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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. Contratar a Blockchain Developers

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    50 trabajados encontrados, precios en USD

    I need a profitable forex trading signal

    $6191 (Avg Bid)
    $6191 Oferta Promedio
    11 ofertas

    I need a profitable Forex Trading Signal and How does it works

    $4003 (Avg Bid)
    $4003 Oferta Promedio
    9 ofertas

    Build a simple decentralized marketplace like OpenBazzar that enables the buying and selling of items using an ethereum token

    $1354 (Avg Bid)
    $1354 Oferta Promedio
    12 ofertas

    I just need a simple faucet with Steem coin integrated. I need exactly a website like this but with steem instead of doge. [iniciar sesión para ver URL]

    $185 (Avg Bid)
    $185 Oferta Promedio
    14 ofertas
    ASIC FPGA Firmware development 6 días left
    VERIFICADO

    We are looking for developers/coders specialized in cryptos and blockchain for a project of firmware development. We would like to get a firmware to overclock this mining hardware i.e. graphic cards (GPU) RX580 8Go. Which are the maximum hashrates performances you can get?

    $2425 (Avg Bid)
    $2425 Oferta Promedio
    1 ofertas

    this project combination between blockchain and c++ , if you are experts in both domain bid plz otherwise Not!

    $222 (Avg Bid)
    $222 Oferta Promedio
    21 ofertas

    Requirements: 1) Must have solid experience in web and software development especially C++(I DO NOT WANT PHP WORK.) 2) Must have a solid background in Security and Cyber Security. 3) Must know how to create full nodes for the coins and tokens listed and offer liquidity solutions. 4) This is only for experienced firms and long term work will be offered! Pay will be for this project and 4 months...

    $2624 (Avg Bid)
    $2624 Oferta Promedio
    30 ofertas

    Hi I need to be listed in 1 preferably 2 exchanges for my coin (not token) and would like to be listed in one from the list here: [iniciar sesión para ver URL] if possible and without listing fee. Can you help with this?

    $201 (Avg Bid)
    $201 Oferta Promedio
    8 ofertas

    SOFTWARE 1. Programming language : python / Java 2. Blockchain : etherium solidity 3. Interface : PhP framework 4. API : postman MODULE 1. User Authentication 2. Device Authentication 3. Evidence collection PAYMENT 1. Maximum : USD300 total project cost 2. Payment through freelancer / paypal 3. Payment schedule : USD 50 – flow chart and algorithm USD 100 – User Authentication US...

    $448 (Avg Bid)
    $448 Oferta Promedio
    12 ofertas

    My project will implement a simple supply chain management process with 3 parties (buyer, supplier, and bank. The contract will have a simple work order (amount and price/unit, total price and insurance binder for supplier) between buyer and supplier. The bank will be able to see the contract and insurance binder. Tasks are initiate work order + work complete.

    $273 (Avg Bid)
    $273 Oferta Promedio
    9 ofertas

    I want to create a one slide software architecture diagram for my block chain based digital certificate storage/ (technology stack)verification

    $14 / hr (Avg Bid)
    $14 / hr Oferta Promedio
    1 ofertas

    This project is only for senior experts who have proven experiences in Android&iOS wallet of several crypto assets. Need to provide several digital assets like BTC, ETH, Monero, USDT Send, Receive, Exchange between assets functions to be implemented Need import/export private key Backup wallet function need Hybrid is preferred Please describe about decentralize and centralize experiences about...

    $4337 (Avg Bid)
    $4337 Oferta Promedio
    42 ofertas

    !! READ the REQUIREMENTS before you knock !! 1. You are expected to have good knowledge on areas such as; blockchain attacks/crypto-threats/solidity/Smart-contract/Hash-Algorithms/51% attacks/Sybil attack/. 2. You will need to figure out a security issue in the blockchain network. We can help you with that. Some issues can be 51% attack, Sybil attack, BGP Hijacking, Eclipse attack, Smart Contr...

    $8 / hr (Avg Bid)
    $8 / hr Oferta Promedio
    7 ofertas

    I am looking for support in designing a peer to peer energy system that utilises blockchain and the lightning network. Needs to be scalable to 1 billion transactions per second. This is just a design and proof of concept

    $808 (Avg Bid)
    $808 Oferta Promedio
    19 ofertas

    We are seeking crypto professionals in NYC! We are seeking everything from white paper contributors to developers and smart contract professionals.

    $1188 (Avg Bid)
    $1188 Oferta Promedio
    9 ofertas

    !! READ the REQUIREMENTS before you knock !! You are expected to have good knowledge on areas such as; blockchain attacks/crypto-threats/solidity/Hyperledger/Smart-contract/Hash-Algorithms/51% attacks/Sybil attack/. You will be provided with any online books/Journals/articles that you will ask for regardless of how expensive they are. Programming skills required and essential. Your task ...

    $8 / hr (Avg Bid)
    $8 / hr Oferta Promedio
    5 ofertas
    MultiSig Wallet App iOS/Android 4 días left
    VERIFICADO

    MultiSig Wallet App iOS/Android Ability to Buy and Swap crypto using [iniciar sesión para ver URL] API Trade crypto using user existing API (binance, coinbase pro, [iniciar sesión para ver URL]) Send and Receive Crypto Wallet Creation inc Import and Export feature Live chat support Design will be supplied and API

    $3455 (Avg Bid)
    $3455 Oferta Promedio
    48 ofertas
    CRYPTO CURRENCY 4 días left
    VERIFICADO

    developer that know Blockchain with experience with cryptonote technology sources.. like Monero and/or Bytecoin to add on our official developer team.

    $851 (Avg Bid)
    $851 Oferta Promedio
    18 ofertas

    We are working on using barcodes, app , USSD or another simple tech that will be used to receive data in low income communities which will be stored using blockchain tech

    $259 (Avg Bid)
    $259 Oferta Promedio
    11 ofertas
    partners (ONLY) in Partnership 4 días left
    VERIFICADO

    I am looking for partners for a new Crypto project create wallets, create token, pre sale site (ICO) we can discus about your implication possibility

    $1208 (Avg Bid)
    $1208 Oferta Promedio
    15 ofertas

    I need some to help me deploy ethereum smart Contract asap, the code is ready, all you need is to deploy it. Nothing much!

    $44 (Avg Bid)
    $44 Oferta Promedio
    13 ofertas

    This project is only for senior experts who have proven experiences in mobile wallet of several digital assets. Need to provide several digital assets like BTC, ETH, Monero, .. Send, Receive, Exchange between assets functions to be implemented Need import/export private key Backup wallet function need Provide multi Language Hybrid both possible

    $4115 (Avg Bid)
    $4115 Oferta Promedio
    46 ofertas
    compile a coin for me 4 días left
    VERIFICADO

    Hi I want you to compile new coin for me with Explorer Windows and linux wallet Minning pool

    $807 (Avg Bid)
    $807 Oferta Promedio
    11 ofertas

    Hi there, I need someone who is able to create a ethereum node and implement a smart contract which allows the deployment of certifications. Simply Entity-A releases a certificate to entity B with few details, name, expiration, this is push on the blockchain. Please contact me for more information. Fed

    $179 (Avg Bid)
    $179 Oferta Promedio
    20 ofertas
    Need to Fork Litecoin 4 días left
    VERIFICADO

    Hi All, I want to Fork a coin based on LTC. Experience in Blockchain and cryptocurrency will only place the bid. Details will be shared over personal message. Thanks

    $890 (Avg Bid)
    $890 Oferta Promedio
    23 ofertas

    I'm looking for a developer who can create an Erc-20 token with intellectual property written in the smart contract. So the tokens legally represent shares of the intellectual property. In our case, the intellectual property will be songs. Also written in the contract, we would like the addresses and wallet value to also be part of the token. Wallet addresses on other cryptos such as music...

    $435 (Avg Bid)
    $435 Oferta Promedio
    22 ofertas
    Create new version of at code 3 días left
    VERIFICADO

    I want a new version of a qr code created to store more information. I want either more modules or more colours. Maybe black, white, grey, blue, green and red as an option or other option is for more modules so instead of 144x144 it can be like 555x555. I will also need to know how much data can be store in the code and how many kB the wr image itself will be

    $86 (Avg Bid)
    $86 Oferta Promedio
    6 ofertas

    This is part one of a multi-part evolving project. This is webapp solution will allow users to extract the blockchain data of the users' wallets. Data will be saved to a SQL server. The webapp will also periodically capture incremental data of the wallets. The webapp will then allow the user to view their wallet ledgers and token asset summary. To keep this project small and on budget, we w...

    $196 (Avg Bid)
    $196 Oferta Promedio
    12 ofertas

    This project is only for senior experts who have proven experiences in mobile wallet of several digital assets. Need to provide several digital assets like BTC, ETH, Monero, .. Send, Receive, Exchange between assets functions to be implemented Need import/export private key Backup wallet function need high security Several Language Native or Hybrid both possible

    $3679 (Avg Bid)
    $3679 Oferta Promedio
    38 ofertas

    Developing a Blockchain Technology for Healthcare data record

    $1855 (Avg Bid)
    $1855 Oferta Promedio
    31 ofertas

    I need a new website. I need you to design and build it.

    $377 (Avg Bid)
    $377 Oferta Promedio
    12 ofertas
    New crypto betting game 2 días left
    VERIFICADO

    I have a new cryptocurrency and have a new idea for a betting game to be used with my currency. I need it to be automated and fair and can be verified. Smart contract or similar to be used for random flip feature so code can be open source and verified

    $2295 (Avg Bid)
    $2295 Oferta Promedio
    21 ofertas
    Web wallet for new cryptocurrency 2 días left
    VERIFICADO

    Simple secure web wallet required for new dash fork

    $303 (Avg Bid)
    $303 Oferta Promedio
    18 ofertas
    !! Blockchain Job - 3-9 Months !! 2 días left
    VERIFICADO

    !! READ the REQUIREMENTS before you knock !! Key Factors: - You are expected to have good knowledge on areas such as; blockchain/crypto-threats/solidity/Hyperledger/Smart-contract/Hash-Algorithms/51% attacks. - You will probably need to spend 90-130 hours per month to do the required tasks. ( For instance; an experienced person, in the related area, may do the required job in 90 hours, whe...

    $287 (Avg Bid)
    $287 Oferta Promedio
    11 ofertas
    IPFS Installation 2 días left
    VERIFICADO

    Please refer to [iniciar sesión para ver URL] and i Will send you the requirement.

    $124 (Avg Bid)
    $124 Oferta Promedio
    16 ofertas
    Looking for blockchain API 2 días left
    VERIFICADO

    Looking for an expert for the API of these coins (No 3rd Party) XRP BCH EOS STELLER TETHER TRON BTC SV

    $190 (Avg Bid)
    $190 Oferta Promedio
    8 ofertas
    Ico script 2 días left
    VERIFICADO

    I need a ready-made complete ico script, if you have let me know asap.

    $101 (Avg Bid)
    $101 Oferta Promedio
    12 ofertas
    Mobile App 2 días left

    Social media, to publish documents and text

    $551 (Avg Bid)
    $551 Oferta Promedio
    17 ofertas
    BLOCKCYPHER INTEGRATIONS 2 días left
    VERIFICADO

    I NEED SOMEONE TO INTEGRATE BLOKCYPHER API FOR COINS PAYMENT ON OUR SITE

    $184 (Avg Bid)
    $184 Oferta Promedio
    15 ofertas
    ROSCA blockchain application 2 días left
    VERIFICADO

    I need you to develop ROSCA blockchain application. Please google and search for ROSCA if you do not know about it.

    $318 (Avg Bid)
    $318 Oferta Promedio
    4 ofertas

    Dear Sir/Madame Dero is the first crypto project to combine a Proof of Work blockchain with a DAG block structure and wholly anonymous transactions. The fully distributed ledger processes transactions with a twelve-second average block time and is secure against majority hashrate attacks. Dero will be the first CryptoNote blockchain to have smart contracts on its native chain without any extra la...

    $5717 (Avg Bid)
    $5717 Oferta Promedio
    13 ofertas

    Hi! I am looking for a crypto expert to help me understand some of the basic concepts of the blockchain and programming. Thanks!

    $929 (Avg Bid)
    $929 Oferta Promedio
    26 ofertas
    Crypto Mining 1 día left

    Hello, I am looking for someone who has a big knowledge in crypto currencies and mining.

    $31 / hr (Avg Bid)
    $31 / hr Oferta Promedio
    25 ofertas

    Hello! Please be sure you read this prior to contacting or placing a bid so you know exactly what I am looking for. Thank you! The details for this project are as follows: I need a lightweight multi currency wallet. This wallet will NOT have to download the entire chain for all the currencies in this wallet. This wallet will run on Windows 7 and up. The user should be able to switch between t...

    $2205 (Avg Bid)
    $2205 Oferta Promedio
    20 ofertas

    Hello, I want someone to build me a personal Cryptoscreener similar to TradingView, the difference is it will import the coins data from another website and not like TradingView, cause it doesnt have so many crypto currencies. I dont care if its web based or a software. Contact me only if you think you can do it! Thanks,

    $1124 (Avg Bid)
    $1124 Oferta Promedio
    14 ofertas

    Need to develop a Crypto Currency exchange Similar to Binance. Please only beed who worked on Blockchain and Crypto Currency Exchange development.

    $18690 (Avg Bid)
    $18690 Oferta Promedio
    31 ofertas

    Looking for Multi Crypto Currency Exchange like Binance.

    $680 (Avg Bid)
    $680 Oferta Promedio
    12 ofertas

    Create an Blockscout GraphQL setup, make calls to get information to render the ERC721's via Swift through the specified "Trust-wallet-ios". The goal is to render all the ERC20's, as well as any ERC721's in the given mobile wallet on the given RPC address. This job is for not only for a Swift & GraphQL experienced & someone with blockchain knowledge on how to par...

    $155 (Avg Bid)
    $155 Oferta Promedio
    10 ofertas

    Hi MxiCoders Private Limited, I noticed your profile and want to extend my project offer out to you, we can discuss the details over chat.

    $475 (Avg Bid)
    $475 Oferta Promedio
    13 ofertas