Staff, Data Engineer

Position SummaryJoin our Walmart's Display Ad team of skilled engineers and help shape the performance optimization strategies of our cutting-edge systems. If you're a passionate and driven individual with a knack for uncovering system bottlenecks and fine-tuning performance, we encourage you to apply and be a part of our innovative journey.Position OverviewWe are seeking a talented and experienced Java Performance Engineer to join our team of skilled professionals. As a Performance Engineer, you will play a critical role in ensuring the optimal performance of our systems. The ideal candidate should possess a deep understanding of Java applications, have the ability to identify and resolve system issues and performance bottlenecks, and be comfortable working in complex distributed systems across multi-cloud environments.What You'll DoCollaborate closely with cross-functional teams including developers, architects, and operations to identify performance bottlenecks, system issues, and areas for optimization.Conduct thorough performance analysis of Java-based applications through profiling, monitoring, and benchmarking to identify performance degradation and suggest improvements.Deep dive into the codebase to understand the root causes of performance issues, including resource contention, memory leaks, and suboptimal algorithms.Develop and execute performance testing strategies to simulate real-world scenarios, stress-test system components, and uncover performance limitations.Design, implement, and execute performance experiments to evaluate the impact of code changes and system configurations.Work hands-on to fine-tune system parameters, configurations, and resource allocation to achieve optimal performance results.Collaborate with development teams to provide guidance and recommendations on code optimizations, caching strategies, and concurrency enhancements.Utilize performance monitoring and profiling tools to track and analyze system behavior, and proactively address potential bottlenecks.Collaborate on designing and implementing performance-related features that enhance the overall scalability and efficiency of the systems.Document performance analysis findings, optimization strategies, and best practices for future reference.Stay current with emerging technologies, industry trends, and best practices related to Java performance and distributed systems.What You'll BringBachelor's degree in computer science, Software Engineering, or a related field. Master's degree is a plus.Proven experience (8+ years) as a Performance Engineer, preferably with a focus on Java-based systems.Proficiency in Java programming language and deep knowledge of Java internals, memory management, and threading.Strong experience with performance profiling tools and techniques to identify bottlenecks in code and system components.Solid understanding of distributed systems architecture and design principles.Familiarity with multi-cloud environments and hands-on experience in optimizing applications for cloud deployment.Ability to analyze and interpret performance metrics to make informed decisions on system optimizations.Experience with performance testing frameworks and load generation tools.Familiarity with containerization technologies (e.g., Docker, Kubernetes) and their impact on application performance.Strong problem-solving skills with the ability to troubleshoot and debug complex systems.Excellent communication skills to collaborate effectively with cross-functional teams and present performance analysis findings.Ability to work independently and take ownership of performance-related tasks and projects.Certifications in performance engineering or relevant cloud platforms is a plus.Openness to learning new technologies and adapting to evolving challenges.About Walmart Global TechImagine working in an environment where one line of code can make life easier for hundreds of millions of people and put a smile on their face. That's what we do at Walmart Global Tech. We're a team of 15,000+ software engineers, data scientists and service professionals within Walmart, the world's largest retailer, delivering innovations that improve how our customers shop and empower our 2.3 million associates.Flexible, hybrid workWe use a hybrid way of working that is primarily virtual, while remaining near the locations Global Tech calls home. This approach helps us make quicker decisions, remove location barriers across our global team, be more flexible in our personal lives and spend less time commuting.BenefitsBeyond 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 EmployerWalmart, Inc. is an Equal Opportunity Employer - By Choice. We believe we are best equipped to help our associates, customers, and the communities we serve live better when we really know them.Minimum QualificationsOutlined 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 and 4 years' experience in software engineering or related field.Option 2: 6 years' experience in software engineering or related field.Option 3: Master's degree in Computer Science and 2 years' experience in software engineering or related field.Primary Location640 W California Avenue, Sunnyvale, CA 94086-4828, United States of America

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