Backend System Design

Choose consistency and availability trade-offs

Maps business invariants and stale-data tolerance to strong or eventual consistency, explicit failure behavior, reconciliation, and user-visible state.

Design a backend for large report exports

Designs an async export flow for large reports without blocking API requests or exhausting database and memory resources.

Design a backend read model for an analytics dashboard

Designs dashboard APIs with precomputed metrics, freshness rules, query cost control, and drill-down support.

Design a business workflow state machine

Designs explicit workflow states, allowed transitions, guard rules, audit history, idempotency, and operational repair paths.

Design a feature flag rollout backend

Designs feature flag storage, targeting, safe defaults, auditability, and rollout observability for backend behavior.

Design a multi-tenant SaaS backend boundary

Designs tenant isolation across API, data, cache, background jobs, search, and admin access.

Backend System Design Foundation

Backend reliability, APIs, data boundaries, and operational design.

A backend system design track covering architecture framing, service boundaries, data and API design, distributed systems, reliability, operations, and production trade-offs.