PayPal Staff Software Engineer Experimentation 

United States, California, San Jose 

333974828

This job acts as a project leader, coordinating the activities of other engineers, determining technical tasks, and improving existing structures and processes. It involves making technical decisions, collaborating with management to set standards, and representing the company to external partners.

Essential Responsibilities:

• Acts as a project or system leader, coordinating the activities of other engineers on the project or within the system
• Determines the technical tasks that other engineers will follow
• Actions result in the achievement of customer, operational, program or service objectives
• Proactively improves existing structures & processes
• Exercises judgement in reconciling diverse and competing priorities (time, quality, complexity risk) to identify optimal solutions to problems
• Notices patterns and condenses repetition into densely meaningful generalized solutions
• Collaborates with management to set/improve standards for engineering rigor
• Trusted to represent PayPal, Inc to the outside world via interactions with partners, customers, or industry organizations

Minimum Qualifications:

• Minimum of 8 years of relevant work experience and a Bachelor's degree or equivalent experience.

Additional Responsibilities

• Provide technical leadership across multiple workstreams, balancing business priorities, platform improvements, and AI/ML-driven innovations.

• Drive design reviews and technical deep dives, ensuring scalability, fault tolerance, and performance for a platform processing 30B+ evaluations/day.

• Establish and enforce best practices for engineering rigor, code quality, and experimentation methodology across teams.

• Partner closely with Data Science and Machine Learning stakeholders to evolve experiment design, metric frameworks, and score carding methodologies.

• Anticipate future platform needs, identifying opportunities for simplification, automation, and extensibility.

• Mentor engineers across levels, fostering a culture of innovation, technical excellence, and continuous improvement.

• Represent PayPal in industry forums, conferences, and working groups to influence the future of experimentation platforms and standards.

Preferred Qualifications

• Advanced degree (MS/PhD) in Computer Science, Engineering, Statistics, or a related field.

• 8+ years of software engineering experience with at least 2+ years in technical leadership roles.

• Proven expertise in large-scale distributed systems, data pipelines, and high-throughput services.

• Strong background in experimentation, causal inference, or applied statistics (e.g., A/B testing, bandit algorithms, sequential testing).

• Hands-on experience with modern experimentation platforms, large-scale data storage/processing systems (e.g., Spark, Flink, Kafka), and cloud-native architectures.

• Demonstrated ability to influence cross-functional stakeholders (Product, Data Science, Business) with strong written and verbal communication.

• Experience mentoring senior engineers and setting long-term technical direction for complex systems.

• Thought leadership in experimentation methodology, measurement frameworks, or ML-driven optimization.

Travel Percent:

The total compensation for this practice may include an annual performance bonus (or other incentive compensation, as applicable), equity, and medical, dental, vision, and other benefits. For more information, visit .

The US national annual pay range for this role is $152,500 to $262,350

Our Benefits:

Any general requests for consideration of your skills, please