Senior Full-stack AI Engineer (Vietnam based only)

Category: Technology Location: Location: Vietnam (Remote) Employment Type: Full-time About the Opportunity On behalf of our client, we are hiring a Full-Stack AI Engineer to join an innovative product team building next-generation AI-powered customer experiences. Our client is a fast-growing technology company focused on conversational AI, intelligent automation, and customer engagement solutions. This role offers the opportunity to work on cutting-edge AI applications that combine large language models (LLMs), real-time voice interactions, and modern web technologies to create impactful user experiences at scale. As a Full-Stack AI Engineer, you will be responsible for designing and delivering AI-powered products end-to-end — from agent orchestration and backend services to real-time user interfaces and embedded web experiences. ​ Key Responsibilities Design single/multi-agent systems ( OpenAI & Anthropic) with robust routing, tool calling, state, and recovery logic, primarily using Vercel AI SDK. Build low-latency real-time voice pipelines (streaming STT/TTS, emotion-aware responses, sub-second turn-taking, and clean barge-in handling). Operate the WebRTC-based real-time transport layer (audio rooms, agent workers, and session lifecycles). Build Model Context Protocol (MCP) servers/clients to securely connect databases; implement agentic browser automation to execute real-world tasks. Deliver end-to-end features using Node.js (TypeScript) and React/Svelte , streaming ag