Arianna Mariani

S

Senior Data Scientist at BlaBlaCar · Experimentation

BlaBlaCar
Milan, Italy · CET (UTC+1)
10+ years experience
Bocconi University
English, Italian
Learning
Messaging unavailable

Overview

Currently at BlaBlaCar, where I work on experimentation. Cut the time to a trustworthy experiment readout from 2 weeks to 3 days. Ran 266 experiments last year and made the readouts self-serve. Most at home with A/B testing and causal inference. Parent of two, so mostly sleep-deprived.

Good reasons to reach out
  • Mentors who have done this before
  • Speaking or podcast invitations
  • Questions about experimentation
Please don't message about
  • Generic networking requests
  • Offshore staffing offers
  • Agency or outsourcing pitches
Skills
SQLA/B testingBayesian statisticscausal inferenceCUPEDPython
LearningLearning something
closes in 3 months

Looking for feedback on my system design doc from someone in travel

Goal
Prepare for senior interviews in experimentation.
Where I am now
Some experience
Ideal mentor
Someone who has worked in experimentation for a few years
Cadence
Weekly
What I can offer back
Testing and feedback on your projects

10 years in so far. Looking for honest feedback, once or twice a month.

Milan, Italya/b testingcupedcausal inference
Open

Experience

  1. Senior Data Scientist
    Apr 2026 - Present
    BlaBlaCar · 6 mo · Full-time · Milan, Italy
    • Taught SQL to 52 non-analysts.
    • Replaced 74 hand-built dashboards with one metrics layer people trust.
  2. Data Scientist
    Feb 2023 - Mar 2026
    Glovo · 3 yr 1 mo · Full-time · Milan, Italy
    • Replaced 88 hand-built dashboards with one metrics layer people trust.
  3. Data Analyst
    May 2019 - Feb 2023
    Criteo · 3 yr 9 mo · Full-time · Milan, Italy
    • Ran 242 experiments last year and made the readouts self-serve.
    • Wrote the metric definitions the leadership team reviews every week.
  4. Data Analyst
    Feb 2017 - May 2019
    Revolut · 2 yr 3 mo · Full-time · Milan, Italy
    • Ran 119 experiments last year and made the readouts self-serve.

Projects

Open-source Bayesian statistics toolkit
2023

A small library for experimentation that 434 developers star on GitHub.

References

No references yet.

Education

  1. Bocconi University
    BSc, Physics
    2013 - 2016

Details

Compensation expectations
What they are targeting for their next role.
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