Tiana Danielle Coleman

Head of Data at Onyx HQ | ex-JPMorgan Chase

Onyx HQ

Seattle, WA · PT (UTC-8)

13+ years experience

Rhode Island School of Design

English

Messaging unavailable

Overview

Based in Seattle. I lead recommendation systems at Onyx HQ. Taught SQL to 57 non-analysts. Shipped a ranking change that increased conversion 8.9%. Before that: JPMorgan Chase and Shopify.

Good reasons to reach out

Questions about recommendation systems
Speaking or podcast invitations

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Offshore staffing offers
Generic networking requests
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Skills

embeddingsPyTorchPythonrecommender systems

Experience

Head of Data
Oct 2025 - Present
Onyx HQ · 1 yr · Full-time · Seattle, WA
- Taught SQL to 117 non-analysts.
- Wrote the metric definitions the leadership team reviews every week.
- Moved the homepage from rules to a learned ranker.
Data Scientist
Jul 2022 - Oct 2025
JPMorgan Chase · 3 yr 3 mo · Full-time · Seattle, WA
- Replaced 28 hand-built dashboards with one metrics layer people trust.
Senior Data Scientist
Jul 2019 - Jul 2022
Shopify · 3 yr · Full-time · Seattle, WA
- Moved the homepage from rules to a learned ranker.
Data Analyst
Oct 2017 - Jul 2019
HubSpot · 1 yr 9 mo · Full-time · Seattle, WA
- Replaced 42 hand-built dashboards with one metrics layer people trust.
Data Analyst
Mar 2014 - Oct 2017
Adobe · 3 yr 7 mo · Full-time · Seattle, WA
- Wrote the metric definitions the leadership team reviews every week.

Projects

Write-up: recommendation systems in practice

2026

A long-form guide to recommendation systems for people starting out.

Conference talk: lessons from recommendations

2022

What went wrong and what worked while scaling recommendation systems.

References

No references yet.

Education

Rhode Island School of Design
BFA, Economics
2007 - 2011

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