Principal, Software Engineer - Fullstack
About The Position
As a Principal Engineer - Fullstack, you will act as a hands-on technical leader and architect for the Marketplace Orders and Returns platform. The role calls for deep technical expertise and strong engineering judgment, with a focus on platform engineering to build scalable, resilient, and extensible systems across backend and frontend layers. You will drive architectural excellence, evaluate and adopt modern technologies, and solve complex problems in a distributed, high-scale environment while leading through influence across teams. The Marketplace Engineering team builds core platforms and services that help Walmart offer broad selection at competitive prices and a strong customer experience. It enables third-party sellers to join the marketplace, sell and manage products on walmart.com, and supports the seller lifecycle, customer-experience monitoring, and seller insights for assortment, pricing, and inventory planning. The team collaborates with partner platform teams to improve experiences for sellers and customers.
Requirements
- Bachelor's degree in computer science, computer engineering, computer information systems, software engineering, or a related area and 5 years of experience in software engineering or a related area; or 7 years of experience in software engineering or a 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 Java and familiarity with modern web frameworks such as 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.
- Strong problem-solving skills and ability to navigate complex, ambiguous challenges.
- Track record of mentoring senior engineers and raising the overall technical bar.
- Excellent collaboration and communication skills across engineering and business stakeholders.
Nice To Haves
- Master’s degree in computer science, computer engineering, computer information systems, software engineering, or a related area and 3 years of experience in software engineering or a related area.
- Knowledge of implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards, assistive technologies, and digital accessibility best practices.
Responsibilities
- 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 for Marketplace workflows.
- Lead end-to-end architecture across backend services and modern web front-end technologies, including React/Redux.
- Lead platform engineering initiatives to improve developer productivity, scalability, and reusability across teams.
- Use data and AI-driven insights to enhance system intelligence, decision-making, and customer and seller experiences.
- Stay current with emerging technologies and apply modern engineering and platform practices to evolve the ecosystem.
- Lead cross-team architectural decisions to ensure scalability, reliability, and performance.
- Solve 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.
- Contribute hands-on to critical systems and architectural initiatives.
Benefits
- Medical, vision, and dental coverage.
- 401(k), stock purchase, and company-paid life insurance.
- Paid time off, including sick leave, parental leave, family care leave, bereavement, jury duty, and voting leave.
- Short-term and long-term disability.
- Company discounts.
- Military Leave Pay.
- Adoption and surrogacy expense reimbursement.
- Walmart-paid education benefit program, Live Better U, for eligible full-time and part-time associates.
- Performance-based bonuses.
- Stock may be included as additional compensation for certain positions.
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What This Job Offers
Job Type
Full-time
Career Level
Principal
