Senior Data Scientist

Sam's West, Inc.; Sunnyvale (CA); Hybrid; USD 169,000 - 234,000; Full time

Benefits offered by this job

Health benefits

401(k) and stock purchase programs

PTO & parental leave

Education assistance (company-paid deg

Job summary

Walmart Inc. is seeking a Senior Data Scientist to develop custom data models and analyze large, complex data sets from internal and external sources. You will build predictive models, train algorithms, and validate techniques to drive Walmart eCommerce initiatives.

You'll work with cross-functional teams, deploy scalable models, and explore new techniques using tools like Hadoop, Spark, and Python. The role requires strong statistical foundations and hands-on ML/AI experience, with emphasis on

Qualifications

• Master’s or Bachelor’s degree in Statistics, Economics, Analytics, Mathematics, CS, IT or related field with 1–3 years analytics experience.
• Experience with statistical methods and modeling: graphical models, Bayesian inference, neural networks, SVM, RF.
• Proficiency in Python and R; experience with optimization and numerical methods.
• Experience with SQL/NoSQL databases and big data tools like Hadoop/Spark/Hive.
• Experience with data visualization tools (ggplot, Matplotlib, Plotly, Tableau, PowerBI).
• Experience with NLP tools (NLTK, spaCy, Gensim) and vector databases.

Responsibilities

• Develop custom data models to drive business solutions.
• Build large data sets from multiple sources for predictive models.
• Train and validate models; scale algorithms to large datasets.
• Work with cross-functional partners across Walmart eCommerce.
• Research new industry techniques and apply modern tech (HBase, MapReduce, LAPack, Gurobi).
• Provide analytical support to projects and test/validate models.

Skills

Graphical Models

Bayesian Inference

Neural Networks

SVM

Random Forest

Python

R

Optimization

Newton-Raphson

Gradient Descent

Linear Programming

Integer Programming

Quadratic Programming

SQL

NoSQL

Hadoop

Spark

Hive

Ggplot

Matplotlib

Plotly

Tableau

PowerBI

NLP

NLTK

spaCy

Gensim

Vector Databases

TensorFlow

PyTorch

Git

CI/CD

Model Evaluation

Data Drift Detection

Education

Master's degree in Statistics/Analytics/CS

Bachelor's degree in Statistics/Analytics/CS

Tools

MySQL

Hadoop

Weka

R

MATLAB

IGo

IGauss

Job description

Position:

Senior Data Scientist

Job Location:

1375 Crossman Avenue, Sunnyvale, CA 94089

What you\'ll do:

Develop custom data models to drive innovative business solutions. Build complex data sets from multiple data sources, both internally and externally. Conduct advanced statistical analysis to determine trends and significant data relationships. Build learning systems to analyze and filter continuous data flows and offline data analysis. Train algorithms to apply models to new data sets. Validate models and algorithmic techniques. Scale new algorithms to large data sets. Combine data features to determine search models. Research new techniques and best practices within the industry. Utilize system tools including MySQL, Hadoop, Weka, R, Matlab, and ILog. Analyze large data sets to develop custom models and algorithms to drive business solutions. Work on project teams to provide analytical support to projects for Walmart eCommerce. Build large data sets from multiple sources to build algorithms for predicting future data characteristics. Those algorithms will be tested, validated, and applied to large data sets. Train the algorithms so they can be applied to future data sets and provide the appropriate search results. Research new trends in the industry and utilizing up-to-date technology (for example, HBase, MapReduce, LAPack, Gurobi) and analytical skills to support assigned projects. Work with cross-functional partners across the business. Develop models of current state to determine needed improvements.

Minimum education and experience required:

Master’s degree or the equivalent in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology, or related field and 1 year of experience in an analytics related field; OR Bachelor’s degree or the equivalent in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology, or related field and 3 years of experience in an analytics related field.

Skills required:

Experience with statistical methods and modeling techniques: Graphical Models, Bayesian Inference, Neural Networks, SVM, and Random Forest. Experience coding in object-oriented programming languages and statistical tools: Python and R. Experience with optimization techniques: Newton-Rapson Methods and Gradient Descent. Experience with numerical methods of optimization: Linear Programming, Integer Programming, and Quadratic Programming. Experience with database technologies and distributed datastores: SQL and NoSQL. Experience with big data technologies: Hadoop, Spark, and Hive. Experience with data visualization tools: Ggplot, Matplotlib, Ploty, Tableau, and PowerBI. Experience with data ecosystem application including Data Management, Data Quality Standards and Data Governance, Accessibility, Storage, and Scalability. Experience with Natural Language Processing (NLP) tasks, including text classification and sentiment analysis, and using NLTK, spaCy, and Gensim. Experience with Vector Databases and designing, implementing, and managing vector databases. Experience with vector similarity search and indexing. Experience with machine learning algorithms, neural networks, and deep learning frameworks: TensorFlow and PyTorch. Experience using Git for code versioning, including managing repositories, branching and merging, and collaborating via platform: GitHub. Experience designing and implementing CI/CD pipelines, enabling automated testing, integration, and deployment of code to ensure rapid, reliable, and streamlined software releases. Experience with model evaluation and data drift detection.

Salary Range:

$168,917/year to $234,000/year. Additional compensation includes annual or quarterly performance incentives.

Benefits:

At Walmart, we offer competitive pay as well as performance-based incentive 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, 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.

Equal Opportunity Employer:

Wal-Mart is an Equal Opportunity Employer. This policy applies to all employees and aims to create a safe and productive work environment.

Company Culture:

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.