Hire the Best Koa Developers
in China

By working 5+ years, I've mastered JavaScript and got extensive and deep knowledge of Node. 🌟🌟🌟 SKILLS 🌟🌟🌟 👉 Back-end : NodeJS, ExpressJS, Socket.io, Meteor, Koa, Restify 👉 Front-end : ReactJS, AngularJS 1.x/2, VueJS 👉 Database : MongoDB, Mysql, Postgresql, SQLite, Redis 👉 Operating systems: Linux, Windows, OS X 👉 3rd party APIs : Facebook API/Twitter API/Google APIs/Twilio API/Stripe API/Paypal API/Payment Processor/Bitcoin/Live Chat Process Work Ethic ✓ Honest and hard-working attitude on every projects and services ✓ Agile/Scrum methodology and take best app design patterns/practices ✓ Do the best to meet client's expectations and requirements ✓ Always hunger to learn the most up-to-date technologies and learn fast Being a talented and passionate developer with FULL-TIME AVAILABILITY, I love to work for a LONG-TERM relationship with reasonable clients. If you need a developer like me, PLEASE do not hesitate to get in touch me!!! Thank you.

🔹 Contact Me If You Want 🔹 🧩 Chrome Extensions 📱 Mobile Apps (iOS & Android) 🌐 Websites and Web Apps 🖥 Front-End Solutions in React, Next.js, and Vue 🔗 Full-Stack Development, Database, and API Integrations 🧠 IT, Design, and Management Expertise ------------------------------------------------------------------------------------------------------------------ 📗 Chrome Extension Development 📘 With over 5 years of experience in Chrome extension development, I specialize in creating high-quality, efficient extensions tailored to your needs: 💡 Proven Expertise: Skilled in using Plasmo, WXT, and Vite to create seamless extensions. 🌟 100% Client Satisfaction: Successfully completed 10+ projects on Upwork, earning top reviews. 🛠️ Custom Solutions: From automation to advanced API integrations, I design extensions to streamline workflows and maximize efficiency. 👉 Ready to scale your productivity? Let's make it happen—contact me today! ------------------------------------------------------------------------------------------------------------------ 📱 Mobile App Development 📱 I build cross-platform mobile apps with React Native, delivering native-quality experiences for both iOS and Android from a single codebase: 🚀 Cross-Platform Efficiency: One codebase, two platforms—faster delivery and lower cost. 🔗 Seamless Integrations: REST/GraphQL APIs, push notifications, authentication, and third-party services. 🎨 Polished UX: Smooth animations and responsive layouts that feel native on every device. 📦 End-to-End Delivery: From concept to App Store and Google Play deployment. ------------------------------------------------------------------------------------------------------------------ 💻 Website & Web App Development 📱 As a front-end developer with 10+ years of hands-on experience, I craft scalable, user-friendly web applications that deliver results: ✅ Built 100+ websites using React.js and Vue.js for diverse industries. 🚀 Maintained 10+ Next.js projects, optimizing for performance and scalability. 🎨 Expert in creating responsive designs that offer exceptional user experiences. Let's build your dream web app—whether it's starting fresh or improving what you already have. ------------------------------------------------------------------------------------------------------------------ 🌟 Why Work with Me? 🌟 ✅ Client Success Focus: Your satisfaction is my top priority—I'll work closely with you to ensure your vision becomes reality. ✅ Versatile Expertise: Skilled in front-end frameworks, mobile development, full-stack development, API integrations, and Chrome extensions. ✅ Proven Track Record: My Upwork projects maintain a 100% success rate. ------------------------------------------------------------------------------------------------------------------ 🤝 Ready to Work Together? If you're looking for a dedicated and skilled developer to turn your ideas into reality, let's connect today and discuss your project!

👋 Hi, I'm Yrobot A seasoned full-stack developer with a passion for crafting outstanding web experiences. 🎓 With a degree in Computer Software Engineering and ⏳️ 5 years of professional expertise, I specialize in creating responsive, pixel-perfect web applications and robust backend services. 🔧 Skills: - 🖥️ Front-End: React, Next.js, TypeScript, Redux, Zustand, Tailwind, SCSS - 🎨 UI/UX: Figma, Bootstrap, DaisyUI, shadcn - ⚙️ Back-End: Node.js, GraphQL, Postgres, Prisma, Next.js - 🛠️ Tools: Git, CI/CD, Docker, Nginx, Vite, Webpack, Vercel 😃 Specialties: - 📱 Responsive design - 🎯 Pixel-perfect web apps - 🌍 Internationalization - 🔍 SEO optimization 🤔 Why choose me? - 📈 Proven track record in delivering high-quality, scalable solutions - 🖌️ Expertise in translating Figma designs into pixel-perfect, responsive interfaces - 🧩 Strong problem-solving skills and attention to detail - 🧹 Commitment to clean, maintainable code and best practices - 🤝 Excellent communication and collaboration abilities Whether you need a stunning landing page, a complex web application, or a full-stack solution, I'm here to bring your vision to life. Let's create something extraordinary together! 🎉

I’m a front-end developer with a strong passion for creating visually appealing and intuitive user interface.With over 3years of experience in the industry,I specialize in HTML, CSS, and JavaScript,along with modern frameworks like React,Vue,express,koa and so on.

Korean Native LQA & Linux QA Engineer | App / Game / SaaS Testing I am a Senior Software QA Engineer with over 10 years of experience in the software industry, including 4 years at Symantec. Unlike standard translators, I possess deep technical expertise (Linux, Docker, Python) combined with native Korean linguistic skills. I specialize in Localization QA (LQA), ensuring that your software or game not only reads naturally to Korean users but also functions perfectly without UI/UX glitches. Why work with me: Tech-Savvy LQA: I don't just find typos; I identify hard-coded strings, UI overflows, and functional bugs that pure linguists miss. Proven Reliability: With a background in Enterprise Security (Symantec) and Delivery Management, I understand the importance of deadlines and strict QA processes. Full-Cycle Testing: From creating test plans in Jira to executing regression tests on Linux/Web/Mobile environments. My Services: Korean Localization Testing (LQA) for Games & Apps Functional, Regression, and Compatibility Testing Test Plan & Test Case Creation Bug Reporting & Tracking (Jira/Confluence) Tools & Tech: Jira, Confluence, Linux, Docker, Python, SQL, iOS/Android Testing. I am ready to help you deliver a flawless product to the Korean market. Let's talk!

- Frontend / Fullstack Engineer with 10+ years of experience building scalable web and mobile applications. - Strong background in modern frontend architecture (React, Vue, TypeScript) and hands-on experience with AI-powered products and LLM applications. - Proven ability to lead projects from 0 to 1, deliver production-ready systems, and collaborate effectively in remote teams. - Experienced in using AI-assisted tools to improve efficiency and quality. Skills: - Frontend: React, Next.js, Vue, Nuxt.js, TypeScript, Tailwind CSS - Mobile: React Native (Expo), Flutter - Backend: Node.js, Koa, MongoDB, Strapi, Supabase - Testing: Playwright, Jest - AI & Tools: LLM applications, AI-assisted coding (Cursor, Codex, etc)