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Bitcoin is a crypto currency, with the creation and the transfer of the bitcoins being based on a protocol that does not depend on the central authority. The coins can be transferred through computers or through smartphones and related devices, without the necessity of having a financial institution as an intermediate. This concept was established by Satoshi Nakamoto in 2008 and it was geared towards the world of electronic cash systems. If you understand more about this topic on a professional level, then you have a better chance to enjoy the advantages of being a freelancer at Freelancer.com.

Bitcoin has its own technical part that needs to be addressed by professionals. If you are one of them, then you should be on a platform that ensures the consistency of job posting by clients. When working as a bitcoin freelancer at Freelancer.com, you will have access to many of the jobs posted by clients from all over the world and bid on those that are within your professional level. There is too much to enjoy while working at the leading freelancer platform online, including getting paid at rates that your services deserve, giving you the encouragement you need to keep on working on more Bitcoin projects.

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    35 trabajados encontrados, precios en USD
    Wallet Bitcoin Ionici 4 6 días left
    VERIFICADO

    I need an App in Ionic 4+ A wallet that receives bitcoins and that also transfers. You can use a third party services API. To do this tasks.

    $523 (Avg Bid)
    $523 Oferta Promedio
    18 ofertas
    Crypto Exchange 6 días left

    I need a new cryptocurrency trading website. I need you to design and develop with liquidity integration. Thanks

    $1800 (Avg Bid)
    $1800 Oferta Promedio
    26 ofertas

    Altcoin crypto live exchage pm demos and models.

    $2048 (Avg Bid)
    $2048 Oferta Promedio
    28 ofertas

    Given a XMR or BCH address, I need a function that takes that address as input and returns true if the address is valid or false if it is not. Simple regex would *not* work, I need offline crypto validation. I don't need to know if the address have ever been used or created. I don't need to know if the address has funds in it. If you need to use Perl libraries, ideally if they are incl...

    $33 (Avg Bid)
    $33 Oferta Promedio
    5 ofertas

    Bitcoin hard fork with pos instead of pow. Fork at halving point. The block size will increase to 32mb with 1 block every 2 minutes instead of 10. Coins will be shared among current bitcoin users with the same address and a handful of dead addresses with dead bitcoins will be excluded and those bitcoins will go to admins wallet. Total supply will change to 30,000,000 and block reward will change

    $5979 (Avg Bid)
    $5979 Oferta Promedio
    15 ofertas

    Looking for someone who has a good knowledge in blockchain technologies

    $173 (Avg Bid)
    $173 Oferta Promedio
    5 ofertas

    This is completely decentralized. Users must be approved with kyc before trading. Each asset has a full page with info, logo and links etc that can be added via admin panel. Companies must apply to be listed and I can add them via admin panel when approved. Transaction fees are 0.1% of each trade to go to admin. Each token will be 0.00000001 as default when listed and this is the lowest amount tha...

    $1971 (Avg Bid)
    $1971 Oferta Promedio
    29 ofertas

    I Want a new bitcoin wallet where a public and private key is generated for each address similar to a pgp key. The bitcoin address will be complete encrypted in a pgp style format so users will pay into the public key or wrong code that gets generated for it. This key can have a condensed version also that can be passed around as an address. The idea behind this is to add extra security and privac...

    $409 (Avg Bid)
    $409 Oferta Promedio
    10 ofertas

    We are truly excited to launch what we consider to be a revolutionary product. A platform that combines a fresh, new approach to P2P, Microfinancing, Micropayment Management, Proprietary value solutions with the decentralized, trustless technology Blockchain. We are currently actively looking for: A. ADVISERS - competent, reliable, knowledgeable professionals with knowledge in the following fie...

    $87 / hr (Avg Bid)
    $87 / hr Oferta Promedio
    25 ofertas
    api management 5 días left

    i need a program to manage more then one API for cryptocurrency trading platform

    $1266 (Avg Bid)
    $1266 Oferta Promedio
    27 ofertas

    I need create payment gateway on my site, it must works with blockchain API, user send money -> 2 confirmations -> user receive money on site (virtual money,coins)

    $186 (Avg Bid)
    $186 Oferta Promedio
    18 ofertas

    I need to develop my own wallet system without any third party like [iniciar sesión para ver URL] or any other please don't bid if you don't do this I need this urgent thanks

    $1722 (Avg Bid)
    $1722 Oferta Promedio
    21 ofertas

    I am in need of a data entry clerk who can handle entry level duties and i am in need of a bitcoin expert

    $21 / hr (Avg Bid)
    $21 / hr Oferta Promedio
    12 ofertas

    I don't need the general proposal so that you MUST answer per my questions! First of all, I am not looking for an independent freelancer, only agency can be accepted! 1. How many years of experience in Blockchain? 2. Which cryptocurrency are you familiar to use ? 3. I am gonna make my own cryptocurrency like Bitcoin, Ethereum, like this. How about this ? 4. If you are interested in my busine...

    $35550 (Avg Bid)
    $35550 Oferta Promedio
    53 ofertas

    Hallo Zusammen, für unsere Firma suchen wir für interne Zwecke: Telegram Bot Kundendatenbank Ein und Auszahlung via BTC 5 Stufen affilat system tägliches jackpot spiel mit score für welchen preis kann mir jemand dieses produkt bauen? vielen dank im vorraus -----‐----- Hello everyone, for our company we are looking for internal purposes: Telegram bot Customer database De...

    $1135 (Avg Bid)
    $1135 Oferta Promedio
    4 ofertas

    Looking to add the equihash algo to the yiimp mining pool platform. [iniciar sesión para ver URL] Milestone will be paid out at successful completion and after a block has been hit on the stratum.

    $416 (Avg Bid)
    $416 Oferta Promedio
    3 ofertas

    Need an expert with experience in Bitcoin, Blockchain Coding Expert

    $40 (Avg Bid)
    $40 Oferta Promedio
    10 ofertas

    This website will have: - Game (game + relevant Admin Panel data + provably fair) - Deposit and withdraw (Bitcoin + Welcome Bonus) - Affiliates (Invite users for % of commission with affiliate code/link) - Level up (levels up the user and users receive rewards) - Chat (including moderators) - etc Message me for more information including document with the features + requirements, images and desi...

    $1749 (Avg Bid)
    $1749 Oferta Promedio
    35 ofertas
    Professional stock investor 3 días left
    VERIFICADO

    I have some cash and i want to invest them in stocks, i have no experience and i have no time. So i need someone who can make me profit with buying stocks and they will get a salary each month. Depending on experience

    $485 (Avg Bid)
    $485 Oferta Promedio
    3 ofertas
    bitcoin doubler 3 días left

    I want to create a bitcoin bending page or I need a script to create a bitcoin bending page

    $50 / hr (Avg Bid)
    $50 / hr Oferta Promedio
    9 ofertas
    I need a blockchain developer 2 días left
    VERIFICADO

    I want to create a blockchain from brand new. With the same features at Bitcoin plus more privacy. Developing of the White paper Developing the coin protocol (10 million coins) , deploying nodes, creating wallets and a website, ICO. I have attached 90% finished White paper. I want everything created and ready to for Entering crypto exchange. Services needed: Crypto Coin Development ...

    $5105 (Avg Bid)
    $5105 Oferta Promedio
    8 ofertas

    I really don't understand anything about blockchain. The result we want is to save accounting information with this tool. such as [iniciar sesión para ver URL] I have a sheet in Excel with data, that data is true and we want to certify / tokenize it in blockchain. If you are expert in this field, please send me your proposal for this. Thanks

    $1454 (Avg Bid)
    $1454 Oferta Promedio
    33 ofertas

    Need a person who expert in find the private key of blockchain imported adress.

    $937 (Avg Bid)
    $937 Oferta Promedio
    4 ofertas
    Peer to peer crypto exchange 1 día left
    VERIFICADO

    Want a dev to join our team and develop a crypto exchange in our ongoing app project. Main function will just be work on the cryptos exchange section

    $991 (Avg Bid)
    $991 Oferta Promedio
    28 ofertas
    Lead generation 1 día left

    I need crypto, forex, bitcoin and Coinbase investors. This will required full details like, first name, last name, phone numbers, emails and other neccesary information. You can inbox me with little samples to text and if this are real and active then I go with and buy more and we make sweet deal. Please don't message me if you can't do this. So don't waste your offer. Best Regards.

    $446 (Avg Bid)
    $446 Oferta Promedio
    8 ofertas

    Requirements for a team: 1) Senior Java Background. 2) Solid Security and Cyber Security Background. 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 can be offered! Pay will be for this project and 4 months of full support and security must be included. 5) Contract must be signed. Must be...

    $4540 (Avg Bid)
    $4540 Oferta Promedio
    42 ofertas

    we need to develop a blockchain with POS algorithm with Master Node functionality. Similar to Dash or PIVX Bid only if: you have developed such coin in last (verifiable link mandatory) have at least one year of proven experience in blockchain development. it is an urgent project to bid only if you can start within 72 hours. make sure you don't copy paste your proposal. if you have till he...

    $420 (Avg Bid)
    $420 Oferta Promedio
    6 ofertas

    Simple Buy/Sell exchange website that reroutes customers order to known exchange like Bitstamp. Every basic functionality should be available (deposit fiat, withdraw fiat, deposit/withdraw bitcoin). Sign up, login, etc. Payment gateway: iDeal I only consider proposals that describe all issues and their solutions. No automated replies.

    $1388 (Avg Bid)
    $1388 Oferta Promedio
    18 ofertas

    build bitcoin php wallet exchange website in php

    $2497 (Avg Bid)
    $2497 Oferta Promedio
    66 ofertas

    Hello, In way to run an new service in crypto domain, like an web wallet who allow each user to download an control the private key, we need an expert on crypto dopain / blockchain for create this new service. Quick brief : for sample with PIVX COIN User able to : - create wallet - send and receive coin - check transaction history - download the privatekey locally. for reduce all risk of hack...

    $559 (Avg Bid)
    $559 Oferta Promedio
    25 ofertas
    ECDSA Project 5 horas left
    VERIFICADO

    Simulate a blockchain (encrypted with ECDSA) with two transactions, preferably using the Java's Bouncy Castle (but other languages are acceptable too). The output should be a JSON containing the transaction and block hash, signature and other transaction details. Requirements can be found in the word document attached.

    $74 (Avg Bid)
    $74 Oferta Promedio
    6 ofertas

    I need a Crypto expert for my current projects. If you have knowledge please bid. Details will be shared in message with the freelancers.

    $7 - $103
    Sellado
    $7 - $103
    10 ofertas

    I need a Crypto expert for my current projects. If you have knowledge please bid. Details will be shared in message with the freelancers.

    $7 - $68
    Sellado
    $7 - $68
    4 ofertas

    I am looking for engineer who can work with our team to develop the Bitcoin website... Must be good at Blockchain and website and DB.... Also, have got a good knowledge of AWS.

    $750 - $1500
    Sellado
    $750 - $1500
    96 ofertas

    I need a Crypto expert for my current projects. If you have knowledge please bid. Details will be shared in message with the freelancers.

    $7 - $69
    Sellado
    $7 - $69
    56 ofertas

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