# Mockingly

> AI mock interview platform for system design. Practice with an AI that thinks like a FAANG lead engineer — asks hard follow-ups, scores your architecture, and gives instant feedback. Free to start, no credit card required.

Mockingly (mockingly.ai) helps software engineers prepare for system design interviews at Google, Meta, Amazon, Microsoft, Netflix, Uber, Airbnb, and Stripe. The platform offers conversational AI interviews, an interactive whiteboard for drawing architecture diagrams, a readiness score, and company-specific question sets. Free plan is unlimited; Pro plan is $14/month and adds detailed analysis, readiness score, company-specific questions, and trivia quizzes.

## Key Pages

- [Homepage](https://www.mockingly.ai/): Platform overview, features, pricing, and free sign-up
- [Pricing](https://www.mockingly.ai/pricing): Free vs Pro plan comparison ($14/month)
- [Practice](https://www.mockingly.ai/practice): Start an AI mock system design interview session
- [Question Bank](https://www.mockingly.ai/questions): Browse system design questions
- [Blog](https://www.mockingly.ai/blog): System design interview guides (backend and Android)

## System Design Guides — Backend

- [Chat System Design](https://www.mockingly.ai/blog/chat-system-design): WebSockets, message fan-out, delivery guarantees, group chat schema
- [CDN System Design](https://www.mockingly.ai/blog/cdn-system-design): Anycast routing, PoP architecture, cache invalidation, DDoS mitigation
- [Distributed ID Generator](https://www.mockingly.ai/blog/distributed-id-generator-system-design): Snowflake structure, clock skew, monotonicity guarantees
- [Distributed Task Scheduler](https://www.mockingly.ai/blog/distributed-task-scheduler-system-design): Job queues, leader election, fault tolerance
- [Metrics, Monitoring & Alerting](https://www.mockingly.ai/blog/metrics-monitoring-alerting-system-design): Time-series storage, alert pipelines, observability stack
- [Distributed Logging](https://www.mockingly.ai/blog/distributed-metrics-logging-system-design): Log aggregation, indexing, retention strategies
- [Design a Rate Limiter](https://www.mockingly.ai/blog/design-rate-limiter): Token bucket, sliding window, distributed rate limiting
- [Real-time Messaging](https://www.mockingly.ai/blog/real-time-messaging-system-design): Push vs pull, presence, ordering
- [Collaborative Editor](https://www.mockingly.ai/blog/collaborative-editor-system-design): Operational transforms, CRDTs, conflict resolution
- [Pastebin](https://www.mockingly.ai/blog/pastebin-system-design): URL generation, expiry, read-heavy workload
- [Google Calendar](https://www.mockingly.ai/blog/google-calendar-system-design): Recurring events, time zones, invitations
- [Instagram Feed](https://www.mockingly.ai/blog/instagram-social-feed-system-design): Feed generation, fan-out strategies, caching
- [E-commerce](https://www.mockingly.ai/blog/ecommerce-system-design): Product catalog, cart, checkout, inventory
- [DoorDash](https://www.mockingly.ai/blog/doordash-system-design): Marketplace architecture, dispatch, real-time tracking
- [Online Book Review](https://www.mockingly.ai/blog/online-book-review-system-design): Content moderation, ranking, sharding

## System Design Guides — Android / Mobile

- [Complete Android System Design Framework](https://www.mockingly.ai/blog/complete-android-system-design-interview-framework): The full mobile system design interview methodology
- [Android System Design Practice Questions](https://www.mockingly.ai/blog/android-system-design-practice-questions): Curated mobile-focused questions
- [Android Notification System](https://www.mockingly.ai/blog/android-notification-system-design): Push notifications, FCM, delivery guarantees
- [Android Reddit Client](https://www.mockingly.ai/blog/android-reddit-system-design): Offline-first, pagination, sync
- [Android Notes App](https://www.mockingly.ai/blog/android-notes-app-system-design): Local storage, sync, conflict resolution
- [Android Photo App](https://www.mockingly.ai/blog/android-photo-app-system-design): Image pipeline, caching, lazy loading
- [Android Trading App](https://www.mockingly.ai/blog/android-trading-app-system-design): Real-time data, security, performance
- [Uber Android Architecture](https://www.mockingly.ai/blog/uber-android-system-design): RIBs architecture, location services

## Platform Capabilities

- AI interviewer generates contextual follow-up questions based on the candidate's specific design
- Interactive whiteboard canvas with drag-and-drop architecture diagramming
- Interview readiness score with session history and trend tracking
- Company-specific question modes: Google, Meta, Amazon, Microsoft, Netflix, Uber, Airbnb, Stripe
- Trivia quiz mode for drilling system design fundamentals (Pro)
- Real-time feedback on trade-offs, scalability, consistency, and fault tolerance

## About

Built by Ayusch Jain, a software engineer with experience preparing for and conducting system design interviews at FAANG-tier companies. Mockingly was created to give engineers the same realistic feedback they'd get in a live interview, without the scheduling and cost overhead.