Hire the Best Android Developers
in China

Senior Software Architect specializing in secure systems and IoT Sec solutions with 15+ years of experience. I architect and deliver end-to-end nfc solutions, from embedded firmware to cloud-based backend systems. 🎯 CORE EXPERTISE IOT Systems - NFC Solutions: Reader/Writer, HCE, Digital Wallets (Android/iOS) - Smart Cards: JavaCard, MIFARE, DESFire, NTAG,Global Platform,GP,JCOP,Secure Element - Security: PKI, FIDO, Secure Element,HSM, PCI-DSS Compliance - RFID Systems: Asset Tracking, Access Control - EMV Payment: L1/L2/L3 Kernel Development & Certification - Microcontrollers: ESP32, STM32 (WiFi/BLE, RTOS) - Firmware: Secure Bootloader, OTA Updates, Real-time Systems - Industrial Applications: POS Terminals, Vending Machines, Access Control - IoT Architecture: Sensor Integration, Remote Management Full-Stack Development - Backend: Node.js, REST APIs, Database Design (SQL/NoSQL) - Cloud Services: Firebase, AWS/Azure/GCP Deployment - Mobile: Android (NFC APIs), iOS (CoreNFC), React Native - Desktop: Qt, .NET, Cross-platform Applications - Languages: C/C++, JavaScript/TypeScript, Java, C# 💼 SIGNATURE PROJECTS ✅ ESP32 IoT Systems - Created NFC-enabled payment solution with cloud integration - Built secure firmware with OTA update capabilities - Integrated Firebase for real-time data synchronization ✅ Cross-Platform Digital Wallet - Developed mobile wallet supporting EMV contactless payments - Implemented HCE and Secure Element integration - Built Node.js backend with Firebase authentication ✅ Enterprise RFID Solutions - Designed asset tracking systems for industrial clients - Implemented access control with NFC/RFID readers - Deployed cloud-based management platform ✅ EMV Payment Terminal Solutions - Developed EMV L2 & L3 kernel for contact/contactless terminals - Achieved EMVCo certification for payment applications - Implemented secure key management and transaction processing 🔧 TECHNICAL STACK Hardware: ESP32, STM32, NFC Readers, RFID Systems Backend: Node.js, Express, Firebase, REST APIs Database: MongoDB, PostgreSQL, MySQL, Firestore Cloud: Firebase, AWS, Azure, Docker deployment Mobile: Android, iOS, React Native Desktop: Qt, .NET, Windows/Linux Security: PKI, FIDO, PCI-DSS, Secure Boot 📋 CERTIFICATIONS & STANDARDS EMVCo, PCI-DSS, PBOC, Global Platform, ISO 14443 I deliver production-ready solutions with clean code, comprehensive documentation, and ongoing support. Available for both fixed-price projects and long-term contracts.

I've been building mobile apps for over 7 years. I cut my teeth at top Chinese tech companies like Tencent Music and NetEase Games. That's where I learned how to ship high-performance Android apps and smooth cross-platform experiences using React Native and Flutter. I'm also a full-stack developer, so I won't just throw code over the wall. I understand the whole pipeline, including the backend with Node.js. I've shipped apps across Google Play, iOS, and WeChat Mini Programs. You can check out my work here: a custom suit website I built, the Padel Spot app for Android and iOS, and a WeChat Mini Program for Paijitang.

Hi, I'm a fullstack developer skilled in building scalable AI, web and mobile applications. On the front end, I specialize in React, Next.js, and prefer using Tailwind CSS for styling. I'm proficient with build tools like Vite, ESBuild, and SWC. For back-end development, I work with Express.js, GoLang, and Java, and am experienced with both relational (PostgreSQL, SQLite) and non-relational databases (Firebase Store, MongoDB). In mobile development, I am familiar with native Android and iOS, as well as cross-platform frameworks like React Native and Flutter, where I leverage native techniques to solve complex problems. I am also experienced in cross-platform development with C/C++ and adept at utilizing open-source libraries to meet project needs. I am well-versed in CI/CD workflows and tools such as CircleCI, and skilled in containerization and orchestration with Docker, Kubernetes, and serverless architectures. I have a strong foundation in computer science, and I am passionate about solving technical challenges with efficient, innovative solutions.

I specialize in building efficient Python scripts, integrating LLM APIs (OpenAI, Claude, Gemini), and Android app development. Whether you need to extract web data, automate a repetitive workflow, parse JSON, connect your application to an AI model, or fix Android UI bugs, I can provide clean, well-commented code that works right out of the box. I focus on clear communication and lightning-fast delivery. Send me your requirements or error logs, and let's get your task done today!

Results-driven Flutter developer with 2+ years and Java/Kotlin with 5+ years of experience in designing, developing, and deploying scalable, efficient, and visually appealing mobile applications for Android and iOS. Proven expertise in Clean Architecture, state management (Provider, GetX, BLoC), AI ChatBot integrations and so on. Key Skills:: - Flutter (2+ years) - Java+Kotlin (5+ years) - Clean Architecture - State Management: GetX, Provider, BLoC - AI Chat Bot Integrations (e.g., Gemini) - Android Development - MVC/MVP / MVVM - Local Data bases (Realm/Room / SQLite / SharedPreferences) - JetPack components - Strong problem-solving skills and attention to detail Project Experience: Successfully completed 20+ projects using Flutter, Java or Kotlin, with a focus on: - E-commerce and shopping apps - Social media and community platforms - Education apps - Video Player apps Technical Expertise: - Programming languages: Dart, Java, Kotlin - Development frameworks: Flutter, Android SDK - Databases: Firebase, SQLite, MySQL - APIs: RESTful - Version control: Git What I Bring: - High-quality, scalable, and maintainable code - Efficient and timely project delivery - Strong communication and teamwork skills - Continuous learning and adaptation to new technologies

Hi there, I'm Abundance Experience: 5 years of experience in native android application development. 1 year in SwiftUI development Currently working part-time as an Android engineer Education: Hold a Bachelor's degree in Computer Science and Technology, currently a master's degree student at Nanjing University of Science and Technology, China Service Quality: I provide quality work with solid commitment. Skills: Kotlin | JAVA | Javascript | Typescript | SwiftUI - Creating applications for multiple screen resolutions/sizes - Firebase (database, authentication, analytics, notifications, remote config, Crashlytics, Push Notifications) - Integrations with social networks (Facebook, Google) - Dealing with REST API - Proficient with Google Play developer console - Adding Payment Gateway - Ads Integration -Websockets, WebRTC Other Skills: MVVM, MVP, TCP programming, Printer SDK programming Projects: GitHub link: github.com/AbGhost-cyber I’m super dedicated and committed to my work so I can offer you a couple of hours daily even on weekends. Don't hesitate to ask me if you have any Android-related questions. I am looking forward to hearing from you.