About

A product manager who builds

I'm Marc Nguyen, a senior product manager with about 10 years in EdTech and Fintech. I build production AI products myself, end to end: a multi-workspace knowledge base over 42,000+ documents, evaluation frameworks, audit agents, inbox triage and developer tools. vuihoc.ai is where that work is offered to other teams.

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Portrait of Marc Nguyen

What I do

Product management

  • Roadmap and strategy
  • Stakeholder alignment
  • Customer onboarding
  • Spec and PRD writing
  • Cross-team facilitation

AI engineering

  • LLMs and the Claude API
  • MCP servers
  • Vector RAG (Postgres + pgvector)
  • Multilingual embedding and reranking
  • LLM evaluation and LLM-as-judge
  • Astro, Python, TypeScript

Infrastructure

  • Cloudflare Workers, Pages, Tunnel
  • Google Cloud, Oracle Cloud
  • systemd and launchd
  • Telegram bots

Product design

  • Wireframes and flows
  • Design systems
  • UX audits against Apple HIG and WCAG

How I work

Evidence over opinion

A small test on real data beats a long debate. Every recommendation comes with the measurement behind it.

Ship, then polish

A working first version in days, improved in small steps, beats a perfect plan that never ships.

Cross-functional

Years with engineers, designers, finance and customers: nobody owns the whole truth alone.

Lean by default

Most of these products run on free or near-free cloud tiers. Constraints force simpler architecture.

A short timeline

  1. 2026

    Currently

    Senior PM at LittleLives (EdTech, SG/SEA), and building production AI products end to end under vuihoc.ai.

  2. 2024

    AI deep-dive

    Started vuihoc.ai as research notes on LLMs, prompt engineering and RAG patterns.

  3. ~2016

    Product career

    Started in product management at EdTech and Fintech companies in Vietnam and Southeast Asia.

Organisations and platforms I have worked with

Through my product roles and my own builds. Listing a name here does not mean it is a vuihoc.ai client.

  • LittleLives
  • PCF
  • NLPS
  • Babilou
  • Anthropic Claude
  • Oracle Cloud
  • Google Cloud
  • Cloudflare

Certifications: Certified Scrum Product Owner (CSPO, Scrum Alliance), Professional Scrum Master I (PSM I, Scrum.org).