I integrate complex third-party APIs such as Stripe, Twilio, Google APIs, AWS services, payment gateways, CRM systems, and IoT platforms into Python applications. My implementations include secure token and credential management, advanced error-retry and fallback logic, automatic request throttling to handle rate limits, and webhook processing with signature validation. I also build structured API clients, payload mappers, response normalizers, and monitoring logs to ensure reliability and traceability. The result is a stable, scalable integration layer that connects your application seamlessly with external services while maintaining strong security and high performance.