Cadena de bloques 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.

Contratar a Blockchain Developers

Filtro

Mis búsquedas recientes
Filtrar por:
Presupuesto
a
a
a
Tipo
Habilidades
Idiomas
    Estado del trabajo
    74 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...

    $2871 (Avg Bid)
    Acuerdo de Confidencialidad
    $2871 Oferta promedio
    72 ofertas

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

    $284 (Avg Bid)
    $284 Oferta promedio
    12 ofertas

    Hi, I am looking for a Blockchain / solidity developer to Create a Bot to execute Flash loan operations. Looking for a long-term working relationship. Regards

    $15 / hr (Avg Bid)
    $15 / hr Oferta promedio
    17 ofertas

    Create a copy of the Brave browser but with my no-custodial wallet and my coin

    $1135 (Avg Bid)
    $1135 Oferta promedio
    17 ofertas

    I am looking for a blockchain developer who can code smart contracts, web3 ability and is able to create valid APIs

    $114 (Avg Bid)
    $114 Oferta promedio
    43 ofertas

    I am interested in developing a project( real estate ) tokenization platform and decentralized, send me a message if you have experience and can handle the smart contract.

    $1166 (Avg Bid)
    $1166 Oferta promedio
    56 ofertas

    Solutions to some significant challenges of payment transactions for electric batteries, charging points queuing, and charging process;

    $181 (Avg Bid)
    $181 Oferta promedio
    17 ofertas

    The project is to build a simple betting website in which users can register with their MetaMask wallet and bet on available sports events. After an event outcome is decided by admin, users who predicted the result correctly get rewards proportional to their betting amount and the house gets 5% of the total sum. -Events are created by admin. Each event has two competing teams each with its own photo. There can be 4 possible outcomes for each event (win, loss, draw, cancelled). - Each user can have simple profile (avatar and bio and showing his betting history) - User also have settings options to be notified about their betting outcomes and newly published bets. - Each event has a deadline to bet, amounts betted on each result and the list of participants on each event. Each event also ...

    $77 / hr (Avg Bid)
    $77 / hr Oferta promedio
    27 ofertas

    We have a ERC-20 based token, which needs a pre-launch audit. Scope of work - code accuracy - proof of stake readiness - code fulfills development requirements -correction of errors -confirm launch readiness We assume 2-3days work the max. Please share previous experience

    $2402 (Avg Bid)
    $2402 Oferta promedio
    18 ofertas

    A configured and functional blockchain infrastructure based on Hyper-ledger or ethereum , demonstrates the traceability of transactions and the conversion of points into a kind of currency that can be used within the platform. VM , code sources , documents....etc will be provided . i need an expert that can do that quick. ( two developers failed on this project for lack of competency, if you don't know anything about Blockchain ,there's no reason to contact or to accept this job) . Reach out to me if you have the necessary skills and please stop asking me to increase the budget !

    $226 (Avg Bid)
    $226 Oferta promedio
    28 ofertas

    We are providing a code signing service for various platforms. For macOS, we plan to provide a CryptoTokenKit provider that can be used by Xcode, Xcodebuild and codesign, and that talks to our backend service for actual signing operations. We also need an installer that does not require user interaction. We already provide a cross-platform C++ library that connects to the backend, which does the actual crypto operations. A few modifications might be necessary on our side. You will need basic applied cryptography knowledge. You must understand the concepts of code signing, certificate management, and smart card key access in macOS (although no physical smart cards will actually be used). You will contribute platform-specifc knowledge to a team of experienced software developers. P...

    $39 / hr (Avg Bid)
    Acuerdo de Confidencialidad
    $39 / hr Oferta promedio
    13 ofertas
    Build me decentralised platform 6 días left
    VERIFICADO

    We need a decentralised eSports platform combined with fantasy tournaments,only teams with good experience in blockchain technology may bid, companies near NCR region should bid

    $10694 (Avg Bid)
    $10694 Oferta promedio
    22 ofertas

    I want to create and deploy smart contract to ETH

    $503 (Avg Bid)
    $503 Oferta promedio
    48 ofertas
    Dynamic NFT with Chainlink Keeper 6 días left
    VERIFICADO

    Looking for a developer who is comfortable with Dynamic NFT development and able to integrate Chainlink Keeper for smart contract automation. Developer also needs to be skillful in frontend React development as user experience for the minting site is important. Required Skill: React, IPFS, Chainlink, NFT development

    $519 (Avg Bid)
    $519 Oferta promedio
    52 ofertas

    Major modification in the blockchain project is required, Demo must be given through Anydesk, UI must be developed representing charts. Maximum time duration is 7 days. Only committed personnals contact me. Make sure ur freelancer account is valid. The only payment method would be through freelancer account.

    $553 (Avg Bid)
    $553 Oferta promedio
    33 ofertas
    ERC-20 token code audit 6 días left
    VERIFICADO

    We have a ERC-20 based token, which needs a pre-launch audit. Scope of work - code accuracy - proof of stake readiness - code fulfills development requirements -correction of errors -confirm launch readiness We assume 2-3days work the max. Please share previous experience

    $315 (Avg Bid)
    $315 Oferta promedio
    32 ofertas

    I want a blockchain expert who is very good at olympus dao platform. I need some smart contract changes and current frontend integration. Please apply if you are a good fit for this project. Thanks

    $1013 (Avg Bid)
    $1013 Oferta promedio
    22 ofertas
    Long Term NFT Minting Project 5 días left
    VERIFICADO

    Requires a specialist who is able to develop a token and a smart contract. We need a specialist for not just one project, we launch about 10 projects a month and we need a specialist for each of them, if we can work with you, we would be glad to have a long-term cooperation. Now we are ready to discuss this project and start working. Firstly this role will require paid test and it would be simple smart contract. Please see attachment file and bid with your creative answers. I will hire 2 candidates with right understanding. Please start your bid with "contract expert" Thanks.

    $25 - $50 / hr
    Sellado
    $25 - $50 / hr
    60 ofertas
    Rust Expert Needed 5 días left
    VERIFICADO

    Seeking RUST developer to fix error of exciting staking project! Security-orientated team. Pentesting skills would benefit the project as a whole but not nececary. Strong RUST development skill required.

    $19 - $38 / hr
    Sellado
    $19 - $38 / hr
    39 ofertas

    DO NOT BID UNLESS YOU ARE A SOLIDITY DEVELOPER FROM IASI, ROMANIA OTHERWISE I WILL REPORT YOU. Salutare. Caut un developer in Solidity care poate face un token custom si care sa fie dispus sa ne intalnim fata in fata pentru a discuta detalii despre proiect.

    $499 (Avg Bid)
    $499 Oferta promedio
    24 ofertas
    Smart Contract Code Reviews 5 días left
    VERIFICADO

    Looking to bring someone to do quick smart contract code reviews and fill out a form with the results. Code reviews will take 30 minutes to an hour and we're looking at about 20 reviews a month.

    $437 (Avg Bid)
    $437 Oferta promedio
    105 ofertas

    Its for an NFT related coding for a new website. Smart contract process api with a nft market, blockchain api coding, payment gateway with crypto

    $897 (Avg Bid)
    $897 Oferta promedio
    63 ofertas

    Hello, i need a site with a like. The system should be able to work manually and automatically Where can we connect api for Kyc and Aml He will be able to attract prices through a site that we will provide. For the following period, money and coin options will be added I want to build a site with a fairly high level of security for the user and the company. Merhaba, benzeyen bir siteye ihtiyacım var. Sistem manuel ve otomatik olarak çalışabilmeli Kyc ve Aml için api bağlayabileceğimiz Bizim vereceğimiz bir site üzerinden fiyat çekebilecek. İlerleyen dönem için, para ve coin seçeneği eklenebilecek Kullanıcı ve firma için güvenliği oldukça yüksek bir site yaptırmak istiyorum.

    $1548 (Avg Bid)
    $1548 Oferta promedio
    37 ofertas

    Develop BEP20 token smart contract with taxes and upgradable. Requirements> Share your portfolio in comment bscscan and similiar >In supply : 1b >Total tax: >>Development wallet: 4% >>Marketing wallet: 4% >>Reward wallet: 2% >>Trezor wallet: 2% Participate: >>send smart contract to test >>>1st payment >>after its deployed on mainet New tasks >>> develop dapp with other team members >>>>2nd payment - per hour or per project

    $161 (Avg Bid)
    $161 Oferta promedio
    37 ofertas
    Blockchain Expert Needed 5 días left
    VERIFICADO

    Hi I need a Blockchain expert who is well versed in the mempool and transactions within the mempool. The selected freelancer should have excellent working knowledge of how transactions are mined by miners on the BSC network and how mining algorithms work. Your main task is helping me to understand how transactions are placed in the block and how I maximise my chances of selling success. This is a simple job for someone that is an expert in this field.

    $202 (Avg Bid)
    $202 Oferta promedio
    51 ofertas

    ** NOTE: Please only bid if you have read through the job ad and understand what needs to be done, failure to understand upon reading the job ad your bid will be rejected ** I am looking for someone to develop NFT Generator Web App where users can add layers and upload traits which will then generate NFT's with Metadata (Ethereum, Polygon, and Solana) in JSON files. A quick overview of how the web application will work: • Users will add layers of the NFT’s they are looking to generate, e.g. background, head, eyes, nose, mouth. • Users would then upload the traits (image files) of each type of layers, e.g. 4 different backgrounds, 4 types of heads, 6 types of eyes, 2 types of noses, and 4 types of mouths. • Once traits are added under each layer, the appli...

    $3975 (Avg Bid)
    $3975 Oferta promedio
    50 ofertas

    Hello. Our team is currently looking for the right person to our next big project. We are looking for someone capable of creating a CS:GO Skin / Crypto Casino for us. We're also going to need a fulltime web developer for our project, so this won't be a one time job, it's a full time job that pays well. Together with my business partners, we're aiming for a completely new industry - Online Gambling. All of us have a fair bit of experience in the field overall and we hope that you do aswell. What we need: - A fully functional CS:GO / Crypto Casino - Functional Deposits & Withdrawals - Games such as roulette & crash - And much more Good examples would be and www.csgoroll.com. Please feel free and have a good indepth look of the quoted sites and fu...

    $9264 (Avg Bid)
    $9264 Oferta promedio
    30 ofertas
    Smart Contract Deployed on Remix 5 días left
    VERIFICADO

    I need a smart contract deployed on remix that allows me to send coins to a personal address

    $456 (Avg Bid)
    $456 Oferta promedio
    68 ofertas

    Hi there I am looking for someone full time to join our team to help in our discord your role will vary depending on your knowledge please let me know your answers between 1-10 Tennis Knowledge - 1/10 - NFT knowledge - 1/10 Discord - 1/10 to the area you are most confident please tell me your experience please be honest depending on your answer we will give you a certain role $3 per hour (non negotiable) this is the discord - please message Sabrina in it to make you admin if you want to join payments will be ONCE A WEEK ON FREELANCER (I can't do it daily as I have a team of over 50 so PLEASE dont ask for it daily) THANKS KYLE

    $3 / hr (Avg Bid)
    $3 / hr Oferta promedio
    13 ofertas
    Opensea Collection Bid 5 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

    $342 (Avg Bid)
    $342 Oferta promedio
    16 ofertas
    NFT project 4 días left
    VERIFICADO

    Done with designed the nft need help with technical issues

    $30 / hr (Avg Bid)
    $30 / hr Oferta promedio
    80 ofertas
    NFT Creation Designer 4 días left
    VERIFICADO

    We need NFT Creation Developer, Sk!P3 dvskha

    $103 (Avg Bid)
    $103 Oferta promedio
    19 ofertas
    Smart Contract Code Audit 4 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

    $21 / hr (Avg Bid)
    $21 / hr Oferta promedio
    42 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.

    $620 (Avg Bid)
    $620 Oferta promedio
    19 ofertas

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

    $1049 (Avg Bid)
    $1049 Oferta promedio
    37 ofertas
    Need some one who works on NFT 4 días left
    VERIFICADO

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

    $575 (Avg Bid)
    $575 Oferta promedio
    23 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.

    $34 / hr (Avg Bid)
    $34 / hr Oferta promedio
    40 ofertas

    I need talent bridge & mulitsignature expert in blockchain side.

    $796 (Avg Bid)
    $796 Oferta promedio
    29 ofertas
    Nha Coin usdt -- 2 3 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
    14 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 3 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 3 días left
    VERIFICADO

    Looking for NFT developer for my website

    $1518 (Avg Bid)
    $1518 Oferta promedio
    50 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".

    $628 (Avg Bid)
    $628 Oferta promedio
    81 ofertas
    Building a Web3.0 Platform 3 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

    $2235 (Avg Bid)
    $2235 Oferta promedio
    81 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:

    $160 (Avg Bid)
    $160 Oferta promedio
    15 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.

    $539 (Avg Bid)
    $539 Oferta promedio
    31 ofertas