Past Project Design Deep-Dive

Prompt Walk through the architecture of a project you have worked on: overall design, the components you owned, and the key technical decisions.

Be ready to discuss

• The end-to-end architecture: services, data stores, and how requests flow through the system.
• Why you chose the design you did — alternatives considered and trade-offs (consistency vs availability, sync vs async, build vs buy).
• Scaling pain points you hit and how you addressed them (caching, queueing, partitioning).
• Failure modes: what happens when a dependency goes down; retries, timeouts, idempotency.
• Runtime/memory management in your stack — be prepared to go deep on garbage collection: how a tracing GC works, generational collection (young/old generations, minor vs major collections), and how allocation patterns affect pause times.