Leah Porter

Head of Data at Granite Logistics · Demand forecasting

Granite Logistics

San Jose, CA · PT (UTC-8)

11+ years experience

Wharton

English

Messaging unavailable

Overview

Currently at Granite Logistics, where I lead demand forecasting with a team of 9. Replaced 57 hand-built dashboards with one metrics layer people trust. Before that: Reddit and Stripe. Most at home with inventory optimisation and Python. I tinker with 3D printers.

Good reasons to reach out

Working sessions on Python
Second opinions on inventory optimisation decisions
Thoughtful intros to people in my field

Please don't message about

Offshore staffing offers
Generic networking requests

Travels often; replies within 48 hours

Skills

Pythontime seriesSparkinventory optimisationProphetRSQL

Experience

Head of Data
Jun 2025 - Present
Granite Logistics · 1 yr 4 mo · Full-time · San Jose, CA
- Reduced stock-outs by 34% in the first season.
- Wrote the metric definitions the leadership team reviews every week.
Senior Data Scientist
May 2023 - Jun 2025
Reddit · 2 yr 1 mo · Full-time · San Jose, CA
- Reduced stock-outs by 38% in the first season.
Senior Data Scientist
Apr 2020 - May 2023
Stripe · 3 yr 1 mo · Full-time · San Jose, CA
- Taught SQL to 54 non-analysts.
- Cut forecast error from 21% to 9% across 3815 SKUs.
Data Scientist
Aug 2018 - Apr 2020
Boston Consulting Group · 1 yr 8 mo · Full-time · San Jose, CA
- Cut forecast error from 28% to 10% across 3597 SKUs.
- Replaced 49 hand-built dashboards with one metrics layer people trust.
Data Analyst
Jul 2015 - Aug 2018
Block · 3 yr 1 mo · Full-time · San Jose, CA
- Replaced 50 hand-built dashboards with one metrics layer people trust.

References

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Education

Wharton
MBA, Business Administration
2013 - 2015
Arizona State University
BS, Statistics
2009 - 2013

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