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.

Conform celor 84,024 recenzii, clienții îi evaluează pe Blockchain Developers cu 4.79 din 5 stele.
Angajează Blockchain Developers

Filtrare

Căutările mele recente
Filtrează în funcție de:
Buget
la
la
la
Tip
Aptitudini
Limbi
    Starea proiectului
    60 proiecte găsite, la prețul de USD
    Ethereum Proxy Wallet 21 ore left
    VERIFICAT

    I am looking for an experienced Ethereum developer. What is needed is a proxy wallet. The issue is the following: We have NFTs in a wallet that allow access to certain websites. We want to allow this access to multiple people, however this is not possible with the normal Ethereum wallet as someone who has access to this wallet can transfer the NFTs inside. To prevent this we need a proxy wallet, this should be designed so that we can give someone the private key, but they have no way to transfer the NFTs, but they still get access to the websites as if the NFT was in the wallet they log in with. These types of wallets are also often used for community to give access to their members, but still ensure that the NFTS are not transferred. I know of a smart contract that offers this exact fea...

    $678 (Avg Bid)
    Recomandat Urgent
    $678 Oferta medie
    13 oferte

    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.

    $13 / hr (Avg Bid)
    $13 / hr Oferta medie
    15 oferte
    Build a WAX blockchain NFT game 6 zile left
    VERIFICAT

    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.

    $956 (Avg Bid)
    $956 Oferta medie
    27 oferte

    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

    $1168 (Avg Bid)
    $1168 Oferta medie
    43 oferte

    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 Oferta medie
    33 oferte
    Blockchain Cardano Devloper 6 zile left
    VERIFICAT

    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...

    $1919 (Avg Bid)
    $1919 Oferta medie
    21 oferte

    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.

    $167 (Avg Bid)
    $167 Oferta medie
    4 oferte

    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 Oferta medie
    5 oferte
    Opensea NFT collection 6 zile left
    VERIFICAT

    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 …..

    $91 (Avg Bid)
    $91 Oferta medie
    25 oferte

    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.

    $1902 (Avg Bid)
    $1902 Oferta medie
    35 oferte

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

    $5 / hr (Avg Bid)
    $5 / hr Oferta medie
    4 oferte

    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...

    $1159 (Avg Bid)
    $1159 Oferta medie
    30 oferte
    Custom Blockcert 5 zile left

    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

    $795 (Avg Bid)
    $795 Oferta medie
    31 oferte
    Need ML Engineer 5 zile 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.

    $15320 (Avg Bid)
    $15320 Oferta medie
    18 oferte

    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 Oferta medie
    39 oferte
    Bybit API and Python -- 2 5 zile left
    VERIFICAT

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

    $30 / hr (Avg Bid)
    $30 / hr Oferta medie
    26 oferte

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

    $24 / hr (Avg Bid)
    $24 / hr Oferta medie
    25 oferte

    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

    $176 (Avg Bid)
    $176 Oferta medie
    11 oferte
    Mining Pool -- 2 5 zile left
    VERIFICAT

    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...

    $2405 (Avg Bid)
    $2405 Oferta medie
    65 oferte

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

    $171 (Avg Bid)
    $171 Oferta medie
    18 oferte

    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

    $10024 (Avg Bid)
    $10024 Oferta medie
    24 oferte

    Proyecto para el registro en blockchain privada de registros, certificados y contratos entre los usuarios del sistema

    $1225 (Avg Bid)
    $1225 Oferta medie
    26 oferte

    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.

    $230 (Avg Bid)
    $230 Oferta medie
    18 oferte
    DECRYPTING A SMART CONTRACT 4 zile left
    VERIFICAT

    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.

    $532 (Avg Bid)
    $532 Oferta medie
    32 oferte
    I need an Crypto Arbitrage Bot 4 zile left
    VERIFICAT

    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.

    $159 (Avg Bid)
    $159 Oferta medie
    20 oferte

    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. 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 hosted on my site, with user h...

    $1269 (Avg Bid)
    $1269 Oferta medie
    71 oferte

    We are researching the market for someone who can built us a review site similar to trustpilot. Not a copy but same complexity Must include all from building, design, operational smart contracts etc

    $8090 (Avg Bid)
    $8090 Oferta medie
    41 oferte

    I am looking for a colleague who can expertly manage multisig wallets built with the Clef tool on an Ethereum node. Note: Not multisigs created by contract. I'm talking about multisig wallets managed with Clef.

    $2151 (Avg Bid)
    $2151 Oferta medie
    31 oferte

    Hello Everybody, I am looking for a Dev who can make an arbitrage Bot to do arbitrage trades on multiple DEX platforms. 1. The Bot must be able to scan for opportunities and detect price differences between exchanges. 2. Once an opportunity is identified, the Bot must quickly execut trade. 3. The Bot must be able to determine the necessary amount and execut arbitrages with the appropriate gas fee to avoid being outrun by other bots. 4. The bot must be able to pay the gas fees and send the profits to the wallet address of the owner. 5. The Bot must also be able to utilize Flash Loans from AAVE and/or DYDX. I am waiting for your proposals. Thank you.

    $147 (Avg Bid)
    $147 Oferta medie
    21 oferte

    Summary of the algorithm for an Aave flash loan arbitrage bot: 1. Monitor the prices of the assets on different exchanges and identify any price differences that can be arbitraged. 2. Determine the flash loan amount depending upon the balance available. For e.g.:- the interest rate is on AAVE is .09% and the GAS Fees is .00025%, then for a balance available for $100. Then total loan amount one can borrow is $110,803.32 3. Take a flash loan from the Aave protocol for the amount needed to execute the arbitrage trade. 4. Calculate the profit of the arbitrage trade by comparing the prices of the assets on different exchanges. 5. Check the gas fees for the transaction. 6. Compare the profit, interest, and gas fees, and only execute the trade if the profit is greater than the interest and ...

    $12 (Avg Bid)
    $12 Oferta medie
    2 oferte
    Cryptocurrency 3 zile left

    I need someone expert on cryptocurrency and they do trades

    $170 (Avg Bid)
    $170 Oferta medie
    29 oferte

    Hello We are looking for senior solana NFT expert. NFT design is already ready. You need to check defi site and find out current issue. You must start right now. Thank you

    $1404 (Avg Bid)
    $1404 Oferta medie
    38 oferte

    we want an trading bot that will trade on decentralized pancake swap exchange. Please share your offers. will discuss through chat.

    $298 (Avg Bid)
    $298 Oferta medie
    14 oferte
    ROI DAPP Website build 2 zile left
    VERIFICAT

    Hi, freelancers, I am going to build ROI Dapp. Must know about all tokens, and coins so anybody can use this site. If you know blockchain and hosting, managing the server, contact me. Will start as soon as possible.

    $14 / hr (Avg Bid)
    $14 / hr Oferta medie
    52 oferte

    i want a sandwich bot for crypto along with the arbitrage bot as well and on bsc chain....if you already have one and need to prove if it profitable or not

    $773 (Avg Bid)
    $773 Oferta medie
    11 oferte

    I am interested to hear from Freelancers that have good experience in building these types of bots I have something in mind, but I am also interested to hear some feedback and advice I would prefer to speak with developers that are owner-operators of their own code, please I would like a bot that can copy trades from a Metamask/Hot wallet to interact with smart contracts on BSC and would be happy if it was capable of operating on multiple chains It would need to monitor the Mempool because it will be copying other bot accounts mostly, sniping would be another feature I would be interested in and also flash loan arbitrage bots

    $1896 (Avg Bid)
    $1896 Oferta medie
    41 oferte
    Build me a crypto wallet -- 4 2 zile left
    VERIFICAT

    We need a freelancer who can develop crypto wallet in IOS and Android with web. Bid cost will be the final no negotiation.

    $2642 (Avg Bid)
    $2642 Oferta medie
    26 oferte

    We have BNB liquid in code on the bnb chain. We are looking for a colleague who can transfer these liquids to our wallet in a usable form using the bsc bridge.

    $152 (Avg Bid)
    $152 Oferta medie
    7 oferte

    I have a blockchain project which we wish to kickstart the pre-sale, i need youtube and social media influencer mostly crypto influencer to help me make it go viral

    $18 / hr (Avg Bid)
    $18 / hr Oferta medie
    21 oferte

    Hola Necesito una persona con experiencia en contratos inteligentes para realizar un sistema de referidos como se muestra en el archivo adjunto. Si la persona cuenta con experiencia en uso de la herramienta low code sería mucho mejor. Saludos

    $492 (Avg Bid)
    $492 Oferta medie
    6 oferte

    Hello. Dear Freelancers. We are looking for a talented WebGL developer experienced in building interactive websites for crypto projects. Here are some examples of websites that we would like to replicate for our project: At the first of bid comment, could you type "THREEJS CRYTOCURRENCY"?

    $37 / hr (Avg Bid)
    $37 / hr Oferta medie
    30 oferte
    APTOS Blockchain Developer 1 zi left
    VERIFICAT

    We need somebody capable to code on MOVE language for APTOS/SUI blockchains. - NFT minting - Smart contracts - Marketplaces - Air-drops Please let us know if you have experience and let's get started immediately.

    $1020 (Avg Bid)
    $1020 Oferta medie
    30 oferte
    Deploy and Install Opendax 1 zi left
    VERIFICAT

    I want you to install opendax from their github run it successfully and make it ready to be used I want step by step video guide as to how to do it.

    $582 (Avg Bid)
    $582 Oferta medie
    35 oferte

    This project is about video chatting. If you have rich experience of , I will contact you.

    $22 / hr (Avg Bid)
    $22 / hr Oferta medie
    12 oferte

    ONLY DEVELOPERS WITH EXPERIENCE IN POLYGON BLOCKCHAIN. CONNECT POLYGON TO EXISTING REACT NODE EXISTING PROJECT

    $13 / hr (Avg Bid)
    $13 / hr Oferta medie
    26 oferte
    C++ Software developer 17 ore left
    VERIFICAT

    Looking for C++ Software developer with Docker, Blockchain, NFT Need to start work asap. Please apply only individual developers, no agency.

    $17 / hr (Avg Bid)
    $17 / hr Oferta medie
    28 oferte

    is looking for a remote, React Developer for developing and maintaining our FE components with the following skills 5+ years of experience in development. Payment starts at USD 4'500 a month. Position is long term. We prefer free-lance developers over agency developers. ************************************ NOTE! The following test will be required from candidates. *********************************** Must have - Developing applications in React including component design and state management for specific use cases - Ability to style and construct exact UI components from UI specifications (mockups). - Solid knowledge of Web Sockets, and Web workers - Good understanding of git and related tools - Ability to work with the Swedish time zone (GMT +1) - Above-average spoke/written ...

    $33 / hr (Avg Bid)
    $33 / hr Oferta medie
    82 oferte

    Articole recomandate doar pentru tine

    If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
    11 MIN READ
    Python runs some of the biggest websites on the net. Here’s how to create a website using Python, one of the easiest programming languages around.
    8 MIN READ
    You can build a stunning website on the Wordpress platform. Here is a collection of 10 sensational Wordpress designs to ignite your creativity.
    7 MIN READ