Viet L.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

My portfolio: vietleh.vercel.app Senior Mobile Specialist | Flutter & Full-stack Expert | Agentic AI & LLM Integrator Hi there! I don’t just write code; I build intelligent, scalable products that drive real business ROI. With 6+ years of experience and currently serving as a Mobile Team Leader, I’ve led complex projects in Healthcare, Banking, and E-commerce. I specialize in bridging the gap between high-performance mobile interfaces and powerful backend systems, now enhanced with Agentic AI capabilities. Why work with me? AI-Driven Solutions: I don’t just "call an API." I build Agentic AI workflows using LLMs (OpenAI, Claude, Llama) to create apps that can reason, automate tasks, and provide personalized user experiences. Strategic Thinking: I help elaborate and expand your ideas, ensuring the final product isn't just functional but market-ready and future-proof. Full-stack Mastery: Expert in Flutter (my core strength), KMP (Kotlint Multi-platform), React Native, and robust backends (Node.js, Java Spring Boot, Python). Security & Scale: Extensive experience in Banking-grade security, Payment Gateways (Stripe, PayPal, IAP), and Cloud Infrastructure (GCP, AWS). Management Mindset: As a Team Lead, I prioritize clean architecture, strict deadlines, and transparent communication. My Tech Stack: - AI & Agents: ADK, Claude Agent SDK, OpenAI API, Agentic Workflows, Vector Databases. - Mobile: Flutter, Kotlin Multi-Platform, React Native. - Backend: Node.js, Java Spring Boot, Next.js, Python. - Other: N8N, FlutterFlow I’m a graduate of Ho Chi Minh University of Science (HCMUS). My goal is simple: deliver top-tier quality and build a long-term partnership with your business. Ready to build the next generation of AI-powered apps? Let’s chat!