In large-scale IoT SaaS systems, where thousands of devices across multiple tenants are constantly communicating, data and control messages can flow unpredictably and at varying rates throughout the day. The complexity multiplies in a IoT SaaS platform when tenant isolation, device authorization, and data security cross all communications needs to be considered. Serverless and event-driven architectures provide a dynamic and efficient solution to this multi-tenant challenge.

In this session, we'll explore how serverless and event-driven architectures provide the foundation for robust IoT SaaS solutions. I'll walk you through the architectural decisions behind building a multi-tenant IoT platform, diving deep into the unique challenges we faced, including AWS IoT Core limitation. We'll cover critical aspects like device onboarding, tenant data isolation, authorization patterns for both humans and devices, and security considerations for IoT SaaS platforms. Additionally, we'll examine how effective IoT SaaS platforms require multi-region support to ensure low-latency device connectivity for global deployments, and the architectural implications this brings.

To bring these concepts to life, I'll showcase how my own BBQ smoker leverages this platform, demonstrating real-world usage of the multi-tenant architecture we built. Join me to understand how serverless and event-driven architectures can unlock the full potential of IoT SaaS platform, enabling resilient and scalable systems that are easy to manage and adapt to evolving demands.

**Target Audience:** Software architects, IoT platform engineers, SaaS developers, and cloud engineers working with or planning to build multi-tenant IoT solutions. Prior experience with AWS IoT services and serverless architectures is recommended.

**Session Level:** 300 (Advanced) - This session assumes familiarity with AWS services, IoT concepts, and basic understanding of multi-tenancy challenges. Attendees should have hands-on experience with serverless architectures and cloud development.