Available for opportunities

Doan
Anh Thi

Fullstack Engineer · AI/LLM Specialist
Da Nang, Vietnam

View Experience → Get in touch
// developer profile
const engineer = {
name: "Doan Anh Thi",
role: "Fullstack Engineer",
experience: 3 // years,
specialties: [
"LLM / AI Systems",
"Microservices",
"DevOps / K8s",
],
users_scaled: 150_000,
location: "Da Nang 🇻🇳"
}
150K+
Users Scaled
8M+
Requests / Month
3+
Years Experience
// Area of Expertise

What I Do Best

A blend of software engineering, AI engineering and technical leadership.

🏛️
System Architecture & Scalability
Design microservices-based systems with high availability, fault tolerance and scalability for high-traffic applications.
🤖
AI / LLM Engineering
Build LLM-based chatbot systems with memory, agent/multi-agent architectures and RAG pipelines using LangChain & LangGraph.
🚀
Engineering Leadership
Lead and mentor engineering teams, establish best practices, and improve team productivity & code quality.
// Work Experience

Work Experience

From AI engineering to fullstack development and system architecture.

Aug 2024 — Present
Fullstack Engineer
High5 Co., Ltd
  • Scaled system to support 150,000+ users / 8M+ requests per month with high availability and fault tolerance
  • Reduced infrastructure costs through self-hosted Kubernetes and optimized resource utilization
  • Cut CI/CD costs by implementing self-hosted GitHub Actions runners
  • Reduced deployment time via optimized CI/CD pipelines and automation
  • Improved query performance and reduced latency through database optimization
  • Increased QA efficiency by replacing traditional automation testing with AI-driven testing systems
  • Enhanced code maintainability by refactoring legacy systems using Clean Architecture
  • Strengthened system security by implementing centralized secrets management across services
Kubernetes CI/CD Docker GitHub Actions Grafana Clean Architecture Database Optimization
Dec 2023 — Jul 2024
AI Engineer
Brothers Co., Ltd
  • Built LLM-based chatbot systems with memory, conversational, and agent/multi-agent architectures
  • Leveraged RAG pipelines using LangChain and LangGraph
  • Developed LLM agents with tool-calling capabilities, integrating external APIs and internal services
  • Optimized prompts, retrieval strategies and agent workflows to improve accuracy and reasoning quality
  • Reduced AI inference costs by deploying and optimizing self-hosted AI models on VPS
LangChain LangGraph RAG Multi-Agent Prompt Engineering LLM Python
Apr 2022 — Nov 2023
Lead Developer (Freelance)
Heritage Digitalization Project
  • Led end-to-end development of a heritage digitalization platform showcasing digitized cultural sites, monuments, and architectural works across Vietnam
  • Architected a bilingual (Vietnamese/English) web application with interactive map exploration, 3D photogrammetry viewers, and 360° virtual tours
  • Integrated Sketchfab and Matterport embeds to deliver immersive 3D model and virtual tour experiences directly in the browser
  • Built dual-mode discovery interface (grid + interactive map) using Leaflet for geospatial visualization of heritage locations
  • Designed and implemented a scalable content schema supporting historical timelines, technical specifications, media galleries, and downloadable research documents
  • Led a small development team, defining technical direction, code standards, and delivery milestones for the client
  • Optimized media delivery and 3D asset loading to ensure smooth performance on both desktop and mobile devices
  • Delivered a production-ready platform aligned with the client's heritage preservation and public outreach goals
React TypeScript Tailwind CSS Leaflet Sketchfab Matterport 3D Visualization Team Leadership
// Tech Stack

Technologies

A versatile toolkit spanning frontend, backend, DevOps and AI/ML engineering.

Language
Python TypeScript JavaScript Golang
Frontend
NextJS ReactJS VueJS
Backend
REST API Microservices Clean Architecture LangChain LangGraph
Database
MongoDB PostgreSQL MySQL
DevOps
Kubernetes Docker CI/CD GitHub Actions Grafana Prometheus Loki
AI / LLM
RAG Pipelines LangChain LangGraph Multi-Agent Prompt Engineering Claude MCP
// Impact

Key Achievements

Concrete, measurable outcomes delivered throughout my career.

📈
150,000+ users & 8M+ requests/month with high availability
☸️
Reduced infrastructure costs through self-hosted Kubernetes
⚡
Cut CI/CD costs by implementing self-hosted GitHub Actions runners
🤖
AI-driven testing replaced traditional automation testing
🔒
Centralized secrets management strengthened system security
🏗️
Clean Architecture refactoring improved scalability & maintainability
🧠
Self-hosted AI models on VPS reduced inference costs
👥
Mentoring & best practices boosted team productivity
// Education & Courses

Education

A strong engineering foundation combined with specialized AI expertise.

Sep 2017 — Sep 2022
Bachelor of Engineering
Ho Chi Minh University of Technology
(Bach Khoa University)
Jan 2022 — Dec 2023
Data Science & Artificial Intelligence Program
AI Vietnam
// Let's connect

Ready to collaborate?

Reach out to discuss new opportunities or exciting projects.

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