Mobile System Design Interview #1

System design interviews for mobile are different from backend ones. This series shows you exactly how they work.

What's covered step by step:

• Clarifying scope and requirements (functional vs non‑functional)
• Server‑driven UI concepts for dynamic content
• Section types and personalization
• API design and data modeling
• Pagination strategies
• High‑level architecture (client, network, cache)
• Performance and scalability considerations

Companion repo: A working implementation with typed backend‑driven sections, defensive DTO mapping, cache‑first loading, visibility‑based analytics, optimistic add‑to‑cart, and image pipeline with downsampling.