Senior Full-Stack Engineer, GraphQL & API Gateway

Walmart Global Tech; Sunnyvale (CA); Hybrid; USD 117,000 - 234,000; Full time

Benefits offered by this job

401(k) match

Stock purchase plan

Paid maternity and parental leave

PTO

Job summary

Walmart Global Tech in Sunnyvale, CA, is seeking a Senior Full Stack Software Engineer to design and operate high-scale distributed systems, focusing on the Marketplace API Gateway and GraphQL experiences. You will collaborate across backend services and frontend development, using Node.js, Java, and Rust, plus React/TypeScript for UI, and own end-to-end delivery.

This hybrid role offers a collaborative, developer-focused environment with opportunities to shape platform capabilities and DX for

Qualifications

• Experience designing and operating large-scale distributed systems and API gateway platforms.
• Expertise in GraphQL, including federation and performance.
• Backend reliability, observability, and fault-tolerant architectures.
• Experience building developer platforms and public APIs.
• Familiarity with agentic systems or middleware patterns is a plus.
• Proficiency in Node.js, Java, or Rust.
• Frontend experience with React/TypeScript.

Responsibilities

• Design, build, and evolve high-scale distributed services powering the Marketplace API Gateway.
• Lead development of the mGQL gateway including schema design and federation strategy.
• Extend the MCP gateway to enable agentic workflows across Marketplace systems.
• Own end-to-end lifecycle of backend services from design to deployment and monitoring.
• Implement resiliency, observability, rate limiting, quotas, and latency reduction across gateway platforms.
• Build intuitive developer experiences through developer.walmart.com and SDK tooling.
• Collaborate with product, content, and platform teams to ensure discoverable, secure APIs.
• Champion API versioning, schema governance, and public integration patterns.

Skills

Distributed systems

GraphQL

APIs

Node.js

Java

Rust

React

TypeScript

DX (developer experience)

Cross-team collaboration

Education

Bachelor's degree in computer science, computer engineering, computer information systems, software engineering, or related area

Tools

Apollo Federation

GraphQL

React

TypeScript

Job description

Walmart Global Tech in Sunnyvale, CA, is seeking a Senior Full Stack Software Engineer to design and operate high-scale distributed systems, focusing on the Marketplace API Gateway and GraphQL experiences. You will collaborate across backend services and frontend development, using Node.js, Java, and Rust, plus React/TypeScript for UI, and own end-to-end delivery.

This hybrid role offers a collaborative, developer-focused environment with opportunities to shape platform capabilities and DX for