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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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Projekt/Natečaj Opis Ponudbe/Vnosov Znanja Pričeto Se konča Cena (EUR)
Create CryptoCurrency - Algo Neoscript or Skein Hi, We looking for an dev expert on crypto currency / blockchain domain, for create our own crypto currency coin. Our requirement is : Create an coin Hybrid PoW/PoS cryptocurrency based on Skein algorithm or Neoscrypt and feature hybrid PoW/PoS stage. Algo : NEOSCRYPT OR SKEIN Proof of Work / Proof of Stake / Masternodes Total supply: 69.000.000 More details will send to you per... 24 node.js, Bitcoin, Blockchain, Ethereum Feb 22, 2018 Danes6dni 22ur €4294
BLOCKCHAIN DEVELOPER NEEDED! BTC + ERC20 Web Wallets Hello I have an existing investing platform where people can use my erc20 token as utility token. I am searching for a Blockchain developer to realise the following: 1. one BTC web wallet for each user (deposit + withdrawal) 2. one ERC20 web wallet for each user (deposit + withdrawal) every user has to have his own wallet where he can deposit and withdrawal hes funds. The design and ... 10 Bitcoin, Blockchain Feb 22, 2018 Danes6dni 21ur €326
Blockhain Parser Cryptocurrency Bitcoin BTC C# The application should be multi-threaded at least the initial Sync. The application must parse the **entire** bitcoin blockchain / chainstate db folder. The application needs to extract all BTC Addresses with Balance > 0 in the fastest possible way. These addresses has to fill a List1 ( BlockchainAdresses ) Could be stored in a database to update it later. A second List (MyBTCAdresses) nee... 15 C programiranje, Big Data, Bitcoin, Programming, Blockchain Feb 22, 2018 Danes6dni 19ur €854
Build Bitcoin online Wallet Build Bitcoin online Wallet In php .. 30 PHP, Kriptografija, Bitcoin Feb 21, 2018 Danes6dni 17ur €4550
bitcoin address alert tracking Hi, I want to receive instant alerts via email and telegram when specific bitcoin address receive or send amounts valued 10 million USD or greater on blockchain.info. 19 PHP, Javascript, Arhitektura porgramske opreme, MySQL, Bitcoin Feb 21, 2018 Danes6dni 16ur €316
Cryptocurrency exchange platform I'm looking for talented designer and developer who has experienced in Cryptocurrency exchange platform. Here are referenced links : [url removed, login to view] robinhood has got very good Interface : [url removed, login to view] What's your best estimate? 23 PHP, Oblikovanje spletnih strani, Grafično oblikovanje, Arhitektura porgramske opreme, Bitcoin Feb 21, 2018 Danes6dni 16ur €1185
Create a Smart Contract on Ethereum for Token Distribution Greetings Freelancers! We are in search of an experienced freelancer that can create an ERC20 token contract on Ethereum. The contract will need to distribute our token to a list of Pre-determined Addresses including an Airdrop campaign, and include delayed future distribution requirements. We also need the contract to be properly included and verified on Ethereums explorer. Requirements: ... 2 PHP, C++ programiranje, Bitcoin, Programming, Ethereum Feb 21, 2018 Danes6dni 9ur €9620
Looking for mining experts Looking for someone with working knowledge of mining software and configuration of rigs. 3 Kriptografija, Bitcoin Feb 21, 2018 Danes6dni 6ur €126
Cryptocurrency mining software Similar to Minergate dot com mining software 9 Java, Namizje Windows, Arhitektura porgramske opreme, Bitcoin, Ethereum Feb 21, 2018 Danes6dni 6ur €931
Referral programme need hi, we have website php based [url removed, login to view] we need rereferal programme. this site is for BitCoin ICO and I need 100% compatible referral programme. pls show us your demo and features so we will award you. thanks 10 PHP, Oblikovanje spletnih strani, Grafično oblikovanje, HTML, Bitcoin Feb 21, 2018 Danes6dni 5ur €133
Website Building I need a similar website. [url removed, login to view] I need with the live transaction chart. Download and run the site on offline. Bid if you can do it. 19 PHP, Javascript, Oblikovanje spletnih strani, HTML, Bitcoin Feb 21, 2018 Danes6dni 5ur €129
Developing a coin with DAG algorytm chain Developing a full coin with DAG Algorytm , 1000.000.000 premined coins with 1 percent transactions fees. The coin include Creation, Block Explorer creation , Seednode , Wallet compilation and Coin revival services. Please fixe price only you can suggest any price you would I can't talk with for price . 7 Algorithm, Statistika, Matematika, Bitcoin Feb 21, 2018 Danes6dni 5ur €416
Looking to pay a cryptocurrency- blockchain developing expert to create a utility token Hi, I just got back from the National Bitcoin conference in Miami and finally think I am ready to pursue my own token. I have been in the cryptocurrency space since 2012. Although, have only been approaching it seriously this past year. I am very approachable, easy and fun to work with. I am needing a developer who fully understands blockchain principles, who I can run my ideas against and hop... 38 PHP, Oblikovanje spletnih strani, Arhitektura porgramske opreme, HTML, Bitcoin Feb 21, 2018 Danes6dni 4ur €80
Intigrate diffrent Windows Form in our Windows Form (Cryptocurrencies,NiceHash,c#) Hey, we are looking for someone to intigrate nicehash legacy source code in our Windows Form (Nicehash Legacy itself is a windows form, but a bit old). We have attached a simplified version([url removed, login to view]) of our windows form and the link to nicehash legacy source code. (Below) We suggest you go true the mining process first to understand how it works. You can download it at li... 12 C# programiranje, Arhitektura porgramske opreme, Bitcoin Feb 21, 2018 Danes6dni 4ur €546
add altcoins to cryptocurrency exchange platform we need team member for : User generates a new address for coin (IndexController->getDepositForm) User send an amount to this address (BitcoinPending command executes and adds pending transaction to database) Transactions gets confirmed and amount adds to user balance (BitcoinNewBlock executes and checks blocks for the transactions, once the transaction mined into a block the following ... 13 Bitcoin, Ethereum Feb 21, 2018 Danes6dni 1ur €1019
Ethereum Wallet I want simple ethereum web wallet and also send and receive function it should be simple web based app where new user signs up and he will have unique eth address for his account and with that eth add if he has balance can send eth or can receive eth to that address 18 Kriptografija, C++ programiranje, node.js, Bitcoin, Ethereum Feb 21, 2018 Danes6dni 1ur €755
Build Cryptocurrency exchange platform. I need blockchain expert. I need site similar https://token.store. You must have enough experience in erc20 token, smart contract and web3js. Please let me know if you can do. 9 PHP, HTML5, Bitcoin, Blockchain, Ethereum Feb 21, 2018 Danes6dni €6120
Smart Contract for ICO by Ethereum ERC20 Token We are looking for a freelancer to create a smart contract on Ethereum for our fundraising ICO. To boost our project we like to use this ICO as fundraising. We would also like help Integrating this into our website to show a visual of how much has been raised. We would like to setup the smart contract so that the coin supply is created based on the amount deposited and that any surplus coi... 31 PHP, Oblikovanje spletnih strani, Bitcoin, Programming Feb 21, 2018 Danes6dni €1229
Integrate Ripple wallet to cryptocurrency exchange market Hello I need ripple expert. My goal is to integrate ripple wallet to cyptocurrency exchange market. If you have experience with xrp, please bid Regards, Huapeng 14 PHP, Linux, Bitcoin, Web Development Feb 21, 2018 Danes6dni €193
Make Crytocurrency / coin with adjustable masternode rewards What I mean by this is that you should apply the coding or logic by which I will be able to change masternode rewards of the coin per block. OR you can make some code / logic to give ALL masternodes 50 coins per block. If there are 50 masternodes then every masternode gets 50 coins per block. If there are 100 masternodes, then also every masternode gets 50 coins per block Project Type: One-t... 12 Bitcoin, Blockchain, Ethereum Feb 21, 2018 Feb 21, 20185dni 21ur €2325
Sell Blockchain messenger need to sell my project or create/join to/ a team which have similar goals. i have a first full Blockchain Messenger. have core. mobile app for android. web. it is contains two parts: 1-st - only wallet for alt-coin, 2-nd - messenger according core and blockchain. 12 Spletni marketing, Marketing, Bitcoin, Blockchain Feb 21, 2018 Feb 21, 20185dni 19ur €3296
Bitcoin Core I have a large CSV file with strings, each one is a Bitcoin address. For each of these addresses, I need to know its final balance. Using an external API would be problematic, since its calls are limited, and my file has millions of strings. Therefore, it would be best to download the blockchain and query it locally. You can assume that Bitcoin Core is already installed. Eventually, I need to kno... 15 PHP, C programiranje, Arhitektura porgramske opreme, MySQL, Bitcoin Feb 21, 2018 Feb 21, 20185dni 19ur €131
small btc wallet PLEASE, ONLY BID IF YOU *PERSONALLY* ARE: 1) The actual coder of my project (see description below); 2) Ready to work, on a per hour basis with me (I am a beginner programmer) - in real-time (via Teamviewer and Skype); 3) *Very knowledgeable* about how bitcoin wallets work (since I am); 4) *Proficient* with bitcoin *public* libraries (bitcoin core, bitcoinj...); 5) Ready to *first* ... 5 Bitcoin Feb 20, 2018 Feb 20, 20185dni 17ur €10
Creating an altcoin. - open to bidding I would like a cryptocurrency alt-coin built. I would like it to be pre-mined. I would like it to be connected to my website with a place to get free coins which will be given out in my ico. I would like a wallet on the website., I would also like something setup to allow mining for the coin. A bitcoin clone or Ethereum clone would work well. 19 Sistemski administrator, Linux, MySQL, VPS, Bitcoin Feb 20, 2018 Feb 20, 20185dni 15ur €1588
Crypto currancey Etherium AlT coins Java Browser Online Miner [url removed, login to view] as reference : Our Cloud mining system will allow anyone to set up a miner with ease from our platform/website app You must understand Blockchain / Java / Mining set up requirements . Agreement Based on Milestones and Proof of skill Task One: Set up server cloud miner code to mine Etherium from our server using CPU/GPU resources Task Two: Create online bro... 11 PHP, Java, Javascript, Bitcoin, Blockchain Feb 20, 2018 Feb 20, 20185dni 12ur €16
Design & Develop an ICO website using Wordpress Hi, Looking for capable designer & development team to design & develop an ICO website using wordpress. Our favored ICO websites are [url removed, login to view] [url removed, login to view] [url removed, login to view] Please list your previous website design & development that has login/register function. Your design sample needs to be line with the favored websites we lis... 36 WordPress, HTML, Bitcoin, Blockchain, Ethereum Feb 20, 2018 Feb 20, 20185dni 6ur €42
backend bot for crypto website I need a backend bot built for my website, user login, balance, btc withdrawal,escrow. Bot must create accounts on a different website with info users submit on my website Bot must do email verification Bot must calculate crypto market price Bot must release escrow Bot must exchange crypto currency from exchange API when needed.. BTC -> XMR SYS<-BTC etc... Please send me a quest... 20 PHP, Python, MySQL, HTML, Bitcoin Feb 20, 2018 Feb 20, 20185dni 2ur €655
Cryptocurrency Exchange Website (Designing pages are ready) ERC20 Token and minable coins like BTC, LTC and others Reference: [url removed, login to view] Also be able to add and remove erc20 token. Implementation like IP stuff, when a user long in with different IP, google 2fa etc Please only bid if you can start and finish within 1 week or sooner. Payment i will create 30% after see some progress and rest after completion. Thank you! 30 PHP, Javascript, Oblikovanje spletnih strani, Arhitektura porgramske opreme, Bitcoin Feb 20, 2018 Feb 20, 20185dni 1ur €1130
Write a fundraising campaign I'm looking for someone who is expert in writing a fundraising campaign actually I want to raise money to start my new project, My project is for "Bitcoin trading" not like local bitcoin in this project my plan is to trade using customers bitcoin like share market and will credit profit to customers account if customers want to withdraw his full bitcoin wany time then he can withdra... 8 Marketing, Tržne raziskave, Bitcoin, Kreativno pisanje, Pisanje poslovnih vsebin Feb 20, 2018 Feb 20, 20185dni €456
Animation for Crypto project Onyx is an erc20 token. Onyx is built for service... 1. To facilitate payment of goods and services on Kwakoo Marketplace. 2) To be the base trading currency on Kwakoo Exchange 3) To be spent on POS and withdraw from ATM through a prepaid card. 2 3D animacija, Adobe Flash, Animacija, Bitcoin, Grafično oblikovanje Feb 20, 2018 Feb 20, 20185dni €163
complete bitcoin exchange with top 10 currencies Details specs will be provided in separate communication I need completed bitcoin trading exchange with top 10 currencies. It needs to have complete user registeration, id verification, exchange walltet, send receive coins and most important unbreakable security. 54 HTML, node.js, Bitcoin, Angular.js, Web Development Feb 20, 2018 Feb 20, 20184dni 22ur €3500
Smart Contract Expert Need a smart contract expert to rewrite a smart contract. I want to implement a lock of tokens in the smart contract. Which means the people who bought tokens will see the tokens in their mew but wont be able to move it till a certain date. This date should be changeable by the owner. Some examples are remme, car vertical. 5 Bitcoin, Blockchain, Ethereum Feb 20, 2018 Feb 20, 20184dni 19ur €459
Neoscrypt Coin with Masternodes I I require a crypto currency coded with masternodes using Neoscrypt algorithm. Coin will be based off a pre-existing coin so just need to change the wallet design, and other simple values(name,supply,premine, reward per block). Then recompile wallet for linux/windows. Only bid if you know how to do this (meaning not your first time trying) 4 Bitcoin, Ethereum Feb 20, 2018 Feb 20, 20184dni 18ur €318
Cold Storage Wallets (BTC, ETH, NEO, NEM, LTC, XMR, DASH) - No Asian! Looking for someone with experience in Cold Storage Wallets, creating private keys offline. We would prefer someone with experience handling all wallets mentioned in the title but open to people with experience with just some. We are collecting funds for an ICO, and need secure offline wallets. All other questions or concerns from the applicant can be asked during interview phase. 13 PHP, Inženiring, Arhitektura porgramske opreme, MySQL, Bitcoin Feb 19, 2018 Feb 19, 20184dni 16ur €451
Looking for an experienced individual to create an ICO website. Must have an relevant experience and show previous work Platform will need to as a minimum: * Create Bitcoin and Ethereum Based Wallets using node method * Stagger ICO Sales * Full Back End Admin Further information will be provided to the right candidate, as for turnaround time its going to be 14 days or less. 19 Bitcoin, Laravel, Design, Blockchain, Ethereum Feb 19, 2018 Feb 19, 20184dni 14ur €605
Need a test software to simulate SHA 256 cryptocurrency Hash Rate Hi everyone, We are launching a Cryptocurrency SHA 256 Mining Pool website and system and we need to run some test to get the proper hash rate(per miner received), in other word we just want to test the receiving the hash rate that the mining software is sending, we believe it send only numbers of their speed which is what we need to simulate, It is like a simulator to run test speed to mak... 6 Linux, Arhitektura porgramske opreme, Bitcoin Feb 19, 2018 Feb 19, 20184dni 11ur €361
ASIC Bitcoin Design, Research, Development We have budget to make ASIC. Let me know how to build and production ASIC. we want to know how to make bitcoin ASIC device. we have budget for making ASIC product. we also Want to know EMS company to publish ASIC 9 C programiranje, Bitcoin, Ethereum Feb 19, 2018 Feb 19, 20184dni 5ur €161497
Create a cryptocurrency We are looking to create a new cryptocurrency and need an experienced developer that can develop and update our coin. This should be very straightforward for someone with experience in C hence the size of the project. This project is nothing fancy, just taking the source code and changing the parameters to it. The winner will be given the new parameters after having a few initial discussio... 21 C programiranje, C# programiranje, C++ programiranje, Bitcoin Feb 19, 2018 Feb 19, 20184dni 3ur €919
Set Up Software for mining Ethereum I have a rig with 6 ASUS 580 motherboard and need to have it fully integrated with an Ethereum mining pool. 5 Bitcoin, Omrežna administracija, Spletne storitve, Ethereum Feb 19, 2018 Feb 19, 20184dni 2ur €101
Fork a Ripple wallet depository We are looking for freelancers who can help us fork a ripple wallet depository and improve the end user experience. Tasks to be accomplished: - Fork a Ripple wallet depository - Improve the End User Experience. The ideal partner will be very familiar with Ripple network. Please show me some of your previous made websites. More things will be discussed in the chat. Only offer if... 4 PHP, Oblikovanje spletnih strani, Arhitektura porgramske opreme, Bitcoin, Blockchain Feb 19, 2018 Feb 19, 20184dni 1ur €4527
Write a Whitepaper for Cryptocurrency ICO project Dear Sir, Madam, I am looking for a professional and experienced Whitepaper for a new ICO. The freelancer should have an MBA. 15Pages+ with very good market research, including references to trade and economics supported with Charts. This is for a very specific market. I will give you information about the product, and then the writer should adapt it to the WhitePaper. No Plagiarism ... 61 Pisanje tehničnih vsebin, eCommerce, Bitcoin, Blockchain, Ethereum Feb 19, 2018 Feb 19, 20184dni €748
Wlox Exchange - API Integration I will send you the requirement 24 PHP, Javascript, node.js, Bitcoin, Blockchain Feb 19, 2018 Feb 19, 20183dni 20ur €110
need bitcoin node setup I need your help in setting up bitcoin node. Please bid only if you can do it. Please bid only if you have done it. Please show me working node on teamviewer so that I will know that you have done it. I need node setup in 1 day 14 Bitcoin Feb 18, 2018 Feb 18, 20183dni 7ur €365
developing trade system of cryptocurrency exchange We are developing Cryptocurrency Exchange web platform. We are looking for a person who can develop trade part of this system. Trading system should develop professionally like others professional exchanges with High performance (capable of processing millions orders per second) So we are looking for team member who is: • Expertise on API developing • Expertise on forex • ... 26 Bitcoin, Umetna inteligenca, Blockchain, Ethereum Feb 18, 2018 Feb 18, 20183dni 2ur €7910
Build Cryptocurrency Exchange Platform We are looking for freelancers who can build us a Cryptocurrency exchange like [url removed, login to view] with few other features added. Users will be able to signup and exchange Cryptocurrencies with each other AND on other exchanges, the API of other exchanges will be integrated, meaning that if a user signs up on my website and wants to buy Ripple (and no other users on my site is currently ... 8 PHP, Javascript, Oblikovanje spletnih strani, HTML, Bitcoin Feb 18, 2018 Feb 18, 20183dni 2ur €4241
ICO web site design with kyc and affiliate need great modern looking ICO website in same style as [url removed, login to view] it will have whitelist, kyc, affiliate program, member area, newsletter or auto responder built in. site is one page and member area is one page. affiliate stats shown. 17 Oblikovanje spletnih strani, HTML, Bitcoin, Blockchain, Ethereum Feb 18, 2018 Feb 18, 20182dni 23ur €603
Bitcoin mining expert I want a bitcoin mining expert to develop a automated bitcoin mining program to install on my computer that will use my computer and I get paid maximum bitcoins for doing so. 7 PHP, C programiranje, Python, Arhitektura porgramske opreme, Bitcoin Feb 18, 2018 Feb 18, 20182dni 19ur €24
need correction in signup and some more work hi, our website is [url removed, login to view] I need through teamviewr : 1 : need signup work. (we need new api of coinbase add, accidentally deleted so error come). 2 : verification email logo need to change. 3 : after Login. it show MST Value 47.6 (I want to change it - need to know how). 4 : After Login - it give to buy option - it show two column - one show MST and one show INR - wh... 2 PHP, Javascript, MySQL, HTML, Bitcoin Feb 17, 2018 Feb 17, 20182dni 15ur €19
CRYPTO PLATFORM WE LOOKING FOR EXPERT CODER WITH EXPERIENCE IN CRYPTOS ------------------- PLACE BID ONLY IF U HAVE ALREADY COMPLETE A SIMILAR PROJECT ------------------- Platform need to be able to buy sell bitcoin / eth / Xrp User must be able to register complete first order of max 100 Eur and after complete identification with [url removed, login to view] user have also to complete verification w... 24 PHP, Oblikovanje spletnih strani, Bitcoin, Blockchain Feb 17, 2018 Feb 17, 20182dni 8ur €2448
install altcoins for cryptocurrency exchange We are currently working on Cryptocurrency Exchange platform. We are looking for knowledgeable team member who can add new altcoins to our platform. Responsibilities: • Install altcoins on server • Install token on server • Writing api for coin RPC interface • (IOTA, NEO, DASH, Dogecoin, Ripple, etc ….) • (Status,Eos,Trot,Tehter,etc …) Requi... 17 Bitcoin Feb 17, 2018 Feb 17, 20182dni 3ur €946
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