Health Data Scientist Jobs (NOW HIRING)

Position Summary...Join Walmart’s Consumer Health & Data Solutions team to build data science products that help customers eat healthier and make more informed wellness choices. As a Staff Data Scientist, you’ll develop recommendation systems, behavioral “signals” models, and health-focused chatbot capabilities—taking work from data sourcing and experimentation through evaluation and production partnership. You’ll collaborate closely with product and data engineering while owning model quality, insights, and measurable impact.What you'll do...

• Build and improve ML systems for recommendations, behavioral signals, and nutrition-focused chatbot experiences.
• Lead the design and implementation of predictive models, recommender systems, customer segmentation and other advanced analytics projects.
• Develop and execute data-driven solutions for various initiatives, such as personalized product and content recommendations, health coaching, customer segmentation in the consumer health space, and product assortment in retail space.
• Experience creating, finetuning and validating boosted tree-based models, for balanced as well as imbalanced problems. 
• Collaborate with cross-functional teams to integrate data insights into product development, educational and outreach campaigns, and operational processes. 
• Identify fit-for-purpose data sources, run initial data quality checks, and translate product questions into modeling approaches.
• Evaluate and tune models using appropriate metrics (e.g., ROC, RMSE) and robust validation practices.
• Partner with data engineering to deploy, scale, and monitor models in production.
• Communicate results through clear visualizations and stakeholder-ready narratives.

What you’ll bring...

• Ph.D. or master’s degree in computer science, statistics, mathematics, data science, or a related field.
• Strong applied ML background, including deep learning and embeddings; GenAI experience is a plus.
• Experience with recommendation and/or search-style problems beyond collaborative filtering-only approaches.
• Proficiency in Python and SQL with large-scale data (e.g., BigQuery).
• Demonstrated skill in model testing/tuning/validation and production-minded measurement.

Preferred Qualifications (Nice to Have)

• Experience with bias analysis, fairness metrics, and model explainability techniques.
• Experience with time-series or other temporal modeling.
• Experience building personalization systems for recommendations and/or search.
• Experience with generative AI methods and/or recommendation + generative approaches.
• Experience with big data and orchestration tools (e.g., Spark, Airflow, BigQuery).
• Familiarity with health and wellness products, services, or research environments.
• Experience in retail, eCommerce, and/or omnichannel domains.
• Knowledge of privacy and compliance considerations for health-related data (e.g., HIPAA concepts).
• Experience working in an Agile environment.

About the Team... The Consumer Health & Data Solutions team consists of:

• Incubation: includes Walmart Everyday Health Signals (EHS), a health insights product, and Walmart's Nutrition Hub, which supports personalized healthy eating powered by EHS
• Digital Business Services: includes customer identity, digital engagement, and business analytics to support health and wellness lines of business

The above information has been designed to indicate the general nature and level of work performed in the role. It is not designed to contain or be interpreted as a comprehensive inventory of all responsibilities and qualifications required of employees assigned to this job. The full Job Description can be made available as part of the hiring process. This role is based on-site in Sunnyvale, California. #LI-DM1 At Walmart, we offer competitive pay as well as performance-based bonus awards and other great benefits for a happier mind, body, and wallet. Health benefits include medical, vision and dental coverage. Financial benefits include 401(k), stock purchase and company-paid life insurance. Paid time off benefits include PTO (including sick leave), parental leave, family care leave, bereavement, jury duty, and voting. Other benefits include short-term and long-term disability, company discounts, Military Leave Pay, adoption and surrogacy expense reimbursement, and more. You will also receive PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes. The amount you receive depends on your job classification and length of employment. It will meet or exceed the requirements of paid sick leave laws, where applicable. For information about PTO, see https://one.walmart.com/notices. Live Better U is a Walmart-paid education benefit program for full-time and part-time associates in Walmart and Sam's Club facilities. Programs range from high school completion to bachelor's degrees, including English Language Learning and short-form certificates. Tuition, books, and fees are completely paid for by Walmart.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to a specific plan or program terms.
For information about benefits and eligibility, see One.Walmart.
The annual salary range for this position is $143,000.00 - $286,000.00 Additional compensation includes annual or quarterly performance bonuses. Additional compensation for certain positions may also include :
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Minimum Qualifications...

Outlined below are the required minimum qualifications for this position. If none are listed, there are no minimum qualifications.

Option 1: Bachelors degree in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology or related field and 4 years' experience in an analytics related field. Option 2: Masters degree in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology or related field and 2 years' experience in an analytics related field. Option 3: 6 years' experience in an analytics or related fieldPreferred Qualifications...

Outlined below are the optional preferred qualifications for this position. If none are listed, there are no preferred qualifications.

Data science, machine learning, optimization models, PhD in Machine Learning, Computer Science, Information Technology, Operations Research, Statistics, Applied Mathematics, Econometrics, Successful completion of one or more assessments in Python, Spark, Scala, or R, Using open source frameworks (for example, scikit learn, tensorflow, torch), We value candidates with a background in creating inclusive digital experiences, demonstrating knowledge in implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards, assistive technologies, and integrating digital accessibility seamlessly. The ideal candidate would have knowledge of accessibility best practices and join us as we continue to create accessible products and services following Walmart’s accessibility standards and guidelines for supporting an inclusive culture.Primary Location...809 11th Ave, Sunnyvale, CA 94089-4731, United States of AmericaWalmart and its subsidiaries are committed to maintaining a drug-free workplace and has a no tolerance policy regarding the use of illegal drugs and alcohol on the job. This policy applies to all employees and aims to create a safe and productive work environment.