DevOps Engineer / SRE with 5+ years building and operating cloud and hybrid infrastructure across FinTech and EdTech. Hands-on with AWS, CI/CD, observability, Linux automation, and AI-enabled systems. Based in Hanoi, Vietnam (UTC+7), open to work.

Ask me about: AWS, CI/CD, Kubernetes, Observability (Prometheus/Grafana), Ansible, LangChain/LangGraph, AI Agents, Automation Testing

Interested in: RAG, Agentic RAG, Fine-tuning LLMs, MCP, Claude Code, A2A protocols

Mid-level DevOps Engineer @ Viet Tin Payment Solutions (FinTech) — Oct 2024 - Apr 2026

• SWAT team monitoring payment gateways and microservices (CMC Cloud, Grafana, Prometheus)
• Operated a Node.js edge connectivity platform across 20 construction sites via Tailscale mesh VPN; standardized rollout with Ansible and PM2
• Designed K3s architecture for orchestration scalability with a roadmap to 500+ sites
• Built full-stack AI apps for biometric recognition and LLM-powered appraisal processing
• Managed and mentored a 5-person automation test team; built testing pipelines integrated into CI/CD

Tech Lead & DevOps Engineer @ EdooSmart (EdTech) — 2022 - Mar 2026

• Led a 3-person dev team (Frontend, Backend, AI/LangChain) in the EdTech domain
• Architected AWS infrastructure (ECS/EKS, RDS, S3, Lambda, Docker, GitHub Actions, CloudWatch) supporting 500+ active learners
• Built AI features with LangChain: automated MCQ generation, AI essay feedback, personalized learning engine
• Developing an AI chatbot for Australian immigration consulting with RAG pipeline

DevOps Engineer & Software Engineer @ Comartek JSC — Aug 2020 - May 2023

• Deployed systems for cryptocurrency, retail, sports, and event clients
• Administered Microsoft 365 and Google Workspace across the organization
• Developed Vigo OS, a Linux-based OS fully localized in Vietnamese

• AWS SAA-C03 & DOP-C02 — Planned May 2026
• Anthropic AI Fluency — Apr 2026
• Anthropic Claude Code in Action — Apr 2026

B.E. Electronics and Telecommunications — Hanoi University of Industry (2014 - 2019)

I'm pretty busy right now.
If you have questions/ideas, get straight to the point.
Don't just say "Hello" — you'll be waiting all day!