Senior Software Engineer

Walmart

Senior Full Stack Engineer building Walmart Marketplace API Gateway, GraphQL, and MCP platforms. Developing scalable backend services, developer tooling, and modern React/TypeScript interfaces.

Posted 8/5/2026full-timeSunnyvale • California • 🇺🇸 United StatesSenior💰 $117,000 - $234,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in designing and operating large-scale distributed systems and API gateway platforms, with a strong focus on GraphQL schema design, performance optimization, and developer experience. Proficient in backend languages such as Node.js, Java, or Rust, and capable of driving architectural decisions and cross-functional collaboration.

Highest-signal resume keywords

GraphQL Schema DesignLarge-Scale Distributed SystemsBackend Service DesignDeveloper Platform DevelopmentNode.js, Java, or Rust Proficiency

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

GraphQLAPI Gateway DevelopmentBackend Service DesignPerformance OptimizationReliability EngineeringObservabilityFault-Tolerant ArchitecturesDeveloper ExperienceModern ProtocolsAPI Contracts

Soft Skills

Cross-Functional CollaborationInfluencing Architectural Decisions

Tools & Technologies

Node.jsJavaRustReactTypeScript

Industry Keywords

Agentic SystemsAutonomous WorkflowsMiddleware PatternsAPI VersioningSchema Governance

Tech Stack

Tools & technologies

Distributed SystemsGraphQLJavaJavaScriptNode.jsReactRustTypeScript

About the role

Key responsibilities & impact

Design, build, and evolve high-scale distributed services powering the Marketplace API Gateway
Lead development of the Marketplace GraphQL gateway, including schema design, routing, federation, and performance optimization
Extend the MCP gateway to enable agentic workflows and context-aware integrations
Own backend service lifecycles from design and implementation through testing, deployment, monitoring, and reliability
Drive resiliency, observability, rate limiting, quotas, latency reduction, SLAs, and fault isolation
Build developer experiences on developer.walmart.com, including onboarding, documentation pipelines, SDK integrations, and developer tooling
Partner with product, content, and platform teams to improve API discoverability, consistency, security, and integration
Improve API versioning, schema governance, security standards, and public integration patterns
Contribute to the architectural roadmap for agentic systems and influence platform-wide standards
Develop performant UI surfaces and internal tools
Build and optimize Node.js, Java, or Rust services
Integrate UI, API, and backend systems for experience-centric platform capabilities

Requirements

What you’ll need

Bachelor's degree in computer science, computer engineering, computer information systems, software engineering, or related area and 3 years’ experience in software engineering or related area; or 5 years’ experience in software engineering or related area
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 focus on developer experience
Working knowledge of modern protocols, API contracts, and platform governance
Proficiency in one or more backend languages such as Node.js, Java, or Rust
Hands-on experience with modern front-end frameworks, with React/TypeScript preferred
Ability to collaborate cross-functionally and influence architectural decisions
Familiarity with agentic systems, autonomous workflows, or emerging middleware patterns is a plus
Immigration sponsorship support will not be available for this position

Benefits

Comp & perks

Incentive awards for performance
401(k) match
Stock purchase plan
Paid maternity and parental leave
PTO, including sick leave
Multiple health plans
Medical, vision, and dental coverage
Company-paid life insurance
Family care leave
Bereavement leave
Jury duty and voting leave
Short-term and long-term disability
Company discounts
Military Leave Pay
Adoption and surrogacy expense reimbursement
Paid education benefit through Live Better U, including tuition, books, and fees
Flexible, hybrid work