send to him and he install and configure that for me or if i want some feature , he add on for me please just you know fully on cryptocurrency send bid in project if you don't know please don't send for now i want this system to installing : [увійдіть, щоб...

    $189 (Avg Bid)
    $189 Сер. заявка
    7 заявки
    optimize,debug my script on node.js with restapi -- 2 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    Have a script that works on nuxt envoriment on node.js it trades with two crypto exchanges by restapi , it connects to exchanges with keys and can make trades following functions but somehow some of trades it should have done is missing, not always occuring but sometimes it misses trade orders, your job is to find why this is happening, fix codes and optimize workflow, exchanges are working well, ...

    $200 (Avg Bid)
    $200 Сер. заявка
    16 заявки
    optimize,debug my script on node.js with restapi 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    Have a script that works on nuxt envoriment on node.js it trades with two crypto exchanges by restapi , it connects to exchanges with keys and can make trades following functions but somehow some of trades it should have done is missing, not always occuring but sometimes it misses trade orders, your job is to find why this is happening, fix codes and optimize workflow, exchanges are working well, ...

    $431 (Avg Bid)
    $431 Сер. заявка
    19 заявки
    BITCOIN SIMPLE SHOP 5 дні(-в) left

    Hi for all ! i need super simple shop that accept BTC payment using blockchain api in php ! i need only one product to sell (my product is a serial number format in jpg). after buyer made the payment succesfull it will apper in browser the jpg with serial number . please see the picture attached to this project.

    $234 (Avg Bid)
    $234 Сер. заявка
    23 заявки
    Blockchain/Crypt and Exchange Developer 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    Looking for blockchain and crypto developer who can work on current already developed blockchain and make some adjustments to it. You must also be expert in creating wallets out of blockchain code and it will be a big plus if you have created ICO and Cryptocurrency Exchange sites.

    $514 (Avg Bid)
    $514 Сер. заявка
    17 заявки
    Basic Messaging Application using Hyperledger Fabric. 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    I want to have a very basic application created to demonstrate basic usage of Hyperledger fabric. I want an application that allows users to send each other messages. 1. Needs to use Hyperledger Fabric 2. Every message that is sent would be an Asset 3. Ability to retrieve messages sent to you or sent by you 4. You only have access to the messages that are sent to you or you sent yourself I am ...

    $435 (Avg Bid)
    $435 Сер. заявка
    15 заявки
    Build a Bitcoin donation website 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    Build a secured, mobile friendly Bitcoin donation website that will have a minimum daily traffic of over 100

    $155 (Avg Bid)
    $155 Сер. заявка
    23 заявки
    YEP COIN GATEWAY -- 2 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    I am looking for a person to develop a Gateway for credit card and PayPal in order to pay a crypto currency. Communications with the wallet are done in RPC. The gateway will need to be integrated into a website.

    $624 (Avg Bid)
    $624 Сер. заявка
    15 заявки
    php bitcoin cit core API 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    We are looking for bitcoin (bitcore api) developer to build simple code then to build a full node. We also are looking to add you to our team.

    $4 / hr (Avg Bid)
    $4 / hr Сер. заявка
    9 заявки

    Blockchain Developer needed to develop a secure and decentralized file transfer application.

    $500 (Avg Bid)
    $500 Сер. заявка
    14 заявки
    Create simple erc20 toke and deploy 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    create and deploy erc20 token. Send ownership and tokens to me

    $39 (Avg Bid)
    $39 Сер. заявка
    11 заявки
    Simple cryptocurrency music download site for one song 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    Need a very simple site where users can download an mp3 file. They will have the choice of bitcoin, Ethereum or an Ethereum token to download and once payment is received they will receive download automatically. This system will work similar to iTunes but with cryptocurrency. The site will have a stylish, modern index page where the download will be found and a couple simple sub pages such as pri...

    $316 (Avg Bid)
    $316 Сер. заявка
    14 заявки
    Token modeling 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    For a token model for which I would to have critics and challenges, I am looking for someone with strong passion for blockchains/Token/Smart Contracts etc,, This is a job for someone who have passion than for someone who want to make money immediately.

    $12 / hr (Avg Bid)
    $12 / hr Сер. заявка
    10 заявки

    We are looking for a blockchain developer who will be responsible for designing, implementing, and supporting a distributed blockchain-based network. Primary responsibility will be analyzing requirements, designing blockchain technology around a certain business model, and the building and launching of a blockchain network. You'll be assisting a team (two full stack developers) that has a &q...

    $19 / hr (Avg Bid)
    $19 / hr Сер. заявка
    23 заявки
    Payment forwarder Cryptocurrencies 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    Hi. make an API just for transfer money from an private key of {dogecoin(bitcoin(litecoin} to another address ( main wallet for us ) ? If you can make it under 10 hours massge me no more longer Thanks Telegram : [увійдіть, щоб побачити URL]

    $638 (Avg Bid)
    $638 Сер. заявка
    17 заявки

    Hi guys, i'm looking for a PHP charity script that looking similar to this website [увійдіть, щоб побачити URL], with Cryptocurrency donation features. contact me for me if you have something similar to this script. NOTE: Not looking for who to design similar site for me, i am only looking for the script and willing to pay OK.....Cheers

    $198 (Avg Bid)
    $198 Сер. заявка
    4 заявки

    Hi guys, i'm looking for a cryptocurrency PHP charity script that looking similar to this website [увійдіть, щоб побачити URL], contact me for me if you have something similar to this script. NOTE: Not looking for who to design similar site for me, i am only looking for the script and willing to pay OK.....Cheers

    $1094 (Avg Bid)
    $1094 Сер. заявка
    2 заявки
    Bitcoin wallet functionality for PHP project 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    BitCoin Functionality for PHP app I am looking for a skilled PHP Developer to help add BitCoin functionality to an e-commerce website I am working on. The project is being developed in PHP using the Code Igniter 3 framework so ideal would be to find a person with PHP, Code Igniter and BitCoin knowledge :) All registered members of the website will have their own pre-paid BitCoin account, this ac...

    $193 (Avg Bid)
    $193 Сер. заявка
    19 заявки

    I want a professional here who has developed a app for me that is online now that i can check,that is habing diffrent wallets for keeping 10 cryptocurrencies and custom currency, once i review the app,i would need edits to the design and a type of it handed to me in few days,i domt want work from scratch,and i domt fund before,i see admin and app with my designs first then i apprive anyother thing...

    $125 (Avg Bid)
    $125 Сер. заявка
    9 заявки

    I am looking to make a Multi Vendor market place for a dot com. This is not a simple word press website. I need an actual developer who can handle this. This is a huge project. I am looking to make this as a dot com and also a dot onion mirror. The dot com is more improtant to start. The features will be as followed. Multi Vendor marketplace with rating system and messages. Customer will send t...

    $7530 (Avg Bid)
    $7530 Сер. заявка
    44 заявки

    Hi, I need a simple matrix system. There is an example of the system I want. ([увійдіть, щоб побачити URL]) I just want a little change. * 2*4 matrix system will pass to a higher level that completes the Matrix * total 7 levels *each investor will join the system with 0.010 bitcoin and will not pay any further *payments will only be made by bitcoin *as shown in the picture, there will be no gain ...

    $481 (Avg Bid)
    $481 Сер. заявка
    13 заявки
    Firebase function project 2 дні(-в) left
    ПІДТВЕРДЖЕНО

    MUST have good knowledge into firebase functions, firestore and storage. The developer will optimize the code already existing into firebase cloud functions and give support to future updates. The app is integrated with Coinpayments API. We are looking for someone that want to engage into the project. We want to start small and increase the amount paid to you as you are getting more involved int...

    $11 / hr (Avg Bid)
    $11 / hr Сер. заявка
    18 заявки
    Build me a telegram refferal system.. 2 дні(-в) left
    ПІДТВЕРДЖЕНО

    PM me for details. The system checks if participants is not a fake telegram account, tells them to perform some task and saves their tron address.

    $149 (Avg Bid)
    $149 Сер. заявка
    9 заявки
    Blockchain developer 2 дні(-в) left

    I need a blockchain developer to develop [увійдіть, щоб побачити URL]

    $4543 (Avg Bid)
    $4543 Сер. заявка
    18 заявки
    Fix The Bitcoin Payment System In Market Script 1 день left
    ПІДТВЕРДЖЕНО

    Multi vendor marketplace escrow script that runs using bitcoind. Sellers list items for sale in exchange for bitcoin. Buyers deposit bitcoin to their bitcoin wallet on their market account. They then buy products from sellers on the market using the bitcoin. Buyer clicks buy > Bitcoin transfers to market central escrow wallet hosted on server > Buyer confirms goods have been received and ...

    $290 (Avg Bid)
    $290 Сер. заявка
    10 заявки
    Coinpayments.net similar with ALL features 1 день left
    ПІДТВЕРДЖЕНО

    Hi freelancers, We would like to get similar website to [увійдіть, щоб побачити URL] with ALL the existing features on it. (Buy/Sell/Wallet/PaymentProcessing/Plugins/API/multilanguages/etc...etc...) Nothing is going to be provided by us. You have to do it all. Please list your real best price and timeline. We will not contact you to negociate as we believe the project is already very clear. M...

    $3972 (Avg Bid)
    $3972 Сер. заявка
    10 заявки
    Coingate similar with ALL features -- 2 1 день left
    ПІДТВЕРДЖЕНО

    Hi freelancers, We would like to get similar website to [увійдіть, щоб побачити URL] with ALL the existing features on it. (Buy/Sell/Wallet/PaymentProcessing/Plugins/API/etc...etc...) Nothing is going to be provided by us. You have to do it all. Please list your real best price and timeline. We will not contact you to negociate as we believe the project is already very clear. Moreover, to avo...

    $4254 (Avg Bid)
    $4254 Сер. заявка
    13 заявки
    Bitcoin buy and sell and Trading website 1 день left
    ПІДТВЕРДЖЕНО

    Hi freelancers, One of client want to launch bitcoin selling and buying with trading. Please reply if you already done similar. We are looking experienced freelancer who already worked similar project. We know this is little big project budget will discuss. Cheers DCS

    $175 (Avg Bid)
    $175 Сер. заявка
    4 заявки
    Hard fork of existing altcoin 1 день left
    ПІДТВЕРДЖЕНО

    Want to hard fork existing altcoin. Want to make a few simple changes. Need windows, Mac and Linux wallets. GitHub set up and open source explorer set up.

    $994 (Avg Bid)
    $994 Сер. заявка
    24 заявки
    want to creat a good topic design with graphics for bitcointalk topic 13 годин(-и) left
    ПІДТВЕРДЖЕНО

    we want to create a good topic design with graphics for bitcointalk topic . for promoting our project . tecnical whitepaper : [увійдіть, щоб побачити URL] whitepaper : [увійдіть, щоб побачити URL]

    $173 (Avg Bid)
    $173 Сер. заявка
    8 заявки

    Polymerbit Ltd. is a UK based startup founded in 2017 that is focused on offering solutions to companies and projects within the cryptocurrency industry. Our main products involve 'banknote' style in house designed cold storage wallets that essentially hold cryptocurrency. So far we have had success in targeting companies to develop cryptocurrency banknotes with their logos and brandin...

    $1118 (Avg Bid)
    $1118 Сер. заявка
    11 заявки

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

    $7 - $69
    Прихований
    $7 - $69
    48 заявки