ELENA PETROVA
Data Scientist / Portfolio Reel

Turn raw data
into signals.

A data scientist who blends statistical thinking, machine learning and clear storytelling to turn complex systems into decisions people can act on.

Precision ↑Insights / 24Models in motion
01 / SIGNAL

Evidence, not noise.

The best analysis feels inevitable after you see it. My work focuses on making that path from messy evidence to confident action visible.

7+Years solving with data
34+Experiments & models shipped
18+Business decisions influenced
6+Data domains explored
"A model is only valuable when its uncertainty is understood, and its result changes what happens next."
ABOUT THE PRACTICE

I work across the full analytical arc: framing ambiguous questions, auditing data quality, engineering useful features, building interpretable models and translating results into decisions.
02 / WORK

Models with a point of view.

CASE 01 · DEMAND+19%

Forecasting demand before the rush

Built a probabilistic forecasting workflow that combined historical seasonality, promotional signals and external features. The output was designed for planners, not just model evaluation.

Time-series modelingFeature engineeringScenario planning
CASE 02 · RISK-31%

Finding the early signals of churn

Mapped behavioral patterns into a calibrated risk score and surfaced the why behind each prediction so retention teams could prioritize meaningful interventions.

ClassificationExplainabilityCohort analysis
CASE 03 · DISCOVERY12×

From fragmented records to one decision layer

Designed a reproducible analytics pipeline that unified disconnected sources, exposed quality checks and gave stakeholders a faster path from question to evidence.

SQLPythonData quality
03 / TOOLKIT

A field kit, not a checklist.

Python
analysis · ML
SQL
data fluency
Statistics
inference
ML
prediction
Storytelling
decisions
04 / METHOD

Question → evidence → action.

01

Frame

Turn an ambiguous request into a measurable decision problem.

02

Interrogate

Profile sources, test assumptions and find the shape of the data.

03

Model

Choose the simplest rigorous method that earns the answer.

04

Translate

Deliver the evidence in a form that changes the next decision.

05 / TRAJECTORY

Experience in sequence.

NOW

Senior Data Scientist · Product & Growth

Leading experimentation, predictive analytics and measurement design across high-impact product questions.

PREVIOUS

Data Scientist · Analytics Lab

Built forecasting and classification systems while partnering directly with operations and strategy teams.

FOUNDATION

Analyst to Data Scientist · Insights Team

Started with exploratory analysis and grew into end-to-end model development, deployment and decision communication.

NEXT QUESTION

Got a dataset
with a story hiding inside?

✉ elena@example.com
☎ +31 20 555 0129
◈ Amsterdam, NL