Frontend System Design

Design component prop interfaces that balance flexibility with ease of use and type safety.

Establish conventions for organizing components in a large codebase (e.g., feature-based vs. atomic design).

Design flexible and composable UI structures using advanced patterns like compound components and slots.

Apply dependency inversion to decouple components from specific data sources, services, and state management libraries.

Distinguish between server state and client state and determine appropriate management strategies for each.

Evaluate the architectural trade-offs of different state management patterns (local, context, global stores) for a large-scale application.

Design a normalized state structure to avoid data duplication and ensure data consistency.

Design and implement optimistic UI updates with rollback mechanisms for improved perceived performance.

Explain how Client-Side Rendering (CSR), Server-Side Rendering (SSR), Static Site Generation (SSG), and Incremental Static Regeneration (ISR) work.

Evaluate the trade-offs of each rendering strategy in terms of performance, SEO, and developer experience.

Select and justify a rendering strategy for a given application based on its requirements and constraints.

Design a hybrid rendering approach that combines multiple strategies within a single application.

Design a data-fetching abstraction layer that decouples API calls from UI components.

Compare REST and GraphQL from a frontend architecture perspective and choose appropriately for given requirements.

Design caching and request deduplication patterns within a data-fetching abstraction layer.

Design a Backend-for-Frontend (BFF) pattern to tailor API responses to frontend needs.

Design resilient network request handling including retry, timeout, and graceful degradation strategies.

Devise a code-splitting and lazy-loading strategy to minimize initial bundle size and improve time-to-interactive.

Design a multi-layered caching strategy for a frontend application using HTTP headers and Service Workers.

Analyze the Critical Rendering Path and identify performance bottlenecks using browser profiling tools to optimize Core Web Vitals.

Apply advanced rendering optimization techniques such as list virtualization for efficiently rendering large data sets.

Analyze how streaming SSR improves time-to-first-byte and perceived load performance.

Define the structure of a design system including design tokens, core components, and documentation.

Implement design tokens for consistent theming (colors, spacing, typography) across a large application.

Design a versioning and distribution strategy for a shared component library consumed by multiple teams.

Apply WAI-ARIA guidelines to build accessible interactive components within a design system.

Explain the micro-frontend pattern and evaluate when it is appropriate versus a monolithic frontend.

Compare micro-frontend integration approaches (e.g., build-time composition, runtime via Module Federation).

Design a strategy for managing shared dependencies and inter-app communication for micro-frontends.

Compare WebSockets, Server-Sent Events (SSE), and long polling for implementing real-time data delivery.

Design a pattern for synchronizing incoming real-time messages with the application's state management.

Implement global error boundaries to gracefully handle and recover from runtime errors.

Design a structured frontend logging strategy suitable for debugging production issues.

Integrate error tracking and Real User Monitoring (RUM) to capture metrics and user interactions in production.

Design a CI/CD pipeline for automated frontend building, testing, and deployment.

Implement feature flags to enable safe, incremental feature rollouts.

Define the scope and core requirements for a large-scale frontend application based on a product brief.

Select and justify architectural choices for rendering, state management, and data fetching based on requirements.

Design the component architecture and folder structure for the proposed system.

Create a plan for ensuring performance, accessibility, and observability.

Document key architectural decisions using a format like Architecture Decision Records (ADRs).

Present and defend the complete frontend system design for a realistic product scenario.