I am a highly experienced Senior Web Developer and System Architect with over 15 years of expertise in web development. I specialize in Vue.js/Nuxt.js for frontend development and Node.js/Express.js/Nest.js for backend systems. Additionally, I am proficient in working with existing projects using PHP Laravel, Symfony, and WordPress plugin development. As a Team Lead, I have successfully managed and solved complex challenges on both the frontend and backend, either independently or with a team. If you’re tired of working with non-professionals, I’m the right choice for your project. Let’s bring your ideas to life with precision and efficiency! Services I Offer Frontend Development: • Creation of responsive interfaces using HTML5, CSS3, Bootstrap, Less, Sass • Frontend architecture design for single-page applications (SPA) with Vue.js, Nuxt.js, and Angular Backend Development: • Backend architecture design using Node.js frameworks like Express.js and Nest.js • Full-stack SPA architecture design with technologies like Meteor and Telescope Testing & Automation: • Test-driven development (TDD) using Mocha, Jasmine, Karma, Jest, and Selenium • Automation of frontend tasks such as minification, compilation, unit testing, and linting using Webpack and Vite • Setting up CI/CD pipelines for seamless development workflows Database Management: • Administration of both NoSQL databases (MongoDB, CouchDB, Redis) and SQL databases (MySQL, PostgreSQL) Deployment & Hosting: • Deployment of websites and applications on Amazon AWS or any server environment using Docker containers With a proven track record and a comprehensive skill set, I’m here to ensure your project succeeds beyond expectations. Let’s collaborate to make your vision a reality!

As an ex-FAANG software engineer with ~15 years of industry experience, I've honed my skills across a diverse range of projects, including marketing websites, applications for digital agencies, internal and external tools at Facebook, civic technology initiatives, and SaaS products. I'm passionate about open source, developer experience, clean code, and maintainable software. My expertise includes technologies such as ES6, TypeScript, PHP, HackLang, Python, HTML5, CSS3, GraphQL, REST, Redux, React, and React Native. I have a proven track record of delivering high-quality, scalable, and secure solutions that meet and exceed client expectations. I am also an active contributor to the open-source community and have experience speaking at events like TEDxAlbaIulia and Techsoup webinars. As a freelancer on Upwork, my goal is to apply my extensive knowledge and skills to help you achieve your project goals and ensure your complete satisfaction. Let's discuss how I can bring value to your project and create a successful partnership together!

I’m a front-end web and mobile developer with over 15 years of experience delivering high-quality, performance-driven applications. My expertise lies in building responsive, user-friendly interfaces using modern web application frameworks and multi-platform mobile application frameworks. On the web, I’ve developed numerous Single Page and Server-Side Rendered Applications using React, Angular (1 & 2+), Vue, Next.js, Nuxt.js, Svelte, and Remix. I focus on writing clean, maintainable code with a strong emphasis on UI/UX, accessibility, and performance across all devices. For mobile app development, I work with multi-platform mobile application frameworks such as Flutter, React Native, NativeScript, Ionic, Cordova, and PhoneGap. I develop applications that meet business requirements, follow platform-specific design standards, and ensure a consistent user experience across iOS and Android. In addition to front-end development, I have solid experience with Node.js for backend API development, enabling me to build and integrate RESTful services, connect to databases, and support full-stack application needs when required. I’m passionate about building intuitive, scalable digital products and enjoy working with clients who value clean design, solid architecture, and timely delivery. If you're looking for a reliable developer to bring your web or mobile project to life—let’s connect and make it happen.

✅ I'm a senior full-stack web & AI developer with 12+ years experience in web apps, websites, automations, API integrations & AI development 💻 Tech stack: PHP Node.js Python Symfony Laravel Django React.js Vue.js Docker AWS 🛠️ AI & tools: Claude OpenAI ChatGPT Dall-e Stable Diffusion Send a message or invite me now and I will provide you with a free consultation! More details about me: I'm a Full-Stack AI & Website Developer with 12+ years experience in Node.js, PHP, Python, API integrations and AI development. I provide AI development services including building websites with Claude AI, Replit, Lovable and other AI tools. I can help you to complete and polish your SaaS MVP or develop a website from scratch. Additionally I can extend your AI web application with a custom code, scripts, API integrations and advanced back-end and front-end. Such approach allows to easily build MVPs for SaaS solutions, ERP systems, CRM, corporate CMS websites, directories, marketplaces and other platforms. You are very welcome to message me and get a quick consultation about AI development, AI integrations, scoping your project and quote. Just send me a short brief and let's talk! I am also a CTO of Zimalab web development team. We develop high-quality custom web apps, AI solutions, eCommerce platforms, MVPs, SaaS products, ERP/CRM systems, API back-end integrations and business automations. My skills: ✓ AI & Vibe coding - Claude, Replit, Lovable, openAI, ChatGPT ✓ Bubble, Retool ✓ PHP, Symfony, Laravel, Python, Django, FastAPI - 12+ years ✓ Wordpress Woocommerce ✓ DB – MySql, PostgreSQL, MongoDB ✓ JS - jQuery, jQuery UI, Angular.js ✓ JS Frameworks - Node.js, Meteor.js, React, Next.js, Gatsby.js ✓ Experience with utilities – imagemagick, ffpmeg, sphinx and elasticsearch, mlt framework ✓ Third party services – Google, LinkedIn, Facebook, Amazon AWS S3, EC2, Amazon Cloudfront, OTA booking platforms APIs ✓ Payment systems – PayPal, Stripe, Authorize.net, JVZoo Key website development services AI Web Developer | AI Website Developer | AI Integration Developer Claude Developer | Lovable Developer | Replit Developer Custom Web apps | SaaS | MVP development Websites | API integrations | API development ERP | CRM | Automation | Dashboard Tech stack AI - Claude | ChatGPT | OpenAI | Replit | Lovable | Bubble | Vibe Coding Back-end - PHP | PHP Laravel framework | PHP Symfony framework | LAMP | Python | FastAPI | Django | Node.js Frontend - Javascript | HTML | CSS | JavaScript | jQuery | Bootstrap Devops - AWS EC2 | AWS S3 | AWS Cloudfront | AWS Lambda | git | Github | Cloudflare | CDN Database - MySQL | MongoDB | PostgreSQL | Supabase My experience includes back-end development of hotels booking & management platform, music lessons learning platform, video stock website, social network, paid membership websites, online booking systems, 3rd party API integrations, RESTful APIs development and even creation of own MVC+ORM framework. I am highly experienced with building a web system architecture from scratch and enhancement of existing & legacy php code. AI experience: Claude AI developer for Customer Management Portal Development. Building CI/CD workflow, UI/UX development, bug fixes Bubble Developer for Report Generation Portal. Configuring API integrations with ChatGPT and Claude AI, UI/UX enhancements, bug fixes Back-end Developer for AI Image Generation Portal. System Architecture, backend API development, API integrations with Dall-E, Stabble Diffusion, Chat GPT, Replicate. Queue management, high load & performance optimization, image processing, AWS setup Full-stack Developer for AI Educational Tool for Teachers. Chat GPT API and Stripe integration, dashboard development, PDF generation, UI/UX development Web apps and Websites: Back-end of ERP | CRM solution for chain of car bodyshops with a custom dashboard on PHP | Symfony | HTML | CSS | Javascript Back-end Development of SaaS solution for SMS marketing and API integrations with Shopify API and Twilio API on PHP | Symfony | HTML | CSS | Javascript and development of MVP which launched within 3 months Custom Software and Backend Development of Hotel Booking solution and API integrations with Cubilis | RezExchange | Smarthotels on PHP | Symfony | HTML | CSS | Javascript Full-stack and Back-end Web Development of SaaS dashboard for Security Company on PHP | Symfony | Vue.js | HTML | CSS Back-end and Front-end development of Video Directory Website for Media Company on PHP | Symfony | HTML | CSS | AWS S3 | ElasticSearch Custom CMS and back-end Development of Course Booking platform for chain of Linguaschools on PHP | Symfony | HTML | CSS | Javascript Back-end development of VC funds directory on PHP | Laravel | HTML | CSS | Javascript - I'm good in writing English, available for direct communication - I follow PSR standards, experienced with TDD, SCRUM Updated 11 Mar 2026

An enthusiastic Front End developer who has built creative and quality oriented applications over the years. Client-focused, professional, perfectionist, curious, clean-technology lover, interested in cutting edge web technologies. For the last 3 years, I was developing SPA (Single Page Applications) with Angular and React JS based on different backend layers, like Node, PHP. I like the new Angular 2 and TypeScript. Here are the technologies I have been working. ClientSide: * Pure JavaScript; * ES2015 (ES6) * TypeScript Libraries\Frameworks: -- Angular 5 -- React JS -- Vue JS -- Knockout JS * Twitter Bootstrap * HTML5, CSS3 * LESS/SASS ServerSide: * JS (Node) (Meteor, MEAN.io, socket.io, express, grunt, bower, mongoose, etc..) * MySQL, SQLite, MongoDB VC: Git (via Github, Bitbucket, Stash) CMS: Wordpress OS: Windows (Primary), macOS

Building Products, Reimagined. Building a successful product isn't just about writing code—it's about making the right product and engineering decisions from day one. I help startups, founders, and product teams architect, build, and scale cross-platform products from idea → launch using React Native, Expo, modern AI workflows, and scalable engineering practices. With 8+ years of experience as a Mobile Engineer, I specialize in building production-ready applications for iOS, Android, and Web that are fast, maintainable, and designed to grow with your business. I don't just build apps—I help build products. From refining ideas and defining MVP scope to architecture, development, App Store & Play Store releases, and post-launch improvements, I partner with teams throughout the entire product lifecycle. ━━━━━━━━━━━━━━━━━━━━━━ What I Build Whether you're validating a new idea or scaling an existing product, I can help with: • Cross-platform mobile apps (iOS & Android) using React Native & Expo • AI-enabled applications, intelligent workflows, agents, and automation • MVPs and rapid prototypes for early-stage validation • Production-ready applications built for long-term scalability • Unified Web + Mobile products (React Native, Expo, Next.js, NX Monorepos) • Backend platforms with Supabase, Firebase, Clerk, Better Auth, and modern cloud services • Real-time and data-driven applications • App modernization, refactoring, and performance optimization • App Store & Play Store releases and production readiness ━━━━━━━━━━━━━━━━━━━━━━ My Approach I believe successful products are built through strong engineering, thoughtful product decisions, and modern development workflows. My approach combines Clean Architecture, SOLID principles, Domain-Driven Design (DDD), Design Patterns, and Test-Driven Development (TDD) with fast, iterative product delivery. Rather than simply delivering features, I focus on helping teams make technical decisions that keep products scalable, maintainable, and easy to evolve as they grow. Whether I'm joining an existing engineering team or leading development from day one, my goal is always the same: • Build products that scale • Ship faster without sacrificing quality • Reduce technical debt before it happens • Create predictable engineering processes • Collaborate closely with founders, designers, and product teams ━━━━━━━━━━━━━━━━━━━━━━ Typical Engagements ✔ Building an MVP from scratch ✔ Scaling an existing React Native application ✔ Technical leadership & architecture ✔ AI integration and intelligent workflows ✔ Modernizing legacy mobile applications ✔ Performance optimization ✔ App Store & Play Store production releases ✔ Long-term engineering ownership ━━━━━━━━━━━━━━━━━━━━━━ Why Clients Work With Me Clients don't hire me just because I know React Native or Expo. They hire me because I help reduce technical risk while accelerating product delivery. I combine: • Product thinking • Senior engineering execution • Modern AI workflows • Clear communication • Strong ownership • Startup experience across multiple industries Whether you need a senior engineer, technical lead, or long-term engineering partner, I can help turn your ideas into production-ready products that users love and businesses can scale. If you're building your next product, I'd love to hear about it.

Greetings! I am Artem, a highly skilled Full-Stack JavaScript Developer with expertise in web, gaming, and animation. With a robust 15-year career, including 12 years of proven expertise on UpWork, I have completed 88 projects, all receiving 5-star reviews and maintaining a 100% Job Success Score. As a Top Rated Plus freelancer, I have logged over 10,500 hours, demonstrating my commitment to excellence in developing JavaScript applications compatible with all browser-equipped devices. My portfolio ranges from simple games and single-page mobile applications to sophisticated MMORTS/MMORPG games and complex Rich Internet Applications (RIA) for animators and authors. My passion lies in tackling intricate and unique challenges in web and mobile development, with a special fondness for gaming and animation projects. My ultimate goal is to establish my own game development studio. I thrive in competitive work environments and am committed to delivering exceptional results. My professional journey began in 2011, developing casual mobile web games optimized for the then-new iPhone 3GS. Subsequently, I joined Narr8, contributing to an interactive platform for digital books and comics, outperforming Apple's iBooks. Here, I developed 'The Editor,' a tool empowering animators to create content for our platform. Post-Narr8, I initiated MnCreator and worked at KamaGames, focusing on a web app and admin dashboard for advertising management and analytics. Between 2014 and 2015, I was part of Parallels (later Odin, acquired by Ingram Micro), where I was instrumental in developing a UI Framework for rapid cloud-based product development, including parts of the Plesk panel interface. I continued my career at UpWork after that, where I worked on a huge list of different projects, from some small games and banners to huge projects for UpWork's Plus Clients. Key Skills: - Expert-level in JavaScript (es5 - es2025, whatever version you like), TypeScript, HTML5, CSS3, alongside a wide array of libraries and tools like React.js, Redux, Recoil, Grunt, Gulp, Webpack, Bootstrap, Tailwind, LESS, SASS/SCSS, and Handlebars. And whatever else. Believe me, just name it, and I either worked with it already, or I can handle it. - Development skills for mobile platforms (Android, iOS, Windows RT, Tizen), with basic knowledge in Java and Swift. - Proficiency in Node.js backend development, desktop applications (Node-WebKit/nw.js/Electron), mobile applications (PhoneGap/Cordova), and microcontroller software (Espruino, Onion Omega). - Knowledge of both SQL (MySQL, PostgreSQL, SQLite) and NoSQL databases (MongoDB and its forks). - Small, but useful experience with GraphQL - Junior-level skills in Java (Play Framework, Android development), PHP, and Swift (iOS development). - Basic understanding of C-based languages and ability to code simple things: C, C++, C#, and Objective-C (iOS development).

I'm an experienced Android, Windows, iOS and Firmware Reverse Engineer. I have a lot of experience in reversing applications, games, programs and systems. With +15 years of hands-on experience in Reverse Engineer and Malware Analysis, I am also a cybersecurity expert with experience in cybersecurity research and development at a world-class R&D laboratory in the field of Cyber ​​Operations. In this work, I gained experience in network traffic analysis, malware analysis and cryptography. My main skills: * Extract Data, Code, Algorithms, Signatures and Network Addresses from Android Apps, iOS App and Windows App * Deep expertise in Smali bytecode * Decompile Apk File and convert to full source code * Application Modification for Add, Remoave, Modify Functionalities * Bypass SSL pinning. Interception, Modification and Analysis of Network Traffic * Creation of Private API for a Applications or Programs * Decompilation, Debugging, Analysis and Modification of Native Android Libraries * Know arm and x86 assembler * Expertise in analyzing sophisticated malware using tools like IDA Pro, Ghidra, and x64dbg. * Have Experience in Reverse Unity, Cocos, Kony Android Apks * Debuggers, Disassemblers with Windows x86 and x64. * Creating Scripts/Plugins for Deobfuscation * Reversing iOS, Android Apps and Developing Tools to Automate * Server solutions (including serverless solutions) * interaction with BLE devices (BLE 4, BLE 5 Coded Phy) * Mobile apps Reverse Engineering (decompilation, creation of mods, API extraction, decryption) * Android APK patching and Binary Patching, Binary Decompilation * Root Detection and Emulator Detection Bypass * Network Traffic Analysis and Malware Analysis * Deobfuscation and Unpacking Applications * Web-Scraping/Crawling and Automation Expert * Browser Automation & Testing with Leverage Selenium, Multilogin, and Puppeteer * Data Analysis & Manipulation * Making custom tools for unpacking executable files as standalone tools and as plugins for debuggers * Reverse engineering eprom communication and ecu reverse engineering * firmware reverse engineering and hardware reverse engineering * Creating scripts/plugins for automatic and semi-automatic deobfuscation with IDA * Developing disk/storage/volume stack drivers * reversing iOS / android apps and developing tools to automate it * Advanced Web Scraping Techniques external APIs, uncovering hidden functionalities and potential enhancements through reverse engineering. * Digital Forensics Expert

Hi! I'm Serhii, a development architect with over 7 years of intense experience. I'm also a co-founder and CTO in Devurai. We're Top Rated Plus Upwork Agency which I'm very proud of! From a professional standpoint I'm a highly experienced project leader. Me and my team built numerous successful projects, using Node.js(Express or Nest.js) and Vue.js. We also love Angular, thou Vue became our main front-end framewokr. Through experienced and a broad skill base, I am able to organize project architecture of any kind, encompassing all levels of complexity to turn a project idea into a fully realized implementation. I know how to build working products, but more than that, I know how to build a team that works, getting the most from the talent on any project to deliver the desired outcomes.

JavaScript Fullstack Developer - React, React Native, Flutter, Angular, Ionic, Node.js Hi! My name is Maryna and I am a professional javascript developer with 9+ years track record. And I lead the team of JavaScript ninjas - Codemotion, the Best Upwork Agency in Kyiv, Ukraine in Web&Mobile Development from 2018 🏆 We don’t just code - we solve your business needs. Effectively and on time. Launch your project on schedule! We are a team of Ninja Developers focused on JavaScript. We deliver complex web and mobile applications development using React, React Native, Flutter,Angular.js, Ionic, Vue.js, TypeScript, Node.js Services • CTO as a Service • End-To-End product development for Startups • AIAD - AI assisted development as a structured, senior-controlled delivery system • Team extension Why us • Ninja style - the mission will be accomplished, you can just enjoy the delivery and the demos • Care about relationships. “Clients for life” and “same boat” approach • Close collaboration - the more you're involved the better the result is • Deliver 101% result with Agile • Great at remote work with various time zones • Our developers are fluent in English and learn skills extremely fast Company Profile • Providing development services starting from 2016 • Headquarters and R&D in East Europe, the sales office in the USA • 120+ team members (Senior 30%, Middle 55%, Junior 15%) and keep on growing • We take care of the team – awarded "Best IT employer in Ukraine" by the most trusted Ukrainian IT resource DOU.ua Need a fast and effective MVP launch? Need a consultancy for your startup? Codemotion to the rescue! We cover: • React (ReactJS, React.js) • React Native (ReactNative) • Flutter • Node.js (Node, NodeJS) • Angular (AngularJS, Angular.js) • Vue.js (Vue, VueJS) • TypeScript (Type Script) • Meteor (MeteorJS, Meteor.js) • Ionic