Principal, Software Engineer
Walmart
Software Engineering
Posted on Mar 18, 2026
Position Summary...
What you'll do...
Principal Software Engineer – Code Puppy AI & Data | Walmart Global Tech Join Walmart as a Principal Software Engineer within our AI & Data organization and help make it trivially easy for associates—engineers, data scientists, and citizen developers—to go from idea to AI-based solutions quickly, safely, and cost‑effectively. At Walmart, we operate at Fortune #1 scale. Our challenges are complex, global, and deeply meaningful. Here, you’ll do the best work of your life—work that helps people save money and live better. About AI & Data The AI & Data organization within Walmart Global Tech is building a platform‑first ecosystem that centralizes enterprise data, provides standardized AI foundations, and delivers intuitive AI solutions for all personas. We are enabling AI at enterprise scale—responsibly, securely, and reliably. Position Summary As a Principal Software Engineer, you will serve as a senior technical authority and hands-on architect across critical AI & Data platforms. You will shape system architecture, influence engineering standards, and drive platform strategy that supports AI-powered experiences across Walmart globally. This role requires deep expertise in distributed systems, platform engineering, and AI‑enabled architectures, combined with the ability to influence across teams and elevate technical rigor enterprise‑wide. You will:- Own high-impact architectural decisions
- Drive scalable, resilient system design
- Prototype and productionize advanced AI‑enabled capabilities
- Mentor senior engineers and act as a technical force multiplier
- Balance long‑term platform sustainability with near‑term business outcomes
- Define and evolve reference architectures for distributed systems, AI pipelines, and platform services.
- Lead system design reviews to ensure scalability, reliability, observability, and cost efficiency.
- Design systems that integrate seamlessly with enterprise data and AI foundations.
- Make thoughtful architectural trade-offs balancing long-term platform integrity with short-term delivery needs.
- Improve end-to-end system reliability and quality across local clients, gateways, and external APIs (debugging, telemetry, and performance tuning).
- Implement security and compliance guardrails for local execution, including least-privilege access, secrets management, auditing, and allowlists/denylists where appropriate.
- Build comprehensive testing strategies, including unit, integration, contract tests for tool schemas, and end-to-end tests for common workflows.
- Drive engineering excellence through code reviews, design documentation, mentoring, incident postmortems, and elevated operational standards.
- Lead the development of AI-powered services, agent workflows, and internal builder platforms.
- Prototype and productionize GenAI-enabled capabilities within secure, governed environments.
- Partner with data scientists and ML engineers to harden models into scalable, production-grade systems.
- Champion responsible AI patterns, including guardrails and human‑in‑the‑loop design.
- Contribute code and prototypes for complex, high-risk, or ambiguous initiatives.
- Raise engineering standards through rigorous code reviews, operational reviews, and architectural discussions.
- Improve CI/CD pipelines, reliability engineering, and platform observability practices.
- Establish and track performance, reliability, and cost benchmarks.
- Partner closely with product, governance, enterprise data, and infrastructure teams.
- Translate complex technical concepts into clear, business-impact narratives.
- Drive consensus across senior engineers and engineering leaders.
- Influence multi‑team roadmaps and reduce architectural fragmentation.
- Mentor senior engineers and emerging technical leaders.
- Elevate architectural maturity across teams.
- Create reusable frameworks, patterns, and internal documentation that extend impact beyond your immediate team.
- 12+ years of experience building highly available, distributed systems.
- Proven track record of delivering complex, enterprise‑scale software systems from inception to production.
- Experience with LLM tool‑calling and agentic systems, including structured tool invocation, schema validation, prompt/tool definition design, and guardrails.
- Familiarity with schema and contract frameworks such as JSON Schema, OpenAPI, Pydantic, and protobuf, including strategies for backward‑compatible evolution.
- Experience integrating data and query execution systems (e.g., BigQuery‑like workflows) with governance and cost controls.
- Strong observability experience, including structured logging, metrics, tracing, and debugging distributed flows across client and gateway layers.
- Experience working with AI/ML ecosystems in production environments.
- Sound architectural judgment with the ability to evaluate complex trade-offs.
- Exceptional communication, influence, and consensus‑building skills.
- Demonstrated ability to mentor and grow technical talent.
- Intellectual curiosity and the ability to rapidly learn new domains and technologies.
- Option 1: Bachelor’s degree in Computer Science, Computer Engineering, Computer Information Systems, Software Engineering, or a related field, plus 5 years of experience in software engineering or a related area.
- Master’s degree in Computer Science or a related field.
- Experience building AI‑first platforms or internal developer ecosystems.
- Experience embedding responsible AI and governance practices into engineering workflows.
- Knowledge of accessibility best practices, including WCAG 2.2 AA standards.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to a specific plan or program terms.
For information about benefits and eligibility, see One.Walmart.
Bentonville, Arkansas US-10735: The annual salary range for this position is $110,000.00 - $220,000.00
Sunnyvale, California US-11807: The annual salary range for this position is $143,000.00 - $286,000.00
Bellevue, Washington US-11075: The annual salary range for this position is $132,000.00 - $264,000.00 Additional compensation includes annual or quarterly performance bonuses. Additional compensation for certain positions may also include :
- Stock
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Minimum Qualifications...
Outlined below are the required minimum qualifications for this position. If none are listed, there are no minimum qualifications.
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.
Preferred Qualifications...
Outlined below are the optional preferred qualifications for this position. If none are listed, there are no preferred qualifications.
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., We value candidates with a background in creating inclusive digital experiences, demonstrating knowledge in implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards, assistive technologies, and integrating digital accessibility seamlessly. The ideal candidate would have 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.
