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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    Bitcoin core developer wanted for supporting my blockchain 6 дні(-в) left
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    Do you have more than a year of bitcoin core development experience? Are you experienced with c++ and qt, and compiling chains for multiple platforms? Then this is the job for you. I have multiple projects for you to support me for long time. Please contact me. i want to start asap with the right person. Thanks and tell me what your favorite programming language is.

    $212 (Avg Bid)
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    A gaming App based on ethereum (if other blockchain prefered please tell me why) 2D gaming app based on ethereum with in App purchases, a level-system and it needs a wallet integration Please have experience in smart contracts, ios and android development. Deadline: End of Q1 2020.

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    Looking for a highly experienced react developer with ethereum and smart contract experience. We recently deployed the new smart contract to the ethereum mainnet and need someone who can connect it with our frontend. The things you need to do: - Call smart contract functions to set and get data. - Add Event listener to listen events of the contract. You will work with our blockchain developer.

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    Bitcoin ATM (3) 6 дні(-в) left
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    Research on Bitcoin ATMs. Looking for someone highly knowledge able the technical side of Bitcoin ATMs, blockchain analytics, and cryptocurrency risk. Should be able to research (using blockchain public sources, etc.) and answer the following questions: 1) Bitcoin ATM operator wallets: Does an operator use the one wallet address per Bitcoin ATM? The same wallet address across multiple ATMs? Do o...

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    We are looking to create an auction DAPP on Ethereum Blockchain. Applicants must have experience building Dapps- apply with your portfolio.

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    BlockChain expert 6 дні(-в) left
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    Need a experienced writer in the area of Block-chain. Please bid if you have expertise in Block-chain area.

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    12 заявки
    Blockchain Network Audit 5 дні(-в) left
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    Looking for a Blockchain Expert Developer with GO & C++ Background SUMMARY Crypto Poker Exchange (CPE), an online poker gaming platform, is looking for a Blockchain Developer who has experience in building and auditing blockchain-based software. Specifically, CPE is looking to perform an audit of its current source code, which consists of several blockchain nodes designed to enable transact...

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    Create article for crypto project 5 дні(-в) left
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    Hi, I need someone to create a well consctructed article to explain a crypto / blockchain project.

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    We need to fork the ethereum blockchain and release as our own blockchain with an additional feature to the blockchain. Forking the ethereum blockchain with the change of creating a wallet in blockchain to collect fee from every transaction and at beginning of month distribute those fees to coins holder based on the percentage of coins they hold. For example i hold 10% of coins in my address the...

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    We are early-stage logistics startup based in Bangkok, Thailand which has been operating for more than a year in Southeast Asia. Our company are in fund-raising stage ready to scale up and are looking for skillful and talented people to join our team. If you are interested, feel free to contact us. High Payoffs, Big Equity and Big investors. Qualifications: 1. Specializing in back-end, software e...

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    Need A Cryptocurrency Website FrontEnd Developer.....I want to redesign my Cryptocurrency exchange website!

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    Live Chat Support - Team - Technical 5 дні(-в) left
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    FREELANCERS FROM VIETNAM or PHILIPPINES ONLY Looking to set up a chat support team for technical services. Only experienced BPO professionals needs apply, looking for 5-10 full time staff. I will most likely be contacting you on this job. Details of the project will only be made available over the video call. I have 20 years of BPO experience, testing freelancer for my sister's busine...

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    Write a technical plan 4 дні(-в) left
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    This technical plan is for the a solar blockchain development. The purpose is of this plan is to present to software development team to develop. The blockchain will gather energy consumption and generation information from solar energy systems installed on user buildings. The data collected will be used to calculate how much tokens are to be awarded to energy producers. The preferred blockchai...

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    stellar Developer 4 дні(-в) left
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    i am looking for someone who have worked on stellar ( crypto ) . more details will be shared later . Thanks

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    Lead blockchain core developer to create new coin 4 дні(-в) left
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    We are starting new crypto platform and I am currently collecting team. It is open source community project but I need experienced blockchain developer for that team. I will pay initial payment to join in as lead developer and to create coin together with others. When coin and chain is created you should continue and represent platform as lead developer. Platform rewards are paid every month. New...

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    Build Crypto Wallet 4 дні(-в) left
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    I need a lightweight multi-currency wallet. This wallet will NOT have to download the entire chain for all the currencies in this wallet. This wallet will run on Windows, IO, Android and Other Operating systems. The user should be able to switch between the coins and utilize the features of each wallet. 1. Bitcoin Private (BTCP) A. This wallet MUST be able to utilize both Transparent (b) and Shi...

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    Build A Simple Crypto Coin for me, can be a Hardfork 4 дні(-в) left
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    I need a bitcoin hardfork developed and set up as a mineable coin. Everything else will be exactly the same as the original bitcoin but larger blocks and it will be forked at a block just before segwit. Need it all set up and tested with Linux, windows and Mac wallets. It can be a Zcash hardfork as well so it need to be Bitcoin or Zcash, I mean we will decide it with the discussion. You are respon...

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    I am looking for a PHP/MySQL expert that has full knowledge of coding using PHP with the EOS Blockchain. I want a simple PHP script created that will: 1. create a EOS Transaction (with memo) by simply sending $0.001 EOS from my ESO Wallet #1 to my EOS Wallet #2 2. get the completed ESO transaction ID and insert in MySQL database Here is how I see it working: - you create a php page with si...

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    Need Modifications done to the EOS/BTS Graphene blockchain. Need two smart contracts written and compiled. Must be experienced on this Blockchain. Require by default to make every transaction into stealth mode. Require an auto-boot up system script in Vitual tmux terminal mode or other, if a server goes down with Blockchain start, cli-wallet started, API started. faucet started in 4 different wind...

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    Needs to hire 10 Freelancers You will be working with SLP tokens. If you’re not familiar with SLP yet, it’s okay. If you’re a capable developer you can learn it as we go. Javascript/typescript backend Either one is a must. It would be good if you have experience with charts/graphs. You’ll be working on a variety of projects as we go on, starting with an SLP “Mint&rdqu...

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    Backend Developer 3 дні(-в) left

    Cryptocurrency exchange Chaincreator ([увійдіть, щоб побачити URL]) is looking for a backend developer for its vault product with strong DevOps skills. Responsibilities • Collaborate as a full-time member of the dev team. • Analyze requirements and propose solutions, designs, and interactions that deliver the value of the product and its features. • Deliver data-driven, complex bac...

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    implementation of keccak mining algo on mainnet 3 дні(-в) left
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    project is to implent a keecak miner on mainnet that will work with a keecak Asic miner that is selling on the market

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    Smart Contract Supply-Chain Management Website (Node, Solidity) 2 дні(-в) left
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    I would like some help in building a website using solidity with a timed smart contract that manages the transactions and notes the ownership changes of the 4 players (producer, transport, wholesale, consumer) to ensure transparency of object(for instance apple)'s exchange through the supply chain. I am skilled in web-development and am mostly looking for help with how to work with the smart ...

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    Italiano realizzazione di una applicazione che utilizza la blockchain Digibyte ( digi-id + pagamento con digibyte ). La webapp deve essere un semplice e-commerce fra utenti vicini fra loro (es: max 10 km o 7 miglia - geolocalizzazione necessaria ), tramite una fotografia di un oggetto usato o nuovo ( una solo ) , con pagamento immediato tramite Digibyte e ritiro a mano dell'oggetto. preferib...

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    Ico, token, blockchain 1 день left

    I need blockchain expert, blockchain developer for a good project!

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    I am looking for motivated freelancer to build me a Stable coin such as Tether (USDT) if you are Blockchain devolper then you already know that it's running on OmniLayer [увійдіть, щоб побачити URL] and it can be duplicated however we need our own Blockchain and backend. So my goal is to build a Second Tether, similar like the Existing Tether LTD, However what I want is the Value will never b...

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    Someone who has already been integrated liquidity API of an renowned exchange like binance or kraken or any other established one. 1 week deadline is there. My existing exchange is Angularjs based.

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    Need to create cryptocurrency 15 годин(-и) left
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    I need you to develop some software for me. I would like this software to be developed.

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    Azure Blockchain Expert 8 годин(-и) left
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    We are looking at using Azure Blockchain Data Manager with Azure Service Bus and Azure Events Grid to exchange data between multiple organisations (parties) working on the same project Someone who has worked with Azure blockchain or can work on it for sure should apply

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    Build a website to monitor crypto dapps 8 годин(-и) left
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    I want to build a website which monitors crypro dapps - volumes, transactions, number of players. The site should be a directory where the dapp is listed and can be filtered to show different views. I can show working example of what I want. MUST have experience working on crypto projects and blockchain.

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    Remodify Bitcoin Wallet Website 7 годин(-и) left
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    I need an existing bitcoin wallet website rebuilt. I need you to design and build I need you to design and build my personal website.

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    Build a blockchain based YouTube alternative network Закінчується left
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    This is a project to build a platform similar to YouTube, which is based off blockchain technologies, and has a fair payment system to creators and opt-in ad viewing from users. *BTW no upfront pay its a % of all potential earnings in the future*

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