# Senior Data Scientist
**Company:** [Headway](https://hotfix.jobs/companies/headway)
**Location:** New York, NY, San Francisco, CA, Seattle, WA
**Salary:** $180K-$255K
**Experience:** 6+ years
**Skills:** SQL, Python, R, A/B Testing, Causal Inference, Bayesian Experimentation, Feature Engineering, Model Validation, Cross-Validation, Backtesting
**Posted:** 2026-06-25
> Senior Data Scientist embedded in a product pod to design experiments, run causal analyses, and build predictive models that improve mental healthcare outcomes. Requires 6+ years driving product decisions with strong SQL/Python or R skills.
## Job Description
## What you will do
- Be the analytics partner inside the pod. Work closely with Product, Engineering, Design, Ops, and Clinical stakeholders to define the questions, the metrics, the guardrails, and the decision rules.
- Run rigorous experiments. Design and analyze A/B tests and quasi-experiments with clear hypotheses, power considerations, and pre-defined success criteria.
- Connect behavior to strategy. Use funnel, cohort, segmentation, and lifecycle analysis to understand how people and providers experience Headway, and where product changes will have the biggest impact.
- Use causal inference when experiments are not possible. Apply approaches like diff-in-diff, matching, and regression-based designs with principled uncertainty quantification.
- Build models when they should exist. Develop predictive models that operationalize vetted insights (feature development, validation, backtesting, calibration), with clear launch criteria and monitoring plans.
- Create decision-ready work. Produce analysis and narratives that are crisp, honest about uncertainty, and drive action.
- Help raise the bar. Contribute to shared standards for metrics, experimentation, and analytical quality, so teams can move faster with confidence.

## What will make you successful
- 6+ years using data to drive product or business decisions in product, growth, engineering, or operations environments.
- Strong SQL and strong proficiency in Python or R for analysis and modeling.
- Demonstrated depth in experimentation and causal inference under real-world constraints. Bayesian experimentation experience strongly preferred.
- Practical modeling skill: feature engineering, model comparison, cross-validation or backtesting, calibration, and post-launch monitoring.
- Strong product sense and opinions, including a track record of connecting analytics recommendations to measurable outcomes.
- Clear communication: you can explain complex work to non-technical audiences without losing the truth.
- A self-starter mindset: you prioritize well, follow through, and do not need heavy oversight.
- Motivation for our mission: improving access and affordability in mental healthcare.

## Benefits
- Equity Compensation
- Medical, Dental, and Vision coverage
- HSA / FSA
- 401K
- Work-from-Home Stipend
- Therapy Reimbursement
- 16-week parental leave for eligible employees
- Carrot Fertility annual reimbursement and membership
- 13 paid holidays each year as well as a Holiday Break during the week between December 25th and December 31st
- Flexible PTO
- Employee Assistance Program (EAP)
- Training and professional development
**Apply:** https://hotfix.jobs/jobs/senior-data-scientist-at-headway-416726bf-91c4-4ec4-bf2e-3014a9480cec
**Canonical:** https://hotfix.jobs/jobs/senior-data-scientist-at-headway-416726bf-91c4-4ec4-bf2e-3014a9480cec