(USA) Senior, Software Engineer: Apollo GraphQL

Walmart • Sunnyvale, CA

84d • $117,000 - $234,000

About The Position

Join our team as a Senior Software Engineer and help shape the future of customer payments on Walmart.com! You'll 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 Walmart.com, 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.

Requirements

• 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 JavaScript, 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.

Nice To Haves

• 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.
• 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.

Responsibilities

• Design, develop, and maintain highly scalable microservices to support secure and efficient customer payments.
• Build and optimize APIs using Node.js, Apollo GraphQL, and JavaScript, 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.

Benefits

• 401(k) match
• Stock purchase plan
• Paid maternity and parental leave
• PTO
• Multiple health plans
• Incentive awards for performance
• Short-term and long-term disability
• Company discounts
• Military Leave Pay
• Adoption and surrogacy expense reimbursement
• Live Better U education benefit program

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Industry: General Merchandise Retailers
• Education Level: Bachelor's degree