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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    54 jobs found, pricing in USD

    We are in the home security alarm business. Similar to ADT and Brinks that has also expanded to include smart home technology such as controlling your lights, opening the door, raising the garage door and controlling the thermostat. The system now works by being installed DIY and is connected by wi-fi. There is a motion detector, window sensors and the option to have a video camera added. There ...

    $30 - $30
    $30 - $30
    0 bids

    I'd like to build a trading engine with using REST API. These are the optional api service what I am thinking of. - [login to view URL] - [login to view URL] - [login to view URL] I wish to develop a trade engine based on rest api preferrably, I have to develop and plug/play existing module to existing backend system. Trading Engine Specs - Node.js as api server - Mongo as database Pleas...

    $456 (Avg Bid)
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    12 bids

    Key features For Coin Development 1 Setting up of Cryptocurrency node servers 2. Set up coin parameters 3. Generation of Blockchain 4. Coin Generation 5. Pool mining 6. Web Explorer 7. Web Wallet 8. Admin Wallet 9. Exchanger Connectivity API

    $614 (Avg Bid)
    $614 Avg Bid
    8 bids

    Hi I have a ERC 20 Smart Contract with very basic functionality that I need to get audited Thanks

    $159 (Avg Bid)
    $159 Avg Bid
    5 bids
    fix cryptoniq payment gateway 6 days left
    VERIFIED

    hello, i've got a paid plugin called cryptoniq that doesn't work properly. Quick fix?

    $80 (Avg Bid)
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    10 bids

    I need a professional blockchain developer to setup my ERC20 wallet app for Android, iOS and web within 7days if possible. My budget is $200 but I can consider increasing it if you impress me

    $397 (Avg Bid)
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    14 bids

    I want you to read this paper from chapter 5-8 to understand the concept... I need you to take the Use cases from the white paper ( chapter 6&7) and make them in to Yellow paper meaning, write how it will be done technically... All I need is just the technical write up of how these use cases can be achieved I want to write a yellow on the project.. What I need is just the write down of the te...

    $486 (Avg Bid)
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    9 bids

    I want to build smart contract of erc 20 token with all pre mined token.

    $1512 (Avg Bid)
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    9 bids

    Dear Readers, We’re looking for a blockchain specialist with experience in building Dapps. A freelancer that can build a simple, basic but safe cryptowallet for the Tronplatform. ([login to view URL]) We want to be able to integrate this wallet with our future gameplatform. It should be able to function as a payment system for our platform. The product we’re looking for is a website ...

    $857 - $1713
    Featured Sealed
    $857 - $1713
    26 bids

    We are an ICO looking for a community manager. We need to build a community on different platforms: Facebook, Instagram, Linkedin, Reddit, Zendesk etc. The proficiency level of english is required and a photoshop knowledge is appreciated. Previous experience in ICO projects is required.

    $17 / hr (Avg Bid)
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    17 bids

    Sell my domain name ( [login to view URL]) if you can get be best proposal we can close the deal also apart from fees and feedback i will pay you a commission

    $48 (Avg Bid)
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    3 bids
    ICO whitepaper writing 5 days left
    VERIFIED

    I need someone to write White paper for my upcoming Decentralized news Platform which consume Blockchain technology to Broadcast and censor news items through Smart Contracts.

    $21 (Avg Bid)
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    5 bids

    we need a blockchain developer to fix an issue in our network. What should be fixed: - Unstable Network  - Upgrade Coin Wallets ( this mean upgrade servers and explorer and everything connected with our coin node ) We are looking for a long-term relationship, when everything is done!

    $157 (Avg Bid)
    $157 Avg Bid
    7 bids

    the supply chain in the FCMG industry is currently trying to develop itself with the high trendiness of blockchain, due to that, it is required to make an academic research (thesis like) about what are the current practices used in the supply chain for the FCMG industry and what are the voids in those practices or issues that blockchain could solve. please keep in mind that the references should b...

    $236 (Avg Bid)
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    35 bids

    The PoC is already developed for a healthcare organisation, the authority of data provided by the patient is to be set. Only who has worked on Hyperledger fabric shall bid.

    $31 (Avg Bid)
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    1 bids

    Need some expert writers who are experienced in cryptocurrency industry and blockchain technology. Technical writing experience is preferred. We need in-depth and well-researched articles.

    $75 (Avg Bid)
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    21 bids

    I need a fully secure Cryptocurrency exchange open for customers in India with a few currencies already listed on it and should be equipped with full KYC.

    $718 (Avg Bid)
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    14 bids
    Bitshare core Development 4 days left
    VERIFIED

    I want to build my own blockchain using Bitshare Core. If you have experience in Bitshare core blockchain, please contact me. I want to hire true developer. Regards.

    $576 (Avg Bid)
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    21 bids

    Looking for a core wallet system for Ethereum, XRP, and ERC token system. The wallet will need to generate new address for users and it must be installed and tested correctly with no security flaws. It would be preferred if you know C++. and have solid security background.

    $432 (Avg Bid)
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    13 bids

    I need a professional to program a digital currency based on bitcoin. 1 - Change the reward rule by mining. 2 - Start the coin mining process through my miners.

    $576 (Avg Bid)
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    19 bids

    We are looking for someone that can do a full wallet re-design of a qt wallet to look something similar to the below. It should be done asap and also requires skills to be able to add a real-time graph like the example that will be getting the price of the coin and an option to see how much your coins were worth over a certain period of time. [login to view URL]

    $166 (Avg Bid)
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    7 bids

    Just quite a simple task. The problem is I need to implement it with segwit to receive coin. The wallet can't receive coin ( not showing up in wallet for incoming coin ) but shows up in blockchain. Once you are done fixing, you will send me apk file to testnet before sending me the source code.

    $184 (Avg Bid)
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    22 bids

    The requirements are been attached and bid only after reading the document ! The entire project is been already opensource where you need to run the opensource git and then customize few changes. *** Again Bid only those whom really can work on this ***

    $206 (Avg Bid)
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    8 bids

    Hi, I thus need only experts who have already with with mining pools ! The requirements are been attached and bid only after reading the document ! The entire project is been already opensource where you need to run the opensource git and then customize few changes. *** Again Bid only those whom really can work on this ***

    $18 / hr (Avg Bid)
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    7 bids

    I'm looking for DAG expert. will discuss more via FL.

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    8 bids

    We are going to build a decentralized exchange until Nov 30th. We want to choose true freelancers who have experience in Decentralized Exchange Platform. Please start your proposal with "I can do" and share your built DEX platform. Automatic bids or copy & pasted bids will be rejected. Regards.

    $1996 (Avg Bid)
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    39 bids

    I need someone to help with gitian builder. It keeps failing with an miniupnpc checksum error. I need someone to fix my code so that i dont get this error and to fix any other errors that i might get after the miniupnpnc thing.

    $23 (Avg Bid)
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    1 bids

    Hi, we are looking for freelancers who can help us customize certain open-source security solutions to use elements of blockchain ledgers and fit into our larger set of products and services. We might be interested in both project-based and pay-per-hour long term cooperation. The key requirements: - skilled at golang - experience with information security and ideally development of security prod...

    $22 / hr (Avg Bid)
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    23 bids

    Cryptocurrency exchange startup is looking for senior php developer. Your responsibilities as a member of dev. team would be to write from scratch the cryptocurrency exchange platform. Your key contribution to the team would be to bring the technical knowledge about cryptocurrency/blockchain technology and security best practices. Technical requirements - familiarity with *nix ecosystem is mandat...

    $2443 (Avg Bid)
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    We develop the game system separately. Please create a system that can purchase cards like the current Gods Unchained. Please collect all 10 packs and turn on the function which can display only rare. Please be sure to replace graphics. [login to view URL]

    $1029 (Avg Bid)
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    15 bids

    I need a coin for ICO. It should be listed on exchange

    $896 (Avg Bid)
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    20 bids

    I know about cryptocurrency, but I am making no profit from it So I am in need of someone to teach me more about cryptocurrency Investments and al I need to know so as to make profit from it

    $772 (Avg Bid)
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    18 bids

    We want to develop a paper wallet generator for use in Cryptoart ([login to view URL]). Specifically, we want to fork the code from [login to view URL], then slightly modify the results page to fit our needs. More information found here: [login to view URL]

    $1190 (Avg Bid)
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    27 bids

    We need a smart contract developed with the ERC721 token. An API or SDK will need to be developed as well to communicate with the smart contract to develop our Real Estate Dapp. See below for the Dapp functionality for our MVP. This could be a long term engagement for our full Dapp, if the MVP developed is up to our standard. *1.* Information Architecture - create a database that houses the UUI...

    $11384 (Avg Bid)
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    66 bids
    I NEED A FORKED EOS 2 days left
    VERIFIED

    Fork the EOS block chain for this project

    $3980 (Avg Bid)
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    24 bids

    I am looking for blockchain expert who can change design and integrate NEO into existing site built by Ruby on Rails. Here is the git repo of script. [login to view URL] And I need to integrate btc, ETH, ERC20 and NEO. I have design ready. Please only apply only when 1. you have portfolio of exchange platform you created. 2. you are expert in Ruby on Rails. Budget:3000 Timeline: 40days Looking ...

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    I need an experienced blockchain developer to develop a Decentralised Exchange like [login to view URL] Presently the exchange allows ETH to ERC20 Tokens. I want One particular Token to ERC20 Tokens. Please bid.

    $1056 (Avg Bid)
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    27 bids

    1. We are a Cryptocurrency Exchange based out of Lithuania 2. We are currently working on serving European Clients 3. We are in need of a Blockchain Developer who can support us for development and maintenance of our website/server and services 4. The Person should be well conversant with Website/Blog Creation, Server Set-Up, Blockchain Development 5. The Person would be hired as a Partner in the ...

    $12 / hr (Avg Bid)
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    9 bids
    Waves platform expert 1 day left
    VERIFIED

    I need a person who have worked on waves platform as a developer. I need some modification in waves platform open source mobile wallet application.

    $427 (Avg Bid)
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    4 bids

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    Sealed NDA

    we need a platform which can be used to share files over blockchain (Metadata) . files encrypted and print them using a verified/trusted printer on blockchain to make sure copyrights of founder/designer are secured and his file is not leaked . more details could be found here : [login to view URL]

    $5453 (Avg Bid)
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    we need a platform which can be used to share files over blockchain (Metadata) . files encrypted and print them using a verified/trusted printer on blockchain to make sure copyrights of founder/designer are secured and his file is not leaked .

    $2926 (Avg Bid)
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    8 bids
    Finish a PHP project 1 day left
    VERIFIED

    Add these to my current project: - Comprehensive guide of how to run all commands in ubuntu to create, delete, set passwords to wallets. (create new wallet, balance of each wallet master and clients, log file of all transactions, get seed password from wallets, etc.) - error message if there’s not enough funds in the admin wallets (example: sorry maximum amount to exchange right now is 0....

    $431 (Avg Bid)
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    24 bids

    I am more into crypto and developed an ecomerce store and had a coin developed from a dev before. I want to integrate that coin with my ecommerce store, I know basic knowlege but want to learn more technically in detail. Looking forward for a good teach in crypto. Thank you

    $616 (Avg Bid)
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    5 bids

    Multi coin mining portal development Looking developer from Chennai only

    $443 (Avg Bid)
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    9 bids
    Masternode ranking website 23 hours left
    VERIFIED

    I am looking for someone to create masternode ranking website similar to: [login to view URL] [login to view URL] [login to view URL]

    $201 (Avg Bid)
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    12 bids

    We are looking for bidders on virtual currency bank in Philippines Projects: 1. ERC-20 Coin creation 2. Coin white paper writing 3. VC-PHP Exchange core 4. Mobile app for the exchange 5. Web app for the exchange. Note: Should be in Philippines. Should be a legitimate entity [login to view URL]

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    Hello, there is a platform called Flixxo. Flixxo is a decentralized video sharing platform where people can earn tokens called "Flixx" by uploading videos or watching videos. I need help creating a smart contract to split the revenue earned between content creators and myself. I need you to set a smart contract as a withdrawal address And set the splitting of flixx tokens within that s...

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    website is built in lavarel, ubuntu make it mobile and iPAD responsive + deploy tokens (truffle) on mainnet.

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    15 bids

    I need Bitcoin wallet with good features

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    24 bids

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