Senior, Software Engineer (Fullstack, Backend Heavy)

Position Summary...

What you'll do...Senior Software Engineer – ModFlex, Locations & Digital Shelf Labels Walmart Global Tech | Store Systems & Infrastructure

About the Team The ModFlex, Locations & Digital Shelf Labels team builds and maintains the core systems that power real-time store operations at Walmart scale. We are the Single Source of Truth (SSOT) for merchandise locations — managing over 600 million merchandise location records across thousands of Walmart stores. As Digital Shelf Labels (DSL) expands to Sam’s Club and beyond, we’re scaling to support a comparable footprint of electronically labeled items across the entire chain. Our platforms are mission-critical — downstream consumers depend on our systems at peak throughputs exceeding 10,000 transactions per second, making reliability, consistency, and performance non-negotiable. We operate at the intersection of physical retail and distributed systems engineering, where every architectural decision has real consequences on store shelves worldwide.

What You’ll Do As a Senior Software Engineer, you’ll own the design and delivery of scalable backend services and data pipelines that power store operations, merchandise location management, and electronic shelf label infrastructure at this scale. You’ll also contribute to the React Native mobile surfaces that associates use on the floor every day.

Backend Engineering (Primary Focus ~70%)

• Design and build high-throughput, event-driven microservices using Java and Spring Boot that serve as the backbone for the SSOT of merchandise locations — a dataset of 600M+ records growing with every new DSL rollout
• Architect and maintain Kafka-based event streaming pipelines handling item location changes, replenishment updates, and ESL tag events at >10K TPS peaks across thousands of stores
• Own the full data lifecycle — from schema design and migrations (MySQL) to JPA/Hibernate access patterns through shared data access layers — optimized for read/write performance at massive scale
• Build resilient service integrations using Resilience4j (circuit breakers, retry policies, rate limiting) ensuring downstream consumers — operating at peak TPS — experience consistent, low-latency responses
• Implement and maintain multi-module Maven builds across a 12+ module microservice architecture
• Write production-ready code with strong observability — structured logging to OpenObserve/Splunk, meaningful metrics, and alerting that matters at scale
• Contribute to CI/CD pipelines via Looper (Jenkins) for automated build, test, and deployment workflows
• Deploy and operate services on Kubernetes (KITT), understanding pod lifecycle, scaling strategies, and deployment configurations for high-availability systems

Frontend Engineering (Secondary Focus ~30%)

• Build and maintain features in the mod-flex React Native mini-app running inside the Me@Walmart (Allspark) container
• Work with TypeScript, Redux, and React Navigation to deliver associate-facing experiences that surface real-time location and DSL data
• Consume REST APIs from backend services with proper error handling and state management
• Maintain 95%+ Jest test coverage standards for all frontend contributions
• Collaborate with designers and product managers to ship intuitive, performant mobile experiences

What You’ll Create With

• Backend: Java, Spring Boot, Maven, Kafka (Avro), MySQL, Spring Data JPA, Resilience4j
• Frontend: TypeScript, React Native, Expo, Redux, Jest
• Infrastructure: Kubernetes (KITT), Looper/Jenkins, Vault, Walmart Service Mesh
• Observability: OpenObserve, Splunk, Prometheus
• Configuration: CCM (allspark-config), Spring Boot YAML configs

What We’re Looking For

• Bachelor’s degree in Computer Science, Engineering, or equivalent practical experience
• 4+ years of software engineering experience with a strong backend focus
• Strong proficiency in Java and Spring Boot — you’ve built and shipped production microservices
• Hands-on experience with Kafka or similar event streaming platforms — ideally at high-throughput, production scale
• Solid understanding of relational databases (MySQL or equivalent) — schema design, query optimization, and ORM patterns tuned for large datasets
• Demonstrated ability to design systems with high availability and performance in mind — you think about consistency, latency, and failure modes
• Experience with REST API design — building and consuming APIs across service boundaries at scale
• Familiarity with Kubernetes and containerized service deployments
• Experience with CI/CD pipelines (Jenkins, Looper, or equivalent)
• Working knowledge of frontend development — React, React Native, or TypeScript experience is a plus
• Strong debugging and observability skills — comfortable querying logs and tracing issues in production
• Comfortable in a distributed team environment with asynchronous communication

Nice to Have

• Experience with the Allspark / Me@Walmart mini-app framework
• Familiarity with Avro schema serialization for Kafka topics
• Knowledge of Resilience4j patterns — circuit breakers, retry, rate limiting
• Experience with Azure Cosmos DB or similar NoSQL data stores
• Python experience (ML/computer vision adjacent work)

Why This Team You won’t be working on toy problems. Our systems manage the SSOT for 600M+ merchandise locations — and with DSL rolling out chain-wide, that scale is only growing. Downstream teams across the enterprise depend on us at >10K TPS peaks, which means the work you ship has real, immediate consequences at one of the world’s largest retailers. We move fast, document well, and invest in engineering quality that holds up at scale.

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-09050: The annual salary range for this position is $90,000.00 - $180,000.00

Sunnyvale, California US-04396: The annual salary range for this position is $117,000.00 - $234,000.00 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 3 years’ experience in software engineering or related area.

Option 2: 5 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 1 year's 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...

805 Se Moberly Ln, Bentonville, AR 72712, 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.