AI Engineer · LLM / RAG / Agent Systems

Nguyen Son Tung

nstung463@gmail.com · 0335 955 790 · Ho Chi Minh City, Vietnam

// Profile

AI Engineer at FPT Software with 3+ years building production LLM, RAG, and multi-agent systems for enterprise clients. Specializes in agent harness engineering: tools, sandbox, permissions, memory, skills, and connector layers that make agent sessions dependable.

// Experience

AI Engineer · ITOCHU GPT

Jul 2025 — Present

Multi-Agent AI Platform · Client: ITOCHU Corporation · Team of ~20

  • • Own the File Agent subsystem — PPTX/DOCX/XLSX generation inside isolated sandboxes.
  • • Delivered video-analytics Q&A and streaming text-to-speech capabilities integrated into the platform.
  • • Collaborated across backend, frontend, AI, and infrastructure teams to bring agent capabilities from architecture through production deployment.

AI Engineer · Infinity

May 2026 — Present

Agent Harness & Sandbox Platform · Independent codebase · Technical Lead

  • • Built the agent harness end-to-end: runtime, tool execution, permissions, and sandbox orchestration.
  • • Integrated OpenSandbox to isolate LLM-generated code and file-processing workloads.
  • • Designed a human-in-the-loop tool-approval system with pause, persist, and resume.

AI Engineer · AI Buddy

Feb 2025 — Apr 2025

Client: KPMG · Team of 5

  • • Built an automated crawling pipeline extracting financial data from structured & unstructured sources.
  • • Developed the knowledge base backing real-time RAG querying for the chatbot.

AI Engineer · Ivy Chatbot

Dec 2024 — Mar 2025

FPT Software IvyChat product line

  • • Optimized document chunking to improve retrieval accuracy across multiple source types.
  • • Implemented LangGraph to structure multi-turn conversation flow and maintain context.

// Core skills

Agent & LLM

RAG · LangChain · LangGraph · MCP · OpenAI API · Azure OpenAI · Anthropic Claude · Hugging Face · Prompt Engineering

Agent Harness

OpenSandbox · HITL Permissions · Agent Memory · Skills Systems

Backend & Data

FastAPI · SQLAlchemy · Celery · Pandas · PostgreSQL · MySQL · SQLite · Redis · Azure Cognitive Search · Blob Storage

Computer Vision

YOLO · PyTorch · CNN · Transformers · CM-GAN · DeepFillv2 · ArcFace · Triplet Loss

Cloud & DevOps

Azure · Docker · Kubernetes · Azure DevOps · Git/GitHub · Pytest · Langfuse

AI Coding Tools

Claude Code · Codex · Cursor

// Education

Master of Software Engineering (MSE), Artificial Intelligence

FPT University

2026 — Present

B.Sc. in Artificial Intelligence

FPT University

2021 — 2025