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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    56 δουλειές που βρέθηκαν, με τιμές EUR
    Deletion bsc smart contract needed 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need an expert to build me a smart contract with deflection functionality

    €135 (Avg Bid)
    €135 Μέση Προσφορά
    13 προσφορές
    BSC Blockchain Developer Required Urgently 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    ONLY FREELANCERS CAN BID. NO AGENCIES AND STRICTLY NO PROJECT MANAGERS. PLEASE BID WHAT YOU WANT FREELY. DON'T ASK WHAT IS MY BUDGET, YOU WILL BE REJECTED IMMEDIATELY! PLEASE READ JOB POST BEFORE BIDDING I am looking for an experienced BSC blockchain developer. Please see attached. If you can't view, see this link for the video. When the wallet is changed, the details for that wallet should be shown in the profile page. I want it to be done for Please see the video and beforee bidding.

    €14 (Avg Bid)
    €14 Μέση Προσφορά
    7 προσφορές

    my project is based on solana blockchain . want to make a og top project on solana

    €19 (Avg Bid)
    €19 Μέση Προσφορά
    5 προσφορές
    TOLL TAX PAYMENT SYSTEM 6 μέρες left

    TOLL TAX PAYMENT SYSTEM USING SOLIDITY LANGUAGE (BLOCKCHAIN AS BACKEND)

    €8502 (Avg Bid)
    €8502 Μέση Προσφορά
    2 προσφορές
    NFT Game project 6 μέρες left

    This is my project and after check, let me know you can do. If you can do this, I will share my source code

    €20 / hr (Avg Bid)
    €20 / hr Μέση Προσφορά
    25 προσφορές
    privacy and lightweight cryptography for IoT using blockchain 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Purely research project. Research experienced freelancers may contact.3 Paper publications must be derived from the work to submit as PhD security,blockchain and IoT experts having sound knowledge of research can approach.

    €2382 (Avg Bid)
    €2382 Μέση Προσφορά
    15 προσφορές
    Looking to hire expert blockchain developer -- 2 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Looking to hire expert blockchain developer to work on our project i need some one have good knowledge.

    €5 - €9 / hr
    Σφραγισμένο
    €5 - €9 / hr
    16 προσφορές
    Tokenomics: DeFi token 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need to create and design the best token in a professional document from scratch for our DeFi project. Examples: ()

    €104 (Avg Bid)
    €104 Μέση Προσφορά
    18 προσφορές
    Install only figma on react native for application 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Install only figma on react native for application + deployment on apple store & play store

    €555 (Avg Bid)
    €555 Μέση Προσφορά
    79 προσφορές

    using frontend and backend with any framework (truffle/hardhat) you can create a application

    €109 (Avg Bid)
    €109 Μέση Προσφορά
    4 προσφορές

    To verify the digital identity of an individual and to protect his data with the help of smart contracts and blockchain

    €11 (Avg Bid)
    €11 Μέση Προσφορά
    2 προσφορές

    We are looking for a partner with strategic relationships in the Web3/Blockchain/Crypto/NFT/DeFi space to help us promote our services. Our core service are Solidity smart contract audits. We deliver comprehensive reports that identify vulnerabilities in the code and help secure projects. The reports are also tailored to be understood by non-technical readers and provide a crucial document to complement existing marketing strategies. Please get in touch to find out how we help our clients boost their marketing efforts with one of our audits. [ABOUT YOU] If you are currently working (or have in the past) with trustworthy Web3 projects which have not had an audit yet (which these days is mandatory to succeed in the space) we offer a generous 12.5% commission for successful referrals. The p...

    €4689 (Avg Bid)
    €4689 Μέση Προσφορά
    13 προσφορές

    Looking for someone with experience building casinos. I'm looking to build simple website with few games like slots and dice using Chainlink VRF I do have a frontend designer on hand, but if you have experience with the process from A-Z we can still talk. Solidity Knowledge and blockchain smart contract expirince is a must. Thank you Anton

    €2585 (Avg Bid)
    €2585 Μέση Προσφορά
    10 προσφορές
    Deploy Eth and BTC node and Connect them to my OpenDAX 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    hey guys, I want you to deploy an eth and a btc full node (mainnet) and connect my opendax 2.6.6 to it (this is already installed and running). Also connect opendax to binance or other pricefeed providers like coingeko etc to get price feed. Create pair and market. ETH/BTC, ETH/USDT, BTC/UTC must be tradable.

    €167 (Avg Bid)
    €167 Μέση Προσφορά
    15 προσφορές
    Subgraph api Endpoint 6 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    i need someone experienced in subgraph and graphQL, to query endpoints for market data of Uniswap, Sushiswap, Balancer. Making a query is pretty simple but we encountered some issues with data and timestamp to query 24h pairs volume and price.

    €169 (Avg Bid)
    €169 Μέση Προσφορά
    16 προσφορές

    Request details We need the help of someone who can make additional development to our existing web app project. We are building a blockchain explorer, and we want to add some additional features for one specific chain (It is a Cosmos-sdk based, EVM compatible chain.) Our backend is coded with Rust. The things to do are simply these: Decode Logs, Topics details in txs. Implement smart contract verification service. (like ) And publish the verified contracts (like in Mintscan example: ).

    €2941 (Avg Bid)
    €2941 Μέση Προσφορά
    19 προσφορές
    WordPress + Crypto export 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    You have to have an experience using bitcoin / tectonic / apecoin on Wordpress. Place some sentence that we can understand of your experience on it. Don't bid without your experience details.

    €174 - €522
    Σφραγισμένο
    €174 - €522
    53 προσφορές

    Looking For Blockchain and MongoDB Training. Note: This is onsite training in Hyderabad. Looking for a trainer based on the Hyderabad location. Urgent Requirement !!!! Number of Trainings: 2 Topics: 1. Blockchain 2. MongoDB Commercial: 25k/Each Training Training Start Date: 9th Feb 2023 Duration of the Training: 28 Hours Including Breaks Duration in Days: 5 Days Location: Aziznagar, Hyderabad Experience: 2+ Years Interested trainers/Freelancers can share your CV/Profile with me.

    €11 / hr (Avg Bid)
    €11 / hr Μέση Προσφορά
    2 προσφορές

    I want to make swap and bridge(UI only, BSC to my blockchain) on my evm based blockchain, I have build the rpc url. Also I have deploy factory, muticall, wtoken, router contract on my evm blockchain, so all you do is make the frontend work, and change the theme/logo to our logo. and for the bridge, no need to real function, UI is OK.

    €653 (Avg Bid)
    €653 Μέση Προσφορά
    13 προσφορές

    Develop the telegram bot where user can put just basic details like name of the token, supply,buy/sell tax etc and it will deploy the smart contract on erc20/bep20 chains. for the reference checkout this bot: @tokerrdeployerbot

    €619 (Avg Bid)
    €619 Μέση Προσφορά
    10 προσφορές
    New Cryptocurrency Coin 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Minimum required to start a coin Be able to buy and sell it in a recommended marketplace (please recommend safest, cheapest, and your specialty) Possible integration so users can buy with the least amount of effort of setting up their own wallet outside the website (if legal or possible) Site will have the usual integrations to crypto-payment gateways in the Philippines Each user will have a profile and usual account information It must also track internal points system All transactions recorded and visible to admin Be able to classify transactions of various companies that purchase the crypto Please give quote at fixed rate. If per hour, please give projected number of hours based on above specs

    €830 (Avg Bid)
    €830 Μέση Προσφορά
    28 προσφορές
    Cryptocoin made available in Binance 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Need to start a new coin. pls advice on what marketplace best to offer it at. Guerilla budget for non-profit. I don't need an amount that will give me traction in reputation, what is the LEAST amount to be able to build this? Thanks in advance! Must be patient to answer my questions, as I am not a techie. Must specialize in blockchain. NDA upon further details.

    €768 (Avg Bid)
    €768 Μέση Προσφορά
    26 προσφορές
    COINVYAPPAR 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I want to create a block chain based platform , currency exchange , like coin dcx , WazirX, buyucoin

    €1334 (Avg Bid)
    €1334 Μέση Προσφορά
    17 προσφορές
    Design Website Ui UX -- 2 5 μέρες left

    Hello I need Frontend of website with atleast 17 sections It is related to crypto Bot Website If you experience in ICO, Crypto UI Development Please bid on the project.

    €186 (Avg Bid)
    €186 Μέση Προσφορά
    37 προσφορές
    Blockchain social media 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need a team of developers to help with the following concept built into an app. Time Village could be a thriving and diverse community where people from all over the world can connect and share their experiences, skills, and knowledge with one another. The platform could leverage blockchain technology to provide a secure and transparent environment where people can trade time and resources with each other. Users could access a variety of services and products, such as virtual education classes, counseling sessions, consulting services, and more. They could also earn and spend tokens,(earned through the creation of content and its trending performance) which could be used to purchase services or traded for other cryptocurrencies. (A token on an existing chain, not on its own.) The platf...

    €2740 (Avg Bid)
    €2740 Μέση Προσφορά
    40 προσφορές
    I need you to create a Transfer API for my Crypto 5 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    I need you to keep transfering crypto from my metamask address to different wallets at specific times.

    €365 (Avg Bid)
    €365 Μέση Προσφορά
    5 προσφορές
    NFT smart contract and web page on new blockchain 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    This will be a two-part project. Each part will have milestones. Part 1 is to create and publish a very generic landing page - nothing but a mint button. Load some generic images and simple generic metadata to IPFS. Create a very simple minting contract on the new , using their lrc20 USDL token. If we can get an nft to mint to their Chrome wallet extension, we'll move to the next part. Part 2 is to convert the landing page based on my graphics and layout. Connect to my nfts and metadata stored on IPFS. Convert the smart contract to a more comprehensive version, including mating and growth, and deploy the entire project live to public. LGCY blockchain is a Tron fork. Very similar to writing for ETH, but you will need to learn the differences. I can provide links to the gitbo...

    €1451 (Avg Bid)
    €1451 Μέση Προσφορά
    34 προσφορές
    Looking to hire expert blockchain developer 4 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Looking to hire blockchain developer who can work on project which needed to complete soon.

    €233 - €699
    Σφραγισμένο
    €233 - €699
    32 προσφορές

    There is a session to Binance futures volume alerts api, I want high buy and sell transactions as api with special calculation. As an example I leave a screenshot 1-all coins in binance futures signal time : shows when the buy and sell action came count : Shows how many times a signal is received from the same coin symbol : coin name last price : current price percent : % size and impact of incoming purchases and sales 24h change : Represents 24-hour change total : The numerical size of the purchase and sale made expresses how many units are bought and sold. signal : Indicates whether the signal is long or short. long if buy, short if sell example: bitcoin 24 hour volume : $16,420,024,252 We want to see purchases and sales above 0.20% of this volume (buy or...

    €615 (Avg Bid)
    €615 Μέση Προσφορά
    24 προσφορές
    Create a Samrt Contract on the BSC/ETH - 05/02/2023 11:05 EST 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Dohrnii aims to make financial knowledge accessible to all and to make the process of acquiring this knowledge more exciting, easier, and less complicated. Dohrnii stands for a vision where financial knowledge is easy to understand and accessible to everyone. The PDF document lists the steps exactly. We need someone to create a snapshot for us on the Vechain Blockchain and the Binance Smart Chain, and then transfer the tokens on the respective Cains to a new Binance Smart Chain. We also need someone to create a new smart contract with the functions: The liquidity pool profits from the token through buying and selling. As a percentage of 1-5% of the buy and sell price flows into the pool. This leads to constant growth in the pool, which stabilizes the price and reduces the risk of arbi...

    €34 / hr (Avg Bid)
    ΣΜΓ
    €34 / hr Μέση Προσφορά
    35 προσφορές
    Blockchain And AI Report 3 μέρες left

    Need a thesis on block chain technology and AI. Documentation of 40-50pages, Explaining about the sailent benifits that how block chain helps AI and AI helps Blockchain technology with block diagrams, Graphs, insights and mathematics with formulaes and derivations with unique representation of explinations and descriptions. Plagarism check should get passed

    €99 (Avg Bid)
    €99 Μέση Προσφορά
    31 προσφορές
    Create a Smart Contract on the BSC/ETH Chain 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Dohrnii aims to make financial knowledge accessible to all and to make the process of acquiring this knowledge more exciting, easier, and less complicated. Dohrnii stands for a vision where financial knowledge is easy to understand and accessible to everyone. The PDF document lists the steps exactly. We need someone to create a snapshot for us on the Vechain Blockchain and the Binance Smart Chain, and then transfer the tokens on the respective Cains to a new Binance Smart Chain. We also need someone to create a new smart contract with the functions: The liquidity pool profits from the token through buying and selling. As a percentage of 1-5% of the buy and sell price flows into the pool. This leads to constant growth in the pool, which stabilizes the price and reduces the risk of arbitr...

    €2803 (Avg Bid)
    ΣΜΓ
    €2803 Μέση Προσφορά
    36 προσφορές
    send flasing crypto 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    Hello we need to send flashing BTC or another crypto which stay 180 days on network.

    €151 (Avg Bid)
    €151 Μέση Προσφορά
    10 προσφορές

    Hello pancakeswap with all features to "shillswap" on secret network. 1 Deploy on secret testnet. Make revisions for UI at that time as well as walk through all contracts with me 2 Make all revisions and deploy on secret mainnet. Work with our dev team in discord to ensure no issues. Use similar color design from shillables.com.

    €690 (Avg Bid)
    €690 Μέση Προσφορά
    29 προσφορές
    Customize mobile app 3 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

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

    €505 (Avg Bid)
    €505 Μέση Προσφορά
    57 προσφορές

    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...

    €1268 (Avg Bid)
    €1268 Μέση Προσφορά
    66 προσφορές
    Looking for Cryptocurrency Development -- 3 2 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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.

    €1409 (Avg Bid)
    €1409 Μέση Προσφορά
    25 προσφορές
    Looking for Cryptocurrency Development -- 2 2 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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.

    €1288 (Avg Bid)
    €1288 Μέση Προσφορά
    12 προσφορές
    Btc cloud mining app for smartphone 2 μέρες left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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

    €1148 (Avg Bid)
    €1148 Μέση Προσφορά
    20 προσφορές
    Crypto Exchange 2 μέρες left

    I just wanted to develop crypto exchange for me.

    €3760 (Avg Bid)
    €3760 Μέση Προσφορά
    20 προσφορές

    Job Description: BLOCKCHAIN BITCOIN FLASHING SOFTWARE I am looking for a developer who can develop the BITCOIN, Flashing Software in main network (windows based), the requirements are mentioned below, 1) The software can perform flash of the BTC , as well as the flashed BTC should be transferable from one wallet to 5 wallets and with confirmation is appreciated. since it is flash btc it must be visible in BTC wallet address for 60 days. There will be no transaction fee while sending from "flash s/w" to "btc wallet" as it will be no confirmations. eg:- If we send from bitcoin flashing s/w to 1 wallet, it must support sending btc to 5 wallets also no problem must arise. It will be displayed till 60 days note:- Screen will have a picklist(btc) to select , "addr...

    €1439 (Avg Bid)
    €1439 Μέση Προσφορά
    12 προσφορές

    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.

    €799 (Avg Bid)
    €799 Μέση Προσφορά
    9 προσφορές

    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

    €1274 (Avg Bid)
    €1274 Μέση Προσφορά
    37 προσφορές
    Exhcange crypto & Tradeing 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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

    €1829 (Avg Bid)
    €1829 Μέση Προσφορά
    39 προσφορές
    Build a poker website for Crypto 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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.

    €723 (Avg Bid)
    €723 Μέση Προσφορά
    66 προσφορές
    New features for the metaverse. 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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

    €233 - €699
    Σφραγισμένο
    €233 - €699
    27 προσφορές
    Need to built smart contract with Dapp 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

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

    €715 (Avg Bid)
    €715 Μέση Προσφορά
    21 προσφορές
    Build me a arbitrage bot for solana ecosystem. 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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

    €529 (Avg Bid)
    €529 Μέση Προσφορά
    16 προσφορές
    Block chain analysis 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

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

    €242 (Avg Bid)
    €242 Μέση Προσφορά
    21 προσφορές
    Update React based chrome extension 1 μέρα left
    ΕΠΙΒΕΒΑΙΩΜΕΝΟ

    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

    €109 (Avg Bid)
    €109 Μέση Προσφορά
    9 προσφορές

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