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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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    88 trabajados encontrados, precios en USD

    Buenas, queremos crear una sociedad en España, dedicada a la tokenización y fraccionamiento de propiedades, servicios vacacionales y equipamientos deportivos. Necesitamos crear y lanzar nuestro token en una ICO, como utility token para obtener la financiación inicial y posteriormente elaborar y comercializar NFTs que ayuden al desarrollo de cada uno de los proyectos. Nos gustaría poder contar con sus servicios, ya que necesitamos una estructura sólida y confiable, desarrollada por expertos en la formar un equipo de trabajo blockchain que trabaje junto con la dirección de sistemas. Quedamos atentos a cualquier comentario así como a establecer una reunión online en la aclarar los diferentes puntos. Saludos cordiales, English: H...

    $2969 (Avg Bid)
    Acuerdo de Confidencialidad
    $2969 Oferta promedio
    72 ofertas

    Programador que ayude a solventar temas de vulnerabilidades web en nuestros sistemas de blockchain.

    $277 (Avg Bid)
    $277 Oferta promedio
    13 ofertas

    Hola, Necesito desarrollar una aplicacion hibrida android/ios. La aplicacion se podria decir que sería practicamente un clon de Paypal. La aplicacion tambien tendra integrada una billetera para criptomonedas con la funcion de poder enviar y recibir criptomonedas. Agradesco ofertas y propuestas

    $240 (Avg Bid)
    $240 Oferta promedio
    18 ofertas
    Opensea Collection Bid 6 días left
    VERIFICADO

    Hello I would like someone to assist me in create a node js application to make collection bids in Opensea The function will take , the collection slug , price and duration as inputs and successfully make the offer. The perferred way is through the RPC node direcly rather than through the seaport API. To be successful for this job please reply answer these you questions: 1. Can you successfully make a collection bid? 2. Will you do it through the RPC node or Seaport API? thank you

    $503 (Avg Bid)
    $503 Oferta promedio
    9 ofertas

    I need frontend developer for my page. But i don't have design, only idea. So you have to understand me with little words and make one i want. It is related blockchain, so blockchain knowledge is plus. Please share live url you have done.

    $506 (Avg Bid)
    $506 Oferta promedio
    78 ofertas

    I need to fetch data from a token from Stellar Blockchain and when the data was fetched, it needs to be filtered and after with the filtered data, it needs to submit a transaction. I need this to be all automated with my configuration and just start it and runs for 24/7 without stop. I ll give more details in private.

    $165 (Avg Bid)
    $165 Oferta promedio
    39 ofertas
    NFT project 6 días left
    VERIFICADO

    Done with designed the nft need help with technical issues

    $31 / hr (Avg Bid)
    $31 / hr Oferta promedio
    74 ofertas
    NFT Creation Designer 6 días left
    VERIFICADO

    We need NFT Creation Developer, Sk!P3 dvskha

    $105 (Avg Bid)
    $105 Oferta promedio
    17 ofertas
    Smart Contract Code Audit 6 días left
    VERIFICADO

    Looking to bring someone to do quick smart contract code audit and fill out a form with the results. Code audits should take 30 minutes to an hour and we're looking at doing about 20 audits a month. Must be familiar with Smart Contracts and the following attributes: Contract Ownership Airdrops and Backdoors Libraries and Forks Multi-Sig implementations Tokenomics

    $20 / hr (Avg Bid)
    $20 / hr Oferta promedio
    39 ofertas

    I want to trade by TP-SL mode in Phemex (crypto exchange like binance or bitmex). But I don't want to pay taker fee for trading fee. When I set order-price, order-money, TP price, SL price, then trading bot should find prices (near the prices I set before) that can be considered as maker position. In Phemex, when trading as maker position, then they give traders maker-rebate, and traders don't have to pay taker fee. I'm finding trading expert who has a lot of experiences for maker position trading. So I don't want experts who don't know about maker or taker concept.

    $613 (Avg Bid)
    $613 Oferta promedio
    18 ofertas
    Trading website 5 horas left
    VERIFICADO

    We are looking for a freelancer who can build a complete new platform for us which allows my customer to buy and sell trading stocks and cryptocurrency. The end user would like to specify which stocks need to be followed and then it needs to import history trends/information as well that my end user should be able to specify potential trends. He should be able to say that the program should automatically buy stock when it reaches a specific percentage or amount as well that he should be able to say to the program that it should automatically sell stock if it reaches a certain amount/percentage. It should automatically work. The program should be reachable on the internet but with high security constraints.

    $9671 (Avg Bid)
    Urgente Acuerdo de Confidencialidad
    $9671 Oferta promedio
    58 ofertas

    I am looking for a blockchain developer for my NFT project. It is start. In the future, I will make you busy.

    $952 (Avg Bid)
    $952 Oferta promedio
    26 ofertas
    Need some one who works on NFT 6 días left
    VERIFICADO

    I am looking for someone who can work on NFT and related services

    $548 (Avg Bid)
    $548 Oferta promedio
    22 ofertas

    Need code on how to mine monero on AWS, something similar to this:

    $164 (Avg Bid)
    $164 Oferta promedio
    15 ofertas

    Hi We need an Blockchain expert to help us make our game compatible for web3.O and add few NFT elements.

    $35 / hr (Avg Bid)
    $35 / hr Oferta promedio
    36 ofertas

    I need talent bridge & mulitsignature expert in blockchain side.

    $771 (Avg Bid)
    $771 Oferta promedio
    29 ofertas
    Nha Coin usdt -- 2 5 días left
    VERIFICADO

    Hi I need only person who use nha coin wallet because need help to withdraw. if anyone use please send us a message only NHA COIN Deposit is working fine but withdraw is only show to audit can anybody explain what happen or complete this project successfully.

    $412 (Avg Bid)
    $412 Oferta promedio
    4 ofertas

    The pool already running and config as PROP Auto generator now: FPPS or PPS+ auto generator payments method configure and setup If you have done it before please massage me and we talk about it. Requirement: ****Experience Done it before - Must be Expert in YIIMP mining pool.**** Please Don't Bid if you had no experience in YIIMP. ***Enable to start project in12hour. **** No milestone **** Full Payment after checking project. ****Max budget : 80$**** Auto bot BID & Higher BID will be removed.

    $77 (Avg Bid)
    $77 Oferta promedio
    7 ofertas

    Building a test network to run various application in hyperledger environment. Will need a technician to manage and administer this on a monthly base.

    $150 (Avg Bid)
    $150 Oferta promedio
    13 ofertas

    Hi i want to make an crypto wallet exchange and a crypto coin so i need a good team or individual who can handle the work

    $2140 (Avg Bid)
    $2140 Oferta promedio
    21 ofertas
    Nha Coin usdt 5 días left
    VERIFICADO

    Hi I need only person who use nha coin wallet because need help to withdraw. if anyone use please send us a message only NHA COIN Deposit is working fine but withdraw is only show to audit can anybody explain what happen or complete this project successfully.

    $433 (Avg Bid)
    $433 Oferta promedio
    6 ofertas
    NFT developer 5 días left
    VERIFICADO

    Looking for NFT developer for my website

    $1498 (Avg Bid)
    $1498 Oferta promedio
    47 ofertas

    Context: 1)I have 10,000 NFT Images already created 2)I have 10,000 Metadata files already created What i need: 1)I need someone to create a minting DApp for a website which is compatiable with opensea 2)The smart ethereum contract will need to split 25% and 75% of the intial sale price between two wallets and also split any future royalties between two wallets 50/50. You will need to help guide me through the launch process that you think will be good and must have worked on this type of project before and also happy to help with future development requirements. At the moment all i am after is bids so i can see how much it will cost, please confirm by saying "i understand".

    $618 (Avg Bid)
    $618 Oferta promedio
    77 ofertas
    Building a Web3.0 Platform 5 días left
    VERIFICADO

    Need solidity smart contracts written. Need a web3.0 connection to wallet connect, metamask and other wallets. Need website to allow escrow. Will say more after non-disclosure

    $2210 (Avg Bid)
    $2210 Oferta promedio
    76 ofertas

    I wonder if you can develop a web platform with the following requirements: The website (platform) should be developed to AUTOMATICALLY RUN and sell the Proof of Priority registration services by making the registrations on blockchain. It will work as follows in the user's view: 1- The user makes the registration on the Site - click on the "Register" menu. 2- When accessing the platform (site) again, access through the login menu. 3- The user makes the purchase of credits via PayPal (or credit card) required for registration. 4- Then informs the data of the record holder, type of record, title and description. 5- The platform AUTOMATICALLY checks if the user has enough credits for the service. 6- Then it releases the user to continue the service request. 7- The user selects ...

    $257 (Avg Bid)
    $257 Oferta promedio
    8 ofertas

    Need code on how to mine monero on AWS, something similar to this:

    $161 (Avg Bid)
    $161 Oferta promedio
    14 ofertas

    We need someone to help code some algos for our tradingview trading site. We need the algos to be able to use webhooks to trade from a user account. Please reply if you have worked on such projects.

    $533 (Avg Bid)
    $533 Oferta promedio
    30 ofertas

    Looking for Blockchain developer for NFT website. More details in chat

    $1746 (Avg Bid)
    $1746 Oferta promedio
    44 ofertas
    Trophy icon BSC 20 Payment 1 día left

    please go to - connect your metamask and check out the subscriptions that can be bought using the BSC20 Token $AET. There are 3 subscription levels, all three should be working and executable on Windows PC, Mac OS, iOs and Android always using Metamask plugin and/or Metamask App Browser (if mobile).

    $255 (Avg Bid)
    Garantizado
    $255
    4 participaciones
    Need Airdrop Telegram Bot 4 días left
    VERIFICADO

    FEATURES = Airdrop Task, Balance, Referral System, Withdraw Button, Bonus Button, Presale Button, Spreadsheet. Default airdrop bot steps: Bot sends all airdrop information Bots can send captchas image/math when users join Airdrop all tasklist Then the user presses the "Join Airdrop" button. Bot asks: User Must Join Telegram Channel & Group Bot sends all airdrop tasklist Bot ask submit your username BEP-20 crypto wallet address or other wallet address Bot ask did you completed all social media task Get referral links to invite users and get more rewards.

    $222 (Avg Bid)
    $222 Oferta promedio
    7 ofertas
    New NFT Game 4 días left

    I am going to make a fantastic NFT Game Website on my own. Actually looking for a developer who has experience in building NFT Games before. Here is a NFT game "Dragonary". My brother likes this game very much, but it is desktop app and it has got a problem in its logic. I'd like to have a wonderful game. Please send me your proposals if you are interested in my project. Do not waste my time. I hope to talk with only who has understood my project and got my game's general logic. Please write down your opinion about this game on your proposal or simply append the url or video of your similar project. Will share more details via chat and will start working immediately.

    $2210 (Avg Bid)
    $2210 Oferta promedio
    29 ofertas
    i would like a 9gag style page - 4 días left
    VERIFICADO

    i want someone to build a 9gag style page that will allow people to connect with a web3 wallet and post memes, upvote,downvote,comment and share their post and few more things .

    $209 (Avg Bid)
    $209 Oferta promedio
    42 ofertas
    Upload my NFT's on Opensea 4 días left
    VERIFICADO

    I have approx 5000 NFT which has 8 original images and 4672 Other Images. also, I already created metadata and uploaded it on Pinata Cloud. so just want an experienced blockchain developer who can create a smart contract and upload it ETH blockchain. where 8 original images will be always on top

    $27 (Avg Bid)
    $27 Oferta promedio
    10 ofertas
    Write SOLIDITY smart contract 3 días left
    VERIFICADO

    We want to copy existing project from github. Need to change few things from that contract.

    $88 (Avg Bid)
    $88 Oferta promedio
    14 ofertas
    Python ecosystem (crypto currency) 4 días left
    VERIFICADO

    We need professional solidity developers who work in our project , our project have to need new solidity developers for better chain and better utilities

    $7 (Avg Bid)
    $7 Oferta promedio
    1 ofertas

    Our team based in US are gonna add two Golang developers for some big project. Payment is on Hourly rate and it is $30~$45. Please apply to this job if you are affordable this rate and it is one year contract. Please attach your Resume with your experiences in Golang. Thank you.

    $38 / hr (Avg Bid)
    $38 / hr Oferta promedio
    28 ofertas

    I wonder if you can develop a web platform with the following requirements: The website (platform) should be developed to AUTOMATICALLY RUN and sell the Proof of Priority registration services by making the registrations on blockchain. It will work as follows in the user's view: 1- The user makes the registration on the Site - click on the "Register" menu. 2- When accessing the platform (site) again, access through the login menu. 3- The user makes the purchase of credits via PayPal (or credit card) required for registration. 4- Then informs the data of the record holder, type of record, title and description. 5- The platform AUTOMATICALLY checks if the user has enough credits for the service. 6- Then it releases the user to continue the service request. 7- The user selects ...

    $910 (Avg Bid)
    $910 Oferta promedio
    45 ofertas
    simple dApp for Algo? 3 días left
    VERIFICADO

    We need to build a dApp that will let us (or an authorized user) select items to lock up for another person to be able to come claim. Should be able to select an available ASA token or ASA NFT and lock it for another user by either wallet address OR if a wallet holds a certain ASA (NFT) (assign X asa to X wallet address, OR assign X ASA to holder of X ASA) User that locks the items should be able to see when claimed and by what wallet, or be able to cancel at anytime (in case of error or limited time offer) it's should stay locked to claim until claimed or canceled by the person that locked it User would come to app, connect wallet and see if they are holding anything they would get a reward for, and if so, then they could claim it by signing contracts and having item opted in an...

    $323 (Avg Bid)
    $323 Oferta promedio
    31 ofertas
    Roulette Game(Solidity SC) 3 días left
    VERIFICADO

    Hello, We need a roulette game with excellent graphics, in solidity, with smart contract. Mobile based or responsive. Best Regard's VG

    $2056 (Avg Bid)
    $2056 Oferta promedio
    19 ofertas
    Crear token ERC-20 -- 2 3 días left
    VERIFICADO

    Busco experto en blockchain que me ayude a crear smart contract y token ERC-20 en Etherum.

    $163 (Avg Bid)
    $163 Oferta promedio
    58 ofertas

    We require a smart contract developer for a BEP-20 with integrations to service modules from ChainLink. The project is expected to last for 3-4 weeks. Flat-rate payment, future employment opportunities available.

    $41 / hr (Avg Bid)
    $41 / hr Oferta promedio
    30 ofertas

    There is a requirement for the rfollowing: #1 Create NFT + Gift Cards with Utility #2 Launch limited edition NFTs to drive Referrals through the provision of incentives Please provide the following info with your bid. - How you would implement the above - Timelines/milestones Further information can be provided as required

    $872 (Avg Bid)
    $872 Oferta promedio
    37 ofertas

    I am looking for an experienced developer who can work on the Solidity, Blockchain, and another buy/sell features using the API. Implement Buy, Sell (redeem) functionality to Dapp crypto Implement Buy, Sell Crypto with Fiat Infura The Infura API suite provides instant access over HTTPS and WebSockets to the Ethereum network. IP Blocking Restricted

    $100 / hr (Avg Bid)
    $100 / hr Oferta promedio
    54 ofertas

    I need metamask connection with front end development and smart contract on it What i need After metamask connection was done User must have my nft then my page will be unlocked I attached the files you can see what steps i need to follow

    $68 (Avg Bid)
    $68 Oferta promedio
    21 ofertas

    I'm in need of a cryptocurrencies professional

    $512 (Avg Bid)
    $512 Oferta promedio
    44 ofertas

    This project is based on Hyperledger fabric and NFT tokens . Check the below attached files for Abstract and detailed description .

    $100 (Avg Bid)
    $100 Oferta promedio
    9 ofertas

    solidity ^0.8.11 ERC721EnumerableUpgradeable ECDSAUpgradeable EIP712Upgradeable AccessControlEnumerableUpgradeable ReentrancyGuardUpgradeable StringsUpgradeable MulticallUpgradeable IERC2981Upgradeable Please only apply if you know what the above words mean and you know how to work with them and you are available!

    $27 / hr (Avg Bid)
    $27 / hr Oferta promedio
    54 ofertas

    Need someone who can customize BSC GETH node for TX backrunning. Right now I am 1-20+ indexes behind target tx. Need 1-5 max. *possibly to buy also professional contract sniping bot, especially if coded on golang

    $190 (Avg Bid)
    $190 Oferta promedio
    9 ofertas

    Hi there, I need help creating a token on ICP, AVAX or one of the other blockchains that would allow for data migration, security, etc with low gas fees. Use the website and let me know if you’d be able to use any of their products on one of the blockchains with low gas fees. Need to create a token for a company that helps with data migration, data reconciliation and mata masking.

    $167 (Avg Bid)
    $167 Oferta promedio
    12 ofertas

    I have a task to manage security documents with blockchain sign technology from my boss. I need real experience with etherem and solana net developer with and solidity for a long time. Please show me your github projects to improve your skill. Prepend (I love blockchain) in headline of your bid. Thank you!

    $20 / hr (Avg Bid)
    $20 / hr Oferta promedio
    33 ofertas