When designing backend systems, modern cloud engineers frequently take high-bandwidth, low-latency client environments for granted. However, millions of end users globally operate under severe digital, economic, and infrastructural constraints. To reach these populations, developers must bypass heavy client-side applications and interface directly with core telecommunications primitives: USSD (Unstructured Supplementary Service Data) and IVR (Interactive Voice Response).

Using a real-world public health surveillance platform as an engineering case study, this workshop provides a step-by-step breakdown of how to build, containerize, and deploy an enterprise-grade cellular ingestion engine on Google Cloud Platform.

Attendees will learn how to solve the unique distributed systems challenges imposed by telecommunications gateways—such as rigid 3-second backend timeouts, transient session states, and duplicate webhook retries caused by volatile cellular towers.

Key Technical Takeaways:

Stateless Microservice Orchestration
Deterministic Session Tokenization
Idempotent NoSQL Ingestion
Edge Media Delivery for Voice (IVR)
Asynchronous Event Loops