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Blockchain is a distributed register that is used to maintain a continuously growing list of records, called blocks. It has revolutionary applications in finance (such as cryptocurrencies like Bitcoin) and decentralized applications like online voting. Contratar a Blockchain Developers

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    44 trabajados encontrados, precios en EUR
    Escrow for cryptocurrency 6 days left
    VERIFICADO

    Hi. I am looking for someone who can create a similar site like escrow.com in function but users will pay with some cryptocurrency like bitcoin, litecoin, .. Please contact me if you think you can do it the best.

    €493 (Avg Bid)
    €493 Oferta Promedio
    13 ofertas

    I have an innovative project involving an industry which has not been touched by smart contracts so far and is only starting to gain ground in terms of Blockchain. Early Mover advantage and solves a major problem faced nowadays. Solution, concept and idea was conceived a couple of weeks ago. Selected for a Validator Programme with a local government organisation which helps start ups in the blockc...

    €2786 (Avg Bid)
    €2786 Oferta Promedio
    14 ofertas
    €334 Oferta Promedio
    8 ofertas

    So basically, we are expecting 1500-2000USD for whole project deliever. Web is needed. 1) if you have done similar work and have template, it will be good 2) If you know online source to buy, it's also good 3) If you have smart contract experience in both EOS and ETC it's good 4) we consider, working timezone, if you can work on UTC-5, it's bonus 5) Timeline is 1-1.5 months, whole p...

    €1791 (Avg Bid)
    €1791 Oferta Promedio
    11 ofertas

    Existing Cryptocurrency needs a wallet update fork with all existing transactions. Must have experience in blockchain development and forking existing cryptocurrencies.

    €2338 (Avg Bid)
    €2338 Oferta Promedio
    30 ofertas

    2000 words • Solidity • [login to view URL] • Metamask I may change the main topic of the game so the proposal should focus on the other topics like technical aims objectives background

    €72 (Avg Bid)
    €72 Oferta Promedio
    11 ofertas
    Build A CryptoCurrency Exchange 6 days left
    VERIFICADO

    we want to build a cryptocurrency exchange not token exchange not ICO website crypto exchange BTC BCH ETH LTC XRP NEO USDT also, we want to add two fiats for trading all coins should be able to trade with each other as a pair and for fiat as well *** you can download requirements document and read that in depth and word by word *** if you want to have a chance to choose as this project freelanc...

    €5093 - €6791
    Destacado Sellado
    €5093 - €6791
    71 ofertas

    I have long term project and I need software company who can work on blockchain development with us. You should be available for 8 hours at least in a day

    €25 / hr (Avg Bid)
    €25 / hr Oferta Promedio
    18 ofertas
    Block chain tor website 5 days left
    VERIFICADO

    Hey, i need to make a tor website Configuring Onion Services for Tor. If you know about tor and blockchain please only send me the proposal. [login to view URL]

    €637 (Avg Bid)
    €637 Oferta Promedio
    19 ofertas
    Find a blockchain expert 5 days left
    VERIFICADO

    I am looking for good developer who has enough experiences in blockchian. It`s a long-term work. Thank you.

    €12 / hr (Avg Bid)
    €12 / hr Oferta Promedio
    21 ofertas

    I need a support for the marketing campaign I'm having for an ICO. In particular I expect - Managing all the social channels (Linkedin, Facebook, Steemit, Medium, Reddit, Bitcointalk, etc) - Producing original content for posts, tweet, etc. (with the support of team members) - Controlling ICO ranking over a bunch of websites (e.g. ICObench) - Manage a google adv campaign The effort should b...

    €428 (Avg Bid)
    €428 Oferta Promedio
    26 ofertas

    We are looking for a hyperledger expert to build a Proof Of Concept blockchain with various: - Various Chaincodes that supports various transactions - Various Chaincodes executors with different roles & Permissions - Integration with existing Participants Systems We are an established Company in Canada and looking forward for partnering with good members, if you think this could be a good f...

    €862 (Avg Bid)
    €862 Oferta Promedio
    10 ofertas
    Simple Ethereum Token Swap 4 days left
    VERIFICADO

    I want a simple contract where users send the old version of our token and instantly receive the new version of our contract. For each 1 token of the old version they send they will receive 3 of the new token. this should be automated and gas is paid by the user when they send the old contract so I shouldnt have to add eth for gas for this function. I need this asap.

    €180 (Avg Bid)
    €180 Oferta Promedio
    14 ofertas

    Design and architecture for solution based on Blockchain Ethereum technology is required

    €176 (Avg Bid)
    €176 Oferta Promedio
    5 ofertas

    I want to build a app which works as Data Tracker. For your convenience I draw some pictures please look at those it will help to sum up what I try to convey. But, I want this app only bulid on Blockchain (BigchainDB). Main Functionality of App :- To detect permission access of other apps

    €1381 (Avg Bid)
    €1381 Oferta Promedio
    8 ofertas
    ICO whitepaper 4 days left
    VERIFICADO

    i need someone that can create a good quality ico whitepaper that explains what the overall business is about. show your portfolio.

    €164 (Avg Bid)
    €164 Oferta Promedio
    27 ofertas

    I need a software developer to modify the Bitcoin code (hosted on Github) as per the spec which will be provided. I need this done within 7 days of the project being awarded.

    €1413 (Avg Bid)
    €1413 Oferta Promedio
    16 ofertas

    need a buy sell trading engine that also works with external exchanges.

    €677 (Avg Bid)
    €677 Oferta Promedio
    15 ofertas
    Crypto-currency expert 3 days left
    VERIFICADO

    I need crypto-currency expert who can work for me in long-term. No agency, only developer bid. Please apply with experiences. Thank you.

    €5 / hr (Avg Bid)
    €5 / hr Oferta Promedio
    10 ofertas
    Crypto Payment Gateway 3 days left
    VERIFICADO

    Hello. I am looking for someone who could develop a payment gateway for accepting crypto (similar to coinpayments). For example, I am a store owner and I want to accept payment in bitcoin and other altcoins. I will install a plugin (which is the payment gateway) on my store. When the buyer clicks on the checkout, he will have an option to choose the coin he wants to pay in. Let's just say tha...

    €449 (Avg Bid)
    €449 Oferta Promedio
    14 ofertas
    Decentralized app 2 days left
    VERIFICADO

    Texasholdem poker tournament decentralized app

    €2405 (Avg Bid)
    €2405 Oferta Promedio
    13 ofertas

    We are looking for a DApp programmer to build a demo project. We are in Proof of Concept stage and looking for experience programmer for quick job to prove our ideas works. Following with Scope 1. DApp required to query data from our API. We have a sales transaction want to submit on Ether Blockchain. Following with sample data structure and may have minor changes. Customer Name, Transaction Typ...

    €229 (Avg Bid)
    €229 Oferta Promedio
    18 ofertas
    Erc20 Token 2 days left
    VERIFICADO

    We are looking for developer to code us on ERC20 token and develop its user wallet

    €706 (Avg Bid)
    €706 Oferta Promedio
    22 ofertas

    Hi This is altcoin creation task. No difficult algorithm. Just only fork the bitcoin and create altcoin for specific requirement. Please have a look attached file.

    €884 (Avg Bid)
    €884 Oferta Promedio
    7 ofertas

    [login to view URL] is where this alert will be focused on only one asset. You have bid and ask prices I want an alert when these prices hit 0.00000009 and 0.00000011. I can have email alerts and or pop up or whatever as long as it is in real time

    €100 (Avg Bid)
    €100 Oferta Promedio
    3 ofertas

    Hi, We need to create a professional white paper for a technology Blockchain startup. The company wants to take the Sharing (On-demand, Gig) Economy to the next level with the power of Blockchain technology. Content needed on the document: Overview of the Industry Problem to be solved Proposed solution Product description Technology explanation Areas of expertise needed: Mathematics ...

    €629 (Avg Bid)
    €629 Oferta Promedio
    27 ofertas

    Hi This is altcoin creation task. No difficult algorithm. Just only fork the bitcoin and create altcoin for specific requirement. Please have a look attached file.

    €1125 (Avg Bid)
    €1125 Oferta Promedio
    11 ofertas

    Hi, we're looking for blockchain experts who can make us decentralized exchange like such like idex or ddex. (or customize previously made solution of yours for us) We would like the exchange's smart contract is based on forkdelta's. The exchange must provide all basic functions like: (simply all functions that fork-delta provide + tradingview) - withdraw / deposit - listing and d...

    €9314 (Avg Bid)
    €9314 Oferta Promedio
    40 ofertas

    I need Developers that have experience with Blockchain technology Skillset needed Bitcoin Core, masternodes, C/C++, Api Development, ERC 20,

    €16 / hr (Avg Bid)
    €16 / hr Oferta Promedio
    21 ofertas

    I have been associated with the BFSI industry for 13 yrs initially from business and operations side and then technology and eventually landed up into marketing and strategy. Having realized that this diversified experience is a good platform to enter the next big wave of innovation in the Fintech space, I have started to develop a few disruptive banking products using Blockchain, Robotics and Dat...

    €35 / hr (Avg Bid)
    €35 / hr Oferta Promedio
    3 ofertas

    I have been associated with the BFSI industry for 13 yrs initially from business and operations side and then technology and eventually landed up into marketing and strategy. Having realized that this diversified experience is a good platform to enter the next big wave of innovation in the Fintech space, I have started to develop a few disruptive banking products using Blockchain, Robotics and Dat...

    €11 / hr (Avg Bid)
    €11 / hr Oferta Promedio
    3 ofertas

    help me creating erc 20 smart contract

    €123 (Avg Bid)
    €123 Oferta Promedio
    12 ofertas

    I need a blockchain engineer who has good ideas towards application of blockchain to a social relevant issue

    €126 (Avg Bid)
    €126 Oferta Promedio
    4 ofertas

    I am going to launch token issuing platform similar with waves. Hope to discuss about possible way to get approach early. If you have built this, you are the top candidate and start project soon. I hope all things done in few weeks. Must be experienced with Waves.

    €2316 (Avg Bid)
    €2316 Oferta Promedio
    22 ofertas

    I have a start up for e-commerce. I am looking for crowd funding. So, eventually need a business plan for this

    €7 / hr (Avg Bid)
    €7 / hr Oferta Promedio
    20 ofertas

    Please read full documentation + screenshots [login to view URL] ------------------------------- Overview Current project based on Original project: [login to view URL] ------------------------------- 1. We need to Change the current logic how wallets opened 2. Token logo fix

    €950 (Avg Bid)
    €950 Oferta Promedio
    6 ofertas
    Looking for a Blockchain expert 1 day left
    VERIFICADO

    I am looking for blockchain expert or team who has expertise in real asset based cryptocurrency. Requirements>> 1. Strong knowledge of tokenizing 2. Good understanding of real estate ecosystem

    €34 / hr (Avg Bid)
    €34 / hr Oferta Promedio
    43 ofertas
    Develop Crypto Trading Software 15 hours left
    VERIFICADO

    I need someone who can develop crypto trading software. platform I'm focusing - Binance, Bittrex

    €393 (Avg Bid)
    €393 Oferta Promedio
    25 ofertas

    i want to make auto payment system with bitcoin for my website [login to view URL] im have payment system paypal and 2checkout and i want to add payment with bitcoin i need to implement the new payment method with api of bitcoin

    €414 (Avg Bid)
    €414 Oferta Promedio
    22 ofertas

    I need to make a new coin using open source of current one, before you bid note you should have experience in fork POS coins before and make everything work probable, contact me for all coin specifications. Please bid within my budget...

    €475 (Avg Bid)
    €475 Oferta Promedio
    15 ofertas

    I have this app published and in use. [login to view URL] I want to add Notifications to the app. I want to be able to write a message in a web panel and have it sent to all users of the app as a notification. We already have an admin web panel so this would just be something to add on. You will not need to create an admin panel from scratch. An additional feature to select specific users for a n...

    €526 (Avg Bid)
    €526 Oferta Promedio
    20 ofertas

    Hello, We are implementing Hyperledger into our environment and are looking for someone to consult via phone/ remote access, who understands blockchains/ can answer questions we have. The person we're looking for needs to be able to deploy hyperledgers into production (using Hyperledger Fabric ideally, but any platform will work). Of particular interest is the use of consensus across multip...

    €33 / hr (Avg Bid)
    €33 / hr Oferta Promedio
    36 ofertas

    Need an A to Z, Blockchain, Bitcoin, Smart contract, ICO, White papers expert, who have completed a project successfully and can share white papers + project, please share your project link in the bid. Many thanks

    €2814 (Avg Bid)
    €2814 Oferta Promedio
    54 ofertas
    Create a new Crypto Currency 3 days left
    VERIFICADO

    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.

    €2993 - €4988
    Destacado Sellado Acuerdo de Confidencialidad
    €2993 - €4988
    47 ofertas