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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    Smart contract 6 дні(-в) left

    I need a ​smart contract for an ICO based on ERC20 token

    $362 (Avg Bid)
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    4 заявки

    I want an android app which will show current crypto currency price in notification bar similar to this app Bitcoin checker link here [увійдіть, щоб побачити URL];hl=en_IN for three exchanges bittrex binance and bitfinex

    $111 (Avg Bid)
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    10 заявки
    USDT Omni HD Wallet 6 дні(-в) left
    ПІДТВЕРДЖЕНО

    1. Generate many usdt address for deposits in a simple web application 2. All usdt are consolidated in one main address for transfer to other usdt address 3. Verify deposits completion for the many usdt addresses

    $1010 (Avg Bid)
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    Blockchain Project 6 дні(-в) left

    We have a good project with real product. now we are looking for a good person who are famous in Blockchain and Crypto world to be a member of team, we need their good profile in Twitter or Linkedin. Please contact if you are the person who can be like this. Thanks!

    $3954 (Avg Bid)
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    22 заявки

    Want a very simple exchange via smart contract and extremely simple interface. The project is one token to be exchanged with ethereum. Price of token is always 0.01eth the price can’t be changed but people will list tokens to sell or buy on order book and you can take those orders. The price is the same but people can list % over or under the price only within 5% of the price of 0.01eth (ove...

    $85 (Avg Bid)
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    3 заявки
    Cryptocurrency Trading Algorithm for Market Making 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    Dear Freelancer, We are looking for an trading algorithm which via API can be connected to cryptocurrency exchanges. The software will be used for MarketMaking services. Please only experienced freelancers with a track record.

    $36 / hr (Avg Bid)
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    Hi, I am Sumanth, I am doing Masters at a UK based University, I need a blockchain developer for my Idea of my thesis, I have all the background knowledge of my project but I am lacking at the programming skills as I am not from the programming background. My project is about energy transactions with blockchain

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    Add 3 features to core php wesite 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    1) In existing assigning plans page, let Admin can assign plan without time limitation . 2) Increase the newsletters number can Admin send by configuring stmp. 3) Display specific concerned pages parts ( instead of top page ) when user redirects. 4) Create (connect with us) link pages to facebook, tweeter and google

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    64 заявки

    I am looking for a professional Whitepaper for my project. 10Pages+ with good market research, included some economics with references and Charts. Road Map etc. I will give you around 30% of the info I already have with an overview of the product. Knowledge of Token sales important and how to include it in the Whitepaper. High-level Knowledge of following is needed: - Blockchain - Ethereum - S...

    $193 (Avg Bid)
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    26 заявки
    Need a ICO platform/website -- 2 5 дні(-в) left
    ПІДТВЕРДЖЕНО

    Hey! I have a ERC20 token and need a ICO platform for it. In your bid please provide examples of how it could look from your previous jobs with ICO platforms/websites. I will only hire you if you have experience with ICO platforms. Show me examples of your previous work for this kind of project when you bid. The platform/website should include an admin panel and features like buying my token.

    $570 (Avg Bid)
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    7 заявки
    Blockchain Expert (GoLang) 5 дні(-в) left

    I have a a blockchain derived from GoChain. It adds enhanced transaction features. Basically it adds a small structure on to every transaction. Need assistance on finalizing & testing of new feature as well for someone to write me a bash script or small golang tool for configuring a new blockchain including the Genesis block. it has to ask for each of the configuration parameters with descr...

    $480 (Avg Bid)
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    13 заявки
    mature crypto exchange source code needed 4 дні(-в) left
    ПІДТВЕРДЖЕНО

    mature crypto exchange source code [увійдіть, щоб побачити URL] have demos

    $1194 (Avg Bid)
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    8 заявки
    Build a site in framework like changer.com. 4 дні(-в) left
    ПІДТВЕРДЖЕНО

    Build an e-currency exchange site like [увійдіть, щоб побачити URL] in php framework. It should be 100% secure.

    $586 (Avg Bid)
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    17 заявки

    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

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    4 заявки
    Content Writers 3 дні(-в) left

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

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    15 заявки
    I´m running bitexchange script. Need help with adding new coins 3 дні(-в) left
    ПІДТВЕРДЖЕНО

    Hi all, As subject states. I´m running bitexchange script (cryptocurrency exchange) . Need help with adding new coins . (website link [увійдіть, щоб побачити 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 (1-2x) ...

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    5 заявки
    Cryptocurrency Exchange Script Modify :) 2 дні(-в) left
    ПІДТВЕРДЖЕНО

    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)

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    Linux based device modification using Putty 2 дні(-в) left
    ПІДТВЕРДЖЕНО

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

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    Blockchain project. 2 дні(-в) left

    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...

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    6 заявки
    Design a trading site. 2 дні(-в) left
    ПІДТВЕРДЖЕНО

    I need a new website. I need you to design and build it, that’s works like [увійдіть, щоб побачити URL] with additional coins.

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    37 заявки
    Block chain 2 дні(-в) left

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

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    21 заявки
    Test the project 2 дні(-в) left
    ПІДТВЕРДЖЕНО

    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 ?

    $146 (Avg Bid)
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    9 заявки

    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)
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    Candidate should be talented in encryption on IPFS.

    $29 / hr (Avg Bid)
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    24 заявки

    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...

    $10651 (Avg Bid)
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    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...

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    14 заявки
    Provably Fair Developer Needed -- 3 1 день left
    ПІДТВЕРДЖЕНО

    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 ...

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    Crypto investment; exchange and trading platforms. 1 день left
    ПІДТВЕРДЖЕНО

    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)
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    Yodlee API integration using Node.js and React Native 1 день left
    ПІДТВЕРДЖЕНО

    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)
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    Blockchain Software Development 23 годин(-и) left

    - 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...

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    Cryptocurrency Exchange Like - Binance, OKEX, Bittrex 22 годин(-и) left
    ПІДТВЕРДЖЕНО

    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. ...

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    MacBlock project 22 годин(-и) 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...

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    Privacy based protocol for Blockchain development 21 годин(-и) left
    ПІДТВЕРДЖЕНО

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

    $458 (Avg Bid)
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    7 заявки

    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...

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    2 заявки

    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)

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    Create A Bitcoin Payment System 16 годин(-и) left
    ПІДТВЕРДЖЕНО

    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.

    $1618 (Avg Bid)
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    34 заявки

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

    $32 / hr (Avg Bid)
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    22 заявки

    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)
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    15 заявки
    Develop a Browser Extension -- 3 8 годин(-и) left
    ПІДТВЕРДЖЕНО

    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: [увійдіть, щоб по...

    $295 (Avg Bid)
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    18 заявки

    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)
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    1 заявки

    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

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    35 заявки
    Dapp application expert 3 годин(-и) left

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

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    21 заявки

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

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    18 заявки

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