Senior Site Reliability Engineer (Mobile)

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 Summary:

We are building a new Mobile SRE team focused on ensuring the reliability, availability, and performance of our iOS and Android applications. While our existing SRE organization focuses on backend and web services, this new team will bridge the gap between mobile clients and backend systems, ensuring a seamless end-to-end experience for our customers. 
As a Senior Mobile SRE, you will be a hands-on engineer responsible for implementing reliability standards, building automation, and driving operational excellence within the mobile engineering organization. You will work closely with the Staff Mobile SRE and partner teams to execute on the vision and help mobile engineers adopt a stronger culture of reliability and performance. 

Job Description:

• Manage and deliver large-scale reliability improvement projects, ensuring systems are performant, available, and resilient.
• Drive the identification of performance bottlenecks and lead initiatives to optimize and scale critical systems and services.
• Architect and implement scalable infrastructure solutions to support growing user demands while maintaining system reliability.
• Lead the design and enhancement of monitoring frameworks, ensuring systems are highly observable, and support the response to production incidents.
• Take ownership of improving system resilience by designing fault-tolerant architectures and implementing disaster recovery strategies.
• Lead capacity planning initiatives to ensure system resources are proactively managed, preventing downtime or performance degradation under high load.
• Work closely with development, operations, and other technical teams to ensure seamless system integration and align on best practices for reliability.
• Act as a technical mentor within the organization, guiding teams through complex reliability challenges and promoting a culture of excellence.
• Help define and execute long-term reliability engineering strategies and standards to ensure the scalability and performance of core services.
• Develop and enforce best practices for operational excellence, including automation, incident management, and system monitoring, across engineering teams.

• 5+ years relevant experience and a Bachelor’s degree OR Any equivalent combination of education and experience.

Key Responsibilities 

Reliability & Observability 

• Implement mobile-specific SLIs and SLOs (e.g., crash-free sessions, ANRs, app startup time, network success rates). 
• Build and maintain Datadog dashboards, alerts, and playbooks for mobile services. 
• Ensure instrumentation in mobile apps produces actionable telemetry. 

Tooling & Automation 

• Develop automation and tools under the guidance of the Staff676 SRE, including: 
• Crash/ANR triage workflows. 
• Automated regression detection for performance and reliability. 
• Dashboards and bots to surface release health. 
• Contribute to libraries and scripts for consistent instrumentation across iOS/Android apps. 

Incident Response 

• Participate in on-call rotations for mobile incidents. 
• Drive root cause analysis, document lessons learned, and contribute to blameless postmortems. 
• Collaborate with backend SREs and service owners on cross-system issues. 

Collaboration & Enablement 

• Partner with mobile developers to embed reliability practices into development and testing. 
• Provide guidance on instrumentation, monitoring, and alerting best practices. 
• Advocate for operational readiness of features before release. 

Continuous Improvement 

• Identify areas of operational toil and automate repetitive tasks. 
• Contribute to the evolution of reliability processes and tooling across mobile teams. 

 

Qualifications 

Required 

• 6+ years of experience in software engineering, SRE, or mobile development roles. 
• Strong understanding of iOS and/or Android development and performance profiling. 
• Hands-on experience with observability platforms (e.g., Datadog, Firebase Crashlytics, Sentry). 
• Experience building automation, scripts, or tools for reliability (Python, Go, or similar). 
• Working knowledge of Swift/Kotlin for instrumentation in mobile apps. 
• Strong problem-solving and debugging skills, especially in cross-system issues. 
• Experience in incident response and root cause analysis. 

Preferred 

• Familiarity with CI/CD for mobile (Harness, Fastlane, Jenkins). 
• Knowledge of Gradle and Bazel build systems. 
• Previous exposure to setting up on-call models or alerting frameworks. 
• Experience collaborating in a distributed, global engineering team. 

 

Success in This Role Means 

• Mobile apps have reliable monitoring and alerting with meaningful signals in Datadog. 
• Automation and tools reduce manual toil and improve incident detection and resolution speed.
• Mobile development teams are better equipped to handle on-call and operational ownership. 
• Issues impacting mobile reliability are identified early and mitigated quickly. 
• End-user experience improves through reduced crashes, ANRs, and performance regressions. 
•  

Subsidiary:

PayPal

Travel Percent:

0

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PayPal is committed to fair and equitable compensation practices.

Actual Compensation is based on various factors including but not limited to work location, and relevant skills and experience.

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 https://www.paypalbenefits.com.

The US national annual pay range for this role is $111,500 to $191,950

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, 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 https://www.paypalbenefits.com.

Who We Are:

Click Here to learn more about our culture and community.

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 [email protected].

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 don’t hesitate to apply.