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✅ 13 Years Professional Experience ✅ 40+ Mobile Apps ✅ Top Rated Plus Developer Hey there! 👋 I'm Sherwin, an expert Engineer with 13+ years of experience at big tech companies. I'm experienced leading, designing and implementing core mobile features in fast-paced, technology-driven environments with worldwide impact and multiple stakeholders. I am fluent in English and have experience working with scalable and testable code, REST APIs, multiple design patterns, CI/CD pipelines and version control. 🏆 Worked in the multinational company MicroStrategy, Developed apps with over 100 million daily users such as DiDi and Kuaishou before. 🚀 Expertise in Technologies: o Native Development: Swift, SwiftUI, Objective-C, Kotlin, Java, Jetpack Compose, HarmonyOS o Cross-Platform Frameworks: React Native , Flutter o DataBase: Realm, CoreData, Firebase FireStore, Firebase Realtime Database, Supabase, RoomDatabase o Web: Flutter Web o Deploy: AWS S3, Lamda, CloudFront, EC2, OpenShot o Server Development: Python, TS ✅ My experience domains: o AI Agent o Bluetooth / Smart Watch / Camera Domain o Fitness / Health Domain o OpenAI / Assistance / Whisper o Location Tracking / Travel o Social Media/Dating Domain/Video/Audio chats o Video/Audio player processing application o Financial / Shopping Domain o Payment / In App Purchase / Apple Pay / Stripe I'm excited to bring my experience and skills to new projects and deliver high-quality work on time and within budget. Let's make great apps together! Regards, Shaolin

I am a dedicated Christian IT developer with 8+ years of experience specializing in Swift, Objective-C, and Vue. Throughout my career, I have successfully delivered a range of high-impact projects, from AI-driven virtual human applications to smart home automation systems, news platforms, and robust websites. I thrive on solving complex problems and creating seamless user experiences, always leveraging the latest technologies to drive innovation. Key Skills: Programming Languages: Swift, Objective-C, Vue, JavaScript Frameworks & Tools: Alamofire, RxSwift, FFmpeg, AVAudioEngine, Masonry, SCSS, WebSocket, Moya App Development: AI virtual human chat apps, audio processing, smart home automation, news apps Web Development: Vue.js projects with complex component architecture, slot management, and drag-and-drop interfaces Cloud Integration: Real-time data handling using WebSocket, PCM audio streaming, cloud-based speech generation Key Achievements: AI Virtual Human Chat App: Led the development of an app where users interact with AI avatars through real-time text, voice, and video calls, enhancing user engagement with life-like digital experiences. Smart Home App: Integrated smart home device control and automation into a user-friendly mobile app, streamlining home management and IoT functionalities. News App Development: Developed a responsive news app with dynamic content delivery, allowing real-time updates and personalized user experiences. Website Development: Designed and optimized websites using Vue.js, ensuring smooth navigation, efficient code structure, and enhanced user interaction. Continuous learning in modern development practices and cutting-edge technologies. This combination of strong technical expertise, creative problem-solving skills, and a passion for impactful digital solutions defines my approach to IT development.

I build automation systems and ship real products. Over the past year I have: • Built and delivered a 5-workflow n8n automation system (236 nodes, 1,600+ lines of custom JavaScript, 29 LLM/agent nodes) for a US-based Amazon brand management agency — including an ASIN-matching pipeline accepted at 99.99% accuracy on 1,000+ ASIN pairs, and a 9-module content-generation engine delivered on deadline. • Shipped MemePouch, an iOS sticker app, to the App Store — live now with paying customers in multiple countries. I handle the full cycle myself: SwiftUI development, StoreKit payments, analytics, App Store review, and marketing. • Built Tether, an end-to-end-encrypted health-sharing iOS app (HealthKit, sleep tracking, Supabase backend), currently in beta. • Delivered a crypto trading-strategy automation platform (Baserow + Dify + Supabase) for a Hong Kong client — three milestones, completed ahead of schedule. What I can do for you: 1. AUTOMATION — n8n workflows, AI/LLM pipelines, API integrations, web scraping. If it's repetitive and it touches an API, I can automate it. 2. WEBSITES — design, build, and put it live: landing pages, dashboards, full-stack apps (Next.js, Supabase, Cloudflare/Vercel). You get a working URL, not a zip file. 3. iOS APPS — SwiftUI apps from prototype to App Store release, including payments and analytics. How I work: I break projects into modules, estimate hours per module, and quote a fixed price with clear milestones — you know exactly what you're paying for before we start. On-time delivery is the norm, not the exception. From my latest client review: "The quality of work delivered was exceptional, exceeding expectations at every stage." Timezone: UTC+8 — same-day overlap with Australia and Asia, async-friendly for US/EU clients.

I am a seasoned IT System Engineer with a broad coding background and a proven track record in setup systems and softwares, designing and managing robust infrastructure. My core expertise lies in: ✅Systems & Virtualization: Deep proficiency in Linux, server hardware, and virtualization technologies. ✅DevOps & Cloud Practices: Skilled in implementing DevOps principles, with experience in networking, DNS, and storage (RAID) solutions. ✅Embedded & IoT: Hands-on experience in embedded systems and IoT projects, from prototyping and soldering circuit boards to coding. My tech stack： • C, CPP, MIPS Assembly, QEMU and TCG Dev, Linux distro porting • RHEL/CentOS/RockyLinux, Debian/Ubuntu, LoongArch Linux • Apache, Nginx, MySQL/MariaDB, PHP, PHP-FPM, CA and SSL • Python, Java, Objective C and iOS • VMware vSphere, pfSense/OPNSense, OpenWRT, Prometheus, Cockpit • Gitlab, Apache Subversion, Redmine, Jenkins, Docker • NextCloud, ownCloud A Comprehensive Technical Ecosystem: My experience is unified by a deep commitment to Free and Open-Source software. This spans the entire stack: from porting systems for IC design to operating GNU/Linux clusters; from server-side coding to mobile development; and from troubleshooting complex networks and RAID to implementing open-source alternatives to proprietary suites like Google Worksapce and Microsoft 365. End-to-End Solution Delivery: I leverage this broad skill set to deliver complete solutions—whether it's applying foundational knowledge (like that of Internet root servers) to configure complex DNS for a new business site, or developing strategies to enhance efficiency by migrating to public clouds or building cost-effective private clouds. Beyond technical know-how, I am driven by a passion for understanding the "why" behind systems. I am a meticulous professional who prioritizes client success through proactive communication and a detail-oriented approach. With an A-to-Z understanding of computers and networks, complemented by management experience, I am poised to deliver reliable and efficient service.

::: Self Introduction ::: Highly motivated and enthusiastic System Architecture & Full Stack developer focus on software development with more than 15 years. I am proficient in requirement analysis, System design, Software development, Continous integration and Task management. ::: Programming experiences ::: 🛢️ BACKEND DEVELOPMENT: Java, Spring, Spring Boot, MyBatis, MySQL, RabbitMQ, Golang, Gin. 🖥️ FRONTEND DEVELOPMENT: React, HTML5, CSS, Tailwindcss, Next.js, WebAssembly 📱 MOBILE DEVELOPMENT: Flutter, React Native, Google & iOS app deployment workflow and policy. ⚒️ DEVOPS: Jenkins, Git, Shell, Python, Kubernetes, Ansible. 🧑‍💻 SOFT SKILL: Requirement analysis, System design, Complicated problem breakdown, Task management. ::: Achievements ::: 🏆 Successfully deployed 5 apps to Google Play Store, and 15 apps to apple store. 🏆 Successfully Design, Develop and Deployed an IoT Based popcorn auto seller machine management platform to our customer, which has been get more than 70000 clients. The system is build with Golang + Gin + Gorm + Postgresql. 🏆 Successfully Design, Develop and Deployed an IoT based boiler management system to 3 customers, and manage more than 50000 boilers and get more than 20GB history data in Time series database for futther data analysis. The system is build with Spring Cloud and micro-service pattern. 🏆 Build up Company IT development workflow and Devops infrastuture from 0 to hero. Build a whole process for system deploy automation with Gitlab, Jenkins, Harbor, Kubernetes, Aliyun. Hope to have the opportunity to work together to create a better future. Cheers.

Why Choose Me? 🌟 Expertise Across Full-Stack Development I am a professional full-stack engineer with a diverse skill set spanning both front-end and back-end technologies. With years of experience building scalable, high-performance applications, I deliver reliable solutions that meet client needs. I work with modern tech stacks such as React.js, Vue.js, Node.js, Laravel, Spring Boot, Swift, Kotlin, and Flutter to build top-tier products. 🌟 Proven Track Record in Delivering High-Quality Solutions I have successfully delivered applications for a range of industries, including e-commerce, fintech, healthcare, and IoT. From mobile apps with millions of users to cloud-based enterprise solutions, my focus is always on performance, user experience, and scalability. 🌟 Comprehensive and Transparent Development Process Requirement Analysis: I ensure a thorough understanding of your business goals to deliver a product that aligns with your needs. Agile Development: I use agile methodologies to ensure flexibility, quick iterations, and timely delivery of high-quality products. Rigorous Testing: My development process includes comprehensive testing to ensure robustness, security, and scalability. Timely Delivery: I adhere to deadlines, delivering functional products without compromising quality. 🌟 Global Perspective with Local Expertise As an engineer based in China, I have a unique understanding of both local and global markets. I offer competitive pricing for clients in the early stages of development, ensuring you get the best value while building long-term partnerships. 🌟 My Philosophy: Excellence Through Service I believe that true excellence comes from both professional expertise and a user-first approach. My goal is to craft solutions that not only meet technical requirements but also provide exceptional user experiences. Skills & Expertise Frontend Development: React.js 💻 Vue.js 🌐 Angular 🔧 HTML5 🖥️ CSS3 🎨 JavaScript (ES6+) ⚡ TypeScript 📝 Backend Development: Spring Boot 🚀 Node.js 🔥 Express.js ⚙️ Laravel 🖥️ Python (Django, Flask) 🐍 Ruby on Rails 💎 Mobile Development: iOS (Swift, Objective-C, SwiftUI) 📱 Android (Kotlin, Java) 🤖 Cross-Platform (Flutter, React Native) 🔄 Databases & Cloud Services: MySQL 🗄️ PostgreSQL 🔐 MongoDB 🧱 Firebase 🔥 AWS ☁️ Google Cloud 🌍 Azure 🌐 AI/ML & Computer Vision: TensorFlow 🤖 PyTorch ⚙️ Keras 🧠 scikit-learn 📊 OpenCV 👁️ NLP (GPT, BERT) 🧳 Computer Vision (Image Recognition, Object Detection, OCR) 🖼️ DevOps & Testing: Docker 🐳 Kubernetes 🚢 Jenkins 🛠️ CI/CD 🔄 Selenium 🔍 Appium 📱 Unit and Integration Testing 🧪 UI/UX Design: Figma 🎨 Sketch ✏️ Adobe XD 🖌️ Key Areas of Expertise E-commerce Solutions 🛒: Building scalable platforms and order management systems. Fintech Applications 💳: Developing secure, reliable payment and trading systems. Healthcare Apps 🩺: Mobile apps for telemedicine, medication tracking, and health monitoring. AI/ML Solutions 🤖: Intelligent chatbots, recommendation systems, speech-to-text. IoT & Device Integration 🌐: Smart home solutions, real-time monitoring, device automation. Streaming & Interactive Platforms 🎥: OTT services, live streaming, and interactive media. Why Work With Me? Cost-Effective Solutions 💰: High-quality, reliable results at competitive rates. Client-Centric Approach 🤝: Transparent communication and a focus on delivering exactly what you need. Post-Delivery Support 🛠️: Ongoing support for product optimization and growth after delivery. Let's Build Something Amazing Together! I am committed to providing solutions that deliver real value. Whether you’re working on an app, a website, or an AI project, I’ll bring my technical expertise and passion for quality to help bring your ideas to life.