Hire the best Solidity Freelancers in Ukraine

Check out Solidity Freelancers in Ukraine with the skills you need for your next job.
  • $35 hourly
    Greetings 👋, I'm Anton, a highly skilled web3 full-stack + blockchain developer. I specialize in Web, Blockchain, Smart Contracts, DeFi, NFT, and Dapp development. 🏆 The winner of the Blockchain Hackathon in 2022, received recognition from Vitalik Buterin, the founder of Ethereum 👨‍💻 4000 hours of web3 development ✅ 20+ completed projects 🥇 NEAR MetaBUILD III Hackathon winner I can help you with: 👉 Build and deploy blockchain applications Leverage my expertise in blockchain development to create secure, decentralized applications tailored to your specific requirements. Whether it's building a custom blockchain solution or integrating blockchain technology into your existing systems, I can guide you through the entire process. 👉Develop smart contracts Utilize my blockchain knowledge to design and deploy smart contracts that automate and enforce trust in your business processes. From NFT, cryptocurrency to decentralized finance protocols, I can assist you in creating robust and secure smart contracts. 👉 Implement DeFi solutions I can assist you in developing DeFi platforms, liquidity pools, yield farming mechanisms, and other cutting-edge financial solutions, helping you tap into the vast potential of the blockchain ecosystem. 👉 Provide blockchain consulting If you're unsure about the best approach to leverage blockchain technology for your business, I can offer expert guidance. From understanding different blockchain platforms to assessing the feasibility of your project, I can provide valuable insights to help you make informed decisions. 🛠 Tech Stack: - React, Next.js - Solidity, Hardhat - TypeScript, JavaScript (ES - Latest) - Ethers.js, Web3.js, Wagmi - PostgreSQL, MongoDB - Node.js, Express, Nest.js ✉️ Press the "Invite" button at the top of my profile to discuss your project requirements, and let's work together to create innovative solutions tailored to your business needs!
    vsuc_fltilesrefresh_TrophyIcon Solidity
    DApp Development
    Cryptocurrency Forking
    Crypto Wallet Development
    Ethereum
    Blockchain
    Crypto Exchange Platform
    Cryptocurrency
    NFT
    Web3
    Blockchain Development
    Smart Contract Development
    Blockchain, NFT & Cryptocurrency
    DeFi
    React
  • $55 hourly
    🔝 TOP 10% of Upwork Agencies 💯 Job Success ⭐️ 5-Star Rating 🏆 Hackathon winners 🔟/🔟 Smart Contracts Rating Audited by Hacken ✅ ⭐️⭐️⭐️⭐️⭐️ "We look forward to continuing our collaboration on the next phase! Yevhen, Dexola, and the rest of the team have been an absolute pleasure to work with. Very knowledgeable and responsive, would highly recommend!" ⭐️⭐️⭐️⭐️⭐️ "It was a pleasure working with Yevhen. He is highly skilled and very professional. Will definitely work with him again. Highly recommended." As a CTO with over 10 years of experience and 45 blockchain-based projects completed, I have a proven track record in delivering high-quality, scalable, and secure web solutions. My expertise lies in blockchain and Web3 technologies. I am passionate about building innovative blockchain and Web3 products that solve real-world problems. Furthermore, I am committed to working closely with my clients to understand their needs and ensure that their projects are a success. 📍 Blockchain & Web3 Development: - DAO, DeFi and GameFi solutions - EVM Chain (Ethereum/ETH) - Solana - Solidity, Rust 📍 Smart Contracts: - NFT Smart Contract - Staking, Minting, Airdrops - Security Smart Contracts Audit 📍 Full-Stack Development - Node.js, React.js, web3.js, Vue.js, TypeScript etc. - API Integration - Building & Deploying Scalable and Secure Applications 📍 Trading & Automation: - Decentralized Exchange (DEX/CEX) - Trading Bots (bonding curve keys, volume bot, telegram bot) - Crypto Casinos 📍 Integration & Bridges: - Wallet Integration (WalletConnect, Coinbase Wallet, etc.) - Blockchain Bridges ⌛️ Proven success in delivering projects on time and within budget 🙌 Excellent communication and interpersonal skills Let's hop on a call and discuss how I can make your project happen.
    vsuc_fltilesrefresh_TrophyIcon Solidity
    AI Chatbot
    Blockchain, NFT & Cryptocurrency
    Cryptocurrency
    React
    Ethers.js
    Web3
    DeFi
    Blockchain
    Smart Contract Development
    Solana
    Node.js
    Ethereum
    Smart Contract
    web3.js
  • $40 hourly
    🙋 I am a passionate software engineer with 7+ years of experience. ✅ My main strengths are: ➳Frontend: React, Next.js, Vue.js, Tailwind CSS, GSAP. ➳Backend: Node.js, Django, Flask, PHP. ➳Web3: ethers.js, web3.js ➳ Smart contract, DApp, NFT, Stacking with solidity ➳ Machine Learning Projects with Python ➳ OpenAI, ChatGPT, LangChain Development ➳ Image Processing with OpenCV, OpenGL ✅ I graduated from Taras Shevchenko National University of Kyiv and awarded a Bachelor degree of Computer Science. My skills will not be limited to the ones listed above. I will always be prepared to accept new concepts and technologies with an open mind and will continue to improve my skills. ✅ My goal is to satisfy clients with great performance and deliver the project within the exact time line maintaining best quality. I always keep in mind that ★Money is once, but the trust is ever.★. ⚒ Once you hire me, you will be delivered a high-quality product as I am an honest developer and have a potential that can carry out any of the assignment with profession. I am sure I can because I am a professional competitive programmer. ⚒ Thank you for your time. Looking forward to being hired by you soon. Best regards!
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Angular
    Flask
    Django
    Python
    web3.js
    DApps
    Smart Contract
    Node.js
    Vue.js
    React
    JavaScript
    TypeScript
  • $35 hourly
    Highly skilled Full Stack Web Developer with 8 years of experience in developing robust and scalable web applications. Proficient in Ruby on Rails, React, Node, Python and DevOps. Strong problem-solving abilities and passion for delivering high-quality software solutions. Committed to staying up-to-date with the latest industry trends and technologies.
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    Web3
    Linux System Administration
    Web Analytics
    DevOps
    MongoDB
    PostgreSQL
    MySQL
    Laravel
    Vue.js
    Python
    React
    Golang
    Node.js
    Ruby on Rails
  • $60 hourly
    I am the team leader of a team of professional blockchain developers offering a wide range of services in the blockchain development and consulting segment. I am also the founder of ChainTech Solutions, an outsourcing agency specialising in blockchain development and consulting services. Areas of expertise of my expertise and our team: 🟢Development Smart contracts development Cryptocurrency wallet development Private, public, and hybrid blockchain development Trading platform development Decentralized application (DeFi, DEX, DAO, and others) development Mining solutions Blockchain gaming (GameFi development) NFT marketplace development Hyperledger infrastructure IDO & ICO tools Tokenization of businesses Integration of storage and cryptocurrency transaction functions into your products 🟢Consulting Evaluating blockchain use cases Determining the suitability of blockchain solutions Optimising business processes using blockchain technology Blockchain Architecture Implementing the right blockchain attributes Opening new customer channels using blockchain Transforming your business towards a data-driven business Digitalising your business A customised business plan to integrate blockchain technology into your business; 🟢Other Outstaffing a blockchain development team Outsourcing blockchain application development for B2B applications Outsourcing of web and mobile development Smart contract auditing Support and maintenance of existing projects 🤝 Why me ? - Experience in blockchain technologies and research - Myself and my team combine development, design and management skills to deliver and support projects of any complexity. - We deliver high quality blockchain solutions that meet the needs of our clients - Advice on blockchain integration and usage to help them realise their business goals - We are available 24/7 online and we are always ready to answer your questions, even if they are complex or technical, Feel free to contact us even if you are not familiar with the technical aspects and terms. ✅ Technology Stack: Front-End: - JavaScript, TypeScript, - Redux, Mobx, RxJS, - React.js, Angular.js, Vue.js, Next.js; Back-End: - NodeJS, TypeScript, Rust, - Express.js, Nest.js, AdonisJS, Python, Solidity, C, C++, Go, SQL and NoSQL, MongoDB, GraphQL, Web3.js, Ethers.js, Redis, Docker; Mobile: - Java, Kotlin, - Objective-C, Swift, React Native, - Flutter; Blockchain: Layer 0 - Cosmos, Polkadot, Kusama; Layer 1 - Ethereum, BNB chain, Solana, Near, Aurora, Cardano, Avalanche, Cronos, Internet Computer, Ton, Aptos, Sui, Astar; Layer 2 - Polygon, Arbitrum, Optimism, Base, Starknet, ZKSync, ZkRollups; Thank you for reading to the end! Do you want your business to be more efficient with innovative blockchain-based solutions? Please feel free to contact me. I always respond quickly on Upwork. Briefly describe your problem or idea in your own words and I will suggest the best solution. We can also accept a video call to discuss your project.
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Cryptocurrency
    Scala
    Cardano
    Polkadot
    Smart Contract Development
    Web3
    Product Development
    International Development
    Blockchain
    Rust
    JavaScript
    Ethereum
    Blockchain Architecture
    Blockchain Development
  • $40 hourly
    As a self-employed blockchain and crypto trading bot developer, I leverage my strong Python, JavaScript, Solidity, Rust, Go programming skills and quantitative analysis abilities to design and develop a trading bot that optimizes trading performance and risk management in multiple CEX (Bybit, Biinance, Coinbase, Kukoin, etc) and DEX (Ethereum, BSC, Solana, Ton, Tron) exchanges. I have successfully managed option trading activities for over 8 years, using algorithmic strategies and market data to execute profitable trades. I have also designed and implemented many decentralized applications (DApps) and smart contracts that enhance transparency and security for various industries. I am driven by the potential of blockchain to revolutionize how we interact with digital assets and believe in its power to create trustless and efficient systems. Core Expertise: Blockchain: - Smart Contracts (ERC20/721/1155/4337), dApps, NFT marketplace, DAO, Bridge, SPL tokens, Memecoin, Stablecoin, Crypto exchange/wallets. Trading Bots && Strategies: - Trading Bots: Arbitrage, Market-Making, Trend-Following, Grid Trading, Scalping, Copy Trading, Volume, Frontrunning, Liquidity Sniper. - Strategies: Day Trading, Position Trading, Forex Trading, Arbitrage, Scalping, Algo Trading, Grid Trading. Programming Languages & Frameworks: - Languages: Python, JavaScript, Solidity, Rust, Go. - Frameworks: Django/Flask, Node.js, Golang DevOps & Cloud: - Containerization: Docker, Kubernetes. - Cloud Platforms: AWS, Azure, GCP. - CI/CD: Jenkins, GitLab CI, GitHub Actions. My goal is to pursue an entry-level position in software development that allows me to apply my skills and knowledge to real-world problems and contribute to the success of the company.
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    Blockchain, NFT & Cryptocurrency
    Blockchain
    Web3
    Solana
    Ethereum
    Pine Script
    Forex Trading
    Artificial Intelligence
    Bot Development
    Trading Strategy
    Golang
    Rust
    JavaScript
    Python
  • $35 hourly
    ✌️ You will get satisfied result in right time. I always try to make perfect one that client wanna make. I'm seasoned and dedicated Rust and Python developer and have vast experience with React, Angular, Wordpress and GoHighLevel. Familiar with web3, smart contract development. Implement your idea to perfect real one is my duty and mission
    vsuc_fltilesrefresh_TrophyIcon Solidity
    React
    web3.js
    Solana
    Rust
    Bot Development
  • $50 hourly
    Blockchain engineer | Full Stack developer Hello, everybody. My name is Vadym Honcharov. 🥇 5 Years of experience in development. 🥇 4 Years of experience as a Blockchain Engineer. 🏆 Part of the product development team being used by millions of users. 🔥 Specialize in Ethereum, DeFi, Dex, NFT Marketplace, ledger, Smart Contracts, Solana, and XRP. etc 🔥TailwindCSS, Styled Components, Sass/Less, HTML, CSS, JavaScript, and various frontend frameworks ❤️ Passion for Blockchain and Frontend development. As a Blockchain engineer and Full Stack Developer, I excel in blockchain platforms such as Ethereum, DeFi, Dex, NFT MarketPlace, ledger, Smart Contract, Solana, and XRP. My technical expertise also extends to frontend technologies like TailwindCSS, Styled Components, Sass/Less, HTML, CSS, JavaScript, and various frontend frameworks. With a strong foundation in both blockchain and frontend/backend development, I am committed to delivering high-quality solutions that meet the unique needs of clients. I specialize in creating innovative solutions on Solana, Ethereum, and other blockchain platforms, leveraging my deep expertise in smart contracts, tokenomics, and decentralized applications (dApps). My proficiency extends to Solidity and Rust, allowing me to craft secure and efficient ERC20, ERC721, and ERC404 tokens, as well as SPL tokens and the advanced token2022 standard. With a strong foundation in full-stack development, I excel in building robust front-end interfaces using React and Vue.js, while my back-end capabilities are powered by Node.js and MongoDB, all seamlessly integrated through JWT authentication. And my extensive experience includes developing sophisticated bundle-sniping bots and launchpad platforms that enhance the efficiency and security of token launches and trading activities. I am adept at managing and deploying applications on Ubuntu environments, ensuring high availability and performance. As an AI expert, I integrate machine learning models to enhance blockchain analytics and automation, driving smarter, data-driven decision-making processes. ⭐ Services I Offer ✔ Web 2.0 ☑️ UX/UI research & design ☑️ Frontend development: React.js, Vue.js, Typescript , Laravel, JavaScript, HTML, CSS3 ☑️ Backend development: Python (Django), Node.js, PHP, JavaScript ☑️ Mobile app development: Flutter, React Native ✔ TypeScript Framework and Libraries ☑️ React/Redux & React Hooks, Angular, Vue Material UI, Reactstrap, Semantic UI, JSS, Styled Components, TailWind, AntD Redux-Saga & Redux-Thunk, Redux-Form React-Router, React-Helmet, React Charts, D3.js, Immutation Next.js, ✔ Web3.0 & Blockchain Solutions ☑️ Chains - Ethereum, EOS, Solana, Binance, Polygon ☑️ Smart contracts - ERC20, ERC721, ERC721A, ERC1155 ☑️ DeX's - Pancake Swap, Uniswap, Sushi Swap ☑️ DAO - From smart contract development to DAO governance ☑️ D Apps - NFT minting buy, sell OR digital assess buy / sell OR Identity management etc ☑️ Hyper-ledgers - Substrate [custom chain development] ☑️ Launchpad with functionality of bundling and sniping based on Solana and Ethereum chain. ⭐ My commitment ✅ 100% work quality ✅ Project demonstration & documentation ✅ Active support against any issue (even after deployment) ✅ 15 hours free-of-cost maintenance & support ✅ Free Discovery sessions & project consultation
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Bot Development
    Telegram API
    NestJS
    Next.js
    React
    Node.js
    Web3
    Rust
    Web Application
    Web Development
    Ecommerce Website
    NFT
    Blockchain Development
    Blockchain, NFT & Cryptocurrency
  • $45 hourly
    Starting from middle of 2018 began proactively working on blockchain related projects as a Blockchain developer. My experiences range from creating both front-end blockchain applications to backend architecture design and implementation, smart contract development, testing, auditing and development for Fintech and other industries that need the power of decentralization, tokenization, and smart contracts. Expertise in Public Blockchain Platforms: Ethereum | Solana | Binance Smart Chain ✓ Developing smart contracts by Solidity and Rust programming languages. ✓ Developing RPC using client libraries such as Web3js. ✓ Static analysis of smart contracts for gas consumption and optimization using Remix IDE. ✓ Securing smart contracts using libraries like OpenZeppelin. ✓ Developing Ethereum dApps using Truffle framework. ✓ Integration with crypto wallets such as Metamask & Phantom. ✓ Deploying smart contracts on test networks such as ropsten/rinkeby as well as ethereum/solana mainnet. Expertise in Private & Consortium Blockchain Platforms Hyperledger Fabric ✓ Developing Chaincode using the Go programming language. ✓ Developing proof of concepts using Hyperledger Composer. ✓ Integration with Fabric Java SDK. ✓ Creating RESTful APIs for client applications to communicate with the blockchain network. ✓ Creating channels, orderers, and peers. ✓ Deployment and instantiation of Chaincode on channels on cloud services like IBM Bluemix and Amazon AWS. I hold expertise with: - Solidity / Rust / Golang - React.js / Express.js / Vue.js / Next.js / Angular.js / Redux /Node.js - Laravel - MySQL / MongoDB / PostgreSQL / MSSQL - Heroku / VPS / Amazon Web Services (AWS) / Digital Ocean - Github, Gitlab, Bitbucket, Trello, Backlog, etc. Here are the applications that I've built so far. - Dapp, DeFi development - NFT game/marketplace development on Ethereum & Solana blockchains in Solidity & Rust - Ethereum & Binance Smart Chain token development on ERC20, ERC721, ERC1155, BEP20, BEP721 & BEP1155 protocols - ICO / ITO / IDO / STO, Cryptocurrency exchange & Cryptocurrency wallet Development Further Expertise & Work Deliverables in Blockchain: ✓ DApp for Supply Chain Management for Food Industry ✓ DApp implementation in Philanthropy ✓ DApp for Anti-Counterfeiting in the Pharmaceutical Industry ✓ Worked on Protocols like Ethereum, IBM Hyperledger, Stellar ✓ SetUp of a Permission-based Consortium Network ✓ Implementation of Private, Public and Permission-based network
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Laravel
    Next.js
    ExpressJS
    Vue.js
    Angular
    React
    Solana
    web3.js
    PHP
    DApp Development
    TypeScript
    JavaScript
    Node.js
    Rust
  • $50 hourly
    "When will you be more than 100% satisfied?" - I make sure that I deliver the best quality solutions and ensure you get the outcome quickly. This is my slogan and including all my acitivies. Thank you for visiting my profile! You’re probably looking for a talented blockchain & web developer to help you with an decentralized application and distributed storage and your own service. And you do not simply want generic IT developer. I'm surely said that "It is Me!" And I don't think that my ability is lower than others. 1) Blockchain Blockchain is one of the biggest buzzwords in technology right now. But what is it? And why? - Reliable - Distributed leader technology - P2P When we are saying blockchain, first we can think Bitcoin. 1st generation - Bitcoin 2st generation - Smart Contract Now it is a great opportunity to change your business and run into a blockchain network. Please hurry! I will help you with the following skills. - Smart Contract (Solidity, Web3.js) - Cryptocurrenty (ERC20-223, Bitcoin, Ethereum, TRON, EOS ... ) - Cryptocurrency Exchange Site Peatio, WIox - Make new coin 2) Web Services You will want to create your own web service based on your business logic. It will need to create your own website and mobile, tv apps which is more secure and user-friendly. That is no problem for me. I will help you with the following skills. # CI/CD pipeline - Jenkins, Codefresh - Git, Bitbucket - Docker, Kubernates - AWS, GCP - C/C++ # Web development - HTML5, CSS3, JavaScript, Vue, React, Angular - Node.js, Ruby on Rails, CodeIgniter, Laravel framework - MySQL, MongoDB # Mobile development - swift, kotlin 3) How will i work? I will answer all the questions that might interest you. I will make sure that my solutions will become an important part of your life so you will return to it day after day. You will see my hidden ability when you are at risk!!! Thanks again and I hope to hear from you in the near future. Best regards, Stepan Romanchuk
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    web3.js
    Ethereum
    Cryptocurrency
    Smart Contract
    Bitcoin
    Blockchain
    React
    Ruby on Rails
    Node.js
  • $40 hourly
    Hello! My name is Kirill and I am a full-stack developer. I worked both in the company and for myself. Projects in which I participated as a developer can be found in the portfolio. I write all the code cleanly, adhere to the validity and commenting. For me, it is important to communicate with the client, for a complete understanding and implementation at the highest level of all assigned tasks. Also, I always evaluate the project in order to accurately negotiate the terms and invest in them, time is money. For every client, I propose my ideas on how to improve, make a more profitable website. -Blockchain development » PancakeSwap & UniSwap » Custom Blockchain and DApps/DeFi/DEX, Swap, Liquidity » Cryptocurrency Fork, Yield-Farming, Staking, Lottery, Referral » Cryptocurrencies. NFT marketplace, » Smart Contract (ERC20, BEP20, ERC721, ERC1155) » Solidity, Truffle, OpenZeppelin, Golang, Rust, Web3Js - Web development: » HTML5, CSS3, Bootstrap, jQuery » Node, ReactJs, NextJs, VueJs, NuxtJs, TypeScript, AngularJs. » Python, PHP, CodeIgniter, Laravel » WordPress(Ecommerce, Woocommerce, Shopify,Wix) » MongoDB, PostgreSQL, SQLServer, MySQL, MariaDB, Write to me and we will discuss your project in detail. Also, I am ready to solve problems related to your site. Poorly displayed content, script does not work, completely redo the page or something else - I am always at your service. I hope for fruitful cooperation with everyone! I look forward to hearing from you!
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Ethereum
    Blockchain
    web3.js
    Rust
    TypeScript
    Vue.js
    Golang
    Angular
    Laravel
    Node.js
    React
    PHP
    HTML
    JavaScript
  • $60 hourly
    I am a senior full-stack developer with more than 6 years of experience working for a variety of clients, from individuals to corporations. I have developed web applications and interactive bots in crypto, healthcare, marketplace, retail, art, NFT, AI and other industries. I pride myself on providing frequent, professional and amicable communication, respecting timeframes, aiming to think outside the box and helping clients to build successful products. 🛠 Front-end: React JS / Redux / JavaScript / TypeScript / HTML5 / CSS3 and a lot of related libraries and technologies 🛠 Back-end: Python / NodeJS / ExpressJS / REST API / Flask 🤖 AI: ChatGPT / OpenAI API / StableDiffusion 🗄️ Databases: MongoDB / PostgreSQL / MySQL / Firebase 🔑 Blockchain (web3): Solidity (smart contracts) / WalletConnect / Alchemy / ethers.js 📱Telegram bots: Python / aiogram / Telegram API 🛠 API integration: Twitter API / Telegram API / Spotify API / Google Calendar API / Web3Modal etc. 🕸️ Web scraping: Python / Selenium 💻 6+ years in software development ⏱️ Delivery in a timely manner. Focused on results instead of hours 💼 40+ completed projects 💬 Clear, friendly and proffesional communication 🗓️ Full-time availability
    vsuc_fltilesrefresh_TrophyIcon Solidity
    MongoDB
    MySQL
    CSS
    JavaScript
    Data Visualization
    Smart Contract Development
    Front-End Development
    Telegram API
    HTML
    Bot Development
    React
    Web Development
    Flask
    Python
  • $35 hourly
    I'm experienced software engineer from Ukraine. My expertise include: - development of platforms based on blockchain technologies (nft marketplaces, dapps, bridges, cryptocurrency payment integration, custodian wallets etc.) - development of scale systems - development of web apps Tech stack: - Golang, C++, Python, Solidity (ERC20, NFT (ERC721, ERC1155)) - Postgresql, Mysql - EVM based blockchains, stellar
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Blockchain Architecture
    Ethereum
    Blockchain
    NFT Marketplace
    Smart Contract
    Blockchain Development
    DApps
    NFT
    Docker
    Golang
    Kubernetes
  • $90 hourly
    ✓ I will create UI UX for your project. ✓ I will create front-end development of any complexity in your project. ✓ I will create the MVP of your product. 🔵 Insightful, strategic, top-level digital design, development, and social media support. 🔵 I help our clients cut down production costs and hit their business goals. 🔵 I help startup owners validate and launch their crypto business in no time. And help them look like they are already a multi-million dollar business. ✓If you need not just a designer, but a person passionate about the crypto industry, then you've come to the right place. ✓ In my work, I do my best to meet client expectations and deadlines, while being guided by a user-centered design philosophy. I am always available for chat or iMessage to keep things running smoothly. ✓I'm a specialist in the design of crypto projects, as that's where trendy and stylish design is always needed. ✓ I am a UI UX designer with 5 years of experience. My Skills • Web design (UX/UI); • Mobile design (UX/UI); • HTML\CSS • Webflow • React/Next.js/Vue.js • API - GPT and other • Proposing an art direction; • User flow creation; • UX strategy; • Mindmap / Customer Journey Map creation; • Landing page design; • Style & colour guideline creation; • Dashboard design; Have any questions? Feel free to contact me!
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Blockchain
    Ethereum
    User Interface Design
    Startup Company
    UX & UI
    WordPress
    Prototyping
    UX Research
    Website Redesign
    Interaction Design
    Webflow
    Landing Page
    Web Design
    User Experience Design
  • $40 hourly
    I'm an ambitious technology professional with 10+ years of experience developing highly scalable and highly maintainable complex IT sollutions, leading teams at various levels of involvement, and writing detailed product architecture documentation. My specialties include but are not limited to Software architecture design, Microservice architecture design, UI/UX best practices, Team management, JavaScript, TypeScript, Node.js, NestJs, React.js, Redux, Reactive Programming, Angular, Database design and database optimization. Also Data Visualization, and Data integration, API and all that stuff including numerous libraries for UI, State management, forms and so on and so on. Well, I am still able to do it all manually, if you have time and are keen to create a really unique product. Speaking about mobile apps development - I build cross-platform mobile app development on React Native that will work both on Android and iOS. Your product will get approval not only from investors, and delight users but positive feedback even from competitors. I have worked on different types of projects: 🔸 Management system for the logistics company (covered all 3 tiers of the supply chain) 🔸 Recruiting Platform 🔸 Comparison platform and a review of banking services 🔸 CRM for a real estate developing company 🔸 Influencer's community-driven social network 🔸 Fintech/ensure tech startup for single invoice insurance 🔸 Fleet management system 🔸 OnDemand applications (taxi, delivery, moving services) Drop me a line, and let's do some web magic together!
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    Google Cloud Platform
    Docker
    Microservice
    DevOps
    Redux
    React
    PostgreSQL
    React Native
    MongoDB
    TypeScript
    Node.js
    Angular
    JavaScript
    Amazon Web Services
  • $80 hourly
    As a full-stack developer with 12 years of extensive experience in backend, frontend, and mobile development, I offer a wealth of expertise and a proven track record of success. Throughout my career, I have thrived in various roles including developer, manager, team lead, and CTO. I have successfully completed projects for several prominent cellular carriers and numerous other companies. My expertise extends to developing complex systems such as CRM and LMS from scratch, emphasizing my capability to take projects from initial concept through to fully deployed and revenue-generating solutions. With a strong focus on innovation and quality, I am ready to help your business achieve its technology goals and drive success.
    vsuc_fltilesrefresh_TrophyIcon Solidity
    web3.js
    Vuex
    NodeJS Framework
    CI/CD
    React Native
    NestJS
    TypeScript
    Vuetify
    Git
    Node.js
    Vue.js
    JavaScript
    PHP
    Laravel
  • $40 hourly
    Blockchain/Back-end architect with 3 years of experience. During my 3-years career as Blockchain architect, I successfully finished a lot of projects such as: Cryptocurrency exchanges, Decentralized marketplace based on Ethereum smart-contracts, Crypto-games development, Cryptocurrency integration, Mobile crypto-wallets, Multi-signature wallets, Cross-chain bridges, TG bots.
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    Golang
    Blockchain
    Rust
    C++
    JavaScript
    Node.js
  • $37 hourly
    Java, Android, Solidity, PHP, JavaScript, Go, MySQL, SQLite, PostgreSQL, MongoDB, Spring, Hibernate, Vaadin, Truffle, Http/Https, TCP, UDP, websockets, JSON, XML, CSV, ButterKnife, Retrofit, RxJava, JavaMail, BouncyCastle, c3po, Gson, Jackson, web3j, web3js, web3.php, Maven, Gradle, Multithreading, Crashlitics, MVP-pattern, Cryptography(AES, EC, ECDH, ECDSA, MAC, KDF, PGP, PKI, RSA, SHA), Ethereum, Geth, Parity, MetaMask
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    Ethereum
    RxJava
    Cryptography
    Java
    Android
    JavaScript
  • $45 hourly
    I've been working with Javascript language and frameworks for 3 years on Front-end development. My strongest skill is React.JS and Vuejs, Nodejs. Frontend stack with React.js and Vue - Modern Javascript (ES6, ES7, ES8) - State management (Redux with redux-saga, redux-thunk, Mobx) - Code quality tools (ESLint, Prettier) - Building tools (Babel, CRA, Webpack, Rollup) - Styling (Module CSS, styled-components) - UI toolkit (Material-UI, Semantic UI, Antd, Bootstrap) - Unit testing (Jest, Enzyme, Karma, Mocha) - PWA (webworkers, redux-persist, redux-offline) - Performance analysis Front-end skills - Vue.JS, Nuxt.JS, Buefy, Vuetify - Svelte, Sveltekit, Sapper - HTML5/CSS3, SCSS/LESS - jQuery, Bootstrap - Typescript - Styled Components, SCSS, CSS Module - Data Visualization: PowerBI, D3, ThreeJS, Gephi - Web3, Metamask, NFT Games
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    Virtual Reality
    3D Modeling
    Unity
    Unreal Engine
    Adobe Animate
    3D Animation
    TypeScript
    Blockchain
    CSS 3
    web3.js
    Node.js
    Ethereum
    Smart Contract
    React
  • $80 hourly
    I'm Mark, the CEO of RedDuck, a blockchain development agency. With extensive experience in DeFi consulting and Web3 project development, I provide end-to-end blockchain solutions tailored to your needs. My expertise covers everything from smart contract development and tokenomics to legal support for blockchain projects. 
🦾 Services Offered:
 • DeFi consulting (strategy, tokenomics, liquidity management) • Full-stack Web3 development (dApps, NFTs, smart contracts) • Multi-chain integration (Ethereum, Solana, Polygon, TON, Optimism, Tron, BNB, Arbitrum, and other EVM) • DeFi development (staking, lending, DEX, farming and RWA, etc.) • Cross-chain bridges and interoperability solutions • Custom token creation (ERC-20, BEP-20, SPL, etc.) • NFT marketplaces and minting platforms • DAO setup and governance mechanisms • Crypto payment gateways and wallet integration • Development of blockchain-based gaming platforms (GameFi and GambleFi) 🏆 My company - RedDuck, has successfully completed numerous award-winning projects, securing top positions in prestigious hackathons, including the Kyiv Tech Summit and EthKyiv 2024. 📌 I am dedicated to offering exceptional services with fluent English and clear communication, focusing on understanding your business goals beyond just writing code.
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Smart Contract
    DApp Development
    Tokenomics
    Cryptocurrency Forking
    DApps User Experience
    Crypto Wallet Development
    Smart Contract Development
    Ethereum
    Blockchain, NFT & Cryptocurrency
    Blockchain Development
    Blockchain Platform
    Web3
    Blockchain
    NFT
  • $40 hourly
    🔸 100% Job Success 🔸All 5 ⭐️ review 🔸TOP 1% of Upwork Agencies 🔸$600k + Earned Hey Upwork Friends 👋 I'm Max, here to help with your Blockchain and Full-Stack needs. 🔗 Blockchain with Solidity: Got a cool idea for the blockchain world? I can help bring it to life with smart contracts and DApps. 💻 Full-Stack Development with Python (Django) and React.js: Need a website that looks great and works smoothly? I'm your guy for building awesome web apps. Why Pick Me? 💡 I do two things really well: Blockchain and Full-Stack Development. 🎯 I focus on delivering great work, on time. 🤝 I like keeping things clear and simple when we talk. 👀 Always up with what's new on Upwork. Got a project in mind? Let's chat and make something amazing together! Buzz words: Blockchain JavaScript Smart Contract Cryptocurrency Ethereum Solidity API Web Development PHP Blockchain Development Node.js Blockchain Architecture React API integration Smart Contract development Blockchain platform Blockchain NFT & Cryptocurrency Web design dApp development HTML Java Crypto wallet Blockchain security DeFi Bitcoin NFT minting Uniswap Web3 Crypto Asset Python NFT marketplace NFT art NFT marketing NFT collection generation Web Application Marketing Strategy Marketing Research Lead Generation Java Software Architecture & design Bridge Java MongoDB React Native MERN stack Cryptography Compliance FinTech Security Token development Payment gateway integration iOS Android Figma Ethers.js C++ Laravel Vue.JS Angular 5 NFT metadata Smartphone Android iOS Python Node.JS API development RESTful API Database Architecture Database design Web3.js Database development Data Scraping CSS NFT dApps Initial Coin Offering Multichain platform Crypto Exchange Platform App development eCommerce website development Next.JS JavaScript React Web Application Web Development CSS API Integration API HTML React.js Amazon Web Services PHP Node.JS Next.JS Web Design MongoDB Node Laravel RESTful API MySQL Tailwind CSS Website SaaS Redux Figma Express.js HTML5 Landing Page PostgreSQL React Native TypeScript Nest.JS Node.js framework jQuery Responsive Design Vue.js Full-stack development AI development Backend CSS 3 Database Architecture eCommerce Graphic Design Heroku Material Design Search Engine Optimization SEO System Architecture Android Android App API development Chart.js D3.js Desktop application DevOps Docker Git GitLab iOS development Mobile app Prisma Project management Prototype Design REST API RESTful Architecture SSCS Software Architecture & Design SQL T3 Stack Mobile App Development Android iOS React Native Smartphone JavaScript iOS Development User Profile Creation React API integration Android app development Hybrid App Development In-App Purchase Flutter Node.JS Tablet Firebase Android development User authentication TypeScript Native App Development Camera Push Notifications PHP Mobile App Microphone MySQL Map integration Mobile App Design App Development Business with 1-9 Employees CSS HTML Social Media Account Integration Location-based Services Web development Chat & Messaging Software API Web application Personal Computer In-App Search In-App Advertising Application Security Business with 10-99 Employees AWS Amplify Firebase Realtime Database Full-stack development PostgreSQL REST API Google Cloud Platform iPad App Development MongoDB Data Analysis Redux Next.JS Back-End Development Cross Browser & Device Compatibility Database Development UX & UI 𝗕𝘂𝘇𝘇 𝘄𝗼𝗿𝗱𝘀 Back-end: Node.js (nest.js) TypeScript JavaScript, web development, cloud services, Postgresql, MySQL, Redis, MongoDB, web platform, react, Blockchain JavaScript Smart Contract Cryptocurrency Ethereum Solidity API Web Development PHP Blockchain Development Node.js Blockchain Architecture React API integration Smart Contract development Blockchain platform Blockchain NFT & Cryptocurrency Web design dApp development HTML Java Crypto wallet Blockchain security DeFi Bitcoin NFT Buzz words mini-apps: Telegram API Telegram Chatbot Development Bot Development Python Scripts & Utilities Data Scraping Web Scraping Automation ChatBot Bot Framework Scripting Community Management Game Development Game Design Bot Game Consultation Algorithm Development Data Entry Node.js Data Extraction AI ChatBot AI Bot Community Management Online Chat Support API Development iGaming Task Automation iOS Smartphone JavaScript React Web Application Web Development CSS API Integration API HTML React.js Amazon Web Services PHP Node.JS Next.JS Web Design MongoDB Node Laravel RESTful API MySQL Tailwind CSS Website SaaS Redux Figma Express.js HTML5 Landing Page PostgreSQL React Native TypeScript Nest.JS Node.js framework jQuery Responsive Design Vue.js Full-stack development AI development Backend CSS 3 Database Architecture eCommerce Graphic Design Heroku Material Design Search Engine Optimization SEO System Architecture Android Android App API development Chart.js D3.js Desktop application
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Project Management
    Business Development
    Search Engine Optimization
    Sales Strategy
    Elearning Design
    Scrum
    Rust
    Solana
    Ethereum
    Django
    Python
    Golang
    API Integration
    CSS
    JavaScript
    Smart Contract
    Blockchain
    Web Application
    Web Development
    React
  • $100 hourly
    Participated as blockchain expert and world-class adviser in numerous ICO, CEO of the Illuminates team which took care of blockchain solutions integration, project realization assuring launch and successful completion. Specializing in services and solutions for web3, AI, metaverse, innovation startups, accompanying a whole lifespan of a project, investor relations, fundraising and market making services. As a seasoned entrepreneur and fin-tech expert, I perfectly understands investors' expectations, startup's pain points, and how to build profitable relationships between them. Providing comprehensive in-depth startup assessment I ensures project readiness for approaching investors and a full-scale launch. Have an experienced in-house team of blockchain developers, who deliver the best solutions according to clients' needs and provide turnkey solutions for more than a dozen of clients. Located: DUBAI, UAE
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Blockchain, NFT & Cryptocurrency
    Branding & Marketing
    White Paper
    Marketing Strategy
    HTML5 Canvas
    Fundraising
    Python
    Blockchain
    B2B Marketing
    Blockchain Tokenization
    NFT Marketplace
    Angular
    Business Plan
    Laravel
    Product Design
  • $50 hourly
    Web blockchain development. Over the past 6 years, I have developed and delivered numerous web applications using JavaScript, Vue.js, NodeJS, etc. I always do my best to provide my clients with clean, organized code, responsive and perfect working applications.
    vsuc_fltilesrefresh_TrophyIcon Solidity
    API
    Smart Contract
    Ethereum
    Blockchain Development
    web3.js
    AngularJS
    Vue.js
    Google Chrome Extension
    Web Application
    MongoDB
    MySQL
    Node.js
  • $50 hourly
    👋 I’m a senior Full-Stack Engineer with 8 years of professional experience. Originally I'm from Ukraine, Lviv 🇺🇦, But now live in Estonia 🇪🇪 (GMT+3). ⬇️ Looking for a JavaScript expert? You’re on the right way! ⬇️ Tech Stack: 🔹 NodeJS | Koa, Express.js, SocketIO, Mocha. 🔹 JavaScript | React.js, Next.js, Vue.js, Nuxt.js, TypeScript, Angular, React Native. 🔹 PHP | Laravel, Symfony. 🔹 Databases | Mongo DB, MYSQL, PostgreSQL, GraphQL. 🔹 HTML/CSS | SASS, CSS3, HTML5, Bootstrap, XML. 🔹 PWA | Responsive UI | Cross-browser Compatibility. 🔹 Git flow | CI-CD | Pipelines. 🔹 JIRA, Agile, SCRUM. Why me? ✅ 8 years in Web Development. ✅ Solid expertise in the development of CRM's, real-time apps, high-load, low-latency systems, Web and Mobile apps, RESTful API, etc. ✅ Solid experience in projects as a Team Lead, Architect. ✅ Industries: Health Care, Finance, Social Media, Data Management, Insurance. I can offer You the following: 🔹 A free consultation and development proposal with professional recommendations and estimation for your web or mobile project. 🔹 Back-end and front-end development. 🔹 CTO as a Service. 🔹 End-To-End product development. 🔹 Software architecture design. Feel free to get in touch with me and let's implement your ideas into real life 🚀 I am looking forward to working with you ! _______________ Highlighted skills: Web development, Mobile development, Application Development, Front-end Development, Back-end Development, JavaScript (JS), React (React.js, ReactJS), React Native (RN, ReactNative), Node.js (Node, NodeJS), NestJS (Nest) GatsbyJS (Gatsby), NextJS (Next), Angular (Angular.js), Vue.js (Vue, VueJS), Nuxt.js (Nuxt), TypeScript (TS), PHP (Laravel, Slim, Symphony, Yii2)
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Blockchain
    NFT Marketplace
    Symfony 4
    React Native
    iOS
    TYPO3
    Laravel
    Vue.js
    Angular
    React
    Node.js
    JavaScript
    TypeScript
    Docker
  • $45 hourly
    It only drives me faster when someone says an idea can’t be implemented. I thoroughly cover clients’ demands and drive business results by working with server-side technologies (NodeJS, ExpressJS, NestJS) in combination with front-end (React, React Native, Angular). Check some facts about me: • 3000+ hours worked on Upwork • 70+ successfully executed projects • Excellent troubleshooting skills • Exceptional Top Rated Plus engineer + • 48 satisfied customers
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Large Language Model
    Generative AI
    Computer Vision
    Machine Learning
    Blockchain Development
    DApps
    DeFi
    Smart Contract Development
    NFT Marketplace
    Web3
    React Native
    Python
    Rust
    React
  • $50 hourly
    Hello I am a professional blockchain fullstack developer have worked on more than 100+ individual projects, sites and dozens of defi protocols for swap, lending, staking, algorithmic stable coin over the course of my career. Meanwhile, I experienced uniswap, pancakeswap, sushiswap. compound, yearn, ESD on ethereum, binance smart chain, tron and fantom with solidty, web3, react, geth, lachesis, etc. Also I led smart contract, blockchain backend and frontend development and supported them after launch and experienced to have TVL from 30M to 200M for 1 week or 2 months. I will pay attention to the requirements very attentively, which makes me the perfect fit to develop the project exactly how my clients want. I'll continue to search for better solution which help me to optimize and increase the performance of my projects. Over the last 10 years, I have developed countless backend, frontend and many smart contracts and dapp with absolute 100% client satisfaction. Thanks for careful looking into my profile.
    vsuc_fltilesrefresh_TrophyIcon Solidity
    Node.js
    Cryptocurrency
    DApps
    Smart Contract
    web3.js
    React
    Blockchain
    PHP
  • $40 hourly
    🌟 𝗪𝗲𝗯 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗘𝘅𝗽𝗲𝗿𝘁 𝘄𝗶𝘁𝗵 𝟭𝟬+ 𝗬𝗲𝗮𝗿𝘀 𝗼𝗳 𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝘆 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 🚀 𝗣𝗿𝗼𝘃𝗲𝗻 𝗧𝗿𝗮𝗰𝗸 𝗥𝗲𝗰𝗼𝗿𝗱 𝗼𝗳 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 With over a decade in the industry, I’ve helped small startups achieve critical milestones and guided large businesses in building resilient internal development cultures. My experience spans diverse challenges, ensuring adaptable solutions for every project. 🛠️ 𝗧𝗮𝗶𝗹𝗼𝗿𝗲𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀𝗲𝘀 Clear communication is a cornerstone of my approach, ensuring all details are addressed and development progresses predictably. Crafting development workflows that meet your specific needs is a top priority. 📈 𝗦𝘁𝗮𝘆𝗶𝗻𝗴 𝗔𝗵𝗲𝗮𝗱 𝗼𝗳 𝗧𝗿𝗲𝗻𝗱𝘀 By staying in sync with the latest front-end trends, I ensure my skills and methodologies align with the industry's best practices. This guarantees modern, efficient, and effective solutions for your projects. ⚙️ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 & 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 - Core Technologies: Proficient in 𝗝𝗮𝘃𝗮𝘀𝗰𝗿𝗶𝗽𝘁, 𝗧𝘆𝗽𝗲𝗦𝗰𝗿𝗶𝗽𝘁, 𝗥𝗲𝗮𝗰𝘁 and its ecosystem. - Web Development: Expertise in building SPAs, mobile/desktop web applications, and interactive dashboards using modern front-end frameworks and libraries. - Code Quality & CI/CD: Skilled in implementing linting, unit testing, end-to-end testing, and 𝗖𝗜/𝗖𝗗 pipelines with tools like 𝗝𝗲𝗻𝗸𝗶𝗻𝘀, 𝗖𝗶𝗿𝗰𝗹𝗲𝗖𝗜, 𝗮𝗻𝗱 𝗧𝗿𝗮𝘃𝗶𝘀 𝗖𝗜. - DevOps & Deployment: Experience in containerized deployment (𝗗𝗼𝗰𝗸𝗲𝗿), infrastructure as code, and optimizing front-end release processes (𝗚𝗶𝘁𝗵𝘂𝗯 𝗔𝗰𝘁𝗶𝗼𝗻𝘀, 𝗔𝗪𝗦). - Web3 & Blockchain: Delivered blockchain projects, including deploying Gnosis Safe clones, tokenization platforms, and stablecoin ecosystems on 𝗘𝘁𝗵𝗲𝗿𝗲𝘂𝗺-𝗰𝗼𝗺𝗽𝗮𝘁𝗶𝗯𝗹𝗲 𝗯𝗹𝗼𝗰𝗸𝗰𝗵𝗮𝗶𝗻𝘀. - Collaborative Development: Strong background in building shared 𝗨𝗜 𝗹𝗶𝗯𝗿𝗮𝗿𝗶𝗲𝘀, working closely with designers, and leading development teams on feature implementation and technical initiatives. 💡 𝗖𝗼𝗹𝗹𝗮𝗯𝗼𝗿𝗮𝘁𝗶𝘃𝗲 & 𝗥𝗲𝘀𝘂𝗹𝘁𝘀-𝗗𝗿𝗶𝘃𝗲𝗻 I enjoy working closely with designers to create intuitive product features while also excelling in technical, framework-driven initiatives. 🛠️ 𝗛𝗼𝗯𝗯𝗶𝗲𝘀 & 𝗣𝗮𝘀𝘀𝗶𝗼𝗻 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 pcb design, soldering, power electronics (bms, dc/ac inverters), firmware programming 📬 𝗟𝗲𝘁’𝘀 𝗕𝘂𝗶𝗹𝗱 𝗦𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝗚𝗿𝗲𝗮𝘁 𝗧𝗼𝗴𝗲𝘁𝗵𝗲𝗿! I'm excited to learn more about your business needs and start crafting impactful solutions that drive results. A list of technologies I'm working with, so you can find me with keywords: 🌐 Languages and Frameworks: JavaScript, TypeScript, React, Next.js, Angular, Redux, Zustand, Electron 🎨 Components and Styling: Tailwind CSS, Material UI, SCSS, Styled-Components, CSS-Modules, PostCSS 🔧 Build, Linting, Formatting and Testing: Webpack, Parcel, Prettier, ESLint/TSLint, Jest, Puppeteer, Lerna 🚀 DevOps: Docker, AWS (ECS, EC2, ECR, S3, CloudFormation), Terraform, Jenkins, GitHub Actions 🔒 Crypto: Ethereum, Web3, ERC20, ERC721 🔌 API: WebSockets, GraphQL, Postman, OpenAPI/Swagger
    vsuc_fltilesrefresh_TrophyIcon Solidity
    CI/CD
    DApps
    Jest
    Agile Software Development
    React
    Node.js
    JavaScript
    TypeScript
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