(USA) Principal, Software Engineer

Position Summary...As a Principal Engineer, you will joining a team who will be designing, building, and maintaining native / hybrid apps for multiple TV operating systems (Tizen, webOS, Roku, Android TV/Fire TV, Vidaa, Vizio, etc.). You will create cross‑platform SDK layers (TypeScript / C++ / Rust “core”) that expose a single API surface to product teams while calling OS‑specific services under the hood. What you'll do...

• Optimize video playback pipelines—HLS/DASH, Widevine/PlayReady/FairPlay DRM, HDR tone‑mapping—so 4K content hits frame budget and QA thresholds on each SoC.
• Integrate ad‑tech components (IMA, VAST/VMAP, SSAI beacons, OMID) with tight SLA for mid‑rolls, dynamic pods, and interactive overlays.
• Automate CI/CD: containerized build farms, device‑cloud testing (Bitrise, BrowserStack, LambdaTest), firmware signing, and phased rollouts.
• Deep‑dive debug & perf profiling—memory, GPU bandwidth, GC pauses—and guide OEM partners on kernel or firmware fixes.
• Mentor & document: publish coding patterns, lint rules, sample apps, and brown‑bag talks for the broader engineering org.

Must‑Have Qualifications

• 15+ years shipping production software for TV OSs (e.g., Tizen, webOS, Roku, Android TV/Fire TV, or Vizio SmartCast).
• Fluency in JavaScript/TypeScript and one system language (C++, Rust, or Kotlin/Java/Go).
• Strong grasp of media frameworks (GStreamer, ExoPlayer, AVFoundation) and streaming protocols (HLS, DASH, CMAF).
• Experience integrating DRM, closed‑captioning, accessibility, and remote-control input models (D‑pad, voice, air‑mouse).
• Familiar with graphics & UI toolkits: Canvas/WebGL, LG webOS Enact, Samsung React‑TV‑Kit, Roku SceneGraph components.
• Comfort with device‑level constraints—CPU/GPU budgets, thermal limits, memory fragmentation—and profiling tools (Samsung Remote Test Lab, LG Developer Mode, Android GPU Inspector).
• Bachelor’s or higher in CS, EE, or related field (or equivalent practical experience).

Nice‑to‑Have

• Knowledge of ad decisioning & measurement stacks (Prebid CTV, SSAI, OM SDK, VAST 4.2, SCTE‑35).
• Experience with ACR or device analytics (Inscape, Nielsen DAR, Conviva).
• Exposure to Generative AI / ML inference on device (ONNX Runtime, TensorRT) for upscaling, personalization, or voice.
• Contributions to open‑source CTV frameworks or proposal authorship in W3C Web Media or CTA‑WAVE groups.
• Familiarity with continuous localization (i18n/L10n) and regulatory compliance (GDPR/CCPA, energy consumption).

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-04396:The annual salary range for this position is $143,000.00-$286,000.00 ‎ Bentonville, Arkansas US-10467:The annual salary range for this position is $110,000.00-$220,000.00 ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ Additional compensation includes annual or quarterly performance bonuses. ‎ Additional compensation for certain positions may also include: ‎ ‎ - Stock ‎ ‎ 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 and5 years’ experience in software engineering or related area. Option 2: 7 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 3 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... 840 W California Ave, Sunnyvale, CA 94086-4828, United States of America Apply tot his job Apply To this Job