Full Stack Architecture and Feature Design Questions
Ability to design complete features considering frontend UX, backend API design, database schema, and data flow. Understanding of separation of concerns and communication between layers. API-first design thinking. Discussing trade-offs (e.g., complex queries on backend vs post-processing on frontend). Designing for extensibility and maintainability.
MediumSystem Design
0 practiced
Design a paginated search API that supports sorting, filtering, and faceted counts with a target 200ms latency for 95th percentile. Discuss which computations should happen on backend (aggregations, counts) vs frontend (client-side filtering), denormalized read models or precomputed facets, and implications for freshness vs cost.
HardSystem Design
0 practiced
Design a secure, reliable webhook delivery platform for third-party integrations. Include signing and verification, retry/backoff policy, idempotency for receivers that retry requests, monitoring for slow or failed consumers, rate-limiting for abusive receivers, and how to safely version the webhook contract.
HardSystem Design
0 practiced
Design a real-time collaborative editing feature (document editing) for many concurrent users. Compare Operational Transformation (OT) and CRDT approaches for conflict resolution, list the responsibilities of the collaboration server vs clients, and explain how you'd scale the collaboration layer for many documents and users.
MediumTechnical
0 practiced
You are asked to implement client-side and server-side protections to avoid frontends sending extremely expensive queries to your backend (e.g., nested filters that cause heavy joins). Propose a combination of request validation, query cost estimation, and server-side safeguards, and explain how you'd communicate errors and rate limits back to the client.
MediumTechnical
0 practiced
Design an API versioning and migration strategy for both public and internal APIs. Cover URL vs header versioning, semantic versioning for contracts, deprecation timelines, documentation, and CI checks to prevent breaking consumers. Include a rollback/migration plan for a breaking change.
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