Senior Data Scientist

Wal-Mart Stores Texas, LL; Bentonville (AR); Hybrid; USD 90,000 - 180,000; Full time

Benefits offered by this job

Health benefits

401(k) plan

Stock purchase plan

Life insurance

Paid time off

Disability insurance

Education assistance

Company discounts

Job summary

Walmart Inc. in Bentonville, AR is seeking a Senior Data Scientist to apply advanced statistical methods, ML models and feature engineering to business data. You will design experiments, evaluate model performance, and refine features for insights that drive decisions.

You will also help productionize models and support scalable analytics across the organization. The role requires a Master’s degree or equivalent and strong Python/OO programming, with experience in ML frameworks like PyTorch,

Qualifications

• Master’s degree in Computer Science, Statistics, Engineering or related field plus 1 year analytics experience; OR Bachelor’s in related field plus 3 years analytics experience.
• Proficiency in Python and OO programming; strong statistical methods and ML techniques; experience with PyTorch, TensorFlow and Keras.
• Ability to build visualization and analytical models, handle large datasets and run experiments scientifically.

Responsibilities

• Apply feature relevance and selection and conduct exploratory data analysis.
• Develop analytical models using statistical methods and ML techniques.
• Design experiments, evaluate model performance and refine features.
• Support model deployment and scalability for production-grade solutions.

Skills

Python

Statistics

Machine Learning

PyTorch

TensorFlow

Keras

Optimization

SQL

PySpark

Data Visualization

Experiment Design

Education

Master’s degree in Computer Science, Statistics, Engineering or related field

Bachelor’s degree with 3+ years analytics experience

Tools

Seaborn

MATLAB

SQL

PySpark

Job description

This notice is being provided as a result of the filing of an Application for Permanent Alien Labor Certification. Any person may provide documentary evidence bearing on the application to the Certifying Officer of the Department of Labor: U.S. Department of Labor, Employment and Training Administration, Office of Foreign Labor Certification, 200 Constitution Avenue, NW, Room N-5311, Washington, DC 20210

What you’ll do... Position: Senior Data Scientist Job Location: 811 Excellence Dr., Bentonville, AR 72716 Duties: Apply knowledge of feature relevance and selection, exploratory data analysis techniques, advanced statistical methods, and modeling approaches such as graphical models, Bayesian inference, basic natural language processing, computer vision, neural networks, support vector machines, and random forests. Utilize multivariate calculus, statistical foundations of machine learning models, advanced Excel techniques, and programming languages such as R and Python, along with classical and numerical optimization methods including Newton-Raphson, gradient descent, linear programming, integer programming, and quadratic programming. Select appropriate analytical modeling techniques for structured and complex datasets and develop customized analytical models. Conduct exploratory data analysis, including statistical analysis, hypothesis testing, and statistical inference, on available data. Define and refine features based on model performance, introducing new or revised features to improve analytical outcomes. Design experiments by identifying key dimensions, finalizing experimental design, testing hypotheses, and executing analyses. Perform trend and cluster analyses to address business problems and deliver actionable insights and recommendations. Apply knowledge of model fit testing, tuning, and validation techniques, including chi-square tests, ROC curves, root mean square error, and other relevant metrics. Identify appropriate evaluation metrics based on model objectives and business requirements. Assess the impact of variables and features on model performance and apply best-practice testing and tuning techniques to evaluate accuracy, fit, validity, and robustness across multi-stage models and model ensembles. Leverage understanding of model performance drivers, server environments, and model storage formats to support production deployment. Contribute to efforts ensuring analytical models and techniques are production-ready and operationally sustainable. Support model evaluation processes and enable scalability and long-term maintenance of analytical solutions. Utilize programming languages such as SQL, Java, C++, and Python, along with knowledge of business and domain requirements, to develop required solutions and application features. Apply appropriate testing methodologies, including static testing, dynamic testing, software composition analysis, and manual penetration testing, to ensure code quality, functionality, and security.

Minimum education and experience required: Master’s degree or the equivalent in Computer Science, Statistics, Engineering (any), or related field plus 1 year of experience in analytics or a related field; OR Bachelor's degree or the equivalent in Computer Science, Statistics, Engineering (any), or related field plus 3 years of experience in analytics or a related field.

Skills Required: Must have experience with: coding in object-oriented programming languages (Python); applying statistical techniques such as probability, hypothesis testing and regression analysis; applying machine learning techniques (supervised, unsupervised and semi-supervised models) such as linear and logistic regression, decision trees, support vector machines and deep learning models using PyTorch, TensorFlow and Keras; building optimization models; solving optimization models using Integer programming or linear programming; creating clear and informative visualizations of data to convey insights using Seaborn and MATLAB plot; writing SQL queries; working with large datasets with languages such as PySpark; running experiments scientifically; and analyzing experiments results. Employer will accept any amount of graduate coursework, graduate research experience or professional experience with the required skills.

Rate of pay: $90,000.00 - 180,000.00/year. Additional compensation includes annual or quarterly performance incentives.

• 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, education assistance with 100% company paid college degrees, company discounts, military service pay, adoption expense reimbursement, and more.

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.com.

Pay Rate... $0.00 Walmart 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.

Wal‑Mart is an Equal Opportunity Employer. Fifty years ago, Sam Walton started a single mom-and-pop shop and transformed it into the world's biggest retailer. Since those founding days, one thing has remained consistent: our commitment to helping our customers save money so they can live better. Today, we’re reinventing the shopping experience and our associates are at the heart of it. You’ll play a crucial role in shaping the future of retail, improving millions of lives around the world. This is that place where your passions meet purpose. Join our family and create a career you’re proud of.