Senior, Software Engineer: Apollo GraphQL

Position Summary

Join our team as a Senior Software Engineer and help shape the future of customer payments on ! You will design and build scalable microservices and APIs that power seamless, secure, and high-impact transactions for millions of shoppers worldwide. This is your chance to work on mission‑critical systems at massive scale, driving innovation in digital payments.

Our team works closely with our US stores and eCommerce business to better serve customers by empowering team members, stores, and merchants with technological innovation. From groceries and entertainment to sporting goods and crafts, Walmart U.S. offers an extensive selection that our customers value, whether they shop online at , through one of our mobile apps, or in‑store. Focus areas include customers, stores and employees, in‑store service, merchant tools, merchant data science, and search and personalization.

• Design, develop, and maintain highly scalable microservices to support secure and efficient customer payments.

• Build and optimize APIs using Node.js, Apollo Graph
  
  QL, and Java Script , ensuring high performance, security, and reliability.

• Collaborate with cross‑functional teams (product, design, and backend services) to define, design, and deliver new payment features.

• Diagnose, debug, and resolve complex technical issues efficiently to ensure a smooth payment experience for millions of customers.

• Contribute to system architecture and best practices
  , driving technical excellence and scalability in payment infrastructure.

• 5+ years of experience in software engineering, with a strong focus on scalable microservices and API development.

• 3+ years of hands‑on experience with GraphQL
  , including schema design, resolvers, query optimization, and best practices for performance and security.

• Proficiency in Node.js and Java Script , with experience in backend development, API design, and distributed systems.

• Strong problem‑solving skills and system design experience
  , with the ability to build solutions that handle high‑traffic payments at scale.

• A collaborative mindset
  , working effectively with cross‑functional teams to deliver high‑impact features in a fast‑paced environment.

Benefits include a competitive compensation package, incentive awards, 401(k) match, stock purchase plan, paid maternity and parental leave, PTO, multiple health plans, and other perks.

Walmart, 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. That means understanding, respecting, and valuing the unique styles, experiences, identities, values, and ideas while being welcoming of all people.

• Option 1:
  Bachelor's degree in computer science, computer engineering, computer information systems, software engineering, or related area and 4 years’ experience in software engineering or related area.
  Option 2: 6 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 2 years' experience in software engineering or related area. We value candidates with a background in creating inclusive digital experiences, demonstrating knowledge in implementing 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.

840 W California Ave, Sunnyvale, CA , United States of America