Jaewon Han

Overview

I started Ledger Ops to fix HR software for teams who were tired of the workarounds. Previously built and sold a small HR software company.

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Experience

1. Founder & CEO

   Aug 2023 - Present
   Ledger Ops · 3 yr 2 mo · Contract · Seoul, South Korea
   • Raised $14 million across 2 rounds.
   • Signed 171 paying customers, 17 of them enterprises.
   • Took Ledger Ops from zero to $11 million ARR.
2. Staff Software Engineer

   Nov 2020 - Aug 2023
   CIMB · 2 yr 9 mo · Full-time · Seoul, South Korea
   • Cut p99 latency on the storage services from 754ms to 42ms.
   • Grew the storage team from 5 to 39 engineers.
3. Senior Engineering Manager

   May 2018 - Nov 2020
   DBS Bank · 2 yr 6 mo · Full-time · Seoul, South Korea
   • Cut p99 latency on the storage services from 888ms to 66ms.
   • Wrote the payroll service that now handles 65 million requests a day.
4. Platform Engineer

   Mar 2017 - May 2018
   Carousell · 1 yr 2 mo · Full-time · Seoul, South Korea
   • Shipped a rewrite that took build times from 41 minutes to under 4.
   • Reduced cloud spend on Android by 39% in two quarters.
5. Engineering Manager

   Oct 2014 - Mar 2017
   Globe Telecom · 2 yr 5 mo · Full-time · Seoul, South Korea
   • Shipped a rewrite that took build times from 42 minutes to under 2.
   • Built the experimentation framework 10 product teams use to ship changes safely.

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Education

1. Melbourne Business School

   MBA, Business Administration
   2015 - 2017
2. Ateneo de Manila University

   BS, Business Administration
   2010 - 2014