Full-Time

Principal Data Scientist

Updated on 8/23/2026

Walmart

Walmart

10,001+ employees

Global retailer of groceries and essentials

Compensation Overview

$110k - $220k/yr

+ Performance bonuses

Company Historically Provides H1B Sponsorship

Bentonville, AR, USA

In Person

Bachelor's, Master's, PhD

Category
Data & Analytics (1)
Required Skills
LLM
Scikit-learn
MLOps
Python
Data Visualization
Data Science
TensorFlow
R
Apache Spark
SQL
Machine Learning
RAG
Scala
Observability

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Requirements
  • Deep experience building and deploying machine learning and large language model or agentic systems in production.
  • Strong Python and SQL skills, with solid software engineering and machine learning operations or large language model operations skills.
  • Hands-on expertise with agentic frameworks, tool-calling, retrieval-augmented generation, and prompt and evaluation design.
  • Proven ability to design evaluation, guardrails, and observability for generative artificial intelligence.
  • Ability to translate ambiguous business needs into scalable, well-architected artificial intelligence solutions.
  • A track record of technical leadership, including setting direction, raising standards, and mentoring teams.
  • A bachelor's degree in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology, or a related field with five years of analytics-related experience; or a master's degree in one of those fields with three years of analytics-related experience; or seven years of experience in an analytics or related field.
Responsibilities
  • Architect and scale agentic artificial intelligence copilots that help merchants and business teams make faster, sharper decisions.
  • Design and ship large language model and agentic systems, including tool-calling, retrieval, and multi-step reasoning, from prototype to production.
  • Build rigorous evaluation, guardrails, and observability so artificial intelligence solutions remain accurate, safe, and trusted at scale.
  • Turn complex business workflows and large datasets into reliable, high-impact artificial intelligence capabilities.
  • Partner with product, engineering, and business stakeholders to translate real problems into technical solutions.
  • Set technical direction and mentor data scientists on agentic artificial intelligence, modeling, and engineering best practices.
Desired Qualifications
  • Experience with data science, machine learning, and optimization models.
  • A PhD in Machine Learning, Computer Science, Information Technology, Operations Research, Statistics, Applied Mathematics, or Econometrics.
  • Publications or active peer-reviewer experience in related journals or conferences.
  • Successful completion of one or more assessments in Python, Spark, Scala, or R.
  • Experience using open-source frameworks such as scikit-learn, TensorFlow, or Torch.
  • Background in creating inclusive digital experiences, including knowledge of Web Content Accessibility Guidelines 2.2 AA standards, assistive technologies, and digital accessibility best practices.

Walmart operates as a global retailer with a network of hypermarkets, discount department stores, and grocery stores, plus an online shopping platform. It sells groceries, apparel, electronics, and household items through its stores and Walmart.com, along with financial services and health offerings like pharmacies. Its business model centers on offering a wide range of products at low prices by maintaining a large-scale, efficient supply chain and bulk purchasing. This setup enables both in-store and online shopping, with growing emphasis on e-commerce as demand shifts. Walmart differentiates itself through massive store networks, everyday low prices, integrated omnichannel shopping, and a focus on community support and essential services, including vaccination efforts and veteran programs. The company’s goal is to help people save money and access essential goods and services for their families and communities.

Company Size

10,001+

Company Stage

IPO

Headquarters

Bentonville, Arkansas

Founded

1962

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Simplify Jobs

Simplify's Take

What believers are saying

  • August 24, 2026 Apple Pay rollout removes checkout friction across Walmart and Sam's Club.
  • Q2 FY2027 e-commerce rose 24%, advertising 38%, and marketplace 52% in the U.S.
  • Walmart received about $2.9 billion in tariff refunds and is funding rollbacks, boosting share gains.

What critics are saying

  • Tariff refund profit masks softer U.S. demand and margin pressure in Q3 2026.
  • May 2026 cut or relocation of 1,000 corporate workers signals ongoing reorganization strain.
  • Amazon, Costco, and Temu erode Walmart’s pricing and assortment edge; one slip breaks traffic.

What makes Walmart unique

  • Walmart pairs 10,900 stores with pickup, delivery, and Marketplace breadth globally.
  • Walmart Connect and VIZIO create a retailer-owned ads stack competitors cannot match.
  • Mexico cross-border Walmart.com access expands seller reach without new listings.

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Benefits

PTO: Paid vacation, sick time, personal time and holiday time

10% discount on regularly priced general merchandise and fresh fruits and vegetables

6% 401(k) match to all employees, including hourly workers, after one year

Roth IRA available

Associate Stock Purchase Plan

maximum and eligible preventive care covered at 100%

Health reimbursement plans

Growth & Insights and Company News

Headcount

6 month growth

-2%

1 year growth

-2%

2 year growth

-5%
Yahoo Finance
Aug 23rd, 2026
Walmart and Target receive $4B in tariff refunds as White House threatens to reclaim funds

Major US retailers are receiving billions in tariff refunds after the Supreme Court ruled certain duties were illegally imposed. Walmart is getting approximately $3 billion and Target $1 billion, with over 40 S&P 500 companies expecting $9.6 billion in total refunds. The refunds stem from tariffs paid on imported goods before the court ruling. Treasury Secretary Scott Bessent criticised the process as a "corporate bonanza," stating the administration has devised a legal workaround to reclaim tariff income. US Customs and Border Protection has issued $100 billion in refunds according to court filings. Target and Walmart executives said they're using the funds to reduce prices on thousands of items, including ground beef and school supplies. Target lowered prices on 10,000 items over the past year.

Yahoo Finance
Aug 21st, 2026
Major US retailers pocket $5B in tariff refunds as Walmart gets $2.9B, Target $994M, but shoppers see little benefit

Major US retailers have received over $5 billion in tariff refunds this week alone, with Walmart getting $2.9 billion, Target $994 million, and Home Depot $730 million. The Trump administration is refunding approximately $166 billion in tariff revenue after the Supreme Court struck down its sweeping tariff policy, having returned $100 billion so far. Despite studies showing consumers bore the brunt of initial tariff costs through higher prices, most companies are reinvesting the refunds rather than passing savings to shoppers. Retail executives indicated in earnings calls they plan to put the money back into their businesses. Consumers have filed class-action lawsuits against companies receiving refunds, but none have concluded. Americans have limited recourse to recover funds if companies don't voluntarily lower prices.

ECIKS.org
Aug 21st, 2026
Walmart launches tap to pay with Apple Pay, Google Pay starting aug. 24.

Walmart launches tap to pay with Apple Pay, Google Pay starting aug. 24. Published on 21 August 2026 at 12:16 pm - Written by Chris Martin - Reading duration: 2 minutes Walmart is launching tap-to-pay support with Apple Pay and Google Pay starting August 24, ending a decade-long holdout against contactless payment methods at the nation's largest retailer. The rollout will begin at select Walmart and Sam's Club locations on August 24, with plans to expand to all U.S. stores and clubs by the end of 2026 and fuel stations by mid-2027, according to a company announcement. Customers will be able to use eligible contactless cards, phones, or smartwatches, and can add their Walmart and Sam's Club cards to digital wallets including Apple Wallet and Google Wallet. Walmart's decision marks a significant shift for a retailer that has long resisted Apple Pay and other NFC-based payments. In January 2026, just months before this announcement, Walmart reiterated its commitment to its own payment systems, stating it did not accept NFC payments and instead promoted Walmart Pay and Scan and Go as more convenient solutions. Walmart Pay, launched in 2016, uses QR code technology rather than NFC tap-to-pay, requiring customers to scan a code from their Walmart app at checkout. Scan and Go allows Walmart+ and Sam's Club members to scan items as they shop and bypass traditional checkout entirely. Both systems tie transactions directly to customer Walmart accounts, giving the retailer detailed purchase data for targeting and marketing purposes. The primary reason Walmart resisted Apple Pay was data collection. Unlike Walmart Pay, Apple Pay uses tokenization technology that prevents merchants from seeing actual card details or building detailed customer profiles. When customers use Apple Pay or other third-party digital wallets, Walmart receives far less transaction information than it does from its proprietary systems. Joining the majority of retailers. Walmart's move follows similar reversals by other major retailers that held out against contactless payments. Kroger, which refused Apple Pay for nine years, began accepting it in April 2023, according to American Banker. Home Depot launched Apple Pay support in October 2024, and H-E-B followed suit in October 2024 as well. Tap-to-pay technology is now accepted at more than 85% of retailers across the U.S., making Walmart's previous stance increasingly isolated. The expansion reflects broader consumer expectations for mobile payment options and the maturation of contactless technology as a standard payment method rather than a niche feature. The rollout will occur alongside Walmart's existing payment methods, including traditional cards, cash, and its proprietary systems. This approach gives customers flexibility while maintaining Walmart's ability to collect data through its own app-based payments for those who choose to use them. Sources. * 9to5Mac - Walmart announcement of August 24 launch date and rollout timeline; decade-long holdout context; Kroger, Home Depot, and H-E-B adoption details * mlive.com - Confirmation of tap-to-pay rollout details and 85% retailer adoption rate * American Banker - Kroger's nine-year Apple Pay boycott and April 2023 acceptance Give your feedback. Chris Martin is a US economics and current affairs journalist covering the intersection of policy, markets, and everyday financial life. With a background in financial reporting and a sharp eye for the stories behind the numbers, Chris brings clarity to some of the most complex issues shaping the American economy today. At ECIKS.org, Chris covers breaking developments across domestic economic policy, business strategy, Wall Street movements, and political decisions that ripple through financial markets. His reporting blends rigorous data analysis with accessible storytelling making critical information useful for investors, entrepreneurs, and engaged citizens alike. ECIKS.org is an independent media. Support ECIKS by adding ECIKS to your Google News favorites:

Dataconomy Media GmbH
Aug 21st, 2026
Walmart to launch support for Apple Pay next week after years of resistance.

Walmart to launch support for Apple Pay next week after years of resistance. Walmart has announced that it will begin rolling out support for Apple Pay next week, marking a significant shift for the retailer after over a decade of resistance to the payment method. This development comes amid increasing pressure from consumers who have long sought the convenience of Apple's contactless payment system. The rollout will start on August 24 at select Walmart and Sam's Club locations, with plans to extend the feature to all stores across the United States by the end of the year. Additionally, Walmart aims to implement Apple Pay support at its fuel stations by mid-2027. The company stated, "Tap to Pay gives customers and members another familiar and convenient way to pay at checkout using contactless payment methods." This feature allows customers to use eligible contactless cards, phones, or smartwatches for their purchases, enhancing the shopping experience by streamlining the checkout process. Stay ahead of the curve! This announcement is particularly notable as Walmart has been one of the last major holdouts against Apple Pay, having previously favored its own QR code-based payment solution, Walmart Pay. With this change, Walmart is expected to attract more customers who prefer using Apple Pay for their transactions.

Yahoo Finance
Aug 21st, 2026
Target's grocery sales surge 7.2% as Walmart widens price gap with conventional grocers

Target and Walmart are leaning on grocery to navigate economic challenges, with each retailer taking a distinct approach, according to their second-quarter earnings results. Target's food and beverage sales grew 7.2%, outpacing its roughly 3% comparable store sales increase. The retailer has focused on product discovery, trendiness and revamping its centre store selection to revive its reputation. Walmart's US grocery category recorded mid-single-digit comparable growth, exceeding its 2.6% comparable-store sales increase excluding fuel. The company is emphasising low prices and convenience through meal delivery options and temporary price cuts. "Our price gaps to conventional grocers here in the US are strong, and they continue to widen," said Walmart CEO John Furner. Both strategies align with each retailer's core brand identity whilst helping them maintain resilience amid food affordability concerns and rising costs.