Principal Software Engineer - Experimentation Platform

Position Summary...

Help drive a culture of experimentation and data-driven decision-making at Walmart scale to
continuously evolve and improve the customer experience.

We are seeking a technical lead software engineer to design and advance the core infrastructure
powering Walmart's self-serve experimentation platform. This position sits on the Walmart
Experimentation Platform team, where our mission is to deliver a first-in-class, reliable, and scalable
experimentation experience across all of Walmart's digital surfaces. You will shape the platform's multiyear technical strategy, drive cross-org alignment, and ensure the architecture can support Walmart's
evolving experimentation needs.

What you'll do...

• Drive the technical direction for Walmart’s experimentation backend services, aligning long-term platform strategy with business needs across multiple organizations
• Design, develop, and scale efficient and reliable systems and pipelines to support teams globally throughout Walmart
• Provide deep technical mentorship and elevate engineering culture across a high-performing, agile engineering team
• Closely partner with data scientists, product managers, and engineering leaders to advance experimentation methodologies and ensure platform adoption and success

 
What you'll bring:

• Proven technical leadership of a team of engineers
• Experience designing, developing, testing, and maintaining large-scale systems
• Expertise in one or more: Java, Scala, Lua, Rust
• Maintaining and deploying compute environments across local and cloud-based systems
• Ability to proactively manage projects across multiple teams and troubleshoot issues
• Proven ability to influence technical decisions across multiple teams or organizations
• Strong strategic thinking—ability to connect engineering decisions to long-term business outcomes
• Exceptional communication skills, enabling clear articulation of complex technical approaches to senior leadership and cross-functional audiences
• Ability to identify emerging technologies and guide their adoption
• Expertise in reliability engineering, observability, platform governance, and operational excellence for mission-critical systems

Preferred Qualifications:

• Experience working with Experimentation (A/B Testing)
• Experience working with Feature Flags and risk-mitigated deployments
• Experience building data solutions and AI/ML products
• Strong contributions to open-source frameworks, standards, or libraries

Responsibilities:

• Lead and participate in medium- to large-scale projects by reviewing requirements; translating requirements into technical solutions; designing solutions (design docs, wireframes, implementation plans); writing and developing code; testing; collaborating with cross-functional teams; troubleshooting open issues and bug fixes; and ensuring on-time delivery.
• Troubleshoot business and production issues by gathering information (issue, impact, criticality, root cause); engaging support teams to assist in the resolution of issues; formulating an action plan; and performing actions as designated in the plan.
• Provide and support the implementation of business solutions through partnerships with stakeholders, identifying needs, managing processes, and adapting to evolving demands.
• Define the technical roadmap for experimentation platform services, aligning architecture decisions with multi-quarter business priorities.
• Lead the design of platform-level systems, authoring architecture proposals, conducting design reviews, and setting technical direction across services.
• Drive cross-org initiatives, collaborating with analytics, platform, and product teams to deliver unified experimentation capabilities.
• Ensure operational excellence for experimentation backend services, joining and driving incident mitigation efforts and root cause analysis.
• Mentor Staff Engineers and Senior Engineers, enabling them to independently lead large-scale initiatives.
• Lead evaluations and integration of emerging technologies, guiding proof-of-concepts and adoption strategies.
• Uphold and advance engineering excellence, including code quality, automation, observability, and security best practices.

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.
Bentonville, Arkansas US-30095: The annual salary range for this position is $110,000.00 - $220,000.00
Sunnyvale, California US-11657: 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...

2403 Se J St, Bentonville, AR 72716, 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.