(USA) Principal, Software Engineer

Walmart•Sunnyvale, CA

6h•Onsite

About The Position

As a Principal Software Engineer on the Marketplace Platform team, you will play a pivotal role in driving the architecture, design and maintenance of advanced frameworks that elevate Walmart's Marketplace capabilities, ensuring unparalleled experiences for both sellers and channel partners. Your responsibilities will encompass designing, coding, debugging, optimizing, and monitoring application health to ensure robust performance. In addition to these technical duties, you will provide mentorship to junior engineers, fostering their professional growth, and actively collaborate with product and UX/UI teams to deliver seamless integrations. You will oversee the management of the Walmart Marketplace Platform for experience and API, empowering third-party sellers to utilize services from Solution Partners effectively. This expanding business sector offers substantial opportunities for technological innovation and professional advancement within a dynamic, collaborative, and inclusive environment. Your leadership and expertise will be instrumental in shaping the future of Walmart's Marketplace. Join the innovative Walmart Marketplace Platform team, where creativity and technological innovation drive success. We specialize in enhancing Seller and Channel Partner Portal experiences and managing our advanced Marketplace API gateway. Our tech stack includes Java for backend services and ReactJS for frontend development, providing an exciting opportunity for growth and collaboration.

Requirements

Option 1: 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.
Option 2: 7 years’ experience in software engineering or related area.
Software Development
Software Architecture
Solution Design
Continuous Integration

Nice To Haves

Master’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.
Creating inclusive digital experiences, demonstrating knowledge in implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards, assistive technologies, and integrating digital accessibility seamlessly.
Knowledge of accessibility best practices and join us as we continue to create accessible products and services following Walmart’s accessibility standards and guidelines for supporting an inclusive culture.

Responsibilities

Delivers platform capabilities across a technical area or sub-organization, including shared infrastructure, reusable tooling, and scalable ML frameworks (for example, CI/CD pipelines, SDKs, model runtimes, feature stores).
Aligns engineering efforts with roadmap milestones and domain strategies, ensuring execution supports long-term platform evolution.
Applies cloud-native architecture principles and best practices in distributed system design to enable high availability, scalability, and fault tolerance.
Drives the full software development lifecycle across multiple teams—including coding, testing, CI/CD deployment, observability, monitoring, incident response, and maintenance.
Implements distributed architectures optimized for real-time data processing, AI/ML integration, and cross-service reliability.
Maintains architectural decision records (ADRs) to ensure traceability, alignment, and transparency in technical planning and tradeoffs.
Architects and builds intelligent software systems and AI-enhanced applications that serve millions of customers and associates.
Leads the integration of AI agents capable of multi-step reasoning and tool-augmented tasks using technologies such as Python, Java, JavaScript, Dart, Rust, and C++.
Applies model-driven design and leverage tools like GitHub Copilot to increase development velocity and quality.
Provides strategic technical guidance and mentorship to Engineers and their teams, fostering engineering excellence and innovation.
Influences architectural decisions and design patterns across teams to promote standardization, maintainability, and system interoperability.
Showcases Walmart’s engineering vision through knowledge sharing, community leadership, and by publishing technical articles and insights internally and externally.
Engages with cross-functional stakeholders to deeply understand business and user needs.
Breaks down ambiguous problems into actionable technical requirements and defines clear operational, engineering, and customer-centric metrics to measure success and value delivery.
Demonstrates responsibility for deliverables, ensuring solutions meet quality standards and business objectives.
Takes initiative to resolve issues and drive projects to completion.
Applies sound reasoning to make informed technical decisions, balancing trade-offs and considering long-term impacts on system architecture and business goals.
Adapts quickly to change, embraces new technologies, and understands the broader system context.
Anticipates the downstream effects of technical choices and integrates feedback to improve outcomes.
Works effectively across teams, openly shares knowledge, and communicates complex ideas clearly to both technical and non-technical stakeholders.
Proactively seeks opportunities to enhance processes, tools, and products.
Encourages experimentation and learning to drive ongoing improvement.
Drives the execution of multiple business plans and projects by identifying customer and operational needs; developing and communicating business plans and priorities; removing barriers and obstacles that impact performance; providing resources; identifying performance standards; measuring progress and adjusting performance accordingly; developing contingency plans; and demonstrating adaptability and supporting continuous learning.
Provides supervision and development opportunities for associates by selecting and training; mentoring; assigning duties; building a team-based work environment; establishing performance expectations and conducting regular performance evaluations; providing recognition and rewards; coaching for success and improvement; and promoting a belonging mindset in workplace.
Promotes and supports company policies, procedures, mission, values, and standards of ethics and integrity by training and providing direction to others in their use and application; ensuring compliance with them; and utilizing and supporting the Open Door Policy.
Ensures business needs are being met by evaluating the ongoing effectiveness of current plans, programs, and initiatives; consulting with business partners, managers, co-workers, or other key stakeholders; soliciting, evaluating, and applying suggestions for improving efficiency and cost effectiveness; and participating in and supporting community outreach events.
Demonstrates and encourages respect for all; builds a high-performing team; seeks, and embraces differences in people, cultures, ideas and experiences; creates a workplace where all associates feel seen, supported and connected through culture of belonging so associates thrive and perform; drives a positive associate and customer/member experience for all; identifies, attracts, and retains the best team members.
Creates a discipline and focus around developing talent, through feedback, coaching, mentoring, and developmental opportunities; promotes an environment allowing everyone to bring their best selves to work; empowers associates and partners to act in the best interest of the customer/member and company; and regularly recognizes others’ contributions and accomplishments.
Builds strong and trusting relationships with team members and business partners; works collaboratively and cross-functionally to achieve objectives; and communicates and listens attentively, with energy and positivity to motivate, influence, and inspire commitment and action.
Maintains and promotes the highest standards of integrity, ethics and compliance; models the Walmart values and leads by example to foster our culture; supports Walmart’s goal of becoming a regenerative company by making a positive impact for associates, customers, and the world around us (e.g., creating a sense of belonging, eliminating waste, participating in local giving).
Follows the law, our code of conduct and company policies, and sets expectations for others to do the same; promotes an environment where associates feel comfortable sharing concerns and reinforces our culture of non-retaliation; listens to concerns raised by associates. takes action and encourages others to do the same; holds self and others accountable for achieving results in a way that is consistent with our values.
Acts as an altruistic servant leader and is consistently humble, self-aware, honest, and transparent.
Delivers expected business results while putting the customer/member first and consistently applying an omni-merchant mindset and acts with an Every Day Low-Cost mindset to drive value and Every Day Low Prices for customers/members.
Adopts a holistic perspective that considers data, analytics, customer/member insights, and different parts of the business when making plans and shaping the team’s strategy.
Consistently raises the bar and seeks to improve; demonstrates curiosity and a growth mindset; seeks feedback, asks thoughtful questions, fosters an environment that supports learning, innovation, and learning from mistakes, and intelligent risk-taking; and exhibits resilience in the face of setbacks.
Seeks and implements continuous improvements and encourages the team to leverage new digital tools and ways of working.

Benefits

Competitive pay
Performance-based bonus awards
Medical coverage
Vision coverage
Dental coverage
401(k)
Stock purchase
Company-paid life insurance
PTO (including sick leave)
Parental leave
Family care leave
Bereavement
Jury duty
Voting leave
Short-term disability
Long-term disability
Company discounts
Military Leave Pay
Adoption and surrogacy expense reimbursement
PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes.
Live Better U is a Walmart-paid education benefit program for full-time and part-time associates in Walmart and Sam's Club facilities. Programs range from high school completion to bachelor's degrees, including English Language Learning and short-form certificates. Tuition, books, and fees are completely paid for by Walmart.