Hire the Best WebRTC Developers
in Vietnam

Architecture design and full-stack development, with over 4 𝒚𝒆𝒂𝒓𝒔 of experience in software development. Has experience building a 𝒍𝒂𝒓𝒈𝒆 𝒔𝒚𝒔𝒕𝒆𝒎 𝒇𝒓𝒐𝒎 𝒔𝒄𝒓𝒂𝒕𝒄𝒉, using 𝒎𝒊𝒄𝒓𝒐𝒔𝒆𝒓𝒗𝒊𝒄𝒆. 𝐂𝐚𝐧 𝐢𝐧𝐯𝐨𝐥𝐯𝐞 𝐦𝐮𝐥𝐭𝐢𝐩𝐥𝐞 𝐩𝐡𝐚𝐬𝐞𝐬 𝐨𝐟 𝐭𝐡𝐞 𝐬𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐩𝐫𝐨𝐜𝐞𝐬𝐬: ⇥ Analyze requirements and give feedback ⇥ Plan and manage tasks/bugs on JIRA ⇥ Create architecture design for the system ⇥ Design API schema (GraphQL, REST, SocketIO …) ⇥ Implement backend code, create test cases for automation test ⇥ Apply CI/CD to automatic test and deployment flow 𝐈 𝐚𝐥𝐫𝐞𝐚𝐝𝐲 𝐰𝐨𝐫𝐤𝐞𝐝 𝐨𝐧: ✓ 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 𝐝𝐞𝐬𝐢𝐠𝐧 ⇥ Create full architecture design for a system, decide technical stacks, protocols, performance … ⇥ Apply API gateway for security, log, validate … Has written plugins for API gateway ⇥ Using message queue to synchronize communication between microservices ⇥ Handle distribution transactions for microservices (Saga pattern, outbox table pattern …) ⇥ Handle security for the system ✓ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: ⇥ Strong experience with NodeJS, MongoDB, and other languages: Golang, and Java. Have the ability to give a good solution to a problem. ⇥ Create backend API with REST and GraphQL ⇥ Apply WebRTC, and WebSocket for real-time application ⇥ Extensive experience with MediaServer technologies such as Kurento and Mediasoup. Implemented real-time audio and video streaming solutions using these platforms. ⇥ Created a template for NodeJS to speed up the development process. ⇥ Always write clean code, easy to maintain and integrate. Create unit test, and integration test. ✓ 𝐎𝐭𝐡𝐞𝐫 𝐬𝐤𝐢𝐥𝐥𝐬: ⇥ FFMPEG process video ⇥ Good at English for both speaking and writing ⇥ Have knowledge about ReactJS and Vue Just invite me, and I will show you what I can do.

I build high-performance mobile and web applications that scale - from early-stage MVPs to enterprise-grade platforms. With 8+ years of hands-on experience across Flutter, iOS (Swift), Android (Kotlin), React Native, and full-stack backends, I've helped startups, scale-ups, and enterprises ship products users love. Whether you need a cross-platform mobile app, an AI-powered SaaS product, a real-time streaming platform, or a scalable backend, I deliver clean, maintainable code with clear communication throughout. ━━━━━━━━━━━━━━━━━━━━━━━━ ✅ WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━━ → Mobile Apps (Flutter, iOS, Android, React Native) → AI-Powered Apps (GPT-4/5, Claude AI, OpenAI API, Chatbots) → SaaS & Subscription Platforms (Multi-tenant, billing, admin) → Real-Time Video & Live Streaming Apps (WebRTC, Agora, Twilio) → On-Demand Apps (Taxi, Food Delivery, Booking, Marketplace) → E-Commerce & Marketplace Platforms → E-Learning & EdTech Applications → IoT & BLE-Based Mobile Apps → No-Code / Low-Code (Bubble, FlutterFlow, Webflow) ━━━━━━━━━━━━━━━━━━━━━━━━ 🛠 TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━ Mobile: Flutter · Swift · Kotlin · React Native Backend: Node.js · NestJS · Laravel · Express · Firebase Frontend: React.js · Next.js · Angular Databases: MySQL · MongoDB · PostgreSQL · DynamoDB · Firestore Cloud: AWS (Lambda, API Gateway) · Firebase · GCP Payments: Stripe · PayPal · Razorpay · Braintree Real-Time: Socket. IO · WebRTC · Twilio · Firebase RTDB Maps: Google Maps · Apple MapKit · GPS Tracking ━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Full ownership & IP rights from day one (your GitHub, your code) ✔ App Store & Google Play deployment handled end-to-end ✔ 6 months free post-launch maintenance ✔ Agile/Scrum process with regular updates & demos ✔ Strict adherence to Apple & Google guidelines ✔ Free 15-30 min meeting before any engagement Let's talk about your project. Message me today.

I build Laravel + React MVPs and stabilize fragile, legacy, or AI-assisted products without unnecessary rewrites. I turn fast-built prototypes into production-ready systems that can support web and mobile apps, real users, and growing teams. Have only a raw product idea? I can help clarify the requirements, compare implementation options, create a practical roadmap, build and launch the product, and support it after release. What I can help with: • Build an MVP from idea to production • Audit an existing Laravel/React codebase and create a practical recovery plan • Stabilize legacy or AI-assisted projects through incremental refactoring • Design a shared backend and API for web, mobile, and external integrations • Automate complex business workflows, billing, roles, and permissions • Build real-time chats, WebRTC video meetings, notifications, queues, and file-processing systems • Integrate AI and third-party services • Optimize performance and infrastructure costs Selected results: • Express-Diz: stabilized a rapidly built platform, developed billing and real-time chat systems, launched scheduled WebRTC/LiveKit video meetings with automated reminders, and implemented direct multipart uploads of 2–3 GB files to S3 • Designed a state machine for deal workflows and a YandexGPT integration that detected tense conversations and alerted coordinators • Keyway: joined an existing real estate platform as the sole developer, brought it to production, and prepared it for a growing team • Built Mapbox/PostGIS search for listings across eight countries and a pipeline processing up to 1,000 listings per minute • Reduced AI image-processing costs by more than 100x through batching and image collages • OGFIT: co-founded and launched a fitness product in the App Store and Google Play Core stack: PHP 8, Laravel, React, TypeScript, PostgreSQL/PostGIS, MySQL, Redis, RabbitMQ, Elasticsearch, WebSocket, WebRTC/LiveKit, S3, Docker, and Nginx. I also have experience coordinating 3–5 developers, reviewing code, decomposing requirements, and communicating directly with business stakeholders. If you need to launch an MVP, rescue an unstable product, or prepare your Laravel/React system for web and mobile growth, send me a message.

I am a web developer with experience in developing software for small and medium-sized businesses, along with VoIP and WebRTC systems. If you need to develop a website using technologies like Spring, .NET, Node.js, or implement VoIP systems for voice communication or customer survey campaigns, I can help.

🚀 I Build Scalable Software Systems That Don’t Break When You Grow Most developers write code. I design systems that survive scale. With 5+ years of experience as a Full-Stack & AI/ML Engineer, I architect and deliver high-performance systems used by global users, from AI-driven platforms to enterprise-grade distributed systems. 💡 What I Help You Achieve 🏗 Enterprise-Grade Architecture Scaling is not about adding servers later. It is about designing the right foundation from day one. I design: • Microservices and event-driven architectures • High-availability distributed systems • Horizontal auto-scaling infrastructure • Zero-downtime deployments • Load balancing and intelligent caching • Rate limiting and anti-DDoS strategies • Multi-tenant SaaS architecture Tech stack: • FastAPI, Django, Flask, Express.js, NestJS • Go, Java Spring, ASP.NET, Ruby • Docker, Kubernetes, AWS, Nginx, Linux • CI/CD pipelines, monitoring, logging systems • From MVP to enterprise-level traffic without rewriting the system later. 🧠 AI-Integrated Software Systems AI functions as an infrastructure layer inside modern applications. Experience includes: • NLP, OCR, facial and speech recognition • Intelligent search systems with vector databases • RAG pipelines and knowledge systems • Multi-model orchestration systems • GPU-optimized inference pipelines Frameworks and tools: • PyTorch, TensorFlow, Keras, scikit-learn • Whisper, Tesseract, PaddleOCR • DeepFace, InsightFace • Elasticsearch, Pinecone • CUDA, cuDNN Focus areas: performance, cost efficiency, production readiness, scalability. ⚡ Backend Engineering • RESTful APIs and GraphQL • Event-driven systems • Queue-based processing • Background job orchestration • Secure authentication and authorization Databases: • PostgreSQL, MySQL, MongoDB • Query optimization, indexing, full-text and vector search Databases and Optimization • PostgreSQL, MySQL, and MongoDB • Query optimization, indexing strategies, and search systems 🎯 Frontend Engineering • React, Next.js, Vue, Nuxt, Angular • SEO optimization • Performance tuning • Lazy loading and caching strategies • Responsive and scalable UI architecture 🌐 Real-Time Systems • WebRTC, MQTT, Socket • Streaming systems • Telecom systems Designed for low latency, high concurrency, and production reliability. 📱 Cross-Platform Development • Flutter • React Native • Native Android • Firebase ecosystem 🌟 Professional Approach • Systems thinking mindset • Scalability-focused architecture • Long-term maintainability • Clear communication • Reliable delivery 🌟 Why Clients Hire Me Not because I list technologies. But because I understand: • Business logic • Scalability constraints • Infrastructure costs • Security risks • Long-term maintainability I think like a technical founder or CTO. I don’t just build features. I design systems that support growth. 📈 Let’s Build It the Right Way If you need: • A SaaS platform built from scratch • A scalable enterprise backend • AI integrated into your product • A system redesign for performance • An architecture that can scale without limits Let’s build it properly from day one. Because great software isn’t just written. It’s engineered.

🧠 Senior Fullstack Team Lead | Mobile, IoT & AI App Developer | 6+ YOE | Flutter | Kotlin | Python | C++ I'm a Fullstack Team Lead and Mobile Developer with over 6 years of professional experience, building and launching cross-platform apps in mobile, desktop, and IoT ecosystems. I specialize in Flutter, Kotlin/Jetpack Compose, Ktor backend, and real-time technologies like Bluetooth, HID, WebRTC, and SocketIO. I’ve led full product lifecycles—from architecture to deployment—on apps that integrate hardware control, real-time communication, and AI-enhanced features, while delivering seamless user experiences across Android, iOS, and embedded systems. 🔧 Skills & Tech Stack Frontend & App Development: Flutter, Android (Jetpack Compose + XML), Kotlin, Java, SwiftUI Backend Development: Ktor (Kotlin), NodeJS, Python, Spring Boot, RESTful APIs Real-time & Embedded: Bluetooth LE, Serial Port, HID, WebRTC, FFmpeg, C++, Oboe Database & Cloud: Firebase (RTDB, Firestore, Auth), PostgreSQL, MySQL, SQLite, ObjectBox AI Integration: Tensorflow Lite, PyTorch, GPT API (Chatbot, Voice Transcription) CI/CD & Publishing: In-App Purchases, Mobile Ads (AdMob, AppLovin), Play Store, App Store 🚀 Highlight Projects 🎵 Smart Karaoke System (2024 - Present) Fullstack architecture for IoT-based karaoke system (5-member team) Tech: Flutter, Ktor, C++, FFmpeg, Serial Port, SocketIO, JavaFX, PostgreSQL Role: Architected system, managed backend & embedded communication, led team & QA 🖨 AirPrint – Mobile Wireless Printer App Print, scan, photo edit, Google Drive, and document conversions Tech: Flutter, Jetpack Compose, Firebase, Bluetooth, REST API Role: Solo Dev | Published on Play Store 🎮 XB Remote Play – PS4/PS5 Game Controller Stream console screen to mobile, cast multimedia, built-in game store and chatbot Tech: Flutter, WebRTC, C++, Firebase, SocketIO 🧠 Active9 – AI Health & Fitness Tracker Cross-platform health monitor app with AI voice & camera integration Tech: Flutter, NodeJS backend, Firebase, Google Ads Role: Fullstack Dev | Android / iOS 💡 IoT Controller Suite Devices: Smart LED Light, Canon/Brother Printer, Roku TV, LG ThinQ Tech: Flutter + Embedded C++ + BLE/HID + Python backend Role: Developed utility tools & device control protocols 🧭 Team Lead Experience Managed teams of 3–5 developers (Agile workflow, daily standups, code reviews) Mentored junior developers in mobile architecture and performance optimization Defined coding standards, release strategy, and quality assurance process Liaised between stakeholders, product owners, and QA during tight timelines 💬 Why Work With Me? I build feature-rich apps that bridge hardware and software I focus on clean architecture, maintainable code, and scalable design I value communication, timely delivery, and aligning with your business vision I constantly learn and integrate new tech to give your product an edge 🔗 Let's Build the Next Big Thing I bring a rare combination of deep technical skill, real-time system experience, and hands-on leadership. Whether you're launching a new product, rebuilding a legacy system, or integrating IoT devices, I can help turn your ideas into scalable, production-ready solutions. Let’s connect and bring your vision to life. Warm regards, Nguyễn Thiện Quang