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    3,170 solidity công việc được tìm thấy, giá theo USD

    ...viết code bằng ngôn ngữ lập trình Sodility. 3. Có hiểu biết và kinh nghiệm trong phương thức lập trình TDD (Test-Driven Development) 4. Có hiểu biết rộng về công nghệ Blockchain, đặc biệt là Ethereum. 5. Quen thuộc với những lỗ hổng thông thường trong Hợp đồng thông minh (Smart Contract) ----------------------------- Yêu cầu: 1. Thiết kế, xây dựng ứng dụng phi tập trung bằng ngôn ngữ lập trình Solidity 2. Viết các tư liệu hướng dẫn liên quan và hỗ trợ kĩ thuật cho team. 3. Kiểm soát chất lượng và các lỗ hổng bảo mật, các đoạn mã code trong hợp đồng thông minh. 4. Tìm kiếm, nghiên cứu các giao thức sử dụng...

    $500 (Avg Bid)
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    Need dev has experience on developing smart contracts in Solidity. Location HCM city, VN.

    $780 (Avg Bid)
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    Hello, im looking for solidity dev. What I need: -Token contract(simple contract only with tax for buy/sell) -Jackpot contract + website to manage it How jackpot should work: -Players deposit our token(in contract should be min. and max contribution variable to set and max players at once, and max overall stake) -Every player have chances to win. More he deposit, more ticekts he get, soo he have higher chances -Jackpot round start when the overall stake is full or when reach maximum numbers of players for round, or after 2mins from second bet(soo if there is only one player jackpot wont start) After game winner takes all minus tax On website should be button to connect wallet, deposit button, player profile(last games, win games etc) in profile there should be option to set avatar ...

    $1522 (Avg Bid)
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    Hello, im looking for solidity dev. What I need: -Token contract(simple contract only with tax for buy/sell) -Jackpot contract + website to manage it How jackpot should work: -Players deposit our token(in contract should be min. and max contribution variable to set and max players at once, and max overall stake)

    $250 - $250
    $250 - $250
    0 lượt đặt giá

    Hello, im looking for solidity dev. What I need: -Token contract(simple contract only with tax for buy/sell) -Jackpot contract + website to manage it How jackpot should work: -Players deposit our token(in contract should be min. and max contribution variable to set and max players at once, and max overall stake) -Every player have chances to win. More he deposit, more ticekts he get, soo he have higher chances -Jackpot round start when the overall stake is full or when reach maximum numbers of players for round, or after 2mins from second bet(soo if there is only one player jackpot wont start) After game winner takes all minus tax On website should be button to connect wallet, deposit button, player profile(last games, win games etc) in profile there should be option to set avatar...

    $250 (Avg Bid)
    $250 Giá đặt trung bình
    1 lượt đặt giá

    First of all I am a developer and know solidity and lot of experience in blockchain domain. Only apply if you know what you are talking about and confident you are an expert. If you know what you are doing, its two hour job, max 3 hours I have cloned a DAO voting platform in ETH chain You have to integrate 4 new screens to the DAA I already developed. DAO voting works. New screens are ready. You just have to integrate new screens to the old UI. There is no new development, no debugging or any complicated work. You also have to change the LINK token for voting power to the PRVT token which is attached. DAO is already working in eth chain. DAO token is LINK NOW, NEED TO CHANGE TO our token PRVT NEW screens -

    $21 / hr (Avg Bid)
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    Solidity Contract testing & Fixing 5 ngày left
    ĐÃ XÁC THỰC

    I need someone to fix a few issues in a solidity contract. It will be on the Etherium network, but I have been testing on testnet. Transfering of tokens does not show up in users wallet (reduces owners amount and sends but does not show in users Wallet Create a test Liquidity Pool for the token to test the tax with buy and sell ( I need to have access to this) Airdrop feature needs fixing - should send a desired amount ie 1,000,000 / all holders - to all holders wallets Tested so far and working Burn - sends to dead wallet and reduces supply - works SetBuy Tax - works SetSell Tax - works GetSell Tax - works GetBuy Tax - works burn amount set to remove decimals - works get burn amount set to remove deicmals - works set tax off and on - works Get tax status true or false -...

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    I want to call localhost APIs from solidity smart contract. Local APIs such as: GET list: http://localhost:3001/api/locations POST: http://localhost:3001/api/person/ ... DELETE: http://localhost:3001/api/city/id If you want to use Oracle Blockchain then it must be free not paid service. You explain all steps to do that from my side, if there are problems, then you can access to my system using Team Viewer for example. Thanks,

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    Looking for someone who can teach me web3py and solidity I already know solidity and basics looking for advanced

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    Most of work will be in Node, mongodb, typescript, express, MySQL, Solidity, ethereum, third-party APIs. Other technology will be plus like Laravel (php), Python, cloud server. Majority of projects will be related to blockchain so lot of learning opportunities there too. Please mention monthly salary in INR you looking for? We can have interview for suitable candidates.

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    Hello I need a website developer who has more than 5+ years of personal and industrial experience. The site needs multiple technologies including Javascript, Python, Django, Node.js, PHP, Laravel, Solidity, Ethereum, AWS, and more. Thank you Regards.

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    We are a software development company based out of India . We have more that 5+ years of personal and industrial experience with working with clients across various industries . Our resources are highly skilled with working with multiple technologies including Java ,React Native,Ionic, Javascript , Python , Django , Node.js, PHP, Laravel , Solidity , Ethereum , React.js, Swift, Objective C, Kotlin , AWS and more. We are looking to connect with a motivated and driven individuals who can work with us on a revenue sharing or commission model . Our team of expert developers would be developing and executing your client's requirements and you can keep earning on every project. We provide services like - WEBSITE DEVELOPMENT ; MOBILE APP DEVELOPMENT ; CYBERSECURITY ; GAME DEVELOPM...

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    We need to achieve 100% branch coverage with the coverage test of the solidity-coverage tool. I will provide more info to selected candidate.

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    Here is the tokenomics... It should be a fee token. Name: Montay Solar Token Symbol: MTST Total Fee: 10% Auto liquidity fee: 4% Redistribution: 4% Charity fee: 1% Burn: 1% Token holders will get rewards from the redistribution. But the reward token will be different. It should be BUSD. This token will be used for marketing and staking, etc. Please apply who can create this token. Thank you.

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    i need solidity and react js devloper for some api integration

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    BLock Chain Coding Đã kết thúc left

    Requirement is to write Solidity code to exploit a vulnerable smart contract, using the Goerli Testnet in Ethereum. This is not real Crypto coin. More details in chat

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    ...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...

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    STEEM SMART CONTRACTS Đã kết thúc left

    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

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    Blockchain supply chain Đã kết thúc left

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

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    Web 3.0 Blockchain game - Unity Đã kết thúc left

    Hello We are looking for individual freelancer (Not agent - Not a company) who will be able to work under our control and review, for a blockchain gaming project. The freelancer must have excellent knowledge of solidity and smart contracts, knowledge in blockchain networks like XRP and ADA. Below we are attaching the concept of the project. Please reach back only once you review the file and only if you are ready to follow our budgets and our requirements.

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    Hello freelancers, We're looking for a skilled team & individual who can: 1. Complete code refactoring in Solidity, Make a few adjustments to an Ethereum smart contract using Solidity. 2. Integrate (wallet) with 2 WordPress front end (2 sites). 3. Add new special accounts & create a few more conditions. Deadline - we're ready to start as soon as possible once we find the right candidate and the right quote. Skills required: Blockchain, Solidity, ETH, WordPress, React. We have all the information, guidelines & instructions in regards to the project scope available, place a bid if you're interested. More information will be provided via chat. Thanks,

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    The Vitwi Đã kết thúc left

    Hola, Actualmente estoy buscando un programador en C++, Javascript, php, solidity o cualquier lenguaje que sea posible vincular con web, blockchain para un idea de negocio web. Busco asociarme con uno o dos programadores para desarrollar la idea, antes de explicarla solicito firma de NDA, cualquier cosa podemos comunicaros conmigo y vamos hablando Busco principalmente de BCN por si fuera necesario realizar visitas personales. Saludos

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    looking for a smart contract developer who can deploy the contracts for solidity flash loans on aave and also deploy a arbitrage bot for successful execution of the arbitrage

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    Solidity Developer Đã kết thúc left

    Contract required for Pair with WETH Airdrop to holders Burn from total supply, must be a burnable contract effecting total supply Tax Marketing Wallet - amount changeable will be 1.5% NFT Fund Wallet - amount changeable will be 8% Exclude from fees Set Marketing Wallet Set NFT fund wallet UniswapV2Pair - changable UniswapV2Router - changable Change token name, total supply, ticker from inside code. Read total supply Exclude from fees

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    Gấp
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    Skill needed: FLUENT in Bengali Language [must] Language: React.Js Typescript Solidity Smart contract NFT

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    This is a react project where a user will be able to mint NFTs using multiple ERC20 tokens. The issue is specifically related to an existing react project. This project is suitable for people who are knowledgeable in the following: 1) React, 2) Solidity 3) Blockchain 4) Javascript 5) Metamask

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    Solidity Smart Contract Đã kết thúc left

    Developing a Decentralized Applications (DApps) incorporating the features of smart contracts in blockchain In this task, you will develop a decentralized application with required smart contract(s) and deploy it on blockchain. You also need to create necessary front-end interfaces (as applicable) to interact with the deployed smart contract(s). The application allows a number of friends (maximum 10 and minimum 3) to start a new company. All of the friends must contribute an equal percentage of investment for the company and one of them becomes the manager of the company. Whenever the manager of the company needs any thing to purchase for the company, he requires the approval from his friends. If the manager receives the positive approval from at least 50% (of the total number of friends),...

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    Solidity contract audit Đã kết thúc left

    I need a contract audited urgently

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    We are a software development agency looking to scale up our Free...benefits more than hourly wage We're looking for someone who could take on lead generation and write job proposals. The ideal candidate should have 3+ years of experience as a lead gen expert and have experience with any Freelancer platform bidding on clients' behalf. Has to have software development understanding to be able to find jobs that fit our tech stack and expertise. - Smartcontract: Rust, Solidity, Hardhat, Truffle - Backend: NodeJS, Python, AWS, MongoDB, MySQL - Frontend: ReactJS, NextJS, EtherJS - Mobile: React Native, Flutter - Server: Ubuntu, Centos, AMI, ... Must be fluent in English and do the work in any timezone working are a software development agency looking to scale up our Freelan...

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    1 to 1 Rust Training Đã kết thúc left

    We have 1 programmer to retrain from C++ to Rust. Need a person to pair up for 4 wks , 4hrs per day to train on Rust. Working on a real world example to hook up a Trading UI using Rust (graphql and others) Experience on Ethereum useful with invocation of Smart contracts abi for solidity.

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    Solidity Smart Contract Đã kết thúc left

    I am searching for a solidity developer - contributing to a smart contract project.

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    ...coin within either Ethereum or Cardano blockchain for which we are looking for a two Blockchain Engineers to come on board. Requested Profile: You have completed a university degree, for example in Computer Science, Econometrics, Biology; You are obsessed with blockchain technology and would like to be able to work with it professionally; You have experience with C++, R, Python, Matlab, Tableau, Solidity, Hyperlegder, Stellar, Ripple (at least a few); You have good communication skills and you can work well together; You are willing to continuously train yourself; You speak Dutch and you also master the English language in word and writing; You breathe IT and you have the ambition to stay in this corner. * High-Tech features * Whitepaper Writing * Involvement of latest techs &...

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    I'm looking to create a BEP20 token with specific Tokenomics and rules in the smart contract. I just need help to create the smart contract. Someone with experience in Solidity/Python needed. Ideally you have created smart contracts before and understand Web 3.0.

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    Make a few adjustments to an Ethereum smart contract using Solidity. Integrate it with 2 WordPress front end (2 sites). The project will be done in 3 parts according to a detailed brief. The project must be done ASAP. (20 days at the most) First part 3 to 4 days Second part – 5 to 8 days Third part – 5 to 8 days

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    I need a senior blockchain developer with strong ReactJs, Web3Js and Solidity experience to build an enterprise dapp. The developer must have strong experience in React.js Solidity TypeScript REST API

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    Need to add Mint Button for NFT Đã kết thúc left

    The website is in React. Its NFT website and need to add MINT button from site feature. MINT button should have contract which can be used in opensea. A web3 and solidity expert needed who can co-ordinate with our web developers guiding and suggesting them to complete this task. We have other project that is long term. If you are good we can extend contract to a long term and more pay.

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    Hormiga Dapp Đã kết thúc left

    Necesitamos de manera urgente programador con experiencia en Solidity para: Crear smart contract erc721 que ejecute tres transferencias al momento de ser creado y tres más al momento de llegar a la address especificada por el creador del token(los address deben estar encapsulados de manera invisible a los tenedores del NFT). El pago es de 500 Usd + 1 millon de token erc20 del proyecto Hormiga es un proyecto muy interesante, pueden obtener mas informacion en

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    I urgently need this portion of our project done. We need to integrate Winter Wallet () into our Website. -Our challenge is deploying the appropriate ERC721 Smart Contract. -It needs to be deployed to Goerli and must have a Goerli Smart Contract Address. -This will be a "blind mint" (or what calls a "candy machin..."Mint" button in the attached image. You can see the low-code project dashboard at or by looking at the attached images. The integration is fairly simple and says it can be done in minutes, but this is not my area of expertise. Documentation can be found at: This must be done quickly and correctly. Thank you Tags: Solidity, Smart Contracts, Web3, Eth, Winter Wallet, Goerli

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    Hello, freelancers., My project is complex . so I need very experienced developer. I will provide project requirement in private chatting if someone have nft , cryptocurrency, solidity and airtable , please bid thanks

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    Nổi bật Gấp
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    Objectives: A plain (unstyled) webpage with an ERC-20 token faucet (written in Solidity and deployed on Avalanche blockchain). The minted token and webpage are to be integrated and tested with existing website. Tasks 1) Mint ERC-20 token on Avalanche Fuji Chain (test) and then C-Chain (production). Test with Metamask wallet. - properties: - Token Name: CryptoCarnival - Volume minted: 350,000,000 - Can mint more tokens after launch 2) Create a simple html & JS faucet webpage. Test with existing JS wallet on website. - properties: - Max token per day per wallet: 10 - Max tokens per day (total): 10,000

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    I am facing problem Fail with error 'BEP20: transfer amount exceeds allowance' Please anyone can help me.

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    Hi, let me know if you can develop a smart contract that uses a chainlink external ada...Smart contract will have 3 numbers/ID and we randomly select one number/ID and send an API call (UPI ) to request payment collection from the other two phone numbers/ID. Then the program will check the API status if payment is made and record it. This Smart contract can run from the web IDE itself and does not need any front end The requirement/skills to complete this project 1)Smart Contract (Solidity) 2)Understand how blockchain oracle(chainlink /airnode) 3)UPI API (Indian payment framework) This is just a sample demo project and only has a 100$ SGD budget, if this is all okay, a real project will be bigger. Please let me know if you are okay so I can create a milestone and allocate fun...

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    Looking for someone that can build an automated bot that arbitrages across a couple of DEX'es automatically when the opportunity exists to arbitrage. (need to be able to setup multiple different assets to watch for arbitrage opportunities and execute). Must be proficient in both solidity and python. Must have completed similar task before.

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    Split large smart contract 1 Đã kết thúc left

    Hello. I have two smart contract files but they are bigger than 24KB. So I am going to split them into 2 or 3 files so that each one can be smaller than 24KB. If you can do this, please feel free to bid this project. This is easy work for you if you are a solidity expert. Thanks (Please check attached files, too)

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    Split large smart contract Đã kết thúc left

    Hello. I have two smart contract files but they are bigger than 24KB. So I am going to split them into 2 or 3 files so that each one can be smaller than 24KB. If you can do this, please feel free to bid this project. This is easy work for you if you are a solidity expert. Thanks (Please check attached files, too)

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    Web3 integration for payment Đã kết thúc left

    - When users sign up, create their accounts - Deposit and Withdraw, transfer tokens using Smart Contract(Smart Contract using Solidity language and Truffle, Hardhat tools) - Web3 wallet connection and deposit/withdraw Here's what to do here: Ability to deposit/withdraw USDT coin Activating TRC20 and BEP20 networks The USDTs received will be integrated to be used to buy the inside package and earn rewards. My project: We will integrate it into this project 10 days

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    NDA
    $500 Giá đặt trung bình
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    Web3 developer Đã kết thúc left

    ...Smart Contracts development Bachelor degree or above in computer science or engineering Good understanding of Ethereum and Solidity Realized projects in Solidity or other DLTs Experience with at least one of the following programming languages: Java, Nodejs, Python, Golang, Rust Strong desire to learn about the latest Blockchain technologies and products Strong knowledge of DEFI trading in general & flashbots in particular Good communication and expression skills in English. A team player with solid execution ability. 1+ years experience architecting or developing for blockchain/DeFi projects, white hat hacking, or bug hunting 1+ years experience working with Solidity and Web3 tools (Hardhat, Truffle, etc.)...

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    We are building an NFT-based staking game on the Ethereum blockchain. We need a solidity developer who has proven experience building reward systems. We have the NFTs live already, with a staking contract. We need a front end that enables users to interact with various contracts (more details will be provided). We require gas efficient and otherwise optimized smart contracts. We are hopeful this project will allow us to get additional funding for greater functionality build-out and subsequent projects. The quality of your work will directly impact this. Need Experience with: ・Metamask wallet integrations ・Dapps ・Staking mechanics ・Raffle ・Frontend (React / Java )

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