Interactive Engineering Knowledge

Visualize & Understand

Master algorithms, databases, messaging systems, and distributed architecture through interactive step-by-step visualizations.

5Categories
18Topics
84Visualizations

Data Structures & Algorithms

Master core CS fundamentals through interactive visualizations

Arrays & Strings

Prefix sums, sliding window, two pointers, and Kadane's algorithm

Prefix Sum & Kadane'sSliding WindowTwo Pointers
3/3

Linked Lists

Singly, doubly, and circular linked list operations

Singly Linked ListDoubly Linked List
2/2

Stack & Queue

LIFO/FIFO operations and monotonic patterns

Stack OperationsQueue OperationsMonotonic Stack
2/3

Trees

BST, AVL, traversals, and heap data structures

Binary Search TreeAVL TreeTree TraversalsHeap / Priority Queue
4/4

HashMap

Hash functions, collision handling, and common patterns

Hash BasicsCollision Handling
1/2
soon

Graph

BFS, DFS, shortest path, and topological sort

BFS & DFSDijkstra's Algorithm

Languages

Programming language fundamentals and runtime behavior

Golang

Concurrency, channels, memory model, and garbage collection

GoroutinesChannelsMemory ModelGC
5/5

Databases

Internals, query optimization, and architecture of modern databases

PostgreSQL

MVCC, indexing, query planner, WAL, and vacuum internals

MVCC & TransactionsIndexingIsolation LevelsQuery PlannerWAL & RecoveryVacuum & Bloat
6/9
soon

Redis

Data structures, persistence, pub/sub, and cluster mode

Data StructuresPersistencePub/Sub & StreamsCluster & Replication

Message Queues

Distributed messaging, event streaming, and async architectures

soon

Apache Pulsar

Multi-tenant messaging with tiered storage and geo-replication

ArchitectureSubscriptionsTiered Storage
soon

Kafka

Distributed event streaming with partitions and consumer groups

Partitions & OffsetsConsumer GroupsReplication

System Design

Distributed systems concepts, patterns, and trade-offs

Framework & Fundamentals

The repeatable approach and core building blocks behind most system design interviews.

System Design FrameworkNetworking EssentialsIntermediate System Design: The Decision FrameworkDesign a URL ShortenerDesign a Rate LimiterDesign a Key-Value StoreDesign a Unique ID GeneratorConsistent Hashing
9/9

Infrastructure

The platform layer: gateways, discovery, config, tracing, and secrets.

Content Delivery NetworksLoad BalancingDesign an API GatewayService DiscoveryDistributed Config SystemDistributed TracingSecrets ManagementAWS Solutions Architect Associate
9/9

Product Systems

Full product designs: search, video, ride-sharing, ads, and more.

Design a News FeedDesign a Payment SystemDesign a Web CrawlerDesign Instagram / Photo SharingDesign YouTube / Video PlatformDesign a Ride-Sharing PlatformDesign a Hotel/Flight Booking SystemDesign an Ad Click AggregatorDesign E-commerce Search
10/10

Storage & Databases

Data storage patterns from caches to object stores and analytics engines.

Design a Distributed CacheDesign Object StorageRelational Database Scaling

Messaging & Streaming

Async communication, event-driven architectures, and log-based systems.

Design a Message QueueDesign a Pub/Sub SystemDesign a Task Queue

Real-time & Communication

Low-latency systems for live collaboration, messaging, and synchronous communication.

Design a Chat SystemDesign a Notification SystemDesign Collaborative Editing

ML & Data Systems

End-to-end machine learning infrastructure and data platforms.

Design a Recommendation EngineDesign a Feature StoreDesign ML Serving/Inference

More topics and visualizations are being built. Stay tuned.