Education: Bachelor's degree or related field
Experience: 10+ years
Overview: We are seeking a Principal Software Engineer to lead the design and development of enterprise-scale Marketplace platforms supporting sellers, listings, pricing, orders, and real-time transactions. This role requires deep expertise in Java , distributed systems , event-driven architectures , Kafka , and Big Data ecosystems , with exposure to AI/ML-driven marketplace intelligence .
About Team: Building the right technology foundation for Infrastructure & platforms is vital to success at the scale of Walmart. Our team builds and maintains the foundational technologies that support the tech organization. Included in this are data platforms, enterprise architecture, DevOps, cloud computing, and infrastructure.
All of these products and services are supported by scalable and powerful infrastructure, ensuring a secure and seamless employee and customer experience across stores, digital channels, and distribution centers.
What you'll do: You will serve as a technical authority responsible for building high-throughput, low-latency systems that power marketplace growth at massive scale. Architect and build distributed marketplace services for seller onboarding, catalog, pricing, inventory, and order flows Design event-driven and streaming architectures using Apache Kafka for real-time marketplace signals Develop and optimize Java-based microservices using Spring / Spring Boot Build high-volume data pipelines using Big Data frameworks (Spark, Hadoop, Flink) for analytics and ML Enable AI/ML use cases such as fraud detection, pricing optimization, seller scoring, and recommendations Lead system design reviews , performance tuning, and scalability planning Define engineering standards for resiliency, observability, CI/CD, and operational excellence Mentor senior engineers and influence platform-wide architectural decisions Partner with product, data science, infrastructure, and security teams
Required Qualifications 10+ years of software engineering experience in large-scale systems Expert proficiency in Java with strong knowledge of concurrency and multithreading Deep experience building distributed, highly available systems Hands-on experience with Apache Kafka (topics, partitions, offsets, schema evolution, exactly-once semantics) Experience with Big Data technologies : Spark (batch & structured streaming) Hadoop ecosystem (HDFS, Hive, YARN) Flink or equivalent stream-processing engines Strong experience with microservices , REST/gRPC APIs Proficiency with SQL and NoSQL databases (MySQL, PostgreSQL, Cassandra, MongoDB, etc.) Strong system design, troubleshooting, and performance-optimization skills
Preferred Qualifications Marketplace, e-commerce, payments, or supply-chain platform experience Cloud-native development on AWS, GCP, or Azure Experience with Kubernetes, Docker , and service mesh Experience handling millions of sellers, SKUs, and transactions Familiarity with ML platforms , feature stores, or real-time inference Experience with observability tools (Prometheus, Grafana, ELK, OpenTelemetry) Strong understanding of security, data governance, and compliance
What Success Looks Like Platforms process millions of marketplace events per minute Systems are fault-tolerant, scalable, and operationally mature Marketplace data enables real-time insights and AI-driven decisions Engineering standards align with enterprise-scale best practices
About Walmart Global Tech Imagine working in an environment where one line of code can make life easier for hundreds of millions of people. That’s what we do at Walmart Global Tech. We’re a team of software engineers, data scientists, cybersecurity expert's and service professionals within the world’s leading retailer who make an epic impact and are at the forefront of the next retail disruption.
People are why we innovate, and people power our innovations. We are people-led and tech-empowered. We train our team in the skillsets of the future and bring in experts like you to help us grow.
We have roles for those chasing their first opportunity as well as those looking for the opportunity that will define their career. Here, you can kickstart a great career in tech, gain new skills and experience for virtually every industry, or leverage your expertise to innovate at scale, impact millions and reimagine the future of retail.
Walmart’s culture is a competitive advantage, and it’s fostered by being together. Working together in person allows us to collaborate, align quickly and innovate with greater speed. We use our campuses to create purposeful connection rooted in deepening understanding and investing in the development of our associates.
Our hubs: Walmart is a global company with offices across the United States and around the world. Our global headquarters is in Bentonville, Arkansas, with primary hubs in the San Francisco Bay area and New York/New Jersey.
Benefits: Beyond our great compensation package, you can receive incentive awards for your performance. Other great perks include 401(k) match, stock purchase plan, paid maternity and parental leave, PTO, multiple health plans, and much more.
Equal Opportunity Employer: Walmart, Inc. is an Equal Opportunity Employer
The above information has been designed to indicate the general nature and level of work performed in the role. It is not designed to contain or be interpreted as a comprehensive inventory of all responsibilities and qualifications required of employees assigned to this job. The full Job Description can be made available as part of the hiring process.
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 :
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.
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.
640 W California Avenue, Sunnyvale, CA 94086-4828, United States of America
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