Sr Staff Software Engineer Machine Learning Sr Staff Software Engineer Machine Learning Get AI-powered advice on this job and more exclusive features. The Company PayPal has been revolutionizing commerce globally for more than 25 years. Creating innovative experiences that make moving money, selling, and shopping simple, personalized, and secure, PayPal empowers consumers and businesses in approximately 200 markets to join and thrive in the global economy.

We operate a global, two-sided network at scale that connects hundreds of millions of merchants and consumers. We help merchants and consumers connect, transact, and complete payments, whether they are online or in person. PayPal is more than a connection to third-party payment networks. We provide proprietary payment solutions accepted by merchants that enable the completion of payments on our platform on behalf of our customers.

We offer our customers the flexibility to use their accounts to purchase and receive payments for goods and services, as well as the ability to transfer and withdraw funds. We enable consumers to exchange funds more safely with merchants using a variety of funding sources, which may include a bank account, a PayPal or Venmo account balance, PayPal and Venmo branded credit products, a credit card, a debit card, certain cryptocurrencies, or other stored value products such as gift cards, and eligible credit card rewards. Our PayPal, Venmo, and Xoom products also make it safer and simpler for friends and family to transfer funds to each other. We offer merchants an end-to-end payments solution that provides authorization and settlement capabilities, as well as instant access to funds and payouts. We also help merchants connect with their customers, process exchanges and returns, and manage risk. We enable consumers to engage in cross-border shopping and merchants to extend their global reach while reducing the complexity and friction involved in enabling cross-border trade.

Our beliefs are the foundation for how we conduct business every day. We live each day guided by our core values of Inclusion, Innovation, Collaboration, and Wellness. Together, our values ensure that we work together as one global team with our customers at the center of everything we do and they push us to ensure we take care of ourselves, each other, and our communities.

Job Description Summary: Join PayPals Consumer Product Catalog and Search team and help build the next generation of product discovery for millions of global shoppers. We own the backend and data infrastructure that powers search, recommendations, and catalog knowledge at global scale. As a Machine Learning Engineer, youll contribute to key components of the product search stack - including indexing pipelines, and query-time services that deliver fast and relevant search results. Youll collaborate closely with backend engineers and catalog data teams to enable intelligent, contextual, and scalable search capabilities.

Job Description: What Youll Do

Develop and optimize machine learning models to enhance search relevance and ranking for millions of users. Collaborate with cross-functional teams, including data and backend engineers, to build scalable and efficient search solutions. Evaluate search performance using offline metrics and live A/B experiments, driving continuous improvement. Stay current with the latest research and innovations in search-related ML technologies and recommendation systems, translating them into scalable production solutions.

What Were Looking For Bachelors or Masters in Computer Science, Software Engineering, Machine Learning, or related field. 8+ years of industry experience with deep learning architectures, building, fine-tuning and deploying ML models in production. Strong proficiency in Python, Scala, or other programming languages. Familiarity with ML frameworks (TensorFlow, PyTorch, XGBoost, etc.). Experience working with large datasets, data processing pipelines (e.g., Dataflow, Spark, Flink), and scalable architectures. Strong communication and collaboration skills, with the ability to work effectively across teams and contribute to a high-performing engineering culture.

PayPal does not charge candidates any fees for courses, applications, resume reviews, interviews, background checks, or onboarding. Any such request is a red flag and likely part of a scam. To learn more about how to identify and avoid recruitment fraud please visit https://careers.pypl.com/contact-us.

For the majority of employees, PayPal's balanced hybrid work model offers 3 days in the office for effective in-person collaboration and 2 days at your choice of either the PayPal office or your home workspace, ensuring that you equally have the benefits and conveniences of both locations.

Our Benefits:

At PayPal, were committed to building an equitable and inclusive global economy. And we cant do this without our most important asset-you. Thats why we offer benefits to help you thrive in every stage of life. We champion your financial, physical, and mental health by offering valuable benefits and resources to help you care for the whole you.

We have great benefits including a flexible work environment, employee shares options, health and life insurance and more. To learn more about our benefits please visit https://www.paypalbenefits.com

Who We Are:

To learn more about our culture and community visit https://about.pypl.com/who-we-are/default.aspx

Commitment to Diversity and Inclusion

PayPal provides equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, pregnancy, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state, or local law. In addition, PayPal will provide reasonable accommodations for qualified individuals with disabilities. If you are unable to submit an application because of incompatible assistive technology or a disability, please contact us at paypalglobaltalentacquisition@paypal.com.

Belonging at PayPal:

Our employees are central to advancing our mission, and we strive to create an environment where everyone can do their best work with a sense of purpose and belonging. Belonging at PayPal means creating a workplace with a sense of acceptance and security where all employees feel included and valued. We are proud to have a diverse workforce reflective of the merchants, consumers, and communities that we serve, and we continue to take tangible actions to cultivate inclusivity and belonging at PayPal.

Any general requests for consideration of your skills, please Join our Talent Community.

We know the confidence gap and imposter syndrome can get in the way of meeting spectacular candidates. Please dont hesitate to apply.

REQ ID R0127805 Seniority level Seniority level Not Applicable Employment type Employment type Full-time Job function Industries Software Development, Financial Services, and Technology, Information and Internet Referrals increase your chances of interviewing at Honey by 2x Sign in to set job alerts for Senior Staff Software Engineer roles. Lead Software Engineer, Rocket Travel by Agoda Chicago, IL $148,949.00-$220,000.00 5 days ago Chicago, IL $140,000.00-$225,000.00 2 weeks ago Chicago, IL $137,400.00-$233,600.00 2 weeks ago Sr. GoLang AND C++ Developer - Chicago, IL or Reston, VA- ONSITE (4 days a week) Chicago, IL $126,788.71-$190,183.06 2 weeks ago Chicago, IL $135,000.00-$165,000.00 4 days ago Senior Software Engineer, Backend - Fintech Chicago, IL $150,000.00-$350,000.00 1 week ago Chicago, IL $185,000.00-$235,000.00 1 week ago Principal Software Engineer (.NET / Azure) Chicago, IL $110,000.00-$150,000.00 1 month ago Chicago, IL $180,000.00-$220,000.00 2 weeks ago Chicago, IL $123,500.00-$212,850.00 1 month ago Chicago, IL $80,000.00-$120,000.00 1 week ago Chicago, IL $88,000.00-$110,000.00 5 days ago Chicago, IL $80,000.00-$120,000.00 1 month ago Chicago, IL $115,000.00-$138,000.00 3 weeks ago Deerfield, IL $127,500.00-$204,000.00 1 month ago Deerfield, IL $127,500.00-$204,000.00 1 month ago Senior Software Engineer (Remote) - React, Node Chicago, IL $170,000.00-$200,000.00 4 months ago Principal Software Engineer (.NET) Developer Chicago, IL $100,000.00-$110,000.00 3 weeks ago Were unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. #J-18808-Ljbffr