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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    51 работ(-а,-ы) найдено, цены указаны в USD
    Customize mobile app 6 дней(-я) left
    ПОДТВЕРЖДЕН

    I wanna customize mobile application. If you are a mobile expert, please contact me.

    $527 (Avg Bid)
    $527 Ср. заявка
    19 заявок(-ки)

    This will be for a wordpress site . if youre not comfortable working in wordpress dont bid. this will be what i need for you to create: users will be able to send crypto to their buddypress friends and receive. we will also be a marketplace using wcfm where users can create their own store offering products and services, users can use their internal wallets to pay for products and services. {it is on a dedicated server} 1) when users sign up for the site, the site needs to create them a wallet for the following crypto )bitcoin, tectonic, apecoin) 2) after signing up user will pick one main token out of the three they would like to make their default choice of use for payments within the site. once chosen it will be 45 days before they can switch their main. 2) i need these wallets to be h...

    $1116 (Avg Bid)
    $1116 Ср. заявка
    3 заявок(-ки)
    Looking for Cryptocurrency Development -- 3 6 дней(-я) left
    ПОДТВЕРЖДЕН

    Looking for Cryptocurrency Development Services, using Blockchain Methodologies. Looking for end to end services, including Smart Contracts etc. Please contact only if you have prior experience and successfully launched on exchanging platforms.

    $1385 (Avg Bid)
    $1385 Ср. заявка
    16 заявок(-ки)
    Looking for Cryptocurrency Development -- 2 6 дней(-я) left
    ПОДТВЕРЖДЕН

    Looking for Cryptocurrency Development Services, using Blockchain Methodologies. Looking for end to end services, including Smart Contracts etc. Please contact only if you have prior experience and successfully launched on exchanging platforms.

    $1622 (Avg Bid)
    $1622 Ср. заявка
    6 заявок(-ки)
    Btc cloud mining app for smartphone 6 дней(-я) left
    ПОДТВЕРЖДЕН

    I need an application for btc cloud mining , see the example below: * withdraw shoud be 0.005 btc * the app will be developed for public use

    $1303 (Avg Bid)
    $1303 Ср. заявка
    18 заявок(-ки)
    Crypto Exchange 6 дней(-я) left

    I just wanted to develop crypto exchange for me.

    $4219 (Avg Bid)
    $4219 Ср. заявка
    17 заявок(-ки)

    Hi, everyone. I'm looking for talented Near programmer. Your role is to fix some issues from codes. If you're interested in this code, Please hit me up.

    $821 (Avg Bid)
    $821 Ср. заявка
    10 заявок(-ки)
    Create NFT collection -- 2 5 дней(-я) left

    I need a skilled NFT designer/artist who could create a collection based on our DeFi platform's metaverse. Note: you must have a profile on Foundation, KnownOrigin or OpenSea NFT marketplaces and provide a link to it in your message

    $1196 (Avg Bid)
    $1196 Ср. заявка
    33 заявок(-ки)
    Exhcange crypto & Tradeing 5 дней(-я) left
    ПОДТВЕРЖДЕН

    Hi there I want to platform Dev with UI Design in Figma UI Development React Wallet Creation for Spot, Futures, Margins, P2P APIs Integration for PayPal

    $1983 (Avg Bid)
    $1983 Ср. заявка
    38 заявок(-ки)

    Looking for someone who is very familiar with crypto in general and doing fundamental analysis specifically. Job description, responsibilities and requirements: - You would be doing a fundamental analysis of several projects every day, a brief technical analysis, and then you would generate a report for each project with a recommendation of buying or not, confidence level, and recommended entry price. - Proven deep knowledge of crypto space is required. - This would be an ongoing project. - Strong communication and analytical skills.

    $8 / hr (Avg Bid)
    $8 / hr Ср. заявка
    15 заявок(-ки)
    Build a poker website for Crypto 5 дней(-я) left
    ПОДТВЕРЖДЕН

    Build a poker (Texas hold ‘em) website that runs on Web 3.0 and accepts crypto payments (ETH, BTC, USD). Contact me for more details.

    $783 (Avg Bid)
    $783 Ср. заявка
    65 заявок(-ки)
    New features for the metaverse. 5 дней(-я) left
    ПОДТВЕРЖДЕН

    Metaverse changes 1. Won’t let me walk backwards 2: I cant buy land 3: We need ready player me imports 4: Hide the buy land button in a nice area to buy land 5: Only show extract profit of met averse money on a set of master wallets 6: Make another extract profit for each personal person to trade tokens 7: Build a university in the center of the land 8: Create the school and make it active and functional 9: fix the walking speed

    $250 - $750
    Скрытый
    $250 - $750
    28 заявок(-ки)
    Need to built smart contract with Dapp 5 дней(-я) left
    ПОДТВЕРЖДЕН

    I need a smart contract for Binary plan with ROI with Dapp. bid cost will be the final

    $768 (Avg Bid)
    $768 Ср. заявка
    21 заявок(-ки)
    Build me a arbitrage bot for solana ecosystem. 4 дней(-я) left
    ПОДТВЕРЖДЕН

    this is eerily similar to what I want BUT I want the one made for me to be written in GOlang and accept a WS endpoint. Would like to add more exchanges and find a dev who is willing to do updates on bot from time to time obviously paid hourly when doing updates. DEX primarily

    $578 (Avg Bid)
    $578 Ср. заявка
    14 заявок(-ки)
    Block chain analysis 4 дней(-я) left
    ПОДТВЕРЖДЕН

    we need someone who has a lot of experience in blockchain analysis to identify cluster address that we will provide against BTC address

    $141 (Avg Bid)
    $141 Ср. заявка
    22 заявок(-ки)
    Update React based chrome extension 4 дней(-я) left
    ПОДТВЕРЖДЕН

    Write a proposal by answering (10+70). Otherwise won’t read your proposal. I am looking for a freelancer who can do the following to my existing chrome extension code 1. Make the extension auto updatable without going through chrome Store submission (something like over the air updates for React Native app) 2. Add mixpanel analytics to track user behaviour FYI: the extension is related to web3

    $122 (Avg Bid)
    $122 Ср. заявка
    8 заявок(-ки)
    Privacy as a Service on the Blockchain 4 дней(-я) left
    ПОДТВЕРЖДЕН

    Request details Development of Layer 2 - Secure privacy focused apps and contracts on EVM compatible chain. ZK-Snark - Zero Knowledge Proof transactions and Oracles. Own chain development.

    $574 (Avg Bid)
    $574 Ср. заявка
    26 заявок(-ки)
    NFT Marketplace 4 дней(-я) left

    Our company needs to develop an NFTs Marketplace where focused on audiovisual artworks

    $8430 (Avg Bid)
    $8430 Ср. заявка
    51 заявок(-ки)
    Blockchain and tokens developer 4 дней(-я) left
    ПОДТВЕРЖДЕН

    We need 2 professional Blockchain and tokens developer with 10 years experience for ongoing job. Send CV. Please, send previous jobs.

    $37 / hr (Avg Bid)
    $37 / hr Ср. заявка
    64 заявок(-ки)

    Mobile App Development Website Design Software Architecture Artificial Intelligence AI (Artificial intelligence)

    $9878 (Avg Bid)
    $9878 Ср. заявка
    59 заявок(-ки)
    Arabic translation (English to Arabic) 3 дней(-я) left
    ПОДТВЕРЖДЕН

    We are looking for a native Arabic speaker ready to translate from English to Arabic. Texts specifics: cryptocurrency exchange interface texts. Requirements: - Arabic native speaker - High communication and writing skills - Basic knowledge of cryptocurrencies Waiting for your reply. Thank you.

    $19 / hr (Avg Bid)
    $19 / hr Ср. заявка
    142 заявок(-ки)

    the exact piece of code is here. Indexing in this is incredibly slow and it is urgent to make as many quick performance enhancements as possible.

    $53 / hr (Avg Bid)
    $53 / hr Ср. заявка
    4 заявок(-ки)
    Digital fashion tokenomics strategy is what I need help with 3 дней(-я) left
    ПОДТВЕРЖДЕН

    Hi, I have a startup n trying to define the tokenomics for this. Just theoretical at this point. Is there anyone who can help? It's a digital fashion startup and limited budget I want to hear the technical side of your metaverse fashion store and related nfts. Also an estimate effort n price for creating same Kind regards

    $1031 (Avg Bid)
    $1031 Ср. заявка
    18 заявок(-ки)
    Finish NFT Website. 3 дней(-я) left

    We have an NFT site that needs integrating with the created smart contract everything else is done just the smart contract integration and deployment. On ethereum and polygon Offering $650

    $747 (Avg Bid)
    $747 Ср. заявка
    68 заявок(-ки)
    NFT game in bsc -- 2 2 дней(-я) left

    I need a blockchain developer for a project on the BSC network. Low complexity project work.

    $5331 (Avg Bid)
    $5331 Ср. заявка
    26 заявок(-ки)
    NFT game in bsc 2 дней(-я) left

    I need a blockchain developer for a project on the BSC network. Low complexity project

    $3188 (Avg Bid)
    $3188 Ср. заявка
    42 заявок(-ки)
    Build a WAX blockchain NFT game 2 дней(-я) left
    ПОДТВЕРЖДЕН

    Hi, We want to build a simple wax blockchain game (click to earn) Just like Farmers World. you must have experience with WAX blockchain & alcor exchange.

    $250 - $750
    Скрытый Соглашение о неразглашении
    $250 - $750
    29 заявок(-ки)

    Hi I want an entire NFT collection. Please only contact if you can handle it. Also this collection must be: - Unique - On Polyon Network - Have potential to get sold

    $1424 (Avg Bid)
    $1424 Ср. заявка
    52 заявок(-ки)

    In this position as a Senior Blockchain Engineer, you will be building robust, resilient, and scalable blockchain networks for some of the most iconic brands in the world within industries such as: entertainment, finance, gaming, retail, and others. Some of your top priorities in this role as you are designing, building, and maintaining blockchain-based web3 services are to ensure Security, Reliability, and scalability with performance and elegance top of mind while sustaining brand alignment. The team you’ll be joining will comprise of some of the leading engineers & minds in blockchain & web3 development coming together to work on brands that have an international reach & visible, direct impact on billions of people. Responsibilities: Design, build, and maintain bloc...

    $37 / hr (Avg Bid)
    $37 / hr Ср. заявка
    41 заявок(-ки)
    Blockchain Cardano Devloper 2 дней(-я) left
    ПОДТВЕРЖДЕН

    Position Overview: We are seeking a highly skilled and motivated Blockchain Cardano Developer to join our team. The successful candidate will be responsible for designing and developing decentralized applications (dApps) on the Cardano blockchain platform. They will work closely with our team of developers, as well as the Cardano community, to identify and implement new features, troubleshoot and debug code, and improve the overall performance of the Cardano blockchain. Responsibilities: Design and develop dApps on the Cardano blockchain platform Write smart contracts using Solidity and Haskell Collaborate with the Cardano community to identify and implement new features Troubleshoot and debug code Collaborate with other developers to improve the overall performance of the Cardano blockc...

    $1926 (Avg Bid)
    $1926 Ср. заявка
    24 заявок(-ки)

    Necesito alguien que entienda el lenguaje de programación Solidity para que revise un contrato de aproximadamente 1000 - 1400 líneas de código (funcionando correctamente) para que me explique a grandes rasgos cómo funciona.

    $165 (Avg Bid)
    $165 Ср. заявка
    7 заявок(-ки)
    设计一个超级web3网站 2 дней(-я) left

    设计一个超级web3网站,面向全球用户,在上面卖鞋子。数字概念,跑步就可以赚钱

    $10 (Avg Bid)
    $10 Ср. заявка
    5 заявок(-ки)
    Opensea NFT collection 1 день left
    ПОДТВЕРЖДЕН

    Hello I need someone that could gather data from NFT collection available on Open sea. I need certain data to be extracted as for example: Age of the collection Amount of NFT Last sales 7 -15 days Floor price of the collection Numbers of NFT never sold since mint …..

    $78 (Avg Bid)
    $78 Ср. заявка
    24 заявок(-ки)
    Looking to fullstack web3 developer 1 день left
    ПОДТВЕРЖДЕН

    I am looking for fullstack web3 developer who can build NFT marketplace like opensea, with admin panel. Apply only if you can complete this project.

    $2089 (Avg Bid)
    $2089 Ср. заявка
    34 заявок(-ки)
    Blockchain Freelancer 1 день left

    It's a simple system tonconvert pdf into data and store it on blockchain

    $7 / hr (Avg Bid)
    $7 / hr Ср. заявка
    5 заявок(-ки)

    Hi freelancers, We are seeking a senior(L5) level front end developer for our ongoing project. Here I write the brief of the project. Backend is Node.js and you should collaborate the backend developer for API changes. Frontend is React with hook and redux. If users sign up, they should select the membership plan. If skipped, trial of a week will automatically work. Users then select their preferred images to buy. They are restricted to buy high level images according to the membership plan they chose. We are going to add much more functionalities to the project. Please send proposals if you have tasted such a this style of project. NFT or other blockchain techs are bonus. Please upload your senior front end resume for us to choose the best one, or you will be missed out. Re...

    $1180 (Avg Bid)
    $1180 Ср. заявка
    34 заявок(-ки)
    Custom Blockcert 1 день left
    ПОДТВЕРЖДЕН

    Create a custom version of the blockcert platform (app+site). Objective: to rebrand the various components and enrich them with some additional functionality aimed at spreading them on the market: - the possibility for certificate issuers not to have or manage crypto wallets (they would pay a subscription or simply could use paypal or a card) - Improved UI/UX for a better user experience, especially on the certifier side (e.g. a school), possibility to issue certifications for students and keep track of them in an easy way - Use a content server (users will save space for life) in order to keep a printable copy of the certifications and any other files (for example the thesis) - evaluate the possibility of connecting a private blockchain of the hyperledger fabric type to blockcert

    $796 (Avg Bid)
    $796 Ср. заявка
    33 заявок(-ки)
    Need ML Engineer 1 день left

    Two Projects: 1.) Need someone to build a 2.7B parameter model for the Bittensor Tao crypto project 2.) Need a custom ai for my IT services business; want to connect it to my helpdesk ticketing system. train it on past 10yrs ticket history + other computer hardware/software systems. The desired outcome is that it will (a.) connect via api to my ticketing system, open/close/document customer tickets (I.e. unlock account, map drive, etc), (b.) it will need to access client networks to actually perform the work.

    $17262 (Avg Bid)
    $17262 Ср. заявка
    22 заявок(-ки)

    I am planning to build crypto wallet app. requirements: - crypto exchange - own coin - transfer figma design will be shared via chat

    $23 / hr (Avg Bid)
    $23 / hr Ср. заявка
    35 заявок(-ки)
    Bybit API and Python -- 2 1 день left
    ПОДТВЕРЖДЕН

    I need an expert in accessing the ByBit Exchange API to create orders using Python methods.

    $31 / hr (Avg Bid)
    $31 / hr Ср. заявка
    25 заявок(-ки)
    Smart Contract for WAX 1 день left

    Update existing smart contracts and connect to the front end on WAX blockchain

    $24 / hr (Avg Bid)
    $24 / hr Ср. заявка
    25 заявок(-ки)
    Setup Server AWS untuk website blockchain wallet 1 день left
    ПОДТВЕРЖДЕН

    Halo saya mempunyai project blockchain, sebelumnya project tersebut telah berjalan sukses namun dikarenakan satu dan lain hal. project tersebut dihentikan sementara. Projectnya adalah crypto wallet, sekarang saya ingin menjalankan project tersebut, namun pembuat sebelumnya sudah lost contact di karenakan sudah setahun lebih. Saya membutuhkan bantuan untuk mensetup semua server (AWS) sehingga dapat berjalan kembali Semua files saat ini ada di bitbucket, sebelumnya saya menggunakan aws namun akun tersebut sudah tidak ada, dikarenakan sudah hampir 1 tahun project ini di pending

    $179 (Avg Bid)
    $179 Ср. заявка
    10 заявок(-ки)
    Mining Pool -- 2 22 часов(-а) left
    ПОДТВЕРЖДЕН

    Looking for an experienced BITCOIN blockchain, web developer / coding partner that can create (from the ground up if necessary) a new unique secure bitcoin mining pool. I am not looking for a replica of any existing open source pools that currently exist however, the source code can be used from such open source code to create this new pool with the full understanding that the code must be fully tested for bugs and security holes. Emphasis on secure. 100% SOURCE CODE MUST BE MADE AVAILABLE DURING THIS ENTIRE PROJECT Key targets that must be met during this project are: 1. Continued development must be factored in. Long term partnership not a one off job. 2. Source code must be made available for 3rd party security audits. 3. The Pool must run on the most recent version of Ubuntu. 4. Mi...

    $2677 (Avg Bid)
    $2677 Ср. заявка
    61 заявок(-ки)
    Deploying own token to Arbitrum L2 17 часов(-а) left

    Hello, I'm looking for blockchain developer who would be able to help me with deployment of my own token to Arbitrum.

    $169 (Avg Bid)
    $169 Ср. заявка
    18 заявок(-ки)
    P2P Crypto Exchange 16 часов(-а) left

    Hi, I'm Looking To Build Like KuCoin. Project Duretion 2 Months Mainly Focus On P2P Trading Based Web App and Mobile Aap. Kindly Contact Me. Who Can Build Same. Or Past Work Experience

    $9379 (Avg Bid)
    $9379 Ср. заявка
    24 заявок(-ки)
    Looking for an Profitable and Approved Crypto Arbitrage Bot 15 часов(-а) left
    ПОДТВЕРЖДЕН

    Hello Everybody, I need an Profitable and Approved Crypto Arbitrage Bot : The Bot will search in any pairs for opportunities and find price differences in all CEX and DEX. At the right time it will make the trades quickly with the appropriate Gas Fee to avoid being outrun by other Bots and send the Benefits to Owner's Wallet. Finally, occasionally it must also be able to use Flash Loans from AAVE and/or DYDX still with features mentioned above. I am a Small Investor in Cryptocurrency my budget for the Bot is between $100-200. No need to answer me if your proposal will be more than my budget. I am waiting for your proposals. Thank you.

    $233 (Avg Bid)
    $233 Ср. заявка
    18 заявок(-ки)
    Create a NFT contract + Circle USDC Checkout Widget 11 часов(-а) left
    ПОДТВЕРЖДЕН

    We need an experienced developer to create a website where a collection of NFTs can be listed for sale, integrate the Circle USDC checkout widget API so people can pay by card or other Coins on different blockchains, and once the NFT is bought and paid for, mint the NFT to the buyers wallet (might require wallet creation through Circle) Please show experience in building such a platform as part of your BID - Do not show lots of useless examples, just show one example in your bid that is related to the above. IF YOU CAN NOT SHOW A SIMILAR PROJECT PLEASE DON'T BID as you won't be considered without an example of similar work!

    $718 (Avg Bid)
    $718 Ср. заявка
    48 заявок(-ки)
    DECRYPTING A SMART CONTRACT 11 часов(-а) left
    ПОДТВЕРЖДЕН

    Hi I am looking for someone to decrypt an encrypted smart contract for me. I don't own the smart contract but need to see the encrypted info in the contract. You must have previous experience of this.

    $527 (Avg Bid)
    $527 Ср. заявка
    30 заявок(-ки)
    I need an Crypto Arbitrage Bot 6 часов(-а) left
    ПОДТВЕРЖДЕН

    Hello Everybody, I need an Low Cost Crypto Arbitrage Bot : The Bot will search in any pairs for opportunities and find price differences in all CEX and DEX. At the right time it will make the trades quickly with the appropriate Gas Fee to avoid being outrun by other Bots and send the Benefits to Owner’s Wallet. Finally, occasionally it must also be able to use Flash Loans from AAVE and/or DYDX still with features mentioned above. My budget is between $100-200. No need to answer me if your proposal will be more than my budget. I am waiting for your proposals. Thank you.

    $162 (Avg Bid)
    $162 Ср. заявка
    20 заявок(-ки)
    Smart contract with dApp 8 дней(-я) left

    I need pre-build ERC721A Merkleproof gas optimized smart contract with all other functions with dapp integrated code. in this way I can use code with multiple project

    $10 - $30
    Скрытый
    $10 - $30
    9 заявок(-ки)

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