Tessa Dean

Software Engineer at Amazon · Search and ranking · A/B testing, learning to rank

Amazon

Calgary, AB · MT (UTC-7)

1+ years experience

Western University

English

Collaborating

Messaging unavailable

Overview

I work on search and ranking at Amazon in Calgary. Brought on-call pages for search down from 40 a week to 1. Moved 75% of search traffic off a legacy monolith without a customer-facing incident. Most at home with Python and A/B testing. Jazz piano, badly.

Good reasons to reach out

Collaborators for my side project
Second opinions on learning to rank decisions
Working sessions on Java
Speaking or podcast invitations

Please don't message about

Courses and coaching offers
Offshore staffing offers

Replies on weekends

Skills

ScalaA/B testinglearning to rankJavaPython

CollaboratingLooking to collaborate

closes in 3 months

Looking for collaborators on an open-source Scala toolkit

Project: An open-source Scala toolkit
Skills needed: Writing, Python
Time commitment: Part-time
Outcome: Open-source release

Will credit everyone who contributes. Some groundwork already done.

Calgary, ABscalapythonlearning to rank

Open

Experience

Software Engineer
Apr 2026 - Present
Amazon · 6 mo · Full-time · Calgary, AB
- Shipped a rewrite that took build times from 42 minutes to under 2.
- Moved 77% of search traffic off a legacy monolith without a customer-facing incident.
- Cut p99 latency on the search services from 689ms to 91ms.

Projects

Side project: a recipe search engine

2025

Built with learning to rank and Java. 1023 people used it last year.

Search and ranking benchmark

2023

Reproducible benchmarks comparing A/B testing and Java on real workloads.

References

No references yet.

Education

Western University
HBA, Computer Engineering
2020 - 2024

Details

Compensation expectations

What they are targeting for their next role.

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