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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.

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    40 trabajados encontrados, precios en USD

    we want an android app which will show current crypto currency price in notification bar and update automatically

    $122 (Avg Bid)
    $122 Oferta Promedio
    6 ofertas

    mature crypto exchange source code [iniciar sesión para ver URL] have demos

    $1007 (Avg Bid)
    $1007 Oferta Promedio
    7 ofertas

    Build an e-currency exchange site like [iniciar sesión para ver URL] in php framework. It should be 100% secure.

    $607 (Avg Bid)
    $607 Oferta Promedio
    16 ofertas

    hello, i need a Telegram investment bot of single coin, if you have ready-made i will take now, Don't Put Placeholder Price. Thanks

    $97 (Avg Bid)
    $97 Oferta Promedio
    4 ofertas
    Testing of BlockChain Code 5 días left
    VERIFICADO

    I have developed BlockChain based TLS based notary service project. Wanted to hire a BlockChain Expert who can test and evaluate my project and compare the results with other BlockChain technologies

    $298 (Avg Bid)
    $298 Oferta Promedio
    12 ofertas
    Content Writers 5 días left

    Looking for experienced content writers...1st Preference for Pune writers.

    $16 (Avg Bid)
    $16 Oferta Promedio
    15 ofertas

    Hi all, As subject states. I´m running bitexchange script (cryptocurrency exchange) . Need help with adding new coins . (website link [iniciar sesión para ver URL]) So far there are listed BTC, ETH, XRP, XLM, ...I need to add few coins more. Please send me your proposals and your bid. Lowest one with a good experience wins of course. This project will require: Add new coin...

    $160 (Avg Bid)
    $160 Oferta Promedio
    5 ofertas

    Looking for long term blockchain developer who can modify exchange script and crack the code. Change UI Develop Liquidity BO T and Publish on my hosting! I'm willing to pay you 100$ - 200$ and I'll give you my script free of cost. (Value of script 1K)

    $217 (Avg Bid)
    $217 Oferta Promedio
    16 ofertas

    Need to Modify a Linux based device using putty and SSH tunnel . small changes .

    $14 (Avg Bid)
    $14 Oferta Promedio
    11 ofertas

    Hi - I have project that I currently generated some data into my databse automatically . My database is MongoDB and I upload the sample data every second there. I have heard about Blockchain as a secure platform. What I want to do is upload the data into either Ethereum or Hyperledger. I currently upload my data to MongoDB database, not I want to upload data to one of those two Blockchain pla...

    $85 (Avg Bid)
    $85 Oferta Promedio
    4 ofertas
    Design a trading site. 4 días left
    VERIFICADO

    I need a new website. I need you to design and build it, that’s works like [iniciar sesión para ver URL] with additional coins.

    $599 (Avg Bid)
    $599 Oferta Promedio
    37 ofertas
    Block chain 3 días left

    Build a block chain ledger. Build business to business payment system.

    $31520 (Avg Bid)
    $31520 Oferta Promedio
    19 ofertas
    Test the project 3 días left
    VERIFICADO

    Hi I have implemented a nebulas blockchain based TLS notary service to tackle the Man-in-the-Middle attack on local host but i am unable to think on how to evaluate it and its required urgently can you help me out with it ?

    $157 (Avg Bid)
    $157 Oferta Promedio
    5 ofertas

    We are a new blockchain startup that needs a team of professional Web Developers with serious Blockchain development experience. We need people with true experience working with: ✓ Blockchain; ✓ Smart Contracts (Ethereum platform, ERC20 standard); ✓ Bitcoin, EOS, Litecoin (and other famous crypto platforms); ✓ Cryptocurrency Exchanges and Wallets. Preference will be given to a person with experi...

    $41 / hr (Avg Bid)
    $41 / hr Oferta Promedio
    31 ofertas

    Candidate should be talented in encryption on IPFS.

    $29 / hr (Avg Bid)
    $29 / hr Oferta Promedio
    24 ofertas

    We need top of the line developers to build a full-stack decentralized cryptocurrency exchange and spot market. The developers should have the knowledge of blockchains and the decentralization world especially with context to cryptocurrencies such as how transaction occur on blockchains, what are wallets, how trading happens on exchanges and other relevant concepts and should be good in javascript...

    $10837 (Avg Bid)
    $10837 Oferta Promedio
    12 ofertas

    I need a network where different pharmacy databases connect to measure how many products of a particular brand were bought by the same user and thereby give them a discount. The information that we are gonna use are CPF (brazilian ID), bar code, time stamp, number of previous products acquired and pharmacy that sold the product. This information must be in accordance with GDPR and guarantee the an...

    $806 (Avg Bid)
    $806 Oferta Promedio
    11 ofertas

    I need a Provably Fair Developer for a very urgent Provably Fair project. The gambling verification project is for crypto gambling websites and it will be developed as a Chrome Extension. ONLY bid if you have done one or two projects with Provably Fair. Include a link to the Provably Fair project in your bid. PLEASE ANSWER THIS QUESTION IN CHAT: Q :: How can players verify their bet balances ...

    $519 (Avg Bid)
    $519 Oferta Promedio
    15 ofertas

    I need a new website. I need you to design and build it. I need a cryptocurrency investment, Cryptocurrency Exchange(escrow added), trading, Contracts with strong KYC(Identity, selfie and proof of residence verifications). Blockchain, coinpayments integration.

    $1102 (Avg Bid)
    $1102 Oferta Promedio
    37 ofertas

    We are looking for a full stack developer who has experience with the Yodlee API. We are working on a personal finance manager. - The freelancer has to integrate Yodlee API with our system. - Should have good command on Node.js. - Experience in using React Native or React DOM is a plus. - Experience in using Blockchain technology is a plus. We are looking for only individual freelancer.

    $29 / hr (Avg Bid)
    $29 / hr Oferta Promedio
    17 ofertas

    - Deploy Security Token using security token standards (e.g. ERC1404, ST-20 etc.) based on ethereum or a similar platform - KYC forms, accumulating data base (Country, Age, Gender) and sales restrictions such as country and age - Registration of KYC forms to our token holders network/club - Restrictions of Token Holders, Such as newsletters, voting rights on projects and board - Develop of interac...

    $1728 (Avg Bid)
    $1728 Oferta Promedio
    23 ofertas

    Looking for long term developer team for the new project. 1. Liquidity 2. Six crypto Market - BTC,ETH,LTC,USDS, 3 more ERC 3. 20 ERC20 coins and 10 other to be listed 4. New dark and light UI design (binance basic) 5. Admin Panel must have the listing function and adding market pair function. 6. Referral function needs to add and there should be manage function like 30%,50%80% as per admin mind. ...

    $612 (Avg Bid)
    $612 Oferta Promedio
    21 ofertas
    MacBlock project 2 días left

    MacBlock is a blockchain project that’s being developed beside Bitcoin and Ethereum. the project describes it's self as the new era of blockchain as it solved one of the most complicated blockchain problems which is scalability (transaction per second) , so you can consider MacBlock as the fastest blockchain project existing that can run up to 10 Million transaction per second. I'm...

    $30 (Avg Bid)
    $30 Oferta Promedio
    1 ofertas

    Need blockchain developer for existing blockchain who is proficient in privacy based protocol for blockchain. Need a long term commitment from developer as well.

    $464 (Avg Bid)
    $464 Oferta Promedio
    6 ofertas

    The platform works on the currency Bitcoin and Bitcoin cache(should work) The problems are as follows.. 1. Setting up the Commission of the site itself, create a bitcoin wallet and send some percentage of the user's transaction to it. 2. When you create an account, Bitcoin Cash does not generate a wallet address. 3. On the site there is a function of "Advertising", select the produc...

    $84 (Avg Bid)
    $84 Oferta Promedio
    2 ofertas

    Hello, I am installing the EOS wallet and facing scatter wallet and API request issue. Need 1-2 hours of your time to review and shows the mistake done. PAY ONLY MAX $40 USD (no more)

    $85 (Avg Bid)
    $85 Oferta Promedio
    2 ofertas
    Create A Bitcoin Payment System 2 días left
    VERIFICADO

    Create a payment system and exchange that allows a cryptocurrency to be created and sent to user in exchange for a payment on a website. Use the python bitcoinlib or similar to do this. Create a simple gui that allows the user to send money through paypal and receive a cryptocurrency. Let them buy and sell cryptocurrency on exchange.

    $1625 (Avg Bid)
    $1625 Oferta Promedio
    32 ofertas

    For a blockchain project we are looking for a Smart Contract and ERC20 Specialist. Please contact us for more information.

    $32 / hr (Avg Bid)
    $32 / hr Oferta Promedio
    22 ofertas

    I am going to build mobile wallet. What I can provide you : 1. Git repo about core coin. 2. Desktop wallet 3. Vps server that masternode is installed. 4. Workflow with mobile design What you should provide : RESTful APIs for mobile app with configuration server on VPS.

    $765 (Avg Bid)
    $765 Oferta Promedio
    15 ofertas
    Develop a Browser Extension -- 3 2 días left
    VERIFICADO

    I need a browser extension developer for a very urgent provably fair project. The online betting verification project is for crypto gambling websites and it will be developed as a browser extension, preferably chrome. ONLY bid if you have done one or two projects with provably fair or browser extension. You can review the requirements and screens in the below Google Doc link: [iniciar sesi&oac...

    $295 (Avg Bid)
    $295 Oferta Promedio
    18 ofertas

    The platform works on the currency Bitcoin and Bitcoin cache(should work) The problems are as follows.. 1. Setting up the Commission of the site itself, create a bitcoin wallet and send some percentage of the user's transaction to it. 2. When you create an account, Bitcoin Cash does not generate a wallet address. 3. On the site there is a function of "Advertising", select the prod...

    $14 / hr (Avg Bid)
    $14 / hr Oferta Promedio
    1 ofertas

    I am looking to have a Blockchain game/dapp built on TRON. It will be a Trading Card Game similar to Hearthstone and Gods Unchained. I will need the whole game designed, there is no time frame, and the budget is vurrently being worked on

    $4727 (Avg Bid)
    $4727 Oferta Promedio
    31 ofertas

    I am seeking blockchain developer who can help me with building a big project.

    $567 (Avg Bid)
    $567 Oferta Promedio
    20 ofertas

    I need a Blockchain App devloper. Custom token wallet app + unique features. Modern UI/UX Design.

    $370 (Avg Bid)
    $370 Oferta Promedio
    18 ofertas

    About us: Privax is creating a small, yet skilled team of knowledgeable blockchain developers, computer science engineers, and tech enthusiasts that strive to create the most versatile and identity-protected privacy coin in the cryptocurrency market. Our Goal: Our main objective is to fulfill the widespread demand of a privacy crypto with fast transactions, a secure blockchain, identity prote...

    $1299 (Avg Bid)
    $1299 Oferta Promedio
    38 ofertas

    I need 1 simple cryptocurrency API method to be developed. -The API can be built in any programming language -The API should be uploaded to some VPS and it should be made available to use -The source code should also be delivered -This project is urgent. It needs to be done in the next 24 hours. It is simple. It should be too hard. The API method should return the changes in following cryptocur...

    $189 (Avg Bid)
    $189 Oferta Promedio
    15 ofertas

    I need to set up a mobile wallet, a desktop wallet is now working well and I can offer source code. Mobile Front-end is ready. This is only for Blockchain experts for long-term work. Thanks.

    $497 (Avg Bid)
    $497 Oferta Promedio
    13 ofertas

    I need a browser extension developer for a very urgent provably fair project. The online betting verification project is for crypto gambling websites and it will be developed as a browser extension, preferably chrome. ONLY bid if you have done one or two projects with provably fair or browser extension. You can review the requirements and screens in the below Google Doc link: [iniciar sesi&oac...

    $272 (Avg Bid)
    $272 Oferta Promedio
    11 ofertas

    I need a Provably Fair Developer for a very urgent Provably Fair project. The gambling verification project is for crypto gambling websites and it will be developed as a Chrome Extension. ONLY bid if you have done one or two projects with Provably Fair. Include a link to the Provably Fair project in your bid. PLEASE ANSWER THIS QUESTION IN CHAT: Q :: How can players verify their bet balances ...

    $275 (Avg Bid)
    $275 Oferta Promedio
    9 ofertas

    The platform works on the currency Bitcoin and Bitcoin cache(should work) The problems are as follows.. 1. Setting up the Commission of the site itself, create a bitcoin wallet and send some percentage of the user's transaction to it. 2. When you create an account, Bitcoin Cash does not generate a wallet address. 3. On the site there is a function of "Advertising", select the produc...

    $8 - $21
    $8 - $21
    0 ofertas