- Nov 30, 2025
A comprehensive learning path and technology index for system design interviews. Navigate from fundamentals to advanced topics with organized guides, technology trees, and sample designs.
System DesignLearning PathTutorialReference
- Nov 30, 2025
A comprehensive guide to Apache Cassandra, covering architecture, data modeling, replication, consistency, performance, use cases, and best practices for building highly scalable distributed systems.
CassandraDatabaseNoSQLDistributed SystemsSystem DesignBig DataTechnology
- Nov 30, 2025
A comprehensive guide to designing authentication and fraud detection systems for Roblox, covering user authentication, session management, multi-factor authentication, account security, bot detection, payment fraud prevention, content fraud detection, and...
System DesignInterview ExampleDistributed SystemsSecurityAuthenticationFraud DetectionGaming
- Nov 29, 2025
A comprehensive guide to WebSocket, covering protocol, connection management, message handling, scaling, and best practices for building real-time applications.
WebSocketReal-TimeWeb DevelopmentSystem DesignTechnologyNetworking
- Nov 29, 2025
A comprehensive guide to Terraform, covering infrastructure provisioning, state management, modules, and best practices for managing cloud infrastructure as code.
TerraformInfrastructure as CodeDevOpsCloudSystem DesignTechnology
- Nov 29, 2025
A quick reference guide to essential technologies used in system design interviews, organized by category with brief descriptions, use cases, and links to comprehensive guides.
TechnologySystem DesignQuick ReferenceInterview PreparationTechnology Comparison
- Nov 29, 2025
A comprehensive guide to RabbitMQ, covering message queues, exchanges, routing, pub/sub patterns, and best practices for building event-driven and decoupled distributed systems.
RabbitMQMessage QueueEvent-DrivenSystem DesignTechnologyMessaging
- Nov 29, 2025
A comprehensive guide to Prometheus, covering metrics collection, time-series database, query language (PromQL), alerting, and best practices for building observability systems.
PrometheusMonitoringMetricsObservabilitySystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to NGINX, covering web server, reverse proxy, load balancing, SSL termination, and best practices for building high-performance web applications and APIs.
NGINXWeb ServerReverse ProxyLoad BalancerSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Neo4j, covering graph data model, Cypher query language, relationships, traversal, and best practices for building graph-based applications.
Neo4jGraph DatabaseNoSQLSystem DesignTechnologyDatabase
- Nov 29, 2025
A comprehensive guide to MySQL, covering database architecture, storage engines, replication, sharding, performance optimization, and best practices for building scalable relational database systems.
MySQLDatabaseSQLSystem DesignTechnologyRelational Database
- Nov 29, 2025
A comprehensive guide to MongoDB, covering document model, sharding, replication, indexing, aggregation pipeline, and best practices for building scalable NoSQL database systems.
MongoDBNoSQLDocument DatabaseSystem DesignTechnologyDatabase
- Nov 29, 2025
A comprehensive guide to Memcached, covering distributed caching, key-value storage, cache invalidation, and best practices for improving application performance through in-memory caching.
MemcachedCachingPerformanceSystem DesignTechnologyIn-Memory
- Nov 29, 2025
A comprehensive guide to Load Balancers, covering algorithms, health checks, session persistence, SSL termination, and best practices for distributing traffic across multiple servers.
Load BalancerSystem DesignNetworkingHigh AvailabilityTechnologyArchitecture
- Nov 29, 2025
A comprehensive guide to Kubernetes, covering pods, services, deployments, scaling, and best practices for container orchestration and microservices deployment.
KubernetesContainer OrchestrationDevOpsSystem DesignTechnologyInfrastructure
- Nov 29, 2025
A comprehensive guide to InfluxDB, covering time-series data storage, retention policies, continuous queries, downsampling, and best practices for storing and querying time-series data.
InfluxDBTime-Series DatabaseIoTMonitoringSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache HBase, covering column-family storage, row keys, regions, HDFS integration, and best practices for building scalable NoSQL database systems.
HBaseNoSQLBig DataDatabaseSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to gRPC, covering protocol buffers, service definition, streaming, load balancing, and best practices for building high-performance microservices.
gRPCRPCMicroservicesSystem DesignTechnologyAPI
- Nov 29, 2025
A comprehensive guide to GraphQL, covering query language, schema design, resolvers, subscriptions, and best practices for building flexible and efficient APIs.
GraphQLAPI DesignWeb DevelopmentSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to etcd, covering distributed key-value storage, consensus algorithm (Raft), watch mechanism, leases, and best practices for building distributed coordination systems.
etcdDistributed SystemsKey-Value StoreCoordinationSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Elasticsearch, covering architecture, indexing, search, aggregation, scalability, and best practices for building search engines, log analytics, and real-time data exploration systems.
ElasticsearchSearch EngineDatabaseDistributed SystemsSystem DesignTechnologyAnalytics
- Nov 29, 2025
A comprehensive guide to Docker, covering containers, images, Dockerfile, orchestration, and best practices for building and deploying containerized applications.
DockerContainerizationDevOpsSystem DesignTechnologyInfrastructure
- Nov 29, 2025
A comprehensive guide to designing a to-do list application with multi-user collaboration, covering task lists, sharing, real-time synchronization, date/time reminders, notifications, and conflict resolution for collaborative task management.
System DesignInterview ExampleDistributed SystemsReal-time SystemsCollaboration
- Nov 29, 2025
A comprehensive guide to designing a resource loading system for a game engine that handles asset discovery, fetching from local packages and remote CDNs, processing operations (decryption, decompression), and efficient...
System DesignInterview ExampleGame EngineClient SystemsLow-Level DesignPerformance
- Nov 29, 2025
A comprehensive guide to designing a publish-subscribe messaging system with ephemeral delivery, low-latency fan-out, topic routing, connection management, and horizontal scaling. Messages are intentionally lost if no subscribers are listening....
System DesignInterview ExampleDistributed SystemsReal-time SystemsMessaging
- Nov 29, 2025
A comprehensive guide to designing a matchmaking service for multiplayer games that handles skill-based matching, team formation, server allocation, and real-time coordination at scale. Covers queue partitioning, atomic reservations, multi-step...
System DesignInterview ExampleDistributed SystemsGamingReal-time SystemsHigh-Throughput Systems
- Nov 29, 2025
A comprehensive guide to designing a like/unlike feature system that handles high read traffic (1M QPS) and significant write traffic (100k QPS) while maintaining data consistency. Covers counter management, caching...
System DesignInterview ExampleDistributed SystemsSocial MediaHigh-Throughput Systems
- Nov 29, 2025
A comprehensive guide to designing a delayed payment scheduler service that handles scheduled virtual currency transfers with durable timers, idempotent execution, account contention handling, and scalability to millions of pending...
System DesignInterview ExampleDistributed SystemsFinancial SystemsSchedulingHigh-Throughput Systems
- Nov 29, 2025
A comprehensive guide to designing a Change Data Capture (CDC) system that captures database changes in real-time, streams them to downstream systems, and enables data replication, event-driven architectures, and real-time...
System DesignInterview ExampleDistributed SystemsData EngineeringEvent StreamingDatabase Replication
- Nov 29, 2025
A comprehensive guide to HashiCorp Consul, covering service discovery, health checking, key-value storage, multi-datacenter deployment, and best practices for building distributed systems.
ConsulService DiscoveryConfiguration ManagementDistributed SystemsSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to ClickHouse, covering columnar storage, materialized views, distributed queries, and best practices for building high-performance analytics systems.
ClickHouseAnalytics DatabaseOLAPColumn-OrientedSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Content Delivery Networks (CDN), covering architecture, caching strategies, edge computing, performance optimization, and best practices for delivering content globally with low latency and high availability.
CDNContent DeliveryDistributed SystemsSystem DesignTechnologyPerformanceCloud
- Nov 29, 2025
A comprehensive guide to CAP Theorem, covering the fundamental trade-offs in distributed systems between Consistency, Availability, and Partition Tolerance. Includes practical examples, real-world applications, and how to apply CAP Theorem...
CAP TheoremDistributed SystemsSystem DesignArchitectureTechnologyTheory
- Nov 29, 2025
A comprehensive guide to Apache Zookeeper, covering distributed coordination, consensus algorithms, leader election, configuration management, and best practices for building distributed systems that require coordination and synchronization.
Apache ZookeeperDistributed SystemsCoordinationSystem DesignTechnologyConsensus
- Nov 29, 2025
A comprehensive guide to Apache Thrift, covering IDL, code generation, service definition, and best practices for building cross-language RPC services.
Apache ThriftRPCCross-LanguageMicroservicesSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Storm, covering topologies, spouts, bolts, stream grouping, and best practices for building real-time stream processing applications.
Apache StormStream ProcessingReal-TimeDistributed SystemsSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Spark, covering distributed computing, RDDs, DataFrames, streaming, machine learning, and best practices for processing large-scale data.
Apache SparkBig DataData ProcessingAnalyticsSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Samza, covering stream processing, stateful processing, fault tolerance, and best practices for building scalable stream processing applications.
Apache SamzaStream ProcessingKafkaDistributed SystemsSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Pulsar, covering pub/sub messaging, multi-tenancy, geo-replication, tiered storage, and best practices for building scalable messaging and streaming systems.
Apache PulsarMessagingStreamingDistributed SystemsSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Pinot, covering real-time ingestion, columnar storage, star-tree indexing, and best practices for building low-latency analytics systems.
Apache PinotOLAPReal-Time AnalyticsColumn-OrientedSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Phoenix, covering SQL interface for HBase, secondary indexes, transactions, and best practices for building SQL-based applications on HBase.
Apache PhoenixSQLHBaseNoSQLSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Parquet, covering columnar storage, compression, schema evolution, and best practices for efficient data storage and analytics.
Apache ParquetColumnar StorageData FormatBig DataSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache NiFi, covering data flow design, processors, flowfiles, and best practices for building data integration and ETL pipelines.
Apache NiFiData FlowETLData IntegrationSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Ignite, covering in-memory data grid, distributed caching, compute grid, and best practices for building high-performance in-memory applications.
Apache IgniteIn-Memory ComputingDistributed CacheGrid ComputingSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Hive, covering SQL on Hadoop, data warehousing, partitioning, bucketing, and best practices for building data warehouse systems on Hadoop.
Apache HiveData WarehouseSQLBig DataSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Flink, covering stream processing, event time processing, state management, windowing, and best practices for building real-time analytics, event-driven applications, and data pipelines.
Apache FlinkStream ProcessingReal-Time SystemsDistributed SystemsSystem DesignTechnologyAnalytics
- Nov 29, 2025
A comprehensive guide to Apache Druid, covering real-time ingestion, columnar storage, time-based partitioning, and best practices for building high-performance analytics systems.
Apache DruidAnalytics DatabaseReal-TimeOLAPSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Beam, covering unified programming model, batch and stream processing, runners, and best practices for building portable data processing pipelines.
Apache BeamData ProcessingBatch ProcessingStream ProcessingSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Avro, covering schema definition, serialization, schema evolution, and best practices for efficient data serialization in distributed systems.
Apache AvroData SerializationSchema EvolutionBig DataSystem DesignTechnology
- Nov 29, 2025
A comprehensive guide to Apache Airflow, covering DAGs, tasks, operators, scheduling, and best practices for building and managing data pipelines and workflows.
Apache AirflowWorkflow OrchestrationData PipelineETLSystem DesignTechnology
- Nov 24, 2025
A comprehensive guide to designing a URL shortener focusing on data modeling, storage choice, hashing/encoding, uniqueness constraints, caching, and API design. Interview question emphasizing data structures and algorithms rather than...
System DesignInterview ExampleData ModelingHashingAlgorithms
- Nov 24, 2025
A comprehensive guide to designing a ticket booking system focusing on class design, state management, handling atomicity locally (like seat reservation), and booking logic. Interview question emphasizing consistency and correctness...
System DesignInterview ExampleClass DesignState ManagementAtomicity
- Nov 24, 2025
A comprehensive guide to designing a thread pool system, covering thread pool architecture, task queue management, thread lifecycle, load balancing, graceful shutdown, and concurrency patterns. Essential for system design interviews...
System DesignInterview ExampleConcurrencyThreadingNon-Distributed SystemsOperating Systems
- Nov 24, 2025
A comprehensive guide to designing a text editor focusing on data structures (rope, gap buffer), command handling, undo/redo logic, and memory-efficient design. Interview question emphasizing algorithmic and memory-efficient design, not...
System DesignInterview ExampleData StructuresAlgorithmsMemory Efficiency
- Nov 24, 2025
A comprehensive guide to designing a single-machine task scheduler, covering task queuing, priority scheduling, scheduling algorithms, task dependencies, retry mechanisms, and resource management. Essential for system design interviews focusing on...
System DesignInterview ExampleTask SchedulingNon-Distributed SystemsOperating Systems
- Nov 24, 2025
A comprehensive guide to designing a local social media feed focusing on data modeling, sorting/filtering, and local caching. Interview question emphasizing basic feed generation without distributed concerns like sharding.
System DesignInterview ExampleData ModelingSortingLocal Caching
- Nov 24, 2025
A comprehensive guide to designing a simple chat application focusing on object-oriented modeling, message queues (local), persistence, and read/unread state. Interview question emphasizing data structures and correct modeling of user...
System DesignInterview ExampleObject-Oriented ModelingMessage QueuesPersistence
- Nov 24, 2025
A comprehensive guide to designing a producer-consumer queue, covering bounded/unbounded queues, blocking/non-blocking operations, multiple producers and consumers, backpressure handling, and thread synchronization.
System DesignInterview ExampleConcurrencyNon-Distributed SystemsQueue Systems
- Nov 24, 2025
A comprehensive guide to designing a parking lot system focusing on object-oriented design, class hierarchy, state management, and edge case handling. Interview question emphasizing modeling real-world entities and managing rules...
System DesignInterview ExampleObject-Oriented DesignState Management
- Nov 24, 2025
A comprehensive guide to designing an online shopping cart focusing on object-oriented design, entity relationships, session management, and state handling. Interview question emphasizing handling state, operations, and edge cases rather...
System DesignInterview ExampleObject-Oriented DesignEntity RelationshipsSession Management
- Nov 24, 2025
A comprehensive guide to designing a memory allocator, covering allocation strategies, free list management, fragmentation handling, alignment, and memory pool design. Essential for system design interviews focusing on memory management...
System DesignInterview ExampleMemory ManagementNon-Distributed SystemsOperating Systems
- Nov 24, 2025
A comprehensive guide to designing a local logging system, covering log levels, formatting, rotation, async logging, buffering, and performance optimization for high-throughput logging scenarios.
System DesignInterview ExampleLoggingNon-Distributed SystemsI/O Systems
- Nov 24, 2025
A comprehensive guide to designing a library management system focusing on relational modeling, object-oriented design, and inventory management. Interview question checking ability to design CRUD-heavy systems with realistic constraints.
System DesignInterview ExampleRelational ModelingObject-Oriented DesignInventory Management
- Nov 24, 2025
A comprehensive guide to designing an in-memory gaming platform with matchmaking queues, covering player level management, queue system design, game session creation, concurrency handling, and low-level code implementation. This is...
System DesignInterview ExampleLow-Level DesignIn-Memory SystemsGamingMatchmakingQueue ManagementConcurrency
- Nov 24, 2025
A comprehensive guide to designing a file system and in-memory storage system, covering data structures, storage organization, metadata management, caching strategies, concurrency control, durability, and scalability. Essential for system design...
System DesignInterview ExampleStorage SystemsFile SystemsOperating SystemsDistributed Systems
- Nov 24, 2025
A comprehensive guide to designing a connection pool for managing database, HTTP, or socket connections, covering pool initialization, connection lifecycle, health checking, timeout handling, and resource management.
System DesignInterview ExampleResource ManagementNon-Distributed SystemsDatabase Systems
- Nov 24, 2025
A comprehensive guide to designing a circular buffer (ring buffer), covering fixed-size buffer implementation, producer-consumer synchronization, wraparound handling, and lock-free implementations.
System DesignInterview ExampleData StructuresNon-Distributed SystemsBuffer Systems
- Nov 24, 2025
A comprehensive guide to designing an ATM machine and banking system focusing on state management, transactions, handling concurrency locally, and error handling. Interview question emphasizing correct modeling and ensuring data...
System DesignInterview ExampleState ManagementTransactionsConcurrency
- Nov 24, 2025
A comprehensive list of common non-distributed system design interview questions that focus on single-machine systems, local storage, concurrency, memory management, and operating system components. Essential for interviews focusing on low-level...
System DesignInterview QuestionsNon-Distributed SystemsLocal SystemsSingle-Machine SystemsOperating Systems
- Nov 24, 2025
A comprehensive guide to common domain system design patterns, covering engineering culture, technology stack, design principles, common patterns, scale considerations, and interview approaches. Essential reading for system design interviews.
System DesignInterview PreparationDomain DesignSystem ArchitectureDesign Patterns
- Nov 20, 2025
A comprehensive guide comparing distributed system design and product system design, covering their key differences, focus areas, interview approaches, common patterns, and when to use each approach in system design...
System DesignInterview PreparationDistributed SystemsProduct DesignSystem ArchitectureInterview Strategy
- Nov 20, 2025
A comprehensive guide to designing a social media feed like Twitter, covering feed generation strategies (push vs pull), timeline generation, real-time updates, tweet storage, follow/unfollow system, like/retweet mechanisms, search functionality,...
System DesignInterview ExampleDistributed SystemsReal-Time SystemsSocial MediaFeed Generation
- Nov 20, 2025
A comprehensive guide to designing a ride-sharing service like Uber, covering real-time matching, location tracking, dynamic pricing, payment processing, driver-rider coordination, and architectural patterns for handling millions of rides, real-time...
System DesignInterview ExampleDistributed SystemsReal-Time SystemsGeospatial SystemsMicroservices
- Nov 17, 2025
A comprehensive reference guide covering all major technologies, options, and trade-offs for system design interviews, including databases, caching, message queues, search engines, CDNs, load balancers, storage systems, and stream processing...
System DesignInterview PreparationDistributed SystemsTechnologiesTrade-offsReference Guide
- Nov 17, 2025
A comprehensive guide to using Kubernetes (K8s) in system design interviews, covering key concepts, common scenarios, deployment patterns, scaling strategies, and how to incorporate K8s into your system design solutions....
System DesignInterview PreparationKubernetesContainer OrchestrationDevOpsDistributed SystemsMicroservices
- Nov 17, 2025
A comprehensive guide to designing Quickset with UEI integration, a smart home platform connecting Quickset TV mounts with UEI remote controls and smart devices, covering IoT device management, real-time control,...
System DesignInterview ExampleIoTSmart HomeDevice ManagementReal-time SystemsHome Automation
- Nov 17, 2025
A comprehensive guide to designing a distributed logging system that masks PII (Personally Identifiable Information), supports top-k exception queries, and enables fast multi-field queries, covering log ingestion, storage, indexing, PII...
System DesignInterview ExampleDistributed SystemsLoggingData PrivacyObservabilitySearch SystemsStream Processing
- Nov 16, 2025
A comprehensive guide to designing Roblox, a user-generated content platform for games and experiences, covering real-time multiplayer, 3D rendering, creator tools, social features, monetization, content moderation, and architectural patterns for...
System DesignInterview ExampleDistributed SystemsGamingUser-Generated ContentReal-time SystemsSocial Media
- Nov 16, 2025
A comprehensive guide to designing Roblox Studio, the creator tool for building Roblox experiences, covering IDE architecture, real-time collaboration (Team Create), asset management, version control, plugin system, and architectural patterns...
System DesignInterview ExampleDistributed SystemsDeveloper ToolsIDEReal-time CollaborationGame Development
- Nov 14, 2025
A comprehensive guide to designing YouTube, covering video upload, processing, adaptive bitrate streaming, storage, recommendations, comments, search, and architectural patterns for handling billions of videos, petabytes of storage, and millions...
System DesignInterview ExampleDistributed SystemsVideo StreamingSocial Media
- Nov 14, 2025
A comprehensive guide to designing a top K heavy hitter system for finding the most frequent items in a data stream, covering Count-Min Sketch, Space-Saving algorithm, distributed counting, and architectural...
System DesignInterview ExampleDistributed SystemsStreaming SystemsAlgorithms
- Nov 14, 2025
A comprehensive guide to designing Ticketmaster, covering ticket booking, seat selection, concurrent booking prevention, payment processing, event management, and architectural patterns for handling millions of concurrent users competing for limited...
System DesignInterview ExampleDistributed SystemsE-commerce
- Nov 14, 2025
A comprehensive guide to designing a search autocomplete system like Google's search suggestions, covering Trie data structures, caching strategies, ranking algorithms, real-time updates, and architectural patterns for handling millions of...
System DesignInterview ExampleDistributed SystemsSearch Systems
- Nov 14, 2025
A comprehensive guide to designing a proximity service like Yelp, covering location-based search, business discovery, geospatial queries, reviews and ratings, recommendation algorithms, and architectural patterns for handling millions of businesses...
System DesignInterview ExampleDistributed SystemsLocation-Based Services
- Nov 14, 2025
A comprehensive guide to designing a price drop tracker system like CamelCamelCamel or Honey, covering web scraping, price monitoring, notification delivery, user tracking preferences, and architectural patterns for tracking millions...
System DesignInterview ExampleDistributed SystemsE-commerceWeb ScrapingReal-time Systems
- Nov 14, 2025
A comprehensive guide to designing Netflix, covering video streaming, CDN distribution, adaptive bitrate streaming, content recommendation, user profiles, content management, and architectural patterns for handling petabytes of video content and...
System DesignInterview ExampleDistributed SystemsVideo StreamingContent Delivery
- Nov 14, 2025
A comprehensive guide to designing a key-value store optimized for a local system (2TB disk, 8 CPU, 32GB RAM) and scaling it horizontally across multiple nodes, covering storage architecture, indexing...
System DesignInterview ExampleDistributed SystemsStorage SystemsDatabase DesignDistributed Databases
- Nov 14, 2025
A comprehensive guide to designing a hotel reservation system like Booking.com or Expedia, covering hotel search, room availability, booking management, dynamic pricing, payment processing, and architectural patterns for handling millions...
System DesignInterview ExampleDistributed SystemsE-commerce
- Nov 14, 2025
A comprehensive guide to designing a global translation service with hybrid mode that works offline using local translation models and switches to remote server translation when online, covering offline-first architecture,...
System DesignInterview ExampleDistributed SystemsMobile ApplicationsOffline-FirstMachine LearningEdge Computing
- Nov 14, 2025
A comprehensive guide to designing a file storage and synchronization system like Dropbox or Google Drive, covering file upload/download, multi-device sync, conflict resolution, delta sync, versioning, sharing, and architectural patterns...
System DesignInterview ExampleDistributed SystemsStorage Systems
- Nov 14, 2025
A comprehensive guide to designing Facebook Live streaming with real-time comments, covering live video streaming, real-time comment delivery, engagement tracking, and architectural patterns for handling millions of concurrent viewers and...
System DesignInterview ExampleDistributed SystemsReal-time SystemsVideo StreamingSocial Media
- Nov 14, 2025
A comprehensive guide to designing an embedded local Redis cache system for microservices, covering local cache architecture, Redis integration patterns, cache synchronization, data consistency, and architectural patterns for achieving sub-millisecond...
System DesignInterview ExampleDistributed SystemsCachingRedisMicroservicesPerformance Optimization
- Nov 14, 2025
A comprehensive guide to designing a distributed web crawler system using 10,000 distributed nodes, covering command and control architecture, load distribution, fault tolerance, stealth mechanisms, and architectural patterns for large-scale...
System DesignInterview ExampleDistributed SystemsWeb CrawlingEdge Computing
- Nov 14, 2025
A comprehensive guide to designing a centralized configuration service with LRU cache that distributes configuration data to multiple microservices, covering configuration management, caching strategies, change propagation, versioning, and architectural patterns...
System DesignInterview ExampleDistributed SystemsCachingMicroservicesConfiguration Management
- Nov 14, 2025
A comprehensive guide to designing a chess game system that supports unlimited undo moves and ELO rating calculation, covering game state management, move history, undo functionality, ELO rating system, real-time...
System DesignInterview ExampleDistributed SystemsGamingReal-time SystemsRating Systems
- Nov 14, 2025
A comprehensive guide to designing a chat system like Messenger or WhatsApp, covering real-time messaging, message delivery guarantees, presence management, group chats, media sharing, scalability challenges, and architectural patterns for...
System DesignInterview ExampleDistributed SystemsReal-time SystemsSocial Media
- Nov 14, 2025
A comprehensive guide to designing CamelCamelCamel, a price tracking service for Amazon products, covering historical price tracking, price drop alerts, browser extensions, price charts, ASIN-based tracking, and architectural patterns for...
System DesignInterview ExampleDistributed SystemsE-commerceWeb ScrapingReal-time SystemsAnalytics
- Nov 14, 2025
A comprehensive guide to designing an auction system like eBay, covering bid management, real-time bid updates, auction lifecycle, winner determination, payment processing, and architectural patterns for handling millions of concurrent...
System DesignInterview ExampleDistributed SystemsE-commerceReal-time Systems
- Nov 13, 2025
A comprehensive guide to practicing system design problems, covering top practice platforms, curated problem lists, preparation strategies, and resources for mastering system design interviews.
Interview PreparationSystem DesignStudy GuidePractice
- Nov 13, 2025
A practical guide to Redis, covering use cases, deployment strategies, best practices, and code examples for building high-performance applications with caching, sessions, and real-time features.
RedisCachingDatabaseTutorialUse CasesDeploymentIn-MemoryTechnology
- Nov 13, 2025
A comprehensive guide to designing a scalable web crawler system, covering architecture, politeness policies, fault tolerance, and efficient crawling strategies for indexing billions of web pages.
System DesignInterview ExampleDistributed SystemsWeb Crawling
- Nov 13, 2025
A comprehensive guide to designing a real-time game leaderboard system, covering score updates, ranking algorithms, multiple leaderboard types, high write throughput, low latency reads, and scalability challenges for handling millions...
System DesignInterview ExampleDistributed SystemsGaming
- Nov 13, 2025
A comprehensive guide to designing a news feed system, covering feed generation strategies (push/pull/hybrid), ranking algorithms, real-time updates, scalability challenges, and architectural patterns for handling billions of users and millions...
System DesignInterview ExampleDistributed SystemsSocial Media
- Nov 13, 2025
A comprehensive guide to designing Instagram, covering photo/video upload, feed generation, user relationships, scalability challenges, and architectural patterns for handling billions of users and petabytes of media content.
System DesignInterview ExampleDistributed SystemsSocial Media
- Nov 13, 2025
A comprehensive guide to Dead Letter Queues (DLQ), covering concepts, use cases, implementation patterns, and best practices for handling failed messages in distributed systems.
Message QueueDLQError HandlingSystem DesignTutorialBest PracticesTechnology
- Nov 13, 2025
A comprehensive guide to Apache Kafka, covering core concepts, use cases, deployment strategies, best practices, and practical examples for building real-time streaming applications.
Apache KafkaMessage QueueStreamingTutorialUse CasesDeploymentDistributed SystemsTechnology
- Nov 13, 2025
A comprehensive guide to Amazon SQS (Simple Queue Service), covering queue types, use cases, deployment strategies, best practices, and practical examples for building decoupled, scalable applications.
AWSMessage QueueSQSTutorialUse CasesDeploymentDistributed SystemsTechnology
- Nov 13, 2025
A comprehensive guide to Amazon S3 storage, covering use cases, deployment strategies, best practices, and practical examples for building scalable applications.
AWSCloud StorageS3TutorialUse CasesDeploymentTechnology
- Nov 9, 2025
A comprehensive guide to TimescaleDB, covering architecture, hypertables, continuous aggregates, compression, data retention, use cases, and best practices for building scalable time-series applications.
TimescaleDBDatabaseTime-SeriesPostgreSQLSystem DesignIoTAnalyticsTechnology
- Nov 9, 2025
A comprehensive guide to PostgreSQL, covering architecture, advanced features, data types, performance optimization, replication, use cases, and best practices for building robust relational database systems.
PostgreSQLDatabaseSQLRelational DatabaseSystem DesignACIDTechnology
- Nov 9, 2025
Comprehensive guide to OS Frameworks domain design interview, including interview format, key evaluation areas, common topics, and detailed sample questions with answers.
Interview PreparationSystem DesignOS Frameworks
- Nov 9, 2025
A comprehensive system design for smart glasses featuring voice-controlled automatic video generation, covering current smart glass architecture and the new feature to generate 2-minute memory videos from natural language commands....
System DesignAR GlassARVoice ControlVideo ProcessingAI/MLArchitecture
- Nov 9, 2025
A comprehensive system design for building an NDK (Native Development Kit) system that can merge multiple .so (shared object) libraries, covering architecture, dependency resolution, symbol management, build integration, and best...
System DesignAndroidNDKNative LibrariesBuild SystemsC/C++
- Nov 9, 2025
A comprehensive system design for building a blob storage system like Amazon S3, covering architecture, data durability, replication, scalability, API design, and key design decisions for petabyte-scale object storage.
System DesignDistributed SystemsStorageObject StorageS3Architecture
- Nov 9, 2025
Comprehensive guide to common technologies used in system design interviews, including detailed pros/cons comparisons for databases, caching, message queues, load balancers, CDNs, search engines, and more.
System DesignInterview PreparationTechnology ComparisonArchitectureTechnology
- Nov 9, 2025
A comprehensive guide to Apache Cassandra, covering architecture, data modeling, replication, consistency, performance, use cases, and best practices for building highly scalable distributed systems.
CassandraDatabaseNoSQLDistributed SystemsSystem DesignBig DataTechnology
- Nov 9, 2025
A comprehensive guide to Amazon DynamoDB, covering architecture, data modeling, partition keys, indexes, consistency, performance, use cases, and best practices for building highly scalable cloud-native applications.
DynamoDBAWSDatabaseNoSQLDistributed SystemsSystem DesignCloudTechnology
- Nov 8, 2025
A comprehensive comparison of SQL and NoSQL databases, covering common options, runtime analysis, read/write optimization, size limitations, and real-world scenarios.
DatabaseSystem DesignSQLNoSQLArchitecture
- Nov 8, 2025
A comprehensive guide to understanding how SQL databases maintain read and write consistency, covering ACID properties, transaction isolation levels, concurrency control mechanisms, and real-world examples.
DatabaseSQLACIDTransactionsConsistencySystem Design
- Nov 8, 2025
A comprehensive guide to Redis, covering architecture, data structures, features, use cases, performance characteristics, configuration, and best practices for building scalable systems.
RedisDatabaseCachingSystem DesignIn-MemoryNoSQLTechnology
- Nov 8, 2025
A comprehensive comparison of message queue architectures, comparing log-based queues (Kafka) vs in-memory queues (Redis), including detailed analysis of common options, runtime characteristics, size limitations, and real-world scenarios.
Message QueueSystem DesignKafkaRedisRabbitMQArchitecture
- Nov 8, 2025
A comprehensive system design for smart glasses that enables voice-controlled photo/video capture and automatic memory video creation using natural language queries, covering read-heavy search vs write-heavy video processing architecture.
System DesignSmart GlassVideo ProcessingNLPArchitectureCQRS
- Nov 5, 2025
A concise, actionable guide on what to study for thread safety knowledge, organized by priority and with specific resources for each topic, tailored for OS Frameworks design interviews.
Study GuideThread SafetyConcurrencyQuick ReferenceInterview Preparation
- Nov 5, 2025
A concise, actionable guide on what to study for security awareness, organized by priority and with specific resources for each topic, tailored for OS Frameworks design interviews.
Study GuideSecurityQuick ReferenceInterview Preparation
- Nov 5, 2025
A concise, actionable guide on what to study for performance optimization skills, organized by priority and with specific resources for each topic, tailored for OS Frameworks design interviews.
Study GuidePerformance OptimizationQuick ReferenceInterview Preparation
- Nov 5, 2025
A comprehensive study guide for mastering performance optimization skills required for OS Frameworks design interviews, covering CPU, memory, I/O, algorithm, concurrency, and system-level optimization techniques.
Study GuidePerformance OptimizationInterview PreparationOS Frameworks
- Nov 5, 2025
A comprehensive preparation guide for Meta Software Engineer - OS Frameworks interviews, including study strategy, key topics, practice plan, and interview tips.
Interview PreparationOS FrameworksStudy Guide
- Nov 5, 2025
A focused 7-day preparation todo list for Meta OS/Frameworks interviews, emphasizing OS/middleware concepts, IPC, threading models, memory management, and platform-agnostic design.
Interview PreparationOS FrameworksStudy PlanTodo List
- Nov 5, 2025
An intensive 10-day drill plan for Meta OS/Frameworks interviews, covering Android frameworks, Linux drivers, JNI, concurrency, IPC, system design, and mock interviews.
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A concise, actionable guide on what to study for deep understanding of OS internals, organized by priority and with specific resources for each topic.
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A comprehensive study guide for mastering OS internals required for OS Frameworks design interviews, covering process management, memory management, file systems, I/O, and more.
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A comprehensive guide to OS Frameworks design interviews at Meta, Google, and Apple, covering common topics, evaluation criteria, answer structure, and a complete example walkthrough.
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A comprehensive list of local OS Frameworks system design interview questions that focus on on-device systems without cloud or distributed architecture dependencies.
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A detailed walkthrough of designing a system for Meta Glass smart glasses, including real-time processing, AI/ML integration, cloud sync, edge computing, and low-power constraints.
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A detailed walkthrough of designing an embedded report event system for tracking, processing, and generating reports from user events in real-time and batch modes.
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A detailed walkthrough of designing a client-side embedded report events system in C++, including native SDK implementation, event tracking, embedded widgets, platform-specific optimization, and client-side processing.
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A comprehensive list of common Meta Senior Software Engineer system design interview questions, organized by category and frequency for quick reference and practice.
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A comprehensive checklist and detailed preparation guide for Meta's Software Engineer - OS Frameworks in-domain system design interview, covering all key topics, practice areas, and preparation strategies.
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A comprehensive list of common Meta OS Frameworks system design interview questions, organized by category for quick reference and practice.
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A comprehensive list of common system design interview questions for Senior Backend Software Engineer positions, focusing on backend systems, trading infrastructure, and fintech-specific challenges.
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A comprehensive list of common Android and native system design interview questions for Meta Senior Software Engineer positions, covering Android architecture, native code, and system-level design.
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A curated list of essential resources for learning system design and preparing for system design interviews.
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Complete guide to system design and architecture interviews, including interview format, common topics, fintech-specific considerations, and preparation strategies.
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Complete preparation guide for Meta's SpecSWE System Design and Product Architecture interviews, including evaluation criteria, interview format, and preparation strategies.
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A comprehensive guide to Meta's system design interviews, including common topics, interview format, and preparation resources.
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Complete guide to Meta's In-Domain Design interview format, evaluation criteria, and preparation strategies for specialized engineering roles.
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A comprehensive breakdown of Martin Kleppmann's 'Designing Data-Intensive Applications', covering all chapters, key concepts, and practical applications for system design.
Book ReviewSystem DesignDistributed SystemsData Systems
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A detailed walkthrough of designing a JNI bridge for efficient data transfer, memory management, error handling, performance optimization, and thread safety between Java and native code.
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A detailed walkthrough of designing a distributed job scheduler system, including architecture, technology choices, scalability, and reliability considerations.
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System Design: Metrics & Logging Pipeline
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System Design: Notification/Push Service
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System Design: Chat/Messaging
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System Design: Distributed Rate Limiter
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System Design: URL Shortener
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Android OS Design Overview: IoT Device Controller
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System Design Overview: Embedded Architectures
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System Design Overview: Cloud-Native Architectures
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System Design: ChatGPT-Style LLM Service (Serving, Caching, Safety)
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System Design: GitHub (Repos, Git Storage, PRs, CI)
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System Design: YouTube (Upload, Transcode, CDN, Recommendations)
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System Design: Twitter (Timeline, Fanout, Search, Trends)
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System Design: Robinhood-Style Retail Trading Platform
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System Design: Meta Glass (Smart Glasses Platform)
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System Design Interview Framework: A Structured Approach
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System Design: Client to API Gateway Connection Options
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