(USA) Principal, Software Engineer

Walmart

Actively hiring

Sunnyvale, CA · Bellevue, WA Posted 21 days ago $143,000–$286,000 / year

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At a glance

AI generated

TL;DR

As a Principal Software Engineer on Walmart’s Display Ads Serving team, you will design and optimize core machine learning models that enhance ad ranking and optimization systems. Your day-to-day responsibilities include collaborating with Data Science and Product teams to gather requirements and formulate problems, independently executing feature engineering and offline model training, leading discussions on new technologies, and iterating on model tuning for continuous improvement. You will build scalable data pipelines, apply advanced AI/ML techniques to improve shopper intent understanding and contextual relevance, extract insights from production data, and stay updated with industry trends to enhance team performance. The role requires proficiency in languages like Java, Python, or C++, experience with high-throughput ML algorithms, a solid grasp of machine learning and deep learning, familiarity with LLM applications for relevance scoring, and ideally, AdTech experience.

Skills

Python Java C++ MachineLearning DeepLearning DataPipelines AI ML LLM CI/CD

What you'll do

Design, implement, and optimize core machine learning models for Walmart's ad ranking systems.
Work with Data Science to gather requirements and formulate problems for ML solutions.
Build scalable data pipelines for feature engineering in ad serving technologies.
Apply AI/ML technologies to enhance shopper intent understanding and contextual relevance.
Extract insights from production data to improve model performance continuously.

What we're looking for

Proficient in Java, Python, C++, or similar programming languages.
Extensive experience training and deploying high-throughput machine learning algorithms.
Strong understanding of popular ML algorithms and hands-on deep learning expertise.
Familiarity with LLM applications for relevance scoring and engagement predictions.
Bachelor's degree in computer science or related field; advanced degrees preferred.

Market check

Salary context

This $143,000–$286,000 range sits above 94% of similar postings on FindRole.

Peer median band

$117,000–$234,000

Median floor and ceiling across peers.

Typical midpoint (25–75%)

$165,000–$214,500

Middle half of comparable postings.

Based on 240 comparable postings.

* 240 is the maximum number of comparable postings sampled.

Employer

About Walmart

Walmart Inc. is the world''s largest retailer by revenue, operating a chain of hypermarkets, discount department stores, and grocery stores, as well as a growing e-commerce presence through Walmart.com. Industry: General Merchandise & Grocery Retail

Walmart currently has 495 open roles on FindRole.

Listed pay typically runs $117,000–$234,000 across 487 roles with salary data.

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View all roles at Walmart

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