Bayu Hartono

Sample

Director of Data Science, Trellis Bio - time series · inventory optimisation · Python

Trellis Bio
Jakarta, Indonesia · WIB (UTC+7)
12+ years experience
University of Hong Kong
English, Bahasa Indonesia
Messaging unavailable

Overview

12 years in data science and analytics, the last 2 at Trellis Bio, where I lead the forecasting team. Reduced stock-outs by 31% in the first season. Wrote the metric definitions the leadership team reviews every week. Yoga every morning.

Good reasons to reach out
  • Thoughtful intros to people in my field
  • Second opinions on time series decisions
Please don't message about
  • Crypto token projects
  • Unpaid work or spec projects
  • Offshore staffing offers

Prefers short, specific messages

Skills
SQLProphetinventory optimisationSparkPythontime series

Experience

  1. Director of Data Science
    Sep 2024 - Present
    Trellis Bio · 2 yr 1 mo · Contract · Jakarta, Indonesia
    • Cut forecast error from 29% to 6% across 749 SKUs.
    • Built the forecasting models now used in 10 product decisions a quarter.
  2. Analytics Manager
    May 2023 - Sep 2024
    Ashford Logistics · 1 yr 4 mo · Full-time · Jakarta, Indonesia
    • Replaced 103 hand-built dashboards with one metrics layer people trust.
    • Cut forecast error from 23% to 12% across 3492 SKUs.
  3. Analytics Manager
    Sep 2020 - Mar 2023
    ByteDance · 2 yr 6 mo · Full-time · Jakarta, Indonesia
    • Wrote the metric definitions the leadership team reviews every week.
  4. Data Analyst
    Aug 2017 - Sep 2020
    Traveloka · 3 yr 1 mo · Full-time · Jakarta, Indonesia
    • Wrote the metric definitions the leadership team reviews every week.
    • Taught SQL to 109 non-analysts.
  5. Data Scientist
    Oct 2014 - Aug 2017
    Foxconn · 2 yr 10 mo · Full-time · Jakarta, Indonesia
    • Taught SQL to 129 non-analysts.

Projects

Open-source SQL toolkit
2023

A small library for demand forecasting that 385 developers star on GitHub.

References

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Education

  1. University of Hong Kong
    BSc, Computer Science
    2009 - 2013

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