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Fractional Head of Growth (AI) · Ho Chi Minh City

Youngjin Koh

Youngjin Koh

Korean-born. Australian. Ho Chi Minh City. Restaurant GM, NAB business banker, then Head of Customer Success at two SaaS companies, $3.8M and $4M ARR. Since then, my own brands in Australia and Vietnam.

80+ ideas taken to first sale. Most killed early. That's the job: find what sells, cut the rest, fast.

What I've built

  • Tinhhoa Fragrance

    Closed

    1,500 units. 55% margin. 5.5x ROAS.

  • English365

    Five years

    Coaching Vietnamese professionals. $19K peak month.

  • Scale Master

    Active, Australia

    Paid ads agency. Ads-only work lives there.

  • Listingline

    Deprioritised

    AI voice agents for real estate.

  • VocaMonkey

    In development

    AI language learning.

80+ ideas. Most killed.

Research to first sale, 80+ times. Most died early, on purpose. Cutting fast is the skill.

Tết planning starts in November. Three weeks to know.

Two brands at a time. One per category. Reply within two working days.

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