Blockchain 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.

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    55 jobs found, pricing in USD

    Hello, We are looking for Companies tieups for web Development and blockchain projects. We wont pay advance. But Work on post paid milestones only. You can work on your local server and once approved and tested by us, we release payment on freelancer. Pls. we want hardworking companies and freelancer only. We require delivery of work on time and with accuracy Thanks

    $36 (Avg Bid)
    $36 Avg Bid
    5 bids
    IOTA SMART CONTRACT PROJECT 6 days left
    VERIFIED

    WE WANT TO DEVELOP OUR TOKEN WITH IOTA BLOCKCHAIN , WE NEED TO HAVE SMART CONTRACT WE NEED LINK TO OUR WEBSITE WALLET HAVE TO WORK WITH DEVINET

    $750 - $1500
    $750 - $1500
    0 bids
    Hummingbot Bot Update 22 hours left
    VERIFIED

    We need the Hummingbot Trading Bot updated and tested with the following changes found at Github

    $250 - $750
    Featured Urgent Sealed NDA
    $250 - $750
    8 bids

    I am looking for a expert blockchain developer who is very familiar with BSC network. Project budget is not final and will be flexible to change according to what work is agreed on. I am looking for the following: -Smart contract development -Staking contract development -working on tesnet -contract must pass all audits These jobs depend on if contract work continues -launchpad development 10-20k+ -Social media forum development 5-10k Start date immediately. Pay is subject to negotiation. Must use telegram and communicate daily with the team. Fluent in English is a requirement. Past blockchain work must be presented. I look forward to your application. Thanks NO NFT PROJECT

    $175 (Avg Bid)
    $175 Avg Bid
    27 bids

    Need smart contract developer BSc for presale contraction n testing. Developer from India only

    $11 / hr (Avg Bid)
    $11 / hr Avg Bid
    5 bids
    Ethereum node sync issues 6 days left
    VERIFIED

    Ethereum full node syncing slowly and litenode doesnt get synced. Need someone who can fix the issue quickly. Should have hands on experience on Geth Nodes and handlh Beacon ETH chain.

    $12 / hr (Avg Bid)
    $12 / hr Avg Bid
    5 bids

    Need a smart contract developer for smart contraction interaction ico contract with the front end. need from India only.

    $6 / hr (Avg Bid)
    $6 / hr Avg Bid
    10 bids
    Crypto Exchange -- 3 6 days left
    VERIFIED

    PLEASE READ CAREFULLY: I search for a solution like this: With the possibility to add own credit card provider

    $814 (Avg Bid)
    $814 Avg Bid
    39 bids
    DApp Development 6 days left
    VERIFIED

    We are looking for an Experienced Blockchain Developers to Build us a DApp like this: This DApp has too many features. We only want the Following features. Convert, Pools, Lottery, Play and Poker. Please visit the Website ( ) so you have an idea exactly what we are looking for. Send your interest if you are Experienced, Have substantial reviews and also have worked on something similar with reference links.

    $8414 (Avg Bid)
    $8414 Avg Bid
    27 bids

    Hi guys Looking for a web3 blockchain developer that can create and deploy private blockchain and dapps project. PLEASE NOTE THIS IS NOT DEVELOPMENT OF CRYPTOCURRENCY. Only bid if you have done web3 private blockchain before. Example project: NO AGENCY NO COMPANY SCAMMERS PLEASE STAY AWAY YOUR TICKS WONT WORK ON ME

    $123 (Avg Bid)
    $123 Avg Bid
    32 bids

    Will discuss upon discussion, WP is ready and need to start the project ASAP.

    $4375 (Avg Bid)
    $4375 Avg Bid
    16 bids
    Dynamic Flashloans Execution 5 days left
    VERIFIED

    * First Milestone Given an atomic transaction ID, we need an API call that returns whether it is profitable to copy/imitate that transaction in the current time. is one example of these transactions. The guy who did this transaction started with 0.027497 BNB, swapped them to Kinka token via Pancakeswap, then sold them on Apeswap and ended up with 0.029699 BNB. The profit from this transaction is around 0.002 BNB. We will be probing transactions on BSC to avoid high gas fees. I will ask you to deploy this API somewhere to be able to call it without knowing the code yet. You'll give us at least two days where we will test your API against multiple transactions. If the similar transaction deems to be not profitable your code will test with a smaller amount and return the profitable ...

    $497 (Avg Bid)
    $497 Avg Bid
    15 bids
    Tableau/PowerBI + Blockchain 5 days left
    VERIFIED

    Hi, I am looking for developer with experience of Tableau or PowerBI implementation. Xero, Blockchain experience would be a plus. More details through chat.

    $475 (Avg Bid)
    $475 Avg Bid
    17 bids
    Trading/Frontrunning Bot -- 2 4 days left
    VERIFIED

    I recently had a Metamask trading bot coded that has been found to be malicious. The bot would accept deposits, function properly, but not withdraw. I've already lost quite a bit to this scam. This story only gets worse so I'll keep those details to myself but if you're interested, I will share. This project has a very short timeframe because just because we were scammed doesn't mean creditors understand the situation. My family and I need someone to be our white knight or white hat hero - whatever you want to call it. I am looking for someone who can make, from scratch, a front running, arbitrage, or other passive income bot that can help us while I recover, find a new job, and try to recover our stolen savings. The key part is that I want you to create for me wha...

    $2687 (Avg Bid)
    $2687 Avg Bid
    6 bids
    Tableau or PowerBI 4 days left
    VERIFIED

    Hi, I am looking for developer with experience of Tableau or PowerBI implementation. Xero, Blockchain experience would be a plus. More details through chat.

    $471 (Avg Bid)
    $471 Avg Bid
    29 bids

    You must be an expert with , Typescript and blockchain. If not, don't bid. Create a simple landing page using NextJs, Typescript, Tailwindcss and Web3. The figma link is as follows: The goal is To: Connect your wallet to either Metamask, Coinbase or Trustwallet and show the connected address Replicate the UI as seen on figma, and make it responsive Use the stack mentioned above Host on any hosting platform and reply with the url… vercel is recommended This must be finished in 36 hours from now. This figma file is only 7% of the whole project. What are we looking out for: Clean typed code Good folder structure Attention to details Speed We will check your code in detail

    $128 (Avg Bid)
    $128 Avg Bid
    27 bids

    We are looking for a developer to create a Smart Staking Token based on TRC-20. The developer should be familiar with TRC-20, Tokennomics, and Web Wallet Integration to create a functional and economically sound token. The token's total supply will be 54cr, divided among public offerings, dividends, referral awards, management funds, airdrops, etc. This will be hard-coded into the decentralized smart contract. There is a lot more which is impossible to discuss in this job post. The developer should have a good understanding of the cryptocurrency landscape and be able to provide insights into the token design. The candidate should also be familiar with cryptocurrency exchanges/ The successful applicant will work closely with our team to develop a professional website and whitepaper...

    $320 (Avg Bid)
    $320 Avg Bid
    16 bids

    need a content writer having experience in ICO content writing and can provide a good articles with perfect flow of writing.

    $20 (Avg Bid)
    $20 Avg Bid
    15 bids

    Blockchain Website & App Expert require for Payment Exchange and own Payment Gateway - Platform Require Like Stripe and PayPal + with multiple options for Accepting payments and Sending payouts globally. Website & App Design Responsive Website & App Development (Flutter or React Native) Modern Design, Extra Smooth Transitions & 3d Look Money Exchange. Wallet - Account, Transactions, Card, etc. Payment Gateway. (API, SDK & Plugins) Panels/Dashboard Full Website & App Control - Admin Panel & Staff Panel Website, App, Admin & APIs, SDK, Plugins Complete Documentation and 6 month complete Support -- Users can credit payments to their website account (from any source) -- Users can withdraw payments to any required accounts (banks, cards...

    $2161 (Avg Bid)
    Featured NDA
    $2161 Avg Bid
    15 bids

    Please take a look at the demo on the following page: Connecting a phantom wallet (with some test USDC on Devnet), selecting 1 Box, and clicking on "Checkout" will redirect to the following url: If I decide to append some variables and load up the following url instead: I'd like to be able to grab the url variables and to make them available for use within the file. Then, I'd like you to simply encode/encrypt the "box-of-cookies=1&basket-of-cookies=0&city=Paris&country=France" string so that the url could be loaded as follows: or as and then the encrypted variables should be decoded/decrypted and made available for use within So I would have the option to load either the standard url or encoded/encrypted url and in both cases the...

    $33 (Avg Bid)
    $33 Avg Bid
    10 bids
    Crypto currency 3 days left

    I need help making an crypto currency coin, I will pay extra if you help with marketing as well.

    $762 (Avg Bid)
    $762 Avg Bid
    37 bids
    Blockchain script 3 days left
    VERIFIED

    Im looking for a developer that can build me script.

    $186 (Avg Bid)
    $186 Avg Bid
    61 bids
    Crypto mining app -- 2 3 days left
    VERIFIED

    I need a crypto mining app like pi Needs to mine my tokens and then redeem them from my site. Must play ads. Allow people to invite people Have push notifications track invites Have a 24 hour timer to have to mine again. Have back end so I can see database of subscribers.

    $30 - $250
    Sealed
    $30 - $250
    21 bids
    Build me Arbitrage Crypto Bot 3 days left
    VERIFIED

    Hi I am a Crypto trader. I am looking for someone to build me an Arbritage Crypto Bot. I would not be paying for any anything outside of Freelancer all payments will go through here. If you can help please kindly let me know.

    $1590 (Avg Bid)
    $1590 Avg Bid
    78 bids
    Trading/Frontrunning Bot 3 days left
    VERIFIED

    I recently had a Metamask trading bot coded that has been found to be malicious. The bot would accept deposits, function properly, but not withdraw. I've already lost quite a bit to this scam. This story only gets worse so I'll keep those details to myself but if you're interested, I will share. This project has a very short timeframe because just because we were scammed doesn't mean creditors understand the situation. My family and I need someone to be our white knight or white hat hero - whatever you want to call it. I am looking for someone who can make, from scratch, a front running, arbitrage, or other passive income bot that can help us while I recover, find a new job, and try to recover our stolen savings. The key part is that I want you to create for me wha...

    $470 (Avg Bid)
    $470 Avg Bid
    29 bids

    We want to see what options are available for transferring our coffee loyalty program currently used at our cafe using physical cards, to a blockchain system. We understand that this may not be the typical use of the blockchain but we intend to start small and build upon it later.

    $969 (Avg Bid)
    NDA
    $969 Avg Bid
    49 bids

    We want to see what options are available for transferring our coffee loyalty program currently used at our cafe using physical cards, to a blockchain system. We understand that this may not be the typical use of the blockchain but we intend to start small and build upon it later.

    $833 (Avg Bid)
    $833 Avg Bid
    83 bids

    Need Fractional NFT market place based on ERC 1155 - NFT minting function (owner only) - Each NFT can connect to uniswap pool - User dashboard

    $691 (Avg Bid)
    $691 Avg Bid
    28 bids
    NFT market place 3 days left

    we need a simple Fractional NFT project based on 1155 erc - NFT minting - Each NFT can connect to uniswap pool - user dashboard

    $682 (Avg Bid)
    $682 Avg Bid
    28 bids

    Must have: Swift Xcdoe coding capability Blockchain/web3/walletconnect metamask integration knowledge App: We need to use an API/SDK like () and build a scanning mobile application. Also need NFT marketplace. User can capture image and make NFT. Need capable team with previous blockchain projects.

    $17260 (Avg Bid)
    $17260 Avg Bid
    44 bids
    Crypto casino 2 days left
    VERIFIED

    Looking for a crypto casino that someone has already built. Must be online and able to play against each other for tokens and have at least one slot machine.

    $250 - $750
    Sealed
    $250 - $750
    53 bids

    We are looking for a developer / a team of developer to develop a mini games platform. for both website and apps (android / iOS) Example : Web-based : Android Version : A platform where alot of people / user can submit their mini games, and user can play in several mode (duel, war, challenge, etc) and user can earn points / coins. We also would like to have a referral system in the platform.

    $4337 (Avg Bid)
    $4337 Avg Bid
    29 bids

    Make a blank flat land metaverse with parcels for sale, online, with a mini map and people running around it. People will be able to buy their parcels and upload what they want in their space. Get this done in and smart contracts. You must be able to import the metaverse property from some source. Build a parcel place with 44,000 spots On a flat board with a mini map and a person able to run around it and see each square for sale. The map can be blank like a net and the people that run around can be imported from ready player me And the land connects to Metamask and takes BNB and ETH. Must be able to see each other online. If you can do this we will spend a lot more on the actual building out of the system. If you cant do this simple task within 250 to 300 dollars dont apply. ...

    $250 - $750
    Sealed
    $250 - $750
    24 bids

    Looking for 1-2 Senior Solidity Developers, can be part-time (10-20 hrs a week) or full-time: Requirements: * Familiarity with Test-Driven Development. * Have experience developing well-designed REST APIs. * Understanding of Blockchain architectural design patterns as well as supporting infrastructure. * Expertise in providing end-to-end solutions (Life Cycle for infrastructure including SDLC). * Knowledge of ERC20, ERC721, and other protocols. * In-depth knowledge of blockchain logic. * Understanding of fundamental encryption mechanisms. * Experience in peer-to-peer networking. * Understanding of Smart Contracts and consensus techniques, as well as experience developing blockchain apps or proofs-of-concept (POCs) in Solidity on Ethereum. * Hands-on development expertise in the following ...

    $36 / hr (Avg Bid)
    $36 / hr Avg Bid
    69 bids

    I'm attaching a text file of the complete requirements of the project. I need an api based solution so that I should be able to use the code only with the api keys of my Binance account.

    $918 - $1836
    Featured Sealed
    $918 - $1836
    13 bids
    Wordpress developer -- 2 2 days left
    VERIFIED

    We have a Wordpress theme - needed to be customize.

    $128 (Avg Bid)
    $128 Avg Bid
    211 bids

    I want to know if you can help me with one thing. I am a professional bettor and I have a Betting Tipster service in Football (Soccer). I want to know if is possible to create a Smart Contract with my bets and link to Decentralized Betting Bookies? For example all the costumers send the money to the one wallet and that wallet will manage the money and betting according to the strategy. And the profit will be shared to all the accounts according to the time that we define.

    $587 (Avg Bid)
    $587 Avg Bid
    40 bids

    Hi I am looking for a blockchain & frontend engineer can build nft tile map with React. If you have experience, don't hesitate to apply. I will hire you immediately and we can work further. Kind regards

    $1176 (Avg Bid)
    $1176 Avg Bid
    108 bids
    NFT project 2 days left

    I need someone who can help me fixing some issues with a nft project

    $559 (Avg Bid)
    $559 Avg Bid
    55 bids

    Hello dear freelancer, I need your aid with an issue I'm facing with digital currencies

    $509 (Avg Bid)
    $509 Avg Bid
    52 bids

    Here is my platform, I am going to update it with new code and work as well Also going to integrate some platforms on my bridge

    $57 (Avg Bid)
    $57 Avg Bid
    8 bids

    Make a blank flat land metaverse with parcels for sale, online, with a mini map and people running around it. People will be able to buy their parcels and upload what they want in their space. Get this done in and smart contracts. You must be able to import the metaverse property from some source. Build a parcel place with 44,000 spots On a flat board with a mini map and a person able to run around it and see each square for sale. The map can be blank like a net and the people that run around can be imported from ready player me And the land connects to Metamask and takes BNB and ETH. Must be able to see each other online. If you can do this we will spend a lot more on the actual building out of the system. If you cant do this simple task within 250 to 300 dollars dont apply. ...

    $250 - $750
    Sealed
    $250 - $750
    22 bids

    patrick video code provided on github you have to extend that nft marketplace with e voting feature on assets owned by multiple accounts . and biding system on that on a goerli testnet network.

    $14 (Avg Bid)
    $14 Avg Bid
    4 bids

    Modules User Candidate Finger print Blockchain technology has already been hailed as a way to support the need for trust between transactions in an electronic information system. The issues of helpless anonymity and low competency associated with traditional democracy have been partially addressed by electronic democracy. Digital democracy. We cannot ignore the difficulties it creates in monitoring the vote-counting procedures or the fact that it calls for the presence of a trustworthy third party. Due to its decentralization, anonymity, and non-tampering capabilities, blockchain technology has recently emerged as a more viable alternative to electronic voting. In this study, we suggest an online voting system based on the Blockchain. We can vote using a mobile device from anywhere...

    $125 (Avg Bid)
    $125 Avg Bid
    9 bids
    Blockchain/DAO 16 hours left

    Community focused blockchain/Web3 incubator in fashion. Work involves DAO front end, smart contract based blockchain development, and innovative web3 models.

    $2376 (Avg Bid)
    $2376 Avg Bid
    83 bids

    Hello - I'm looking to build a non-custodial (self-custody), multi-chain, wallet with on/off ramp for fiat. I'd also like an integrated DEX/exchange/swap feature where we will charge a transaction fee (not sure if I would need to set up a separate treasury function to collect and store these fees, etc?). Happy to hear suggestions on collecting fees. Also, I'd like this wallet to be able to connect to other Dapps/protocols as well (not sure if this would need to be integrated with existing tech to do so, ie, WalletConnect or something similar?) I'd like this multi-chain, as many chains to begin with - happy to take your advice here. My plan would be to start somewhere and build this out over time. Longer term plan would be to build out a "Pro" version for inst...

    $36 / hr (Avg Bid)
    $36 / hr Avg Bid
    37 bids

    This project is not based on EVM and solidity so don't pitch me that . A nodejs developer with knowledge on blockchain technology can do this job , so write NODEJS WITH STEEM in your bid so i will check it I want a opensource project made on nodejs and mongo db to modify and operate as per my requirements more to be discussed later thanks

    $170 (Avg Bid)
    $170 Avg Bid
    56 bids
    Auto trading bot 9 hours left
    VERIFIED

    I need a pancakeswap and uniswap trading bot. Contact me ONLY if you can deliver effectively.

    $292 (Avg Bid)
    $292 Avg Bid
    26 bids

    Pharma supply chain optimization with Ethereum Virtual Machine Nodejs for backend, Solidity for smart contract and Reactjs for frontend

    $834 (Avg Bid)
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    59 bids

    PHASE 1: Cryptocurrency Short Selling Protocol w/ or w/o Counterparty and basic Ui, for personal DEX trading Options: 1. Add “short selling” functionality to 1inch swap or similar 2. Create short selling pool w/ bonding curve or live price discovery PHASE 2: after live testing, Finish public Ui Short selling page.

    $1179 (Avg Bid)
    $1179 Avg Bid
    105 bids

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