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Walmart

Principal Software Engineer – Fullstack

Walmart

. Act as a hands-on technical leader and architect for the Marketplace Orders and Returns platform .

Posted 11/3/2026full-timeSunnyvale • California • United StatesLead💰 $143,000 - $286,000 per yearWebsite

Core Competencies

Role fit
Core Competencies

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

Demonstrates expertise in designing and scaling event-driven, microservices-based platforms, with a strong focus on backend technologies such as Java and modern web frameworks like React/Redux. Proven ability to lead architectural decisions, mentor engineers, and leverage data-driven insights to enhance system performance and user experiences.

Highest-signal resume keywords
Distributed Systems ExpertiseMicroservices ArchitectureCloud-Native Platform DevelopmentAPI Design and IntegrationTechnical Leadership and Mentorship

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
JavaMicroservicesEvent-Driven ArchitectureAPI DesignCloud-Native DevelopmentReactReduxPlatform EngineeringData-Driven InsightsSystem Scalability
Soft Skills
CollaborationCommunicationMentorshipInfluencing Technical DecisionsProblem Solving
Certifications & Qualifications
Bachelor's Degree in Computer Science
Industry Keywords
Marketplace SystemsSoftware EngineeringSystem ReliabilityPerformance OptimizationContinuous Improvement

Tech Stack

Tools & technologies
CloudDistributed SystemsJavaMicroservicesReactRedux

About the role

Key responsibilities & impact
  • Act as a hands-on technical leader and architect for the Marketplace Orders and Returns platform
  • Drive the technical vision and architecture for Marketplace Orders and Returns systems
  • Design and scale event-driven, microservices-based platforms, including APIs, webhooks, app integrations, and web front-end applications
  • Lead end-to-end architecture across backend services and modern web front-end (React/Redux)
  • Lead platform engineering initiatives to improve developer productivity, system scalability, and reusability
  • Leverage data and AI-driven insights to enhance system intelligence, decision-making, and customer/seller experiences
  • Evaluate and adopt emerging technologies and modern engineering practices
  • Lead cross-team architectural decisions for scalability, reliability, and performance
  • Solve complex distributed-systems challenges involving data consistency, resiliency, and latency
  • Partner with Product and Engineering leaders to translate business needs into scalable technical solutions
  • Influence and align teams across Marketplace, Payments, Fulfillment, and Seller Platform
  • Lead design reviews and establish engineering best practices for APIs, integrations, and front-end applications
  • Drive platform modernization and continuous improvement initiatives
  • Mentor senior engineers and raise the technical bar across the organization
  • Make hands-on technical contributions to critical systems and architectural initiatives

Requirements

What you’ll need
  • Bachelor's degree in computer science, computer engineering, computer information systems, software engineering, or related area and 5 years’ experience in software engineering or related area; OR 7 years’ experience in software engineering or related area
  • Deep expertise in distributed systems, microservices, and event-driven architectures
  • Strong experience building and scaling cloud-native platforms with high availability and performance
  • Proficiency in backend technologies (Java)
  • Familiarity with modern web frameworks (React/Redux)
  • Experience designing and evolving APIs, webhooks, and external integrations at scale
  • Strong foundation in platform engineering and building reusable, extensible systems
  • Proven ability to drive architecture across teams and influence technical decisions at scale
  • Experience leveraging data and AI-driven insights to improve systems and user experiences
  • Track record of mentoring senior engineers and raising the overall technical bar
  • Excellent collaboration and communication skills across engineering and business stakeholders

Benefits

Comp & perks
  • Performance-based bonus awards
  • Medical, vision, and dental coverage
  • 401(k)
  • Stock purchase
  • Company-paid life insurance
  • Paid time off, including sick leave
  • Parental leave
  • Family care leave
  • Bereavement leave
  • Jury duty leave
  • Voting leave
  • Short-term and long-term disability
  • Company discounts
  • Military Leave Pay
  • Adoption and surrogacy expense reimbursement
  • PTO and/or PPTO for vacation, sick leave, holidays, or other purposes
  • Live Better U Walmart-paid education benefit
  • Paid tuition, books, and fees for eligible education programs
  • Annual or quarterly performance bonuses
  • Stock may be included for certain positions