Software Engineer III - Machine Learning

Position Summary...

We are seeking a Software Engineer III to contribute to the development of intelligent ranking systems that power personalized shopping experiences across our e-commerce platform. This role involves participating in the design, development, and deployment of ranking models, collaborating with data scientists, and contributing to the ranking experimentation platform. You will also be responsible for developing and maintaining data and feature pipelines for machine learning model training and inference.

What you'll do...

We are looking for a Software Engineer to join our team and contribute to the development of intelligent ranking systems that power personalized shopping experiences across our e-commerce platform. This role is ideal for someone with a solid foundation in software engineering and a keen interest in applying machine learning concepts to build scalable systems. You will be involved in evolving the architecture of our ranking and retrieval systems, enabling rapid experimentation and continuous improvement in relevance, engagement, and conversion. What You'll Do:

• Participate in the design, development, and deployment of ranking models using both traditional and deep learning approaches.
• Collaborate with data scientists and senior engineers to translate research into production-ready models.
• Contribute to the development and maintenance of the ranking experimentation platform, including offline evaluation, online A/B testing, and real-time inference.
• Assist in building and optimizing embedding-based retrieval systems using vector similarity search and representation learning.
• Implement components for neural ranking models, including transformers and multi-task learning frameworks.
• Develop and maintain data and feature pipelines for machine learning model training and inference.
• Contribute to the overall technical vision and roadmap for ML infrastructure and ranking systems.

What You'll Bring:

• 3+ years of experience in software engineering.
• Experience building and deploying software systems at scale, with some exposure to ranking, recommendation, or search systems.
• Strong programming skills in Python, Java, or Scala.
• Familiarity with ML frameworks like TensorFlow or PyTorch.
• Understanding of core machine learning concepts and algorithms.
• Experience with data processing and ETL pipelines.
• Familiarity with best practices in software development and testing.

Preferred Qualifications:

• Experience in e-commerce, retail, or large-scale consumer platforms.
• Familiarity with concepts like learning-to-rank (LTR), embedding models, or neural IR techniques.
• Exposure to vector databases (e.g., FAISS, Milvus, Weaviate, Pinecone) or approximate nearest neighbor (ANN) search.
• Experience with cloud platforms (AWS, GCP, or Azure).
• Good communication and collaboration skills.

About Walmart Global Tech 
Imagine working in an environment where one line of code can make life easier for hundreds of millions of people. That’s what we do at Walmart Global Tech. We’re a team of software engineers, data scientists, cybersecurity experts and service professionals within the world’s leading retailers who make an epic impact and are at the forefront of the next retail disruption. People are why we innovate, and people power our innovations. We are people-led and tech-empowered. We train our team in the skillsets of the future and bring in experts like you to help us grow. We have roles for those chasing their first opportunity as well as those looking for the opportunity that will define their career. Here, you can kickstart a great career in tech, gain new skills and experience for virtually every industry, or leverage your expertise to innovate on a scale that impacts millions and reimagine the future of retail.  Flexible, hybrid work: 
We use a hybrid way of working that is primarily in office coupled with virtual when not onsite. Our campuses serve as a hub to enhance collaboration, bring us together for purpose and deliver on business needs. This approach helps us make quicker decisions, remove the location barriers across our global team and be more flexible in our personal lives.   
Benefits: 
Beyond our great compensation package, you can receive incentive awards for your performance. Other great perks include 401(k) match, stock purchase plan, paid maternity and parental leave, PTO, multiple health plans, and much more. 
 
Equal Opportunity Employer: 
Walmart, Inc. is an Equal Opportunity Employer – By Choice. We believe we are best equipped to help our associates, customers and the communities we serve live better when we really know them. That means understanding, respecting and valuing belonging - unique styles, experiences, identities, ideas and opinions – while being inclusive of all people. 
 
The above information has been designed to indicate the general nature and level of work performed in the role. It is not designed to contain or be interpreted as a comprehensive inventory of all responsibilities and qualifications required of employees assigned to this job. The full Job Description can be made available as part of the hiring process.  At Walmart, we offer competitive pay as well as performance-based bonus awards and other great benefits for a happier mind, body, and wallet. Health benefits include medical, vision and dental coverage. Financial benefits include 401(k), stock purchase and company-paid life insurance. Paid time off benefits include PTO (including sick leave), parental leave, family care leave, bereavement, jury duty, and voting. Other benefits include short-term and long-term disability, company discounts, Military Leave Pay, adoption and surrogacy expense reimbursement, and more. You will also receive PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes. The amount you receive depends on your job classification and length of employment. It will meet or exceed the requirements of paid sick leave laws, where applicable. For information about PTO, see https://one.walmart.com/notices. 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.
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.
The annual salary range for this position is $117,000.00 - $234,000.00 Additional compensation includes annual or quarterly performance bonuses. Additional compensation for certain positions may also include :
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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 2 years’ experience in software engineering or related area.
Option 2: 4 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, 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.

Masters: Computer Science

Primary Location...

640 W California Avenue, Sunnyvale, CA 94086-4828, United States of America

Walmart and its subsidiaries are committed to maintaining a drug-free workplace and has a no tolerance policy regarding the use of illegal drugs and alcohol on the job. This policy applies to all employees and aims to create a safe and productive work environment.