(USA) Staff, Software Engineer

Position Summary...

What you'll do...We are building the next generation of AI powered experiences on smart TVs think on device large language models, real time content understanding, privacy preserving audience insights, and interactive generative graphics that transform millions of households to discover, shop, and play. You will be one of the first engineers bridging deep learning research with production code on consumer electronics hardware.

About the team: Walmart's Advertising Technology group enables the connection between supplier brands and retail shoppers at unprecedented scale. We are a highly motivated group of engineers and data scientists, working in an agile group to solve sophisticated and high impact problems. We serve billions of ads requests every month with our high-performance ad servers. There are millions of customers shop on Walmart websites and in stores daily, and advertising helps advertisers bring the best products to our customers. If you want to influence millions of customers on their shopping journeys, we have a role for you. The AdTech M&R data team is responsible for delivering reporting and measurement for Advertisers to analyze and optimize campaigns. We are a team of data developers and machine learning developers whose strengths are: (1) building scalable data pipelines (2) using machine learning techniques and data science (3) making sense of broadly defined problems through data analysis. We are seeking a Staff Software Engineer to architect the future of TV advertising. As viewers shift from linear TV to streaming (CTV/OTT), the engineering challenges are shifting from "web scale" to "broadcast scale."

You will build the backend systems that power Server-Side Ad Insertion (SSAI) and Real-Time Bidding (RTB) for the largest screens in the house. You will own services that must stitch ads into live video streams with frame-perfect accuracy and handle the "Thundering Herd" of millions of concurrent ad breaks during live sports events.

What You’ll Do

• Architect Video Ad Infrastructure: Design high-throughput microservices responsible for SSAI (Server-Side Ad Insertion). You will build the logic that manipulates video manifests (HLS/M3U8, DASH/MPD) to stitch ads seamlessly into content streams.
• Solve "Live Event" Concurrency: Engineer systems capable of scaling from baseline traffic to millions of concurrent requests in seconds (e.g., during the Super Bowl or live Premier League matches).
• Optimization Engines: Build complex bidding agents that solve the "Knapsack problem" in real-time—determining the optimal combination of ads to fill a 60-second commercial break to maximize revenue while respecting brand safety and competitive separation rules.
• Cross-Functional Leadership: Mentor senior engineers, drive technical design reviews, and partner with Product to define the roadmap for our video monetization platform.

What You’ll Bring

• Experience: 8+ years of backend engineering experience, with at least 3 years serving as a Tech Lead or Staff Engineer in a high-volume environment.
• Core Languages: Mastery of Java or Golang. (Experience with C++ or Rust is a plus for core engine work).
• Distributed Systems: Deep understanding of CAP theorem, eventual consistency, distributed caching, and sharding strategies.
• AdTech/High-Performance Background: Proven track record of building systems with strict latency SLAs (e.g., < 100ms end-to-end response times).
• Databases & Caching: Development of services working with high-performance databases (e.g., MS SQL-server, Aerospike, Cassandra, ScyllaDB, Spanner, etc.) and in-memory caches (Redis, Memcached).
• Data Structures: Proven ability to utilize in-memory queues and look-up tables for extreme performance.
• Algorithms: Experience building heuristic data processing/optimization engines (monetization logic, bidding agents, Knapsack problems, similarity/matching algorithms).
• System Design: Expertise in SOA (Service Oriented Architecture) and microservices design patterns.

Preferred Qualifications (CTV/Video Specific)

• Video Protocols: Familiarity with streaming protocols like HLS (HTTP Live Streaming) or DASH.
• Ad Standards: Understanding of IAB standards specific to video, such as VAST (Video Ad Serving Template), VMAP, or OpenRTB 2.6 (Ad Podding).
• Cloud Video Tech: Experience with AWS MediaConvert, MediaTailor, or Google Ad Manager (GAM) for video.

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.

The annual salary range for this position is $143,000.00 - $286,000.00 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 computer science, computer engineering, computer information systems, software engineering, or related area and 4 years’ experience in software engineering or related area.

Option 2: 6 years’ experience in software engineering or related area.

Preferred Qualifications...

Outlined below are the optional preferred qualifications for this position. If none are listed, there are no preferred qualifications.

Master’s degree in Computer Science, Computer Engineering, Computer Information Systems, Software Engineering, or related area and 2 years' experience in software engineering or related area, 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...

680 West California Avenue, Sunnyvale, CA 94086-4834, 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.