Third Party Service Integration Questions

Designing and implementing integrations with external services and software development kits in mobile applications. Core areas include secure payment gateway integration, analytics and crash reporting providers, social login and OAuth flows, remote configuration and attribution SDKs, handling webhooks and callbacks, dependency and version management for third party libraries, startup and initialization impacts, privacy and data handling compliance, testing and mocking third party behavior, and designing graceful degradation and retry strategies for unreliable external services. Interviewers probe for patterns to isolate, test, and mitigate risks introduced by third party dependencies.