Wal-Mart-posted 29 days ago
Full-time • Mid Level
Sunnyvale, CA
5,001-10,000 employees
General Merchandise Retailers

You'll be responsible for design, development and operations of large-scale data access/processing systems operating at terabyte/petabyte scale. As part of data access framework team, you will be focusing on data access best-patterns and best practice, as a form of library or service, to various data stores, e.g., Relational (MySQL/Oracle/PostGres/SQLServer), NewSQL (Spanner), NoSQL (CosmosDB, Cassandra, etc.), and Cache (Memcached, Redis), and Search Index (ElasticSearch, Solr) data stores. You'll interact with the engineers, product managers and architects to provide scalable, high-available, resilient, and robust technical solutions. @Walmart Global Tech is the technical powerhouse behind Walmart. We ensure our online e-commerce customers, third-party markets, internal supply chain and stores to access various data in a low-latency, high-available, resilient and scalable way. We manage and provide data access toolchains to large-scale distributed data stores to critical applications in production like Cart, Checkout, Payment, and Supply Chain. You'll be responsible for design, development and operations of large-scale data access/processing systems operating at terabyte/petabyte scale. As part of data access framework team, you will be focusing on data access best-patterns and best practice, as a form of library or service, to various data stores, e.g., Relational (MySQL/Oracle/PostGres/SQLServer), NewSQL (Spanner), NoSQL (CosmosDB, Cassandra, etc.), and Cache (Memcached, Redis), and Search Index (ElasticSearch, Solr) data stores. You'll interact with the engineers, product managers and architects to provide scalable, high-available, resilient, and robust technical solutions. 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.

  • Design, develop, and implement high-quality data access solutions to various data stores, focusing on scalability, latency, and fault-tolerance in every system built.
  • Use AI technology to automate workflows and improve overall productivity.
  • Own small-sized or medium-size projects from end-to-end and be able to lead 1-3 junior or senior engineers to accomplish project goals with high-quality.
  • Effectively troubleshoot application and production issues.
  • Bachelor's degree in computer science or related technical field with 8+ years of industrial experience or Master's degree and above with 6+ years of industrial experience.
  • 8+ years of object-oriented programming experience in Java, C++, C, or similar language.
  • 8+ years of experience in SQL and/or NoSQL data modeling.
  • 8+ years of experience of in both SQL and NoSQL data store technologies (e.g., MySQL/Oracle/Cassandra/Hadoop/Spark/CosmosDB/Spanner/PostGres/Memcached/Redis/Zookeeper/ElasticSearch/OpenSearch/Solr, etc.)
  • Deep knowledge on relational database server, JDBC client libraries, and object-relation-mapping (ORM) layer, particularly on MSSQL/AzureSQL and PostgreSQL.
  • Expert knowledge and experience on developing Search Indexes and client libraries, particularly on ElasticSearch/OpenSearch/Solr.
  • 8+ years of experience in systems design, algorithms, distributed systems, real-time systems, or real-time analytics.
  • 1+ years of experience and skills on developing AI Agentic tools to automate workflows and improve productivity.
  • 2+ Open-source software contributions/commits to projects sponsored by Apache Software Foundation (ASF) and Cloud Native Computing Foundation (CNCF).
  • Large scale distributed systems experience and knowledge, including scalability and fault tolerance.
  • Technical leadership experience on medium-sized projects with quality
  • Familiar with various design patterns in distributed systems, e.g., integrated caching, data change capture, global secondary index, etc.
  • Expert on building production-quality SDKs/drivers for accessing SQL/NoSQL datastores
  • Proficient on multi-threading concurrency programming and low-level system programming
  • Proficient on operations with VM-based Openstack and container-based Kubernetes systems.
  • Experience in database, data warehousing, and data processing workflow.
  • Exposure to cloud infrastructure, such as Open Stack, Azure, GCP, or AWS
  • A continuous drive to explore, improve, enhance, automate, and optimize systems and tools.
  • Strong computer science fundamentals in data structures and algorithms
  • Graduate degree in computer science or related field (MS or PhD)
  • Ability to operate effectively and independently in a dynamic, fluid environment
  • Excellent oral and written communication skills.
  • 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.
  • 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.
  • 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.
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