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About the Role

Chewy is seeking a Data Scientist III to join the Experimentation Platform team in Bellevue, WA or Boston, MA. This role supports hundreds of internal users, enabling rigorous A/B testing to drive new customer experiences. You will craft and advance measurement best practices and advanced methodologies, influencing decision-making across the business. This is a high-impact, high-visibility position central to Chewy's core business strategy.

Responsibilities

Apply statistical methodologies to design and analyze online experiments (e.g., A/B/n, MAB, holdouts).
Develop relevant surrogate metrics for faster and more accurate experimentation considering full customer journey and tradeoffs.
Build out and operationalize causal inference models to calculate annualized incremental lift.
Build models to measure long-term impact using high value actions.
Develop robust holdout design to measure aggregate impact, long term impact, and novelty effect.
Support experimentation platform users with guidance on test setup, metric selection, and hypothesis framing.
Ensure quality of data and computation by developing monitoring and alerting mechanisms to catch spillovers and bias and provide guidance on step-wise identification of root-causes.
Define and operationalize experimentation best practices, statistical and scientific methodologies and scalable frameworks for creating, monitoring, and learning from experiments.
Build AI agents to optimize experiment workflows and knowledge retrieval.

Requirements

Bachelor’s degree in a quantitative field (e.g., Statistics, Mathematics, Data Science, Economics, Computer Science) or related experience.
5+ years Data Science experience.
4+ years of experience with A/B testing, preferably within an e-commerce environment.
4+ years of experience with causal inference techniques or modeling long-term treatment effects (Diff-in-diff, Propensity Score Matching, Causal Forest, etc...).
Strong foundational knowledge in statistics (e.g., hypothesis testing, confidence intervals, variance reduction).
Advanced object-oriented programming in Python.
Advanced knowledge of SQL.
Experience communicating insights to non-technical audiences.
Familiarity with using LLMs and AI Agents to automate data and analytical workflows.

Skills

A/B testing
Causal inference
Statistics
Python
SQL
LLMs
AI Agents

Location

Bellevue, WA
Boston, MA

Work Type

Full-time

Experience Level

5+ years Data Science experience
4+ years of experience with A/B testing
4+ years of experience with causal inference techniques

Education Level

Bachelor’s degree in a quantitative field or related experience

Salary/Compensations

The specific salary offered to a candidate may be influenced by a variety of factors including but not limited to the candidate’s relevant experience, education, and work location.

Benefits

401k
New hire and annual equity grant
Annual bonus (for C08+ positions)
Medical/Rx insurance
Vision insurance
Dental insurance
Life insurance
Disability insurance
Hospital indemnity insurance
Critical illness insurance
Accident insurance
Parental leave
Family services benefits
Backup dependent care
Flexible spending accounts
Telemedicine
Pet adoption reimbursement
Employee assistance program
Discounts (10% off pet insurance, 20% off at Chewy.com)
Unlimited PTO (subject to manager approval)
Six paid holidays per year
Paid sick and family leave (in compliance with applicable state and local regulations)

About the Company

Chewy is a leading online retailer dedicated to making the best for pets easy and accessible.
The Experimentation Platform is central to Chewy's core business strategy.

Equal Opportunity

Chewy is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, national origin, gender, citizenship, marital status, religion, age, disability, gender identity, results of genetic testing, veteran status, as well as any other legally-protected characteristic.
If you have a disability under the Americans with Disabilities Act or similar law, and you need an accommodation during the application process or to perform these job requirements, or if you need a religious accommodation, please contact CAAR@chewy.com.
To access Chewy's California CPRA Job Applicant Privacy Policy, please click here.