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Staff ML engineer in San Jose at PayPal

Date Posted: 6/17/2020

Job Snapshot

Job Description

Fueled by a fundamental belief that having access to financial services creates opportunity, PayPal (NASDAQ: PYPL) is committed to democratizing financial services and empowering people and businesses to join and thrive in the global economy. Our open digital payments platform gives PayPal’s 305 million active account holders the confidence to connect and transact in new and powerful ways, whether they are online, on a mobile device, in an app, or in person. Through a combination of technological innovation and strategic partnerships, PayPal creates better ways to manage and move money, and offers choice and flexibility when sending payments, paying or getting paid. Available in more than 200 markets around the world, the PayPal platform, including Braintree, Venmo and Xoom enables consumers and merchants to receive money in more than 100 currencies, withdraw funds in 56 currencies and hold balances in their PayPal accounts in 25 currencies.

The PayPal Personalization AI team designs, builds, maintains, and improves the machine learning models that are used across all PayPal’s consumer and merchant experiences. Our suite of AI/ML products allow all experience teams in PayPal to enable state of the art recommendation systems in all communication channels and improve user experiences across the board. As a Staff Machine Learning Engineer in our fast-moving, entrepreneurial team, you will design, build, and optimize our multiple recommendation systems, as well as the ML pipeline and data infrastructure. You will own projects end-to-end and drive design decisions that affect millions of users worldwide.


  • Optimize and improve several real-time recommendation systems by evaluating new strategies, productionizing your changes, and A/B testing them
  • Use state of the art methods for ranking, NLP, supervised and unsupervised learning, to optimize performance of recommendation systems
  • Use statistical methods and good experiment design to ensure real gains from your model changes


  • MS/PhD in Computer Science or a related field, specialization in ML/AI.
  • Solid knowledge in statistics/experiment design
  • 4+ years of full time experience in developing large scale production ML systems 
  • Experience in object oriented programming (Python and Scala is a plus)
  • Knowledge of relational databases and query authoring (SQL)

We're a purpose-driven company whose beliefs are the foundation for how we conduct business every day. We hold ourselves to our One Team Behaviors which demand that we hold the highest ethical standards, to empower an open and diverse workplace, and strive to treat everyone who is touched by our business with dignity and respect. Our employees challenge the status quo, ask questions, and find solutions. We want to break down barriers to financial empowerment. Join us as we change the way the world defines financial freedom.

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



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