Blockchain jobs

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. Hire Blockchain Developers

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    382 jobs found, pricing in USD

    Looking for a blockchain consultant who has knowledge of trading exchanges and network security.

    $92 (Avg Bid)
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    11 bids

    Shall attach a brief document explaining.

    $3151 (Avg Bid)
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    26 bids

    I wanna build an altcoin based on BTG. Technical specs are follows.. - 1,000,000 premime1,000,000 premime 22,000,000 total supply Modify block reward from 12.5 to 13.5 (8% sent to a specified address) - 22,000,000 total supply - Modify block reward from 12.5 to 13.5 (8% sent to a specified address) Timeline : 3 days Budget : 300 USD please review it and ping me.

    $357 (Avg Bid)
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    7 bids

    Hi I need to hire a blockchain app developer to make an app. I need someone with good knowledge and willing to work long term. Thanks Karishhma

    $1156 (Avg Bid)
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    4 bids

    Need a Ethereum Smart Contracts guru to assist with the development of a smart contract.

    $450 (Avg Bid)
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    3 bids

    Project Description We are looking for someone that has already experience with pre-ICO and ICO on the ethereum blockchain (erc20). We wil USE smart contract to accept payment, We already made our token on the ethereum blockchain--100 % The whitepaper & LOGO are already made----------------------------------------80 % The server and domein are already paid----------------------------100 % But we need a skill programmar that will make the website etc. * against Doss attack *Pre-ICO**ICO management area (Client area) with ico features * Bitcoin, ethereum, custom erc20 token wallet integration * referral, affiliate bonus development * lending platform development like * internal exchange development *Website design & skilled graphics * profile,dashboard,settings and other functions * other advanced features and complete back end development * We will provide example ico websites for the design without third party back end, the ethereum should be able to go smoothly on the site no link to other third party gateways. i Can provide further details Payment after completion of project. The payment will be in ethereum or bitcoin. note: developer will get additional bonus (%) after ico,

    $5262 (Avg Bid)
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    14 bids

    I need a blockchain expert only to fork an ethereum blockchain using github. More details will be shared over chat.

    $362 (Avg Bid)
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    4 bids

    Hello, Looking for an experienced blockchain / Solidity developer for building smart contracts and ERC-20 token for a startup company. This is a fairly straightforward project and relatively simple structure. At the moment we need someone to develop all of the blockchain tech from the ground up, followed by ongoing upkeep and utilizing your expertise through the ICO process as well. This project also includes several other sub-projects, including Dapp development. We are willing to work with a flexible schedule for the right developer. Regards, Bill.

    $4556 (Avg Bid)
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    25 bids
    Project for Valentin S. 9 days left
    VERIFIED

    Hi Valentin, How many hours would you need to translate a Javascript of about 350 lines (fairly well commented) to Lua?

    $20 / hr (Avg Bid)
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    1 bids

    Hello, We need to build saas platform based on Laravel Spark, this platform should be very simple, we will add Bitcoin Wallet with API and STRIPE Subscription. You should check your Bitcoin wallet and transfer fund to another btc wallet. Need expert with experience on it.

    $194 (Avg Bid)
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    13 bids
    ATM Application for Bitcoin 5 days left
    VERIFIED

    We are looking for someone with knowledge and experience with major ATM vender hardware and software integration. Experience integrating Bitcoin related APIs is a plus, but the most important experience is working with integrating ATM hardware and software. This project may involve working with traditional ATMs for integrating software with the physical hardware, such as an ATM application, and/or it may involve working with Bitcoin/ crypto-currency ATMs (kiosks) to integrate 3rd party applications.

    $4555 (Avg Bid)
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    5 bids
    Project for Valentino P. 8 days left
    VERIFIED

    Hi want to discuss a Project related to Crypto Mining. Please send us a message back to Discuss

    $10 (Avg Bid)
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    1 bids
    Smart Contracts 5 days left

    Will get this right sooner of later. Looking for someone to write smart contracts on Ethereum platform to plugin to our wordpress website.

    $2110 (Avg Bid)
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    33 bids

    I am looking to release a new ICO (initial coin offering). The platform will come later, but I need a page that will help design my coin, make secure wallets, do blockchain for a number of coins. This all needs to be secure. I also need to be able to add my whitepaper, roadmap, team and other things. IF you have not ever released an ICO page please do not bid on this project... here are some places you can look for ico pages [url removed, login to view], [url removed, login to view], [url removed, login to view] these are a few. Pleas again if you have not worked on this platform do not bid. There will be more to add to this as we speak but this is a brief overview... we will have to look into ecr20 so you must have blockchain knowledge. I want to add in my team bio, whitepaper, logo (created here), and roadmap. You must know how to have secure wallets and start a blockchain preferable ecr20 or own. It needs to roll out in stages with bonus, countdown clock, and take cryptocurrency ie btc, ltc, eth.

    $3000 (Avg Bid)
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    19 bids

    Must be UK based Must have experience of cryptography and encryption Must have experience creating ERC20 Tokens

    $49 / hr (Avg Bid)
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    What i need is : •A secure Crypto website that accepts deposits from the public and store their coins •A payment network which let them transfer crypto-currencies to each other fast and securely Secure Crypto Wallet Abstract Virtual currencies and mobile banking are technology advancements that are receiving increased attention in the global community because of their accessibility, convenience, speed and growth rate. However, this popularity comes with growing security concerns, like increasing frequency of identity theft, leading to bigger problems which put user anonymity at risk. One possible solution for these problems is using cryptography to enhance security of Bitcoin or other decentralised digital currency systems and to decrease frequency of attacks on either the communication channels or the system storage. This report outlines various methods and solutions targeting these issues and aims to understand their effectiveness. It also describes Secure Crypto Wallet, standard Crypto transactions client, enhanced with various security features and services. Project Proposal Workflow ·Every user registers to website with respect to his/her unique ID gets multiple crypto wallet address, which they will use for deposits (Confirmed by respective Blockchains) ·Every Deposit is credited after 3 successful confirmations on respective blockchains ·Users can generate any number of address through their profiles (all address will be linked with their unique ids) ·Each user get a unique address for every crypto to do internal transactions (which will be fast and without any blockchain fee) ·For an extra security measure, users can add google authentication to their withdrawals and logins, although 2FA email security measure will be forced on every profile. ·Users Dashboard: o A settings page where users can update their profile settings (Attributes to be provided) o Balance page to show up their current BTC, LTC & ETH balance o Transaction pages for each crypto-currency Project Proposal : Admin Panel ·Admin have access to all users wallet to update profile details. ·To approve all withdrawals admin have to approve from their panel ·Admin can ban/hold any account for whatever time they want – they can start it back too. ·Website pages can be updated by super admins only ·Admins can update latest news on website front page ·Users balance can not be updated from admin panel, it have to be updated from database.

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    Dear we need Block chain developer for x11 coin. Coin already functional and we need split block reward in to three parts. 1: 45% to miners who will mine. 2: 45% will equally divide wallets who have 1000 Coins 3: 10% to self development wallet we need Block chain experienced developers, we don't deal on BTC or any other currency or platform.

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    Ethereum ERC20 smart contracts in solidity 0.4.20 one-time fixed issue , all tokens placed // simple circulation rules , no growing algorithm // + some additional specifications /// pls bet & chat me asap

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    Looking for block-chain developer and cryptocurrency expert. Someone who has proven expertise in bitcoin

    $27 / hr (Avg Bid)
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    I am looking for someone to help create the landing page for an ICO project. Please submit examples of your work. Looking to get started ASAP. **Please reply with the word "CRYPTO" somewhere in your response or I might skip over you**

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