(USA) Principal, Software Engineer

Position Summary...

What you'll do...Role summary:
As a Principal Engineer in Walmart’s Fraud and Risk platform, you will define and drive the architecture of next-generation fraud and risk prevention systems at massive scale. You will lead the design of platforms that combine real-time decisioning, entity intelligence, agentic AI, and human-in-the-loop workflows. This role requires deep technical leadership, owning architecture across systems and enabling teams to build scalable, intelligent, and explainable fraud prevention platforms. Your expertise will ensure high availability, reliability, and innovation while fostering continuous improvement and operational excellence within a dynamic engineering environment.
About the team:
The Inkiru team is dedicated to detecting and preventing fraud in real time, ensuring a secure shopping experience both online and in stores. Comprising skilled engineers, data scientists, and product managers, the team collaborates to develop advanced platforms capable of processing large-scale data swiftly. As part of this team, engineers contribute to building systems that deliver rapid insights for fraud detection. Working closely with cross-functional partners, they design and implement platform services, applications, and analytics tools that support predictive intelligence and enhance operational effectiveness across Walmart’s ecosystem.
What you'll do:
Define Architecture for Fraud & Risk Platforms

• Lead system design for real-time fraud detection and policy enforcement
• Architect entity resolution and graph intelligence systems
• Design agentic AI platforms for automated fraud analysis and reasoning
• Shape case management and orchestration systems for investigations

Drive AI-Native System Design

• Define patterns for integrating ML models and AI agents into production
• Lead development of explainability frameworks for fraud decisions
• Enable scalable systems for model deployment, evaluation, and iteration

Own Cross-System Strategy

• Align architecture across Gateway, Platform, and Data Science teams
• Define integration patterns for real-time and batch systems
• Ensure systems meet requirements for latency, reliability, and scalability

What you'll bring:
Proven track record of architecting and scaling large distributed systems

• Deep expertise in system design, platform engineering, and microservices architecture
• Strong experience with real-time decision systems and high-throughput architectures
• Experience architecting systems that operationalize ML models at scale
• Strong understanding of ML-driven decisioning systems and tradeoffs (rules vs models)
• Familiarity with fraud/risk systems, identity systems, or trust & safety domains
• Experience with entity resolution, graph systems, or behavioral analytics (strong plus)
• Ability to drive alignment and influence across organizations
• Strong technical judgment with a focus on long-term scalability and maintainability

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 5 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...

1375 Crossman Ave, Sunnyvale, CA 94089-1114, United States of AmericaWalmart 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.