Julien Mercier

Data Analyst at Wealthsimple · Bayesian statistics, Python

Wealthsimple

Waterloo, ON · ET (UTC-5)

1+ years experience

University of Alberta

English

Open to work

Messaging unavailable

Overview

I've spent 1 years on experimentation, now at Wealthsimple. Cut the time to a trustworthy experiment readout from 2 weeks to 6 days. I speak at conferences a couple of times a year.

Good reasons to reach out

Roles in experimentation
Questions about experimentation
Speaking or podcast invitations
Second opinions on Bayesian statistics decisions

Please don't message about

Data broker offers
Unpaid work or spec projects
Agency or outsourcing pitches

Travels often; replies within 48 hours

Skills

Bayesian statisticsSparkCUPEDPython

Open to workLooking for a role

closes in 3 months

Next role: Data Analyst in biotech, Waterloo or hybrid

Target roles: Data Analyst
Level: Mid
Industries: Fintech, Healthtech
Work mode: Hybrid
Available: 90 days notice
Work authorization: Authorized to work in the ON
What I'm looking for: Hands-on work on CUPED with room to mentor.
Not interested in: Agencies and outsourcing firms

1 years in experimentation. Strongest at Spark and Bayesian statistics. Available immediately.

Waterloo, ONbayesian statisticspythonspark

Open

Experience

Data Analyst
Oct 2025 - Present
Wealthsimple · 1 yr · Full-time · Waterloo, ON
- Wrote the metric definitions the leadership team reviews every week.
- Taught SQL to 84 non-analysts.
- Ran 95 experiments last year and made the readouts self-serve.

Projects

Side project: a budgeting app

2026

Built with Python and Bayesian statistics. 1080 people used it last year.

Conference talk: lessons from experimentation

2023

What went wrong and what worked while scaling experimentation.

References

No references yet.

Education

University of Alberta
BSc, Economics
2021 - 2025

Details

Compensation expectations

What they are targeting for their next role.

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Direct contact details

Direct email and a scheduling link.