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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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    49 trabajados encontrados, precios en USD

    We want to ramp up a project similar to [iniciar sesión para ver URL] check out the whitepaper, maybe with some other easy understanding games and also with some Coin (Ante at [iniciar sesión para ver URL]) but it should be also possible to use a coin which exist. Because of the high transaction (games) we need a blockchain which can handle so many transactions maybe ripple? We have ...

    $20 / hr (Avg Bid)
    $20 / hr Oferta Promedio
    10 ofertas

    I'm looking for someone who have enough experience a EOS Smart Contract. This project has to finish within 3 days. Project details will discuss with chat. Required need Skill: EOS Blockchain, smart contract, C++

    $616 (Avg Bid)
    $616 Oferta Promedio
    14 ofertas
    Trophy icon cryptocurrency logo 5 días left

    Logo design for cryptocurrency exchange company. name: renovato

    $200 (Avg Bid)
    $200
    127 participaciones

    I need a experience memory coder(s) to develope me a software program for Online Gaming in either C/C++. It will be used as a assistance for A.imin.g purposes. Experienced coders need only bid. Contact me for a more in-depth discussion.

    $1041 (Avg Bid)
    $1041 Oferta Promedio
    13 ofertas

    Main goals: inventing the simplest technical solutions for business problems writing a technical task and setting tasks for developers (solidity, javascript, html, css) code review, control of developers and ensuring the implementation of development plans in a timely manner. The project suggests: participation in the writing of documentation; interacting with teams that develop other products; d...

    $39 / hr (Avg Bid)
    $39 / hr Oferta Promedio
    19 ofertas
    ERC-20 smart contract+ICO wallet 5 días left
    VERIFICADO

    ERC-20 smart contract+ICO wallet

    $889 (Avg Bid)
    $889 Oferta Promedio
    30 ofertas

    Need to audit our stable coin smart contract. Interested people send me your previous work

    $180 (Avg Bid)
    $180 Oferta Promedio
    3 ofertas

    creating a peer to peer trading website like [iniciar sesión para ver URL] with more features

    $1161 (Avg Bid)
    $1161 Oferta Promedio
    38 ofertas

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

    $177 (Avg Bid)
    $177 Oferta Promedio
    11 ofertas

    I need a profitable forex trading signal

    $6818 (Avg Bid)
    $6818 Oferta Promedio
    23 ofertas

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

    $4224 (Avg Bid)
    $4224 Oferta Promedio
    13 ofertas
    ASIC FPGA Firmware development 4 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?

    $2056 (Avg Bid)
    $2056 Oferta Promedio
    3 ofertas

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

    $225 (Avg Bid)
    $225 Oferta Promedio
    23 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...

    $2583 (Avg Bid)
    $2583 Oferta Promedio
    31 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?

    $249 (Avg Bid)
    $249 Oferta Promedio
    10 ofertas
    BLOCKCHAIN AUTHENTICATION 4 días left
    VERIFICADO

    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...

    $456 (Avg Bid)
    $456 Oferta Promedio
    13 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.

    $313 (Avg Bid)
    $313 Oferta Promedio
    10 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...

    $4352 (Avg Bid)
    $4352 Oferta Promedio
    43 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 2 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

    $3421 (Avg Bid)
    $3421 Oferta Promedio
    49 ofertas
    CRYPTO CURRENCY 2 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 2 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

    $1243 (Avg Bid)
    $1243 Oferta Promedio
    17 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!

    $40 (Avg Bid)
    $40 Oferta Promedio
    15 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

    $4102 (Avg Bid)
    $4102 Oferta Promedio
    47 ofertas
    compile a coin for me 2 días left
    VERIFICADO

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

    $786 (Avg Bid)
    $786 Oferta Promedio
    12 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

    $173 (Avg Bid)
    $173 Oferta Promedio
    22 ofertas
    Need to Fork Litecoin 2 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

    $863 (Avg Bid)
    $863 Oferta Promedio
    24 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...

    $427 (Avg Bid)
    $427 Oferta Promedio
    23 ofertas
    Create new version of at code 2 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

    $3653 (Avg Bid)
    $3653 Oferta Promedio
    40 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
    13 ofertas
    New crypto betting game 1 día 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

    $2191 (Avg Bid)
    $2191 Oferta Promedio
    22 ofertas

    Simple secure web wallet required for new dash fork

    $308 (Avg Bid)
    $308 Oferta Promedio
    19 ofertas
    !! Blockchain Job - 3-9 Months !! 20 horas 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 16 horas left
    VERIFICADO

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

    $126 (Avg Bid)
    $126 Oferta Promedio
    17 ofertas
    Looking for blockchain API 14 horas 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 11 horas 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 9 horas left

    Social media, to publish documents and text

    $551 (Avg Bid)
    $551 Oferta Promedio
    17 ofertas
    BLOCKCYPHER INTEGRATIONS 8 horas 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 7 horas 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!

    $958 (Avg Bid)
    $958 Oferta Promedio
    27 ofertas