Position Summary...
What you'll do...
Role 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.
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
What you'll bring:
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
Benefits:
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.
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...
640 W California Avenue, Sunnyvale, CA 94086-4828, United States of America
