Systems and Infrastructure Engineer III, Information Security

Position Summary

The Systems and Infrastructure Engineer III, Information Security, plays a critical role in designing, implementing, and maintaining secure and scalable infrastructure solutions. This position involves developing modular system architectures, automating workflows, and ensuring compliance with security standards and risk management frameworks. The role requires expertise in infrastructure maintenance, capacity planning, and configuration management to support business objectives effectively. The engineer collaborates across teams to deliver robust, high-quality solutions while adhering to coding and security policies, contributing to continuous improvement and operational excellence within the information security domain.

The Information Security team protects customer data by implementing advanced security measures across a leading e-commerce platform. This team tackles complex cybersecurity challenges through technical expertise and innovation. The Cryptography group modernizes cryptographic operations to enhance security agility m members collaborate to design, implement, and maintain resilient security solutions, leveraging skills in infrastructure security, automation, and software engineering. Their work is vital in maintaining trust and safety within Walmart’s digital ecosystem, ensuring a secure and reliable shopping experience for customers worldwide.

• Help shape and execute standards, reference architectures, and best practices for cryptography, PKI, and key management across the enterprise
• Drive modernization of certificate lifecycle management by building internal tools, advancing automation, and delivering analytics that improve visibility, reliability, and operational efficiency
• Partner closely with platform, infrastructure, and application teams to solve complex pain points and deliver scalable tooling solutions
• Apply broad technical depth to deliver well-documented, production-ready changes that minimize operational risk and improve service resilience
• Influence Information Security stakeholders by communicating standards, guidance, and best practices that raise the bar for secure and reliable platform operations

• 3–5 years of software engineering experience, including SRE, platform engineering, or infrastructure-focused role
• Experience with certificate lifecycle management, CLM platforms, PKI, and TLS certificate troubleshooting
• Strong systems thinking, with a deep understanding of infrastructure architecture, distributed workflows, and building resilient, automated platforms at enterprise scale
• A systems‑first mindset, with the ability to think in terms of infrastructure boundaries, data flows, and platform capabilities beyond application logic alone
• Proficiency in Java, Python or Go
• Familiarity with observability concepts, including metrics, logs, and traces
• Experience with cloud platforms such as GCP or Azure, and containerized environments
• Strong understanding of Cryptographic protocols (like TLS, SSH), algorithms and their implementations

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  . 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…