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    6,265 ethereum jobs found, pricing in USD

    Need to create token with polygon and encryption communication development We will develop cex/dex encryption Exchange with Polygon Network Coins, please Details on share price, timetable, demos and more Information such as exchange, wallet type, etc. Required skills Blockchain, Cryptocurrency, Ethereum, PHP, smart contract

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    software build 6 days left

    Software Architecture We are interested in creating a service where you can transfer from one wallet to another and save the inputs in the blockchain, these transactions must be in bitcoin and ethereum, the language requested is PHP Laravel,MySQL,PHP Skills required HTML, Laravel, MySQL, PHP, Software

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    Not reload page after form submit & check correct fields Hello I have an HTML form () already done.
I need to fix few thing… 
First , I don’t want the page reload to the “post” url when the form is submitted. The second thing is about checking the 3 fields before to submit First field: A text field (Ethereum address) It must contain 42 alphanumeric characters and it must start with 0x. If the field is not fill correctly then it display the Div Id “eth-not-valid”. Second field: A text field (email address) It must be the right format as an email address. If the field is not fill correctly then it display the Div Id “email-not-valid”. Third field: A text field ( it must be a number ) If the field contain other thing than n...

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    ...connection is made through Wifi defined in the source code, that is, whenever a network changes I have to load the updated code on ESP8266 Changes I want: 1) Inform the Wifi data by cell phone through a screen connected to Esp8266 instead of defining the username and password by the source code. 2) On the same cell phone screen, select which currencies should appear on the ESP8266 screen: Bitcoin, Ethereum, Doge, EOS, Tron, Litecoin, BNB, Cardano, Solana, Monero e Stelar (to get these values ​​you can use the coingecko api: en/api) and "TStar" where you can get the values ​​through the SunSwap API: 3) The initial access to the browser must have a password to allow the change and/or configuration of the Wifi password and the coins

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    NFT Marketplace 5 days left
    VERIFIED

    Looking or someone with experience in Building an NFT marketplace with Polygon, , Tailwind, Solidity, Hardhat, , and IPFS - info here: We want to get a basic sample project up and running and then we will move into more customisations there after. Must have experience with NFTs and Polygon.

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    I am looking for someone able to create an autobuyer for the Sorare site, base on an average price, would be able to buy a card as soon as it is put on the market place and that meets certain conditions such as : the price is X% lower than average price, age, position, rarity, min grade, floor price and max price. Sorare is a fantasy Football game based on Ethereum Technology. API is in opensource available by GraphQL.

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    Se requiere una solucion que permita visualizar las operaciones de una wallet especifica de una blockchain basada en "Ethereum Parity" 1. Consultar y mostrar todas las transacciones de token seleccionado 2. Transaccion, Hash. Desde, Para, Comision de Red, Valor. Se dispone de repositorio de archivos con información referencia de la Blockchain. ---------------------------------------------------------------------------------------------------------------------------------------------------------------- A solution is required that allows visualizing the operations of a specific wallet of a blockchain based on "Ethereum Parity" 1. Check and show all the transactions of the selected token 2. Transaction, Hash. From, To, Network Commission, Value. ...

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    Use Ethracer to detect Event-ordering bugs and modify the source code of Ethracer to investigate branch coverage of the dynamic symbolic execution . Dataset contains front-running attacks in Ethereum history. Text me for details

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    Build a Website frontend 4 days left
    VERIFIED

    Looking for a website developer to build a website front end. It will consist of a few pages and a few basic functions. In the future it will be used as the front end to connect to the ethereum blockchain and other blockchains/dapps. Initially though I am looking for more of a landing page to showcase the front end and what potential functions that this website will able to do. This is so i can attract interest in my project then down the timeline i can take the next step in making the front end connect with the back end. The website i want built will be a combination of and I will detail what content i want on the website. The buttons and links on the front end dont have to work yet as discussed above this is just a display website initially

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    Looking for a Rust developer 4 days left
    VERIFIED

    We are looking for a Rust developer interested to work in a startup team! The team is building the new generation blockchain server with new cryptographically complex algorithms. If you are interested or have experience developing components for a real blockchain server code, you'll have an opportunity here. Responsibilities: - Modify Solana server codebase (Rust) - Get familiar with and ...(Rust) - Get familiar with and integrate 3rd party libraries with the Solana server codebase - Produce clean, maintainable, and testable code - Might lead junior and middle devs on the team Requirements: - Good hands-on experience with Rust - Knowledge of common data structures, e.g. trees, binary trees, Merkle-tree. Nice to have: - Experience writing smart contracts (for Solana, Algorand or ...

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    Hi I am developing a game on block chain. Need a very experienced blockchain developer for back end integration on Binance or ethereum

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    I have Ethereum smart contract. And I need mobile flutter app need to call method on contract. Flutter app must send transaction to mobile metamask wallet.

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    Our project has some success with NFTs (Ethereum). We have ERC721a NFTs that were minted, they generate ERC20 currency tokens, this combines to breed an ERC1155 item. If you don't answer the questions I don't accept your proposal. Next, the ERC115 and ERC20 combine to form another ERC721a family member. Finally we have multiple other scenarios combining above to form even more special characters. There are multiple collections and various transactions in this ecosystem, some community members do them right away at the same time if they have enough assets. Some of the traits on-chain metadata gets updated too. 1. Which of the above token types are you most and least familiar with, or are you good at problem-solving to figuring out any of them? 2. How can we combine som...

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    I need all this completed in 48 hours Max. REQUEST#1 My website works with Bit...user wallet using database..... But a freelancer i hired a week ago he disabled that feature while installing my api and now the BTC wallet only update wallet balance from api and not database i need this feature back on for database. ---------------------------------------- Request #3 ETH Wallet is generating Bitcoin Address for deposit which is not good. I want ETH Wallet to generate only ethereum Address for deposit with api. I also want ETH Wallet to allow balance updates from database not only api. ------------------------------------------- Request#4 Remove LTC Wallet, BNB wallet and LTCT Wallet from user dashboard, deposit page and Withdraw page. I only want BTC and ETH wallet to show on th...

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    I am finding Opensea and Javascript expert who can build Node.js script that buys NFT token on Opensea. Input: NFT collection address, token ID, token price (optional, if can get price from opensea, it is good) Output: buy NFT from Opensea, on Ethereum network Please type "nodejs script for auto buy" to show you are not bot. If you are expert on Opensea, please don't hesitate to place bid.

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    Hi , 1000 NFT's to be minted on Ethereum network. Images with metadata is ready. Need expert on etheruem platfrom to mint the NFT's at low price. Thanks

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    Need to create a simple web application to generate time stamps for any documents and create certificates for validation

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    I need you to create a contract to buy and sell in same block on ethereum. It should read the next block price and check for mev and do the transaction.

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    Create a layer 2 under the bnb chain ( like polygon) but no under ethereum. Consensus = pos + Coin. We will then have to develop our dex, bridge etc... (others payments)

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    Create a layer 2 under the bnb chain (fork like polygon) but no under ethereum. Consensus = pos

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    Planet Heroes NFT-this is this trip through the metaverse, based in Ethereum, you can freely travel through time and space, gaze in wonder upon the cyber landscape, and uncover exotic treasures. We need the employee to play, perform game quests, as well as look for all sorts of bugs of our developers so that real players do not meet them in the future Our website: Now we have a closed pre-launch beta testing of our game, all you need to do is just play, perform game quests, as well as look for all sorts of bugs of our developers so that real players do not meet them in the future, we pay a fixed monetary reward for the complete completion of the game as well as bonuses for each error found in the game metaverse. Before we start full cooperation, you need to

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    We require a web3 and solidity experienced developer to create an erc20 & bep20 token deployer that allows users to easily deployer their own cryptocurrency token on both eth and bsc, as well as the forthcoming pulsechain eth fork. Similar to what is on offer at The deployer will allow creators to use add a series of basic and advanced parameters. In addition to the token deployer, we also require a separate application that will work in tandem with the deployer that allows token creators to airdrop the newly created tokens to their communities via a claim feature. The claim feature details need to be discussed in further detail, however something like the ability to whitelist eth, bsc or pls addresses, perhaps via uploading an xml spreadsheet where users can enter their address ...

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    we need solidity developer to write and deploy a token factory to facilitate the minting of erc1155 using polygon or ethereum

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    Hello, I am looking for a developer for deploying the OpenDax/Openware Exchange on my AWS. OpenDAX is open-source. The deployment process should be simple and quick according to Opendax. There are tons of instructions on how to install and configure it. OpenDax Dow...installation manual: OpenDax installation video: Demo: Your tasks: - Complete and error-free installation of OpenDax on my AWS - Complete and error-free configuration of OpenDax - Blockchain Wallet Node configuration: Bitcoin, Litecoin, Tron and Ethereum The exchange has to be FULL operational. Including the SSL, Recaptcha etc. (all functions that the script has).

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    I am looking for blockchain and web developer who can create NFT minting website as well as create smart contract anf add the the nfts and metadata accordingly to IPFS. You will recieve 10% comission from collection sold out. I have ready NFT art and metadata created. Serious work only, if you can only please bid.

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    I am going to make a fantastic NFT Game Website on my own. Actually looking for a developer who ha...a problem in its logic. I'd like to have a wonderful game. Please send me your proposals if you are interested in my project. Do not waste my time. I hope to talk with only who has understood my project and got my game's general logic. Please write down your opinion about this game on your proposal or simply append the url or video of your similar project. removed by admins Required Skill: - Ethereum, Binance Smart Chain, NFT MarketPlace, Smart Contract, , - Javascript & Frontend Dev - AWS Lambda, React/Redux/(Typescript based) - Working with GitHub I will check all of proposals in 24 hours. Will share more details via chat and will start working immediately. Thank...

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    we want to create 3D NFT collection - for newspaper covers example: base image: script page: https://pacaviewer.fra1.cdn.di... script page: sending u now video of how it should look, just we want it clickable you needs to provide us with 1 link for the static image and 1 for the animation url You can see here how it eventually works Please let me know if you can do it

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    I have NFT market place already finished on Ethereum. But I want it to be on Multi Chain. If you have experience with it, apply

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    General Both Admin & Voters able to sign in Use online database to store data for admin & user 1 student only allow to join 1 club / society. Prefer to use Ethereum as block chain transaction . Only Admin need to pay full amount of gas fee for the voters to vote. Voter no need to pay any amount. Full souce code need to submitted at the end of the project. Use a separate independent website for this . ADMIN ROLES i) Admin can create / end multiple society’s election and create their position for election 2) Admin could set the particular date/ time frame for each society’s election. 3) Admin can create the positions for election of each society. 4) Admin can view election results 5) Admin can view the winner & their vote of the election of eac...

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    We have a coded contract deployed on the Ethereum network, we are facing constant issues with our current developer and need to find someone new.

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    Hello. I need o3swap duplicate. requirements: 1. swap tokens on ethereum, bsc, polygon chain. 2. bridge tokens.

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    A developer with experience with implementing full nodes for monitoring and handling transactions is required. Experience with Bitcoin Core required Experience with Ethereum Full Nodes (Geth, etc) required

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    Create a csv file with all Ethereum addresses that have 0.1 ETH or more out of all 200 million addresses. I don't know enough about etherscan to grasp what it takes in order to compose such a file, hence why I need the help. All I need is the file and that it is current, no scripts, queries etc (that would be a bonus). Thank you!

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    We are looking for a Blockchain Developer who will be responsible for designing, implementing, and supporting smart contracts on the Ethereum blockhain. Your primary responsibility will be analyzing requirements, designing smart contracts around our business model including a staking contract for our ERC-20 token.

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    ...Full Stack Development Posted 7 hours ago Worldwide We are looking for a Blockchain Developer who will be responsible for designing, implementing, and supporting smart contracts on the Ethereum blockhain. Your primary responsibility will be analyzing requirements, designing smart contracts around our business model including a staking contract for our ERC-20 token. As we are developing for a mobile-environment only (mobile dApp), it would be great if you also have development experience in mobile applications. Requirements: - Solidity smart contract development expertise and experience developing on Ethereum - Experience with Web3 tools and libraries like Truffle, Ganache, web3dart, Moralis - Familiar with common security issues in programming for blockchains - Good com...

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    ...design, develop, validate, deploy, and manage ML/RL systems ● Research and implement ML/RL algorithms and tools ● Pick appropriate data representation methods Your deliverable will be: ● Building a Uniswap SORA (smart order router agent) About us Deeplink is an Ethereum-based deep-learning protocol allowing blockchains to maintain On-chain Neural Networks while introducing programmability, machine learning and on-chain data science into blockchains. In addition, other Ethereum or EVM compatible chains and protocols can use on-chain neural networks and agents to improve efficiency, on-chain execution capabilities and security. We are true believers in the spirit of crypto and blockchain—of economic Freedom, where everyone should have...

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    HI I need python script which will generate ECR20 addresses with private keys from given strings. Strings will come from given dictionary. Output csv file: Address, PrivateKey, input string . TimeStamp as yyyyDDmmHHmmSSms. Output csv file should be with limit up to 50k records , if that amount is exceeded then save to another file , file name convention will be timestamp of file save.

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    Create a stable coin based on algorithm on Ethereum. Logic: - The base price of the token exchange rate vs the USD is (0.0009 $Token = $1USD) - The token is allow to have 25% volatility, therefore it will have a min price limit value of which it can drop to and a max price limit value of which it can increase to. - The max price holders can sell their Token for is (0.0012 $Token = $1USD) - The min price holders can sell their Token for is (0.0006 $Token = $1USD)

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    ...Developers Experience: 4 – 8 Yrs Period of Engagement: 3 – 4 Months Job Profile: • 4-8 years of experience as an Application developer using NodeJS / AngularJS / Typescript /Advanced Java developer/Spring Boot JOB PROFILE ( C2H for 3/4 months) • Hands-on Blockchain Experience (Network setup and Smart contract development with integration APIs development) with either Hyperledger Fabric/Ethereum mandatory. • Expertise in REST API/Microservices Development with Springboot, etc Frameworks, knowledge of OATH2.0 • Proficient in no-SQL databases (MongoDB, Couch, Cassandra), OpenAPI specification (swagger), docker, Kubernetes, Openshift, Contenarization technology • Experience in writing smart contracts for large scale ...

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    I'm looking for a VR app which can showcase various blockchain models (Bitcoin, Ethereum, etc) and its case studies. It is to be made like a learning experience where people can use VR to visualise working of the blockchain. Similar to a virtual interactive classroom. Working models of the app: Showing different doors based on the number of blockchains -> each door shows a series of history of blockchain, its history and how it is created. Or choosing to view case studies or selecting a door to practise public speaking.

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    A configured and functional blockchain infrastructure based on Ethereum, demonstrates the traceability of transactions , exchanging points between actors . NOTICE : - I will give you the source codes of a project already made with the same recommendations. - you can simply fix, modify the design and then make it work. - I will give you access to a VPS on which you should do the work. - The project is not commercial, but academic so the privacy aspect does not matter. PRICE :300$

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    Hi, I am looking for a web3 dev to build a based landing page. will provide the contract. Will provide the Figma files following these steps: CONNECT TO THE ETHEREUM NETWORK ● CREATE APP (AND API KEY) ● Will provide an ETH address ● ADD ETHER FROM A FAUCET ● INITIALIZE OUR PROJECT ● CREATE HARDHAT PROJECT ● ADD PROJECT FOLDERS ● USE contract provided ● CONNECT METAMASK & ALCHEMY T ● INSTALL ● UPDATE ● COMPILE CONTRACT ● WRITE OUR DEPLOY SCRIPT ● DEPLOY OUR CONTRACT Looking for a long-term working relationship. Regards

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    I want someone to create a spreadsheet that shows the top 1000 biggest companies globally including there internet URL and then check to see their Etherium Dan name has been registered (example: ) Example (if it exists, BLANK if it has not been registered)

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    As the title, I suspect this would be a giant script, that would run for days, but the final result should be a csv file with all addresses containing 0.1 ETH or more.

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    1. The original contract included a "redemption" function and phase, where, after all tokens/tickets would have been purchased, participants would be required to submit their tickets or sell them to other participants. All of this is rather convoluted and needs to be removed, and the contract's logic simplified to optimize gas fees. This would require some cursory analysis of the code, likely taking no more than 10 minutes. It could also be rewritten entirely, the original code used as a framework. 2. A few programmers I've spoken to have confirmed that the ERC1155 standard could be used to facilitate affiliate marketing through promo codes. It would work as such: there are two classes of tokens, one being the tickets, and the other being promo codes, which participants...

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    Hi Andrei Z., I noticed your profile and would like to ask how much it would cost to query all ethereum wallet addresses with ballance 0.1 eth or more and save into a csv file, like a huge, current database. The googleapi's storage is unaccurate. I understand that this query would run for days to complete but if it's possible, please contact me for a project, thank you. PS: I've put the hours to a minimum so I can get this message across, I would obviously pay a proper fee if you agree. Cheers!

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    We are looking for a dev with experience in web development, Ethereum blockchain and smart contract development. We require a dev that can: - Create a minting page - Create a smart contract for the nfts - Upload nft art ( IPFS) any anything that may need done to launch the project If the launch/minting process is smooth and done on time a bonus will be given

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    NDA
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    Required Details: I was making a decentralized order book crypto exchange on Ethereum virtual machine blockchains. I've already written the whitepaper but I need it professionally worded, designed, and with a good layout, to persuade investors and make it look professional. If you're a professional writer and have a crypto/business writing background, and know how to present a whitepaper. Bid me an offer, I'll text you if I feel like you're good for the job.

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    i was making a decentralized orderbook crypto exchange on ethereum virtual machine blockchains. I've already written the whitepaper but I need it professionally worded, designed, and with a good layout, to persuade investors and make it look professional. If you're a professional writer and have a crypto/business writing background, and know how to present a whitepaper. Bid me an offer, I'll text you if I feel like you're good for the job.

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    Hello, Everyone. I am a project manager in our startup of Crypto Project. We are going to develop in Ethereum Virtual Machine Defi projects for Our startup. So we need Defi engineer to work for our team. No junior or auto bid. Please quote "I am a senior Blockchain developer on top of your post". If not, your bid will be rejected. Good luck.

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