USA) Senior, Software Engineer

Position Summary

Position Summary... What you'll do...About the team:
We are seeking a Senior Full Stack Software Engineer with strong experience in building high-scale distributed systems using Java, Rust, and NodeJS, along with modern Front-End development skills. In this role, you will contribute to evolving and operating the Marketplace API Gateway, which handles high-volume traffic from sellers and solution partners, and help design and build the new Marketplace GraphQL experience-centric api gateway (Apollo GQL Federation Framework).

You will also work on enhancing  to deliver intuitive, end-to-end developer experiences across our Marketplace API ecosystem and extend the MCP (Modal Context Protocol) gateway to enable agentic integrations within the Marketplace domain. The ideal candidate is comfortable working across backend services, federated GraphQL patterns, and developer-focused platform capabilities.
***** Immigration Sponsorship support will NOT be available for this position*****

• Design, build, and evolve high-scale distributed services that power the Marketplace API Gateway supporting critical seller and partner traffic.
• Lead the development of the mGQL (Marketplace GraphQL) gateway, including schema design, routing logic, federation strategy, and performance optimization.
• Extend and enhance the MCP (Modal Context Protocol) gateway to enable agentic workflows and context-aware integrations across Marketplace domain systems.
• Own the end-to-end lifecycle of backend services, from design and implementation through testing, deployment, monitoring, and ongoing reliability.
• Implement and drive best practices for resiliency, observability, rate limiting, quotas, latency reduction, SLAs, and fault isolation across gateway platforms.
• Build seamless, intuitive developer experiences through , including onboarding flows, documentation pipelines, SDK integrations, and developer tooling.
• Partner closely with product, content, and platform teams to ensure Marketplace APIs are discoverable, consistent, secure, and easy to integrate.
• Champion and drive improvements in API versioning, schema governance, security standards, and public integration patterns to elevate developer experience.
• Contribute to the architectural roadmap for agentic systems, supporting autonomous workflows, intelligent routing, and context-aware data flows.
• Influence platform-wide patterns, protocols, and standards to ensure long-term scalability, maintainability, and evolution.
• Develop performant UI surfaces and internal tools using modern front-end frameworks (React/Type Script preferred).
• Build and optimize Node.js, Java, or Rust-based services supporting developer platforms and orchestration layers.
• Integrate UI, API, and backend systems to deliver cohesive, experience-centric platform capabilities.

• Strong experience designing and operating large-scale distributed systems and API gateway platforms.
• Deep expertise in GraphQL, including schema design, federation, and performance optimization.
• Solid understanding of backend service design, reliability engineering, observability, and fault-tolerant architectures.
• Experience building developer platforms, public APIs, and tooling with a strong focus on developer experience (DX).
• Working knowledge of modern protocols, API contracts, and platform governance practices.
• Familiarity with agentic systems, autonomous workflows, or emerging middleware patterns is a plus.
• Proficiency in one or more backend languages such as Node.js, Java, or Rust.
• Hands-on experience with modern front-end frameworks (React/Type Script preferred).
• Ability to collaborate cross-functionally and influence architectural decisions across multiple teams.
• A developer-first mindset, with a passion for designing intuitive, scalable, and future-ready platforms.

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 experts and service professionals within the world's leading retailer who make an epic impact and are…