Sr Software Engineer
About The Position
PayPal, Inc. seeks Sr Software Engineer in San Jose, CA. This role involves designing and implementing advanced mobile testing architectures, optimizing test execution, and developing unified user provisioning systems. The engineer will also build infrastructure for monitoring mobile platform health, create mobile mutation testing platforms, and integrate AI/LLM capabilities into development workflows. Additionally, the role includes developing sophisticated test automation frameworks, AI-powered test optimization pipelines, performance profiling tools, and advanced test result analytics. The engineer will design, develop, and maintain iOS applications using Swift, SwiftUI, UIKit, and Objective-C, implementing data persistence solutions, asynchronous operations, and integrating RESTful APIs and GraphQL services. Responsibilities also include writing unit and integration tests, collaborating with cross-functional teams, leading code reviews, optimizing application performance, debugging issues, designing scalable architecture patterns, and ensuring applications meet Apple's guidelines. Staying current with iOS SDK updates and new Apple technologies is essential. Partial telecommuting is permitted from within a commutable distance.
Requirements
- Bachelor’s degree, or foreign equivalent, in Computer Science, Engineering or a closely related field plus five years of experience in the job offered or a related occupation.
- Experience designing and developing mobile applications using Swift programming language and iOS SDK (5 years)
- Experience developing user interfaces for iOS applications using SwiftUI framework and declarative programming (3 years)
- Experience building iOS applications using UIKit framework (5 years)
- Experience developing asynchronous operations using Swift Concurrency including async/await (2 years)
- Experience implementing data persistence and management in iOS applications using Core Data framework (3 years)
- Experience with Swift Data framework (1 year)
- Experience with reactive programming using Combine framework for iOS applications (3 years)
- Experience writing unit tests and UI tests for iOS applications using XCTest and XCUITest frameworks (5 years)
- Experience with Swift Testing framework (1 year)
- Experience with iOS debugging and performance profiling tools including Xcode instruments (5 years)
- Experience with dependency management using Swift Package Manager, CocoaPods, or Carthage (3 years)
- Experience with mobile application architecture patterns including MVVM, MVC, or clean architecture (5 years)
- Experience designing and integrating RESTful APIs in iOS applications using URLSession (3 years)
- Implement CI/CD pipelines for automated builds and deployments of iOS apps (1 year)
- Experience implementing machine learning workflows in mobile applications using XGBoost or similar gradient boosting algorithms (1 year)
Responsibilities
- Design and implement mobile Monorepo testing architecture utilizing NX build system, integrating CocoaPods dependency management, and establishing iOS-specific testing workflows to support scalable test execution across multiple mobile applications.
- Develop predictive test selection algorithms using machine learning techniques to analyze historical test data, code changes, and failure patterns, implementing these models within Harness CI to optimize test execution time by 40-60%.
- Architect unified user provisioning system by migrating disparate user creation mechanisms to a single-source conditioning platform, ensuring consistent test data management across all mobile testing environments.
- Build comprehensive metrics collection infrastructure to monitor mobile platform health, including custom instrumentation for tracking infrastructure issues, test flakiness rates, performance degradation, and resource utilization patterns.
- Design and implement mobile mutation testing platform using advanced code mutation techniques to validate test suite effectiveness, identifying gaps in test coverage and improving overall code quality metrics.
- Integrate Model Context Protocol (MCP) servers into mobile development workflows by implementing MCP-compatible interfaces that enable engineers to leverage AI/LLM capabilities for automated code generation, test case creation, debugging assistance, and documentation generation directly within their development environment.
- Develop sophisticated test automation frameworks leveraging XCTest and XCUITest, implementing custom assertions, test helpers, and reusable components that support both UIKit and SwiftUI applications.
- Create AI-powered test optimization pipelines within CI/CD systems, implementing intelligent test scheduling, parallel execution strategies, and dynamic resource allocation based on historical performance data.
- Engineer performance profiling and analysis tools for mobile applications, including automated memory leak detection, UI rendering performance validation, and network request optimization testing.
- Implement advanced test result analytics platform using data visualization and statistical analysis to identify testing trends, predict potential failures, and provide actionable insights to development teams.
- Design, develop, and maintain iOS applications using Swift, SwiftUI, UIKit, and Objective-C.
- Implement data persistence solutions using SwiftData and Core Data frameworks for local storage management.
- Develop asynchronous and concurrent operations using Swift Concurrency (async/await) and Combine framework.
- Integrate RESTful APIs and GraphQL services into iOS applications, implementing efficient networking layers, managing data synchronization, handling authentication flows, and optimizing query performance for both REST endpoints and GraphQL operations.
- Write unit tests and integration tests using Swift Testing framework and XCTest to ensure code quality.
- Collaborate with cross-functional teams to define, design, and ship new features.
- Lead code reviews and provide technical guidance to junior developers.
- Optimize application performance, memory usage, and battery consumption.
- Debug and resolve complex technical issues and crashes.
- Design and implement scalable, maintainable architecture patterns (MVC, MVVM, VIPER).
- Ensure applications meet Apple's Human Interface Guidelines and App Store requirements.
- Stay current with iOS SDK updates and new Apple technologies.
Benefits
- Generous paid time off
- Healthcare coverage for you and your family
- Resources to create financial security
- Support your mental health
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What This Job Offers
Job Type
Full-time
Career Level
Senior
