Principal Engineer

  • Full Time
  • CA-Los Angeles
  • Senior Level


At PayPal (NASDAQ: PYPL), we believe that every person has the right to participate fully in the global economy. Our mission is to democratize financial services to ensure that everyone, regardless of background or economic standing, has access to affordable, convenient, and secure products and services to take control of their financial lives.

Job Description Summary:

We’re not solving a small problem, and we’re not addressing a small market. We’re tackling returns—the part of the online shopping experience shoppers say they hate most. Our customers, i.e., top online retailers, use Happy Returns’ returns software and reverse logistics to offer shoppers a genuinely delightful return experience while at the same time reducing costs, retaining sales, and making their supply chains more sustainable. We’re making returns legitimately better for everyone, and we’re having fun doing it.

Your day to day

Plan an architectural path for the engineering organization to enable our systems to scale 100x in an iterative manner.
Work with Product Managers and Engineering Managers to determine the feasibility of product features and recommend simpler more efficient solutions to meet business needs.
Establish best practices when it comes to designing services and work with the technical leaders to ensure teams are adhering to the practices.
Proactively improve our system security and evaluate concerns around PII, data access, and system usage.
Improve the operations of our database and work with technical leaders to optimize inefficiency within views, queries, and data design.
Work with technical leaders to improve the observability of our system through our various monitoring systems.
Enforce clean code and excellent coding practices by conducting thoughtful code reviews for critical areas of the system.

What you need to bring

Outstanding written and verbal communication skills
A minimum of 1 year of experience as a principal engineer working with large-scale distributed enterprise systems or at least 2 years of experience as a technical lead or team lead.
Over 10 years of experience developing and testing SaaS services.
Demonstrated ability to lead a group of technical leaders and raise the bar of technical excellence across the engineering organization.
Demonstrated ability to optimize and tune large-scale databases (PostgreSQL, MySQL, and MongoDB).
A strong interest in joining a highly collaborative environment and working daily with Developers, Product Managers, and DevOps Engineers.
Demonstrated ability to scale systems in an iterative approach with quantifiable results.

Bonus points if you have

Demonstrable SRE knowledge and have worked with teams to establish best practices around SRE concepts.
Expertise in security mitigation and prevention within enterprise systems.
Expert-level knowledge with an observability platform and creating effective monitoring solutions.
Strong interest in e-commerce, logistics, and/or sustainability.

Subsidiary: Happy Returns

Travel Percent: 0

Our Benefits:
At PayPal, we’re committed to building an equitable and inclusive global economy. And we can’t do this without our most important asset—you. That’s 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

Who We Are:
Click Here to learn more about our culture and community.

PayPal has remained at the forefront of the digital payment revolution for more than 20 years. By leveraging technology to make financial services and commerce more convenient, affordable, and secure, the PayPal platform is empowering more than 400 million consumers and merchants in more than 200 markets to join and thrive in the global economy. For more information, visit

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

As part of PayPal’s commitment to employees’ health and safety, we have established in-office Covid-19 protocols and requirements, based on expert guidance. Depending on location, this might include a Covid-19 vaccination requirement for any employee whose role requires them to work onsite. Employees may request reasonable accommodation based on a medical condition or religious belief that prevents them from being vaccinated.

To apply for this job please visit