Jay Ahn

Jay Ahn

Ex-CTO & fullstack architect · CargoSum
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About

Fullstack software architect and former startup CTO based in Korea. I've spent 7+ years taking products from 0 to 1 at early-stage startups — logistics, proptech, healthcare and clinical research — owning architecture, stack choices and delivery end to end. Now I'm building CargoSum, a free freight calculator suite for logistics people: 3D container loading, CBM & chargeable weight, pallet and trailer capacity, surcharges and Incoterms — all in the browser, no signup. Into: Kotlin/Spring, Next.js, LLM apps, DDD, and shipping small tools that solve real work problems.

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Maker History

  • CargoSum
    CargoSumFree freight calculators with a 3D container load planner
    Oct 2026
    • 🎉
    Joined Product HuntOctober 10th, 2026

Forums

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17h ago

CargoSum - Free freight calculators with a 3D container load planner

CargoSum is a set of free freight calculators that run in your browser: no sign-up, no quote form, nothing sent to a server. The core is a 3D container load planner: enter mixed cartons and crates, and it packs them into a 20ft, 40ft, 40HC, 45HC or custom container, shows weight balance and center of gravity, and gives you a shareable link. Also: CBM, chargeable weight, pallet loading, NMFC freight class, LTL linear feet, fuel surcharge and demurrage. In English, German, Japanese and Korean.
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