The second pass of the screen happens here, the closing checkpoint before an interview slot
opens up. A recruiter does take more time at this point, and even then, your present role
still carries roughly 95% of the call.
That holds: nothing speaks to what you can deliver today like the seat you occupy this quarter.
To win a "yes", the block must touch every entry on the Data Scientist role
profile, one line per area named under Domain Expertise. And every line has to come
from work you genuinely owned in production, never a Jira card that brushed past your queue.
1
Modeling & ML Development
You build models that measurably move the business. Models in production read as impact to a hiring
manager; models in notebooks read as homework. Point out how you used gradient boosting and time-series
forecasting, in XGBoost or PyTorch, to lift AUC where it counted and drive decisions the team actually
took.
Techniques
Classification & regression
Gradient boosting
Time-series forecasting
Recommenders
Tools
scikit-learn, XGBoost
PyTorch, TensorFlow
LightGBM
Metrics
Models in production
AUC / RMSE lift
Decisions driven
2
Experimentation & A/B Testing
You find what actually works, and kill what doesn't. Clean experimentation is genuinely hard, so
hiring managers want proof you can call a result and kill a bad idea early, not just launch tests. Walk
them through how you used switchback tests and CUPED variance reduction, on Statsig or Eppo, to ship
more experiments and call them faster.
Techniques
A/B & multivariate
Switchback & geo tests
Power & sample sizing
CUPED variance reduction
Tools
Statsig, Eppo, Optimizely
Bayesian frameworks
Internal A/B platform
Metrics
Tests shipped
Metric lift driven
Bad ideas killed early
3
Statistical Analysis & Inference
You answer what caused what, and how sure you are. Correlation dressed up as causation ships bad
strategy, so hiring managers want to see real inference behind your claims. Lay out how you used causal
inference and Bayesian methods, with DoWhy or PyMC, to deliver studies that held up and reversed a
decision the evidence didn't support.
Techniques
Hypothesis testing
Causal inference
Survival analysis
Bayesian methods
Tools
statsmodels, SciPy
R, PyMC
DoWhy, EconML
Metrics
Studies delivered
Reproducibility rate
Decisions reversed by evidence
4
Feature Engineering & EDA
You dig through the data and build the features that matter. Hiring managers look here to see whether
your features come from understanding the data, or whether you throw every column at a model and hope.
Talk about how you used careful feature creation and a missing-data strategy, in pandas with Feast, to
push model lift from features alone.
Techniques
Feature creation
Encoding & scaling
Missing-data strategy
Cohort & funnel EDA
Tools
pandas, Polars
Feast, Tecton
Jupyter, DuckDB
Metrics
Features in production
Model lift from new features
Data prep time cut
5
Productionization & MLOps
You get models out of the notebook and into production. Latency and drift are numbers a hiring manager
can check, so a model served on cadence beats one that never left the lab. Show them how you used a
model registry and drift monitoring, with MLflow and SageMaker, to hold p95 latency and catch drift
before it degraded.
Techniques
Batch vs online serving
Model registry & versioning
Drift & performance monitoring
Retraining pipelines
Tools
MLflow, Weights & Biases
SageMaker, Vertex AI
FastAPI, Docker
Metrics
Latency (p95)
Models retrained on cadence
Drift caught before degradation
6
Data Storytelling & Communication
You turn a model result into something an exec can act on. A memo that lands multiplies everything else
you did, so it tells a hiring manager you finish the job instead of stopping at the analysis. Spell out
how you used tight executive memos and annotated dashboards, in Notion and Looker, to inform the roadmap
calls that mattered.
Techniques
Executive memos
Readout decks
Annotated dashboards
Recommendation framing
Tools
Looker, Tableau
Plotly, matplotlib
Notion, Google Docs
Metrics
Memos shipped
Roadmap calls informed
Stakeholder NPS
7
Cross-Functional Collaboration
You embed with a product squad and ship science they trust. Companies keep the data scientists product
teams ask for by name, not the ones who work alone for a quarter, so hiring managers look for it.
Mention how you used joint scoping and clean model-product handoffs, planned in Linear or Jira, to get
your models adopted by the teams that own the product.
Techniques
Joint scoping
Model-product handoffs
Office hours
Roadmap planning
Tools
Notion, Confluence
Figma, Miro
Linear, Jira
Metrics
Squads embedded with
Models adopted by Product
Quarterly bets shaped
8
Tooling & Workflow
You make your analyses reproducible six months later. Two things ride on it for a hiring manager: work
anyone can rerun, and a setup new teammates ramp on fast. Tell them how you used version-controlled SQL
and reproducible environments, with Git and Poetry, to make analyses rerunnable end to end and cut
onboarding time.
Techniques
Notebook hygiene
Reproducible environments
Code review for analyses
Version-controlled SQL
Tools
Git, GitHub
Hex, Deepnote, JupyterHub
Poetry, uv
Metrics
Repos maintained
Analyses reproducible end-to-end
Onboarding time cut