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Senior, Data Scientist – Conversational AI
10500 Ne 8th St
Bellevue, WA 98004-4345
R-2255794
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$117,000 - $234,000/yr
Regular/Permanent
Salaried

Position Summary...

What you'll do...

Immigration Sponsorship is not available in this role What you'll do... Cortex Team is Walmart's core A.I. conversational platform, powering the vision of delivering the worlds best personal assistants to Walmarts customers, accessible via natural voice commands, text messages, rich UI interactions, and a mix of all of the above via multi-modal experiences.   We believe conversations are a natural and powerful user interface for interacting with technology and enable a richer customer experiences both online and in-store. We are building and designing the next generation of Natural Language Understanding (NLU) services that other teams can easily integrate and leverage, and build rich experiences: from pure voice and text shopping assistants (Siri, Sparky), to customer care channels, to mobile apps with rich, intertwined, multi-modal interaction modes (Me@Walmart).   Interested in diving in? We need passionate and seasoned NLP data-scientists to help us improve and evolve our capabilities, taking into account the full conversational context, multi-modal interactions, and an ever increasing list of use cases.   Come at the right time, and you will have an enormous opportunity to make a massive impact on the design, architecture, and implementation of an innovative, mission critical product, driven by data-science, used every day, by people you know, and which customers love. As part of the emerging tech group, you will also have the additional opportunity of building demos, proof of concepts, creating white papers, writing blogs, etc.   Minimum Qualification
  • Master's degree or certification in Machine Learning, Computer Science, Engineering, Mathematics, Statistics or any other related field.
  • Extensive experience with NLU/NLP, more recent deep ML models (e.g., Transformers, BERT, Llama, GPTs, Gemini) and safe fine-tuning of these.
  • Extensive experience in designing, developing and deploying end-to-end Generative AI systems using transformer-based LLM architectures (both open source and close source)
  • Experience with Python; solid knowledge SQL.
  • Hands on experience with classical ML models, test/train/evaluation metrics, key parameters/techniques that affect model performance
  • Understanding of relevant statistical measures such as confidence intervals, significance of error measurements, development and evaluation data sets.
  • Experience analyzing conversational data to identify patterns and conducting error/deviation analysis; passion for fixing issues in the data and finding the optimal representation.
  • A continuous drive to explore, improve, enhance, automate, and optimize models and products.
  • Excellent oral and written communication skills.
Preferred Qualifications
  • PhD in a relevant field (Machine Learning, Computer Science, Engineering, Mathematics, Physics, Statistics or a related field)
  • Experience developing multimodal solutions for Generative AI and related applications at scale
  • Exposure to real-world, production grade agentic systems.
  • Familiarity with LLMs serving optimizations and multi-LoRa
  • Ability to develop experimental and analytic plans for data modeling processes, use of strong baselines, ability to accurately determine cause and effect relations
  • Hands-on expertise in many disparate technologies and the full model lifecycle, typically ranging from data pipelines, data extraction, model training, model serving, labeling tools, ML-ops, ad-hoc tooling and all points in between.
  • Strong attention to detail and exceptional level of organization
  • Proven ability to achieve results in a fast paced, highly collaborative, dynamic work environmen
      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.
      Sunnyvale, California US-04397: The annual salary range for this position is $117,000.00 - $234,000.00
      Bellevue, Washington US-11075: The annual salary range for this position is $108,000.00 - $216,000.00 Additional compensation includes annual or quarterly performance bonuses. Additional compensation for certain positions may also include :
      - Stock

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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- Bachelor’s degree in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology, or related field and 3 years' experience in an analytics related field. Option 2- Master’s degree in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology, or related field and 1 years' experience in an analytics related field. Option 3 - 5 years' experience in an analytics or related field.

      Preferred 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, Master’s degree 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...

      10500 Ne 8Th St, Bellevue, WA 98004, United States of America

      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.
      Walmart is 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.
      Benefits you’ll enjoy
      Discount Card
      Discount Card
      Get 10% off
      Walmart associates are eligible for a 10% discount card on most regular-priced items and fresh produce in-store and on select items at Walmart.com. Eligible after 90 days of employment.
      Live Better U
      Live Better U
      100% covered
      Earn a degree or in-demand skills certificates with no debt- Walmart covers 100% of tuition and books. Live Better U offers 60+ programs for Associates to pursue their dreams.
      Walmart Academy
      Walmart Academy
      Grow your skills
      Ready to grow your career? Walmart Academy offers job-specific retail training and leadership courses to help Associates reach their career goals.
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      Financial perks
      Enjoy 401(k) matching and stock purchase plans.
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      Paid time off
      Take a break as needed for vacation, sick leave, holidays, parental leave, and more
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      Comprehensive health benefits
      Medical, dental, vision, and wellness programs for you and your family
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      Wellbeing programs
      Access mental health resources and assistance programs for life’s challenges
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      Career growth opportunities
      Training, leadership programs, and clear paths to advance.
      Life at Walmart
      Imagine a workplace surrounded by innovation. At Walmart’s new Home Office in Bentonville, Arkansas, we’re redefining what it means to work at a global leader.
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      Set on 350 acres of thoughtfully revitalized land, our new campus seamlessly integrates the charm of Northwest Arkansas with cutting edge design and technology. From biking trails and outdoor courtyards to flexible, tech-enabled workspaces, every detail reflects our commitment to sustainability, connection, and culture.
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      With amenities like on-site childcare at our Little Squiggles Children’s Enrichment Center, the Walton Family Whole Health & Fitness Center, and a vibrant food hall featuring local and international favorites, we’re creating a space where work-life balance isn’t just a goal—it’s a reality.

      Beyond the campus, Bentonville offers a dynamic lifestyle with world-class dining, art at the Crystal Bridges Museum, and countless outdoor activities.
      Whether you’re exploring High South cuisine, enjoying live performances at our new amphitheater, or cycling the Razorback Greenway, you’ll experience the perfect blend of small-town charm and big-city amenities.
      Join us at Walmart and grow your career alongside a community that feels like home.
      This isn’t just a workplace—it’s a destination for leaders eager to make a difference.
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