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Rating is 4.6 out of 5.
4.6/5
based on 456 client reviews
  2. Development & IT Talent
  3. Full Stack Developers
  4. (Current) web3.js Freelancers
  • $65 hourly

    • 5.0/5
    • (35 jobs)
    I have been an IT engineer for more than 12 years, including the Backend part, Database optimization, Server setup, WEB3, DevOps, custom blockchain development, and API of other Services. Have experience in developing projects from the very start in JavaScript, Golang, Rust, C++, Dart, Erlang, and Solidity. I am highly responsible for my work, punctual, and attentive to little details. I like complex tasks to do and finding nonlinear decisions. I was part of a team of such big projects as: - Elrond (EGLD) : Launch of IEO, development of a sharding system; - Crypto wallet Bread (BRD) : Development and audit of payment gateways; - CoinPayments : Development of payment gateways and storage of cryptocurrency funds. By working with me, you can be sure of the stable functioning of your application. Listed below are my experience and skills. – JavaScript (ReactJS, NodeJS, ECMAScript); – WebAssembly; – C++; – Rust; – Solidity; – Erlang; – Dart; – Golang. – GraphQL; – PostgreSQL; – LevelDB; – RocksDB. – PlayCanvas; – WebXR. – Blockchain Protocols; – Copy trading protocols and architecture; – Smart Contract Audit; – Exchange development (CEX); – Decentralized exchange development (DEX); – Arbitrage and Trading bots development; – ICO/IDO/IBCO/LBP/IFO; – Flash loans bots; – Front-running, snipe, and sandwich bots; – Wallet (flutter) development configuration; – TradingView configuration; – Meta; – Metaverse; – DeFi; – NFT; – GameFi. I've worked with the following services: – AWS (EC2, ELB, ASG, RDS, ElastiCache, S3); – AWS Serverless Fundamentals (Lambda, DynamoDB, Cognito, API Gateway); – Monitor, Trace and Audit your microservices using CloudWatch, X-Ray, and CloudTrail; – Linux, AWS, Bash & Python Scripting, Jenkins, Ansible, Docker, Kubernetes, Cloudformation, Terraform; – Sentry; – Pingdom; – Supervisor; – uWSGI; – Vagrant; – Git, CLI; – Ansible; – Apache; – Datadog; – Docker, Docker Compose; – Gunicorn; – Nginx. – CCXT; – OpenDAX; – OpenZeppelin Truffle; – MetaMask; – Ganache; – Remix IDE; – Geth; – Parity; – Web3.js – Ethers.js; – Infura; – Embark; – Brownie; – Alchemy; – Drizzle. – Bitcoin; – Lightning Network; – Ethereum Smart Contracts(ERC-20, ERC-721, ERC-223, ERC-777, ERC-1155, ERC-1337, ERC-3643 (ex-T-REX) and the ERC-1400); – Binance Smart Chain (BNB); – Cardano (ADA); – Solana (SOL); – Avalanche (AVAX); – Terra (LUNA); – Polkadot (DOT); – Polygon (MATIC); – Cosmos (ATOM); – Chainlink (LINK); – NEAR Protocol (NEAR); – Uniswap (UNI); – TRON (TRX); – Decentraland (MANA); – PancakeSwap (CAKE); – Toncoin (TON).
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Golang
    React
    JavaScript
    Blockchain
    Solidity
    Blockchain, NFT & Cryptocurrency
    Smart Contract
    Ethereum
    Blockchain Development
    Blockchain Security
    Bitcoin
    Web3
    Network Architecture
    Blockchain Architecture
  • $55 hourly

    • 5.0/5
    • (18 jobs)
    ✅ 6+ Years of Experience ✅ 2950+ hrs on Upwork ✅ dApps 👋 I'm Frontend (React.js | Web3.js | Ethers.js | Alpine.js | JavaScript) developer, which could build interactive experiences for web application and solve challenging problems that occur. Also, specialize in high performance modern frontend solutions with API integrations, Web3. Good in developing responsible layouts from scratch using modern technologies such as HTML5, CSS3 and user interface using vanilla JS (ES5+), popular js libraries and JavaScript framework (React), managed CRM creating process. The stack: ✢ Vanilla JS(ES5/ES6+) / React.JS + Mobx + JSX / Alpine.JS; ✢ Node.js, experience of deploying sites on the NodeJS server; ✢ JSON, AJAX, API; ✢ Gulp (created own and permanently update it) / Webpack; ✢ HTML5, Pug / jade template languages; ✢ CSS3, CSS preprocessors (SASS (mixins), Less, Stylus); ✢ MaterialUI / Bootstrap / Tailwind / Bulma; ✢ Customize charts libs (echarts.js, google charts, .etc); ✢ Customize google maps (worked with key for api and modified different maps). ✢ SVG animations (css/js); ✢ BEM-, atomic-methodology; ✢ Cross-browser compatibility (Edge, Safari, Chrome, Firefox, etc.); ✢ Responsiveness / Mobile-first development / Pixel-perfect development; ✢ Git; ✢ Task-management tools (Trello, Jira); ✢ Developer tools and version control; ✢ dApps: DeFI / PlayToEarn / Metaverse / MetaProjects / Staking / Airdrop; ✢ Custom Websites Development; ✢ CMS development; ✢ Telegram bot development; ✢ Booking system development; ✢ Learning system development. 🌎 Feel free to ask me any questions :) Hourly rate we may discuss. You may propose me your rate, write me. Some reviews about my work: -------- "Highly recommend Dima as professional developer, specialising in high performance modern frontend solutions with API integrations, Web3. Best of all he always ready to learn something new and never limits himself." "Exceptional frontend developer. Dmitry has shown deep understanding of Web3 front end and everything related to smart contracts. He has successfully and very quickly completed all of the complex tasks. Will definitely work with Dmitry more and highly recommend him as a professional." "Dmitry was great at working to the brief I had set and was very responsive with extra questions and additional work. Thanks for doing such a great job Dmitry, look forward to working together again in the future." "Dmitry is a seasoned professional in web3 frontend. He has delivered everything extremely fast with exceptional quality. We highly recommend his professional skills and will definitely hire again!" --------
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Front-End Development
    Website
    Tailwind CSS
    Websockets
    DApps
    Blockchain, NFT & Cryptocurrency
    TypeScript
    JSON
    API
    JavaScript
    Mobx
    Redux
    React
    Next.js
  • $70 hourly

    • 5.0/5
    • (91 jobs)
    🌟 Upwork Awards: Best Freelancer 2020 for Web, Mobile & Software Development 🌟 I've been creating websites and apps with complex 3D technologies for more than 7 years. Please check out my portfolio and reviews here on Upwork. 🟢 Here are 8 areas I will help you with: 1. Wow-websites and landings with 3D effects and animations for your company or product presentation. 2. 3D visualization of goods and equipment on your website. (Inc. photorealistic 3D modeling) 3. 3D Configurators (for choosing the shape, color, the material of the product and see it in 3D on your website) 4. Websites presenting real estate in 3D. (3D-visualization of buildings and territories, any development projects) 5. Projects with Augmented Reality (AR) and Virtual Reality (VR). 6. Browser 3D online games and interactive gamification projects. 7. MetaVerse, Play2Earn Unreal Engine 5 games. 8. BlockChain Development, NFT, DApps, Marketplaces. 🟢 Why me? 1. Communication comfort guaranteed. 24/7 online. And it's OK if you are far from the technical knowledge and terms. 2. I've been working in this field for 7 years and have an impressive portfolio and experience. 3. I've created a Team that allows me to combine development, design, and management skills to implement and support projects of any complexity. 4. Great management. We use Agile and SCRUM methods. 5. Be sure that all ideas and commercial info will not be exposed. We are always signing NDA. 6. More than 5 years on UpWork - EXPERT-VETTED, 4k logged hours and $200k+ 🟢 Skills Three.js (threejs) | WebGl | 8th Wall | AR | VR | Babylon.js | PlayCanvas | UnrealEngine 5 JavaScript | Typescript | React | React Hooks | Redux | React Native Next.JS | WordPress | Node.js | Nest.js Solidity | Rust | Web3.js ( WEB3 ) | NFT Minting Css Frameworks ( Material UI | Ant design | Styled Components ) Databases ( MongoDB | Firebase | PostgreSQL ) DJI SDK Google Map API Amazon Expert ( EC2, S3 ) | Digital Ocean | CI/CD ( GitLab, GitHub ) 📗 Thank you for reading to the end! Please feel free to write to me. I always respond quickly here on the Upwork. Briefly describe your problem or idea in your own words, and I will offer the best solution. We can also take a video call to discuss your project.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Babylon.js
    Unreal Engine
    Web3
    Canvas
    AR & VR
    Computer Graphics
    WebGL
    Three.js
    React
    React Native
    Augmented Reality
    3D Rendering
    Node.js
    JavaScript
  • $30 hourly

    • 5.0/5
    • (25 jobs)
    Over 7+ years of professional experience in Python and JavaScript/React development. Experienced with: - Blockchain - Web3.js - Python / Django - Javascript - React.js - NEXT.JS - MongoDB - Material UI - Figma to React - AWS - NODE.js - Express.js - Html, CSS - PostgreSQL,MongoDB and MySQL - Linux and Docker - GIT
    vsuc_fltilesrefresh_TrophyIcon web3.js
    MERN Stack
    DApps
    Blockchain, NFT & Cryptocurrency
    HTML
    TypeScript
    JavaScript
    Front-End Development
    Node.js
    Next.js
    React
    Landing Page
    Python
    Django
    Web Application
  • $35 hourly

    • 5.0/5
    • (48 jobs)
    Knowledge with web developer, I started work with JavaScript in 2015 I really interesting in your ecosystem with your frameworks like React, React Native, and NodeJs. Also, I am skilled in Blockchain development, Python and PHP back end applications. - React, Node, Javascript, Typescript HTML, CSS - Blockchain development, web3.js, ethers.js, solidity - PHP, Python, and frameworks - Electron, React Native - Puppeteer, Selenium, Google App Studio.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Web Crawling
    Machine Learning
    Data Scraping
    Blockchain Development
    Ethereum
    React Native
    Website
    Python
    PHP
    React
    Node.js
    JavaScript
  • $185 hourly

    • 5.0/5
    • (42 jobs)
    I am a California based NFT smart contract developer/web3-DApp developer/NFT consultant/advisor and have successfully launched over 10 NFT projects for my clients. I have provided consultation for over 20 NFT clients too. I have also worked on my own 10k generative ERC721 NFT art project. I was involved in every aspect of the NFT project from start to finish including contract development, twitter/discord marketing, generating the 10k art illustration, uploading images to IPFS, website design, integrating web3 for website minting, etc. I look forward to hearing from you and learning more about your project! Eugene
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Blockchain
    Ethereum
    Front-End Development
    Blockchain Development
    Website
    Web Design
    Cryptocurrency
    DApps
    Smart Contract
    Solidity
    Web Development
    JavaScript
    React
  • $20 hourly

    • 4.7/5
    • (58 jobs)
    I'm a full-stack developer and I manage a professional web and mobile development agency. I lead a team of 15 expert front and back-end developers. Over the years I have developed applications for investment professionals, eCommerce, Ticketing Industry, Web Security, Social Networks, Machine Learning, Chatbots, Automation Tools, Browser Extensions as well as Mobile Apps. Our strengths are: - React JS and React Native - Solidity and Blockchain Technologies - Node, Electron, Angular, Jquery, Chrome Extensions and all JS Technologies - Python, Django, Selenium, Machine Learning, Chatbots - Automation and Scraping Tools (Socket based as well as browser based) - PHP, Laravel, CodeIgniter, WordPress - C# with MVC and WebForms - Front End Technologies like HTML, Javascript, CSS - Servers like AWS and Azure
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Blockchain Architecture
    Ethereum
    Automation
    Blockchain
    Angular
    Python
    .NET Framework
    Google Chrome Extension
    JavaScript
    PHP
    Node.js
    React
    ExpressJS
    C#
  • $25 hourly

    • 4.8/5
    • (716 jobs)
    I am Amit Kumar; an Identity Verified and Top Rated plus freelancer on Upwork with 10 years of experience in development and designing. I have done my 4 years bachelor's degree in Computer Science and during my degree, I studied many skills. During my education, I started my practical sessions in working on skills to get actual knowledge of how they help in the marketplace. Now I am having 10 years of experience in this industry, having completed 13000+ hours and 700+ contracts and have achieved a lot of success in helping out my customers for their small, medium and large-scale projects. I usually get the knowledge of the customer's concept for business or dreams and implement my skills to make those dreams in reality. I am expert in Data Science field. I am quite passionate about natural language processing (a field of AI) and has worked in fields such as text-based sentimental analysis, movies reviews, keyword suggestion from the text or PDF. Along with that I have also integrated NLP with keras or tensorflow model and have widely used vanilla networks such as convolution neural networks, recurrent neural networks, and hidden Markov chain. I have been indulged in the following technologies from a quite long time: 1.) Natural language toolkit 2.) Gensim and Word2Vec 3.) Pandas for data manipulation 4.) A vanilla network such as CNN for image classification 5.) Recurrent Neural Network for time series prediction 6.) Emotion prediction using natural language processing 7.) Language and semantic-based similarity word embedding 8.) Google cloud platform, docker and kubernetes My general skills: PHP, Codeigniter, Laravel, Wordpress, MySQL, Progressive web application, Ionic Framework, Django, Prestashop, Shopify, Shopify Plus, Squarespace, Weebly, Bitrix24, JQuery, JavaScript, Third-party API Integration, Payment method integration, HTML, HTML5, Vue.JS, Bootstrap, CSS3, JQuery, JavaScript, React, Angular.JS, Adobe Photoshop, Illustrator, API development Database: MySQL, Mongo, Redis. Tools use for Project Management: Git, Jira, Slack, Asana, Trello. I always work with Upwork Rules and Regulations for getting paid i.e on the basis of Hourly and Fixed Price Projects. Time Zone: I am flexible to work on any time zones. Thank you for reviewing my profile and consideration. Lets discuss your project need and collaborate together to achieve your business goals. Don't Look into my current Active Jobs, I have most of the jobs which need help on timely basis i.e. some jobs need help once in a month, some required twice in a month or some require help once in 3 months. So, I am ready to help you with your Full time Project.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Solidity
    Blockchain
    On-Page SEO
    Wordpress Thrive Themes
    Next.js
    API Integration
    Reputation Management
    Laravel
    Website Migration
    Liquid
    WordPress
    Web Design
    Shopify
    Business with 100-999 Employees
  • $65 hourly

    • 4.6/5
    • (44 jobs)
    Not only is development my chosen career, but it's also my hobby and passion. I look forward to every new project and treat it with the utmost dedication. New technologies coupled with years of experience have set me up to be quite competent and timely. 1. Front-End Development - Svelte, Svelte NodeGUI, Tauri, TypeScript - React.js, Redux, Redux-Saga, Redux-Thunk, Ant Design of React, Semantic UI React - Next.js, Gatsby.js - Angular.js, Angular 2+, Angular-Materail, NGRX - Vue.js, Nuxt.js, Vuex, Vuetify - CSS, SASS/SCSS 2. Back-End Development - Golang, C#, Laravel, Django, Node.JS, RUST, Typescript 3. CMS Development - WordPress, Wix 4. Other Skills - ASP.NET, ASP.NET MVC - Apollo, GraphQL - Webpack, Babel - MySQL, PostgreSQL, MongoDB, CouchDB, RethinkDB - Firebase, AWS, Azure, GCP - Bitbucket, GitHub - Python, ML, OpenCV, - Blockchain, Smart Contracts, Web3.js, Solidity I look forward with excitement to working with you.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    ASP.NET
    Node.js
    Solidity
    Svelte
    Vue.js
    Laravel
    Angular
    Mapbox
    React
    Blockchain
    Django
    TypeScript
    Python
    Golang
  • $35 hourly

    • 5.0/5
    • (124 jobs)
    Dear my Valued Customer, I'm a full-stack software developer. I'm your one-stop-shop. You can get me to build your Backend, Restful APIs, NodeJS Backend, NestJS Backend, web apps, MERN stack web apps, MEAN stack web apps, native iOS apps, native Android apps, React Native apps, Kotlin, Flutter, Unity, Python and even C# apps. All apps will be made carefully and perfectly by following a strict timeline. You can see things done week by week. If you have time, you can discuss closely with me every single detail of your apps. But, I only charge you a reasonable price. I'm open to any negotiations. So feel free to ask for some discount if it makes you feel more comfortable. I hope we will have a long-term working relationship. And I wish you all the best with your business plans. Best regards, Nhan Nguyen.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Kotlin
    Flutter
    Cryptocurrency
    Redux
    Ethereum
    Solidify
    Blockchain
    Smart Contract
    Vue.js
    Front-End Development
    MongoDB
    React
    Angular
    React Native
  • $70 hourly

    • 4.9/5
    • (78 jobs)
    Are you looking for the newest and most diverse software solutions like Full Stack Development, SAAS Development, Mobile Development, Blockchain Development, Artificial Intelligence, Automation, Task and Trading Automation, and Smart contract Development? Or do you need an eye-catching website along with a cutting-edge mobile application for the faster growth of your business? My expertise in the latest different technologies is ready to serve your business. I have over eight years of experience in Software and Web Development, MERN, SAAS development, Artificial Intelligence (AI), Automation, and Blockchain as a Top-rated Professional. With my expertise in different technologies, I create custom solutions for businesses that require modern and efficient software development. Whether you need a website or a web application, a solution for automation and full-stack development, or a smart contract that uses blockchain, ChatGpt, or AI, I'm well-equipped to provide excellent results. I am the CEO of Core Devs Limited, a Blockchain and Automation and Application Development company that provides excellent software solutions and consultancy regarding software services. I can offer you a bunch of expert software engineers proficient in managing complex and long-term projects. My Area of Expertise: 1. Web Development 2. SAAS Development 3. Mobile Application 4. Artificial Intelligence 5. GPT4 & OpenAI 6. Chatbots. 7. Chat GPT 8. Blockchain Development. 9. Data Scraping and Filtering 10. Task and Trading Automation 11. Web Crawling 12. Browser Automation 13. Smart Contracts on Ethereum, Polygon, Binance, Avalanche, Tron, and Cordano. 14. ERC-20/BEP-20 tokens 15. Multi-token NFTs (ERC-721/ERC-1155) 16. DAAP Development 17. DAO Development 18. Governance and Custom Smart Contracts 19. DEX Development 20. Web3 Marketplace Development 21. Escrow Development 22. Automation Tech stacks that I use: 1. React.js 2. React Native 3. MongoDB 4. ExpressJs 5. JavaScript 6. MERN 7. SQL Server 8. MySQL 9. ChatGPT 10. Puppeteer 11. Python 12. Django 13. Selenium 14. Scrapy 15. Regex 16. Rest API 17. Telegram API, Discord API, WhatsApp API 18. HTML5 19. CSS3 20. Bootstrap 21. Solidity 22. Web3.js, and Web3.py 23. Etherscan API, Opensea API, ICYtools API, and Moralis API 24. UNISWAP SDK, PANCAKESWAP SDK, SUSHISWAP SDK 25. Truffle 26. hardhat 27. Parity 28. Mist 29. MetaMask 30. MyEtherWallet 31. Node.js My proficiency in Full-stack Development, SAAS Development, AI, Automation, Web Development, MERN Development, and Blockchain Development can significantly benefit any project needing cutting-edge technology solutions. So, if you're looking for a Top-tier expert with extensive knowledge and experience in these areas, I'm ready to help. Feel free to contact me, and let's create something amazing!
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Web3
    Cryptocurrency
    Ethereum
    Solidity
    Blockchain
    Data Scraping
    Artificial Intelligence
    ChatGPT
    Automation
    Bot Development
    Mobile App Development
    Node.js
    Web Development
    API
    JavaScript
  • $20 hourly

    • 4.6/5
    • (41 jobs)
    🔴 TOP-RATED A+ DEVELOPER || 🔴 DELIVERY ON TIME || 🔴 OWNERSHIP OF PROJECT 💎 10+ Years of Experience. 💎 Web App Development Technology expertise Using MERN Stack 💎 Mobile App Development Technology expertise Using REACT NATIVE 💎 AWS Infrastructure 💎 Eager to learn - Honest - Reliable - Analytic - Ambitious - Team Player 💎 Firebase / Node.js / Express / MongoDB Expert 💎 Quality of Service with 100% work satisfaction to clients. 💎 Eager to learn - Honest - Reliable - Analytic - Ambitious - Team Player ✅ Specialized in MERN Stack Technologies. ✅ Specialized in Backend Development ✅ Specialized in React Native Mobile Applications Hybrid Framework ✅ Specialized in Blockchain DApp Development Smart Contracts / Ethereum ✅ Ecommerce Website Development ✅ PSD/Sketch/Figma design's conversion ✅ Specialized in Web Apps ✅ Theme Customization 🎯 Grow your sales and get new happy customers. 🎯 Create innovative and industry-leading products. 🎯 Give a recognizable and fresh look to your brand to stand out from competitors. 🎯 Turn your current clients into fans and make them follow your ideas and products. Hard Working ⇒ Quality Assured ⇒ Quick Turn Around Time ⇒ Positively Great Results 🔶 My SKILLS: 🔶 Graphic Tools Adobe Photoshop || Adobe Illustrator || Adobe Indesign || Adobe XD || Figma 🔶 CMS & Frameworks Wordpress || HubSpot COS ||Clickfunnel || WebFlow ||Squarespace || Php || || Laravel 🔶Front End Development Html (xHtml, html5) || CSS (CSS3) || Javascript (including jQuery) || Twitter Bootstrap || Foundation || AJAX || JS Frameworks || Tailwind CSS 🔶MERN Stack Development React Js 🔶Backend Development Php, Laravel, Node Js, MySql, Mongo DB 🔶Mobile App Development in React Native. 🔶 Devops Extensive experience in Docker, Git, Bitbucket, Coding, Design, Testing and Project Delivery with strong focus on OOP’s and DevOps • Cloud Computing – AWS • Google Analytics • GitHub, Jenkins • API (REST/ SOAP) • JIRA • CI/CD: Jenkins, BitBucket, Github, CPanel, Plesk ΞΞΞΞΞ🔶🔶🔶WHY HIRE ME?🔶🔶🔶ΞΞΞΞΞ 💎 100% availability. 💎 Professional customer service and availability at all times. 💎 Creative Work & Solutions. 💎 Targeted Deadline and Committed to complete within the deadline. 💎 100% Satisfaction. 💎 Lifetime Support. I don't make false promises. Client satisfaction is my pride. Thanks a lot for visiting my profile. Have a good day!
    vsuc_fltilesrefresh_TrophyIcon web3.js
    AWS Amplify
    Microservice
    MERN Stack
    Front-End Development
    AWS Lambda
    RESTful Architecture
    Google Cloud Platform
    DApps
    GraphQL
    Solidity
    TypeScript
    JavaScript
    Ethereum
  • $50 hourly

    • 4.9/5
    • (18 jobs)
    With 5 years in Chrome Extension Development, I craft powerful, user-centric extensions that elevate browser experiences. 🔥 Why Me? - Mastery over Chrome's Extension APIs. - Tailored Solutions for standout extensions. - Quality-First Approach ensuring seamless performance. - Transparent & Timely communication. - Your vision + My expertise = Extensions that users love. Let's chat!
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Web Application
    Next.js
    Browser Extension
    JSON
    React
    API
    MongoDB
    Google Chrome Extension
    Node.js
    Ethereum
    Blockchain
    JavaScript
  • $45 hourly

    • 5.0/5
    • (15 jobs)
    Creation of blockchain data analytics services (bitcoin, ethereum and other networks). Development and writing of smart contracts on Solidity Deployment, testing and development of smart contracts in the BSC network Integration of smart contracts with web3.js services Development of analyzers for blockchain transactions Deep understanding of smart contracts Knowledge of web3.js, restapi, python - NFT / Web3 / Blockchain / Ethereum / Dapp / Minting Dapp/ - NFT / Art Generation - React / VUE3 - Angular 2 - Angular 9, Angular Universal, Angular Material - HTML5 / CSS3 / LESS / SASS - RESTful API / GraphQL - Bootstrap, Flexbox - Gulp, Grunt, Webpack Solidity development experience Experience in preparing smart contracts for audit English at the level of reading documentation (English at the level of passing the interview will be a plus) Knowledge in developing yield farming strategies Responsibility, punctuality and ability to plan work in stages Attention to detail
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Smart Contract
    React
    Django
    Node.js
    Nuxt.js
    Flask
    Solidity
    Ruby on Rails
    Angular
    Vue.js
    Next.js
    Python
  • $70 hourly

    • 4.4/5
    • (9 jobs)
    I'm a blockchain expert and enthusiast with over 5+ years of field experience. I have worked with many reputed blockchain companies providing solutions for smart contract development, Defi, BEP20-ERC20-ERC721-TRC20 tokens, NFT market places, wallet designing, wallet creation, web-designing and development, social media marketing and advertising for various blockchain firms. Some of our clients include: • OMG Network • OMGFin Exchange • Uquid Coin • Uquid NFTD • Phoneum • EventChain • Helios Protocol • Bitconnect
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Blockchain Development
    WooCommerce
    Ethereum
    Solidity
    Multi-Level Marketing
    Node.js
    Smart Contract
    Blockchain Architecture
    React
    Cardano
    Binance Coin
  • $25 hourly

    • 4.8/5
    • (343 jobs)
    COMMITTED TO LONG-TERM WORK RELATIONSHIPS AND QUALITY WORK 🏆 TOP RATED Wordpress and Shopify developer on UPWORK 👌 High Client Recommendations. 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 11494 𝐡𝐫𝐬 | 𝐂𝐨𝐦𝐩𝐥𝐞𝐭𝐞𝐝 334 Projects 𝐬𝐮𝐜𝐜𝐞𝐬𝐬𝐟𝐮𝐥𝐥𝐲 I am Puneet Kaushal, specialised in web designing and development with more than 10 years of working experience. I have done Masters in Computer Science. Understanding the requirements with a complete idea of clients' imagination, doing the planning and making a strategy for making all imaginations to practical is my key skill of getting success. I am a hard and smart working guy. I have successfully completed more than 8800 hours on Upwork. I do design and Development for Web and Mobile applications using multiple skills mentioned below. Web Development skills: PHP, WordPress, Shopify, Shopify Plus, Squarespace, Webflow, Weebly, Hubspot, Django, Solidity, REACT, SAAS, Node.JS, Angular.JS, Laravel, Codeigniter, Opencart, 3rd Party API Integration. Web Designing Skills: PSD-HTML5 / Wordpress, Shopify, Shopify Plus, Illustrator, Unbounce, Click funnels, Wix, My responsibilities include: Design, build and maintain efficient, reusable, and reliable code Ensure the best possible performance, quality, and responsiveness of applications Identify bottlenecks and bugs, and devise solutions to mitigate and address these issues I have worked on these websites : Membership Websites Real Estate websites Payment Gateway integration E-commerce websites Online Stores EMR and Health Services Real Estate IDX and MLS integration Scheduling and Booking website SAAS and Business Analytics SAAS & Business Intelligence Dashboard and Reporting Social Networking Video Streaming and Conferencing CMS Certified WordPress Finance, Mortgage, Insurance I believe in communication to meet the customer's needs and expectations for a given job. I strive to be the only person you'll need for all your web needs. Let's work together and make your vision for a web or mobile the best it can be. I always work with Upwork Rules and Regulations for getting paid i.e on Hourly and Fixed Price Projects. My Availability Hours: EST, PST, CST, IST business hours. So let's discuss the project which you do have and make your imaginations practical. NOTE: You will see some open contracts, because my clients want to retain me for future assignments and long term support.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    SEO Audit
    Solidity
    HubSpot
    Avada Theme Customization
    Theme Customization
    Liquid
    Laravel
    Payment Functionality
    WordPress
    Webflow
    Thrive Themes
    Squarespace
    Shopify
    LearnDash
  • $50 hourly

    • 4.9/5
    • (200 jobs)
    I am a senior full-stack web developer who can easily adapt to any technology required for your projects. I have proven knowledge of the requirements for web applications and try to provide the best solution for each scenario to allow your web product to grow and thrive. I earned a master's degree in Computer Science and Engineering and have since been working for software companies of all sizes from all around the globe as a freelancer. Currently, I enjoy working as a full-stack architect in PHP, JavaScript, Python projects, where my experience and my deep understanding of architecture and theory are most impactful. I am a self-driven and detail-oriented developer, focusing on quality and exceeding expectations of both internal and external clients, along with excellent communication skills and a passion for test-driven development. My skills including such as: - PHP, Codeigniter, Wordpress, Woocommerce, Magento1/2 - Javascript, Angular.js, Node.js, Vue.js, React.js, Redux - Python / Django - MySQL, PostgreSQL, MongoDB - HTML5, CSS3, LESS, SASS, Bootstrap 3/4 - JSON, XML, REST API, Google API, AWS, Social APIs
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Vue.js
    DApps
    VYPER Software
    WooCommerce
    React
    Plugin Development
    Truffle
    WordPress
    Solidity
    JavaScript
    Ethereum
    PHP
    Node.js
    Blockchain
  • $50 hourly

    • 5.0/5
    • (108 jobs)
    I have 4+ years of experience in Blockchain Development. So far, I have completed 50+ Decentralized applications Dapps. You can work with me on different Blockchains like -Binance Smart Chain -Ethereum -Tron -Solana -Kucoin -Polygon (Matic) Crypto Payment Gateways | Tokenization | Defi | DEX | CEX | Smart Contract Development & Audit | Cryptocurrency | Wallets. You can get help with Javascript, Reactjs, Nodejs, MongoDB, Express.js, Solidity, IPFS. I offer Decentralized application & web development and consultancy for Blockchain start-ups, companies to support building a new product or enhance their existing products. I have been a self-motivated Learner with extensive experience in Blockchain and Decentralization with modern technologies.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Smart Contract Development
    Full-Stack Development
    Blockchain, NFT & Cryptocurrency
    DApps
    JavaScript
    Ethereum
    Cryptocurrency
    Blockchain Development
    Smart Contract
    Node.js
    Initial Coin Offering
    Blockchain
    Blockchain Architecture
    Solidity
  • $127 hourly

    • 4.7/5
    • (8 jobs)
    I'm an extremely experienced full stack developer & architect of 11 years. I have worked for large marketing consulting agencies, venture funded startups, and my own consulting agency. I am knowledgeable in a wide range of technologies and methodologies.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    AWS CloudFormation
    DevOps
    ExpressJS
    Next.js
    Cryptocurrency
    Website Development
    Web Application
    AWS Lambda
    PostgreSQL
    HTML5
    JavaScript
    TypeScript
    Node.js
    React
  • $30 hourly

    • 5.0/5
    • (15 jobs)
    With 5 years of experience as a software engineer, I've honed my skills in various domains, with a particular focus on blockchain technology for the past 1.5 years. This specialized expertise allows me to craft innovative, efficient, and highly secure solutions. My proficiency in Solidity smart contracts and Web3.js has enabled me to develop a series of Ethereum-based decentralized applications (dApps) tailored to the unique requirements of clients. My comprehensive knowledge of blockchain technology empowers me to conceptualize, create, and deploy solutions that fully harness the potential of this transformative technology. My commitment to writing clean and scalable code ensures the development of dependable and well-structured dApps that can be easily maintained. I prioritize delivering high-quality work within deadlines and budget constraints, and I'm dedicated to staying abreast of the latest developments in the blockchain space, making me a valuable asset to any project. In addition to my blockchain expertise, I also excel in building hybrid applications using ReactNative and Ionic, with experience in developing finance, social, and chat applications. As a Mobile and Web developer with over 5 years of well-rounded experience, I bring proficiency in a wide range of technologies, including Flutter, React-Native, React, Angular, and JavaScript development. My versatility and dedication to excellence make me a valuable contributor to diverse projects, ensuring the delivery of cutting-edge solutions that meet and exceed client expectations.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    React Native
    Solidity
    Smart Contract
    WebRTC
    Web Development
    MongoDB
    Angular
    React
    Node.js
    HTML5
    CSS
    Bootstrap
  • $50 hourly

    • 5.0/5
    • (70 jobs)
    Hi! I'm a Full Stack Blockchain and a Subgraph (TheGraph) developer. I've more than two years of experience in writing smart contracts and building decentralized applications. I graduated from University of Karachi with a Bachelor's degree in Software Engineering in 2020, and have spent the last year working on blockchain based projects. In my journey I have built different types of decentralized applications including DeFi, NFT, Interoperability (bridges), ICO, Staking and E-commerce. Skills : - Solidity Programming - Understanding of Foundry, Hardhat, Truffle ((incl. Unit Testing) - Understanding of MetaMask & other Wallet APIs - React/Next JS/ Typescript - Web3 / Ethers JS - Subgraphs (Indexing protocol for querying networks like Ethereum) I'm looking forward to working with you!
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Python Script
    Smart Contract Development
    Blockchain, NFT & Cryptocurrency
    React
    DApps
    Web Development
    Blockchain
    Node.js
    Solidity
    Blockchain Development
    JavaScript
    Ethereum
    Smart Contract
    TypeScript
  • $125 hourly

    • 4.9/5
    • (31 jobs)
    Top 1% Freelancer: Upwork has awarded this freelancer the Expert Vetted Badge! Blockchain | DAO | Tokenization expert. CBO @ TIEX | Board Member @ CUTI | Co-founder @inmind and father of one. Tech enthusiast, always looking to enhance or create business for my customers through new technologies, especially blockchain, and mobile. Amateur runner. Our team enjoys doing great work and forming long-term partnerships with our clients. We love innovation and working hard to solve problems that others cannot.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Blockchain
    Mobile App Development
    Android App Development
    iOS Development
    Kotlin
    Java
    Amazon Web Services
    Swift
    Node.js
    Objective-C
  • $55 hourly

    • 4.1/5
    • (26 jobs)
    I specialize in versatile sorts of digital solutions and can provide: - Blockchain Development - Website and Mobile Application Development - NFT, Metaverse, Immersive Worlds - Graphic Design, 2D/3D Design, and Product Development - Website, admin portals, and Mobile App designs - Interior Design and Consultation - Drafting, Architectural Planning - Game Design and Development, Animations - 2D/3D Games, VR Games, VR Apps and AI - ChatGPT integrations - SalesForce administrations I turn dreams into digital triumphs. Let's shape the future together! 💡
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Smart Contract
    Ethereum
    DApps
    Node.js
    3D Animation
    Cryptocurrency
    Blockchain Development
    React
    Architecture Design
    Interior Design
    Website Development
    Android App Development
    iOS Development
    Game Development
  • $90 hourly

    • 4.5/5
    • (169 jobs)
    I love what I do! I have built 100+ successful professional business websites/web apps, mainly using Javascript frameworks/libraries, Shopify, Woocommerce, etc. Areas of Expertise • React/Redux, React Native, Angular/Ionic, Vue/Vuex • Node.js, Express.js • CSS3/SCSS/SASS •JavaScript: jQuery, D3.js, ES6+, TypeScript, Web3 •Webpack, Gulp, Jest/Cypress/Mocha, etc • PHP, Laravel framework, Python/Django • WordPress, WooCommerce • Shopify, Magento, BigCommerce, CS-Cart • MySQL, MongoDB • Firebase, AWS, GCP * Retool, Bubble.io I am sure you will be delighted with my work regarding quality and speed as my previous clients did. Let's make the dream come true!
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Gatsby.js
    Amazon Web Services
    Python
    Vue.js
    Angular
    JavaScript
    PHP
    BigCommerce
    WooCommerce
    WordPress
    Shopify
    Node.js
    React
  • $60 hourly

    • 5.0/5
    • (8 jobs)
    Hello there, Good to see you! I'm a senior frontend developer with a good design sense for pixel-perfect development. I have 8+ years of experience in Typescript, NextJS, ReactJS, Redux, GraphQL, Javascript, HTML5, CSS3, SASS and everything around them including CSS preprocessor (SASS etc.) and build tools(Webpack etc.). I have worked with clients across the globe. I'm a qualified Udacity's Frontend Nanodegree Graduate. I have strong working experience with Material-UI (v4 and v5) including custom theme setup and development from scratch. I'm obsessed with writing beautiful, clean, efficient code. I have strong expertise in SPA(Single Page Applications) using Reactjs with redux with REST APIs and AWS. lastly the profile is worth $120K+ with 8 jobs but not a single negative review you can find. I assure similar experience to you as well.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Redux Saga
    Material Design
    Web Design
    Front-End Development
    TypeScript
    JavaScript
    API Integration
    Web Development
    Next.js
    Redux
    Tailwind CSS
    Web Application
    Node.js
    Landing Page
    React
  • $84 hourly

    • 5.0/5
    • (8 jobs)
    I've been successfully working as an expert in system and software development for the last 10 years. During the past years, I've participated in and led a lot of exciting projects such as web platforms, mobile games, mobile applications, blockchain applications
    vsuc_fltilesrefresh_TrophyIcon web3.js
    Truffle
    Ethereum
    Python
    Cryptocurrency
    Blockchain
    Node.js
    Smart Contract
  • $180 hourly

    • 4.9/5
    • (24 jobs)
    I'm developing blockchain solutions since 2017. Including the crypto exchanges (P2P and CEX), blockchain forks, tokens creation (ERC-20, ERC-721 NFT), smart contracts, DeFi and Ethereum mass payment tools with low gas consumption. The other chains experience includes: Bitcoin, Polymesh, Chainlink, Binance , Harmony , Ethereum , Solano and Hyperledger. I have hands-on experience with Python, Django, AWS, R, Hadoop, SQL, Bash, PostgreSQL, MySQL, MS SQL. I'm in IT since the 2012. I'm well versed in Blockchain technologies and particularly Ethereum. I lead a top rated team - the Coding LegendsTeam - which is ready to deliver a software solution for your product or idea from the discovery and proof of concept to the production and maintenance. Stay safe - hire reliable people that deliver, do not disappear, and do not cheat. Please check my LinkedIn (Jeyaseelan Jeewarathnam) profile for extra recommendations. I am open to opportunities that can make the world a better place - and I'd be glad to know the details about your project or idea. Solutions I provide: ✔ DEX and Centralized Crypto Exchange ✔ Advanced Trading Platform (Stocks, CFD, Forex, Option, Features...) ✔ Portfolio Tracking Platform ✔ Web/Mobile Wallet ✔ Crypto Betting and Casino ✔ Yield Farming Protocols ✔ Liquidity Mining Protocols ✔ Flash Loans ✔ Impermanent loss, governance tokens ✔ P2P/Pool Lending and Borrowing ✔ Crypto Collectible Platforms and Non-Fungible Tokens ✔ Custom dApps ✔ ERC20, ERC777, ERC223, ERC721, ERC1155 Smart Contract Development ✔ Forsage, Linos Share, BestMining like MLM Crowdfunding HYIP Platforms ✔ ICO, STO, Blockchain Copyrighting and Whitepapers ✔ API Development and Integration: blockchain.info, inrura.io, poloniex.com, bitfinex.com, hitbtc.com, coinbase.com, kraken.com, cex.io, coinmarketcap.com, cryptokitties.co, uniswap.org, aave.com, yearn.finance, sushiswap.org ✔ Defi development: Yearn, Uniswap, Curve, Balancer, Synthetic, Compound, Aave, Mooniswap, Fulcrum, dYdX, Sushi Swap, Zapper, Maker, insstaDApp, Bancor, Loopring, Polkadot, Substrate, WBTC, RenVM, DDorce, mStable, Alchemy, Binance Launchpool (BellaProtocol), MLM, NFT, BakerySwap, Pickle, Fortube, PerlinX, UMA Project, YFV, YFII, Synthetix, dForce, Swerve, Zoom Protocol ✔ Blockchain stack : Web3, Solidity, Infura, Truffle, OpenZeppelin, MIST/Remix, BTC, ETH, TRON, USDT, YFI, Bel ✔ Wallets and Clients: MEW, Geth, Parity, Gemini Mist, Metamask, Ganache Web Stack: ✔ Web3.js, Ethereum, Solidity, Truffle ✔ PHP / Laravel / Yii (2) ✔ HTML (5), CSS (3), LESS, Sass, Bootstrap (3/4) ✔ JavaScript/ Typescript, Vue.js, React.js, Node.js ✔ MySQL, MongoDB, Redis ✔ 3rd Party API Integrations ✔ TDD methodology (Unit-testing) Serving honest Internet Marketing services to help you and your business - "High PR Backlinks" , "Website Traffic" , "YouTube views", "Press Releases" , "Keyword Research" , full SEO and SEM spectre of services! Experience – Our team members have 8 years of experience in the eCommerce and eMarketing field. Certified professionals - In-depth knowledge of all three levels of SEO – Technical, On-Page and Off-Page Optimization. Get the Best, Earliest - We value your time and we are passionate about our job. The best combination ever! Adaptability - Our team is highly flexible and willingly reacts to spontaneous changes in sticky situations. Increased Conversion - Good user experience guarantees regular traffic. We work to keep your visitors happy, ensuring their return every time! Connect to SEO spiritually - Our experts have profound knowledge of the social media landscape, web analytics, design and development, etc., which helps them connect to SEO on a deeper level. Steady Communication - Communication is the essence of a steady, professional relationship and we practice what we preach. Ability to Reason - We analyze, implement and explain to you the extent of the changes that are made, helping you understand what we do and why! Ethical and Result Oriented - We respect the ‘Google Rulebook’ and stick to White Hat SEO techniques, guaranteeing the safety of your website. Client Reviews - Our history of satisfied clients is a testament of our skill-set in eMarketing. They are like family to us, we consider their websites as our own.
    vsuc_fltilesrefresh_TrophyIcon web3.js
    DApps
    Digital Marketing
    Blockchain
    Python
    React
    AngularJS
    Web Development
    Mobile UI Design
    Ethereum
    Marketing Strategy
    Node.js
    Solidity
    Golang
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