(USA) Systems and Infrastructure Engineer III, Information Security

Position Summary...This role is responsible for strengthening the security of all web ingress points across global eCommerce platforms. It focuses on developing and tuning WAF policies, enhancing client‑side detection and fingerprinting, managing defenses during active cyber‑attacks, and controlling scripted traffic. The position also collaborates closely with network and site reliability teams while building and operating the infrastructure that supports the organization’s overall web security posture.

About the team:

The Edge Ingress Security team plays a critical role in protecting our global eCommerce platforms from a wide range of online threats. From defending against web-based and DDoS attacks to managing unwanted scripted traffic and fraud, we are the gatekeepers of secure digital access. We collaborate closely with network, infrastructure, and product teams to ensure that every ingress flow—across all web properties—is secure, resilient, and adaptive to evolving threats. Our team thrives on solving complex security challenges in a fast-paced, high-impact environment.

What you'll do...

• Create, tune, and enforce Web Application Firewall (WAF) policies across global eCommerce sites
• Continuously evaluate and adapt ingress security policies based on the evolving threat landscape
• Mature our client-side evaluation and fingerprinting capabilities
• Assess and manage protection strategies during active cyber-attacks
• Control and monitor scripted traffic across all digital properties
• Collaborate with network and site reliability teams to secure all ingress points
• Build, deploy, and manage security infrastructure and operations to support overall web security

What you'll bring:

• Hands-on experience with Web Application Firewall (WAF) management and DDoS mitigation strategies
• Strong knowledge of network and web protocols such as TCP/IP, IPSec, HTTPS, and SSL
• Deep understanding of how web properties and Content Delivery Networks (CDNs) function
• Experience with client-side fingerprinting and behavioral data collection
• Proficiency with log management tools such as Splunk, Kibana, or ArcSight
• Strong scripting skills in at least one language
• Familiarity with cloud platforms including Azure and GCP

Bonus points for:

• A security-first mindset and solid foundation in key security domains: application security, network security, architecture
• Knowledge of network and security tools and protocols, including Firewalls and DNS
• Strong analytical, problem-solving, and interpersonal communication skills

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-11656: The annual salary range for this position is $117,000.00 - $234,000.00

Herndon, Virginia US-10710: 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 computer science, information technology, engineering, information systems, cybersecurity, or related area and 2years’ experience in systems and infrastructure engineering or related area at a technology, retail, or data-driven company.

Option 2: 4 years’ experience in systems and infrastructure engineering or related area at a technology, retail, or data-driven company.

Preferred Qualifications...

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

Certification in Security+, GISF, CISSP, CCSP, or GSEC, Master’s degree in Computer Science, Information Technology, Engineering, Information Systems, Cybersecurity, 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...

1375 Crossman Ave, Sunnyvale, CA 94089-1114, 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.