Systems and Infrastructure Engineer III, Information Security-Web Security

Systems And Infrastructure Engineer III, Information Security-Web Security

Multiple locations Regular/ Permanent Salaried

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.

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. At Walmart, we prioritize innovation and data security. Our team is dedicated to maintaining a secure operating environment and preserving the trust of our customers, associates, and stakeholders. We combine a range of services and expertise to prevent fraud, detect threats, and manage digital risk and access. Our focus is on mitigating attack risks, securing cloud transformation, and fostering a culture of security and reliability within our team.

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, 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 with a solid foundation in key security domains: access control, application security, network security, and architecture
• Knowledge of network and security tools and protocols, including Firewalls and DNS
• Strong analytical, problem-solving, and interpersonal communication skills
• A collaborative spirit with a proactive and self-driven attitude

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.