Mai Emi Yamaguchi

Overview

Currently at Carrow Logistics, where I work on data pipelines. Moved 81% of data platform traffic off a legacy monolith without a customer-facing incident. Brought on-call pages for data platform down from 17 a week to 4. Before that: PwC and ByteDance. Most at home with Spark and SQL.

Prefers short, specific messages

Experience

1. Principal Engineer

   Aug 2024 - Present
   Carrow Logistics · 2 yr 2 mo · Full-time · Osaka, Japan
   • Previously an operator for 7 years before investing.
   • Led or co-led 7 investments, 6 of them now at Series B or later.
2. Staff Data Engineer

   Jul 2022 - Aug 2024
   PwC · 2 yr 1 mo · Full-time · Osaka, Japan
   • Wrote the metric definitions the leadership team reviews every week.
3. Data Engineer

   Jan 2021 - Jul 2022
   ByteDance · 1 yr 6 mo · Contract · Osaka, Japan
   • Replaced 52 hand-built dashboards with one metrics layer people trust.
   • Taught SQL to 157 non-analysts.
4. Engineering Manager

   Jan 2018 - Jan 2021
   KPMG · 3 yr · Full-time · Osaka, Japan
   • Reduced cloud spend on data platform by 30% in two quarters.
   • Brought on-call pages for data platform down from 23 a week to 1.
5. Data Engineer

   Jun 2014 - Jan 2018
   SoftBank · 3 yr 7 mo · Full-time · Osaka, Japan
   • Replaced 78 hand-built dashboards with one metrics layer people trust.
   • Reduced stock-outs by 22% in the first season.

No references yet.

Education

1. UNSW Sydney

   BEng, Information Technology
   2008 - 2012