Low Level Design: Social Graph Service
4 min read What Is a Social Graph Service? A social graph service models relationships between users on a platform. These relationships can […] Read article
System Design
System Design
Low Level Design: Write-Through Cache
4 min read What Is Write-Through Cache? Write-through caching is a strategy where every write to the cache is synchronously propagated to the Read article
System Design
Low Level Design: ETL Service
4 min read What Is an ETL Service? Extract, Transform, Load (ETL) is the classic pattern for moving data from operational systems into Read article
System Design
Low Level Design: Billing System
5 min read What Is a Billing System? A billing system manages the full revenue lifecycle: creating subscription plans, tracking usage, generating invoices, Read article
System Design
Low Level Design: Content-Based Filtering Service
5 min read What Is Content-Based Filtering? Content-based filtering recommends items similar to those a user has already engaged with, based on the Read article
System Design
Low Level Design: Image Processing Service
4 min read What Is an Image Processing Service? An image processing service accepts raw image uploads, applies a configurable set of transformations Read article
System Design
Low Level Design: Thumbnail Generator Service
5 min read What Is a Thumbnail Generator Service? A thumbnail generator service automatically produces small preview images from source assets — videos, Read article
System Design
Low Level Design: Content Delivery Network (CDN)
5 min read What Is a Content Delivery Network? A Content Delivery Network (CDN) is a geographically distributed system of proxy servers and Read article
System Design
Low Level Design: Edge Cache Service
5 min read What Is an Edge Cache Service? An Edge Cache Service is a low-latency, high-throughput caching layer deployed at the network Read article
System Design
Low Level Design: Token Refresh Service
4 min read What Is a Token Refresh Service? A Token Refresh Service manages the lifecycle of short-lived access tokens and long-lived refresh Read article
System Design
Low Level Design: Experiment Framework
6 min read What Is an Experiment Framework? An Experiment Framework is the foundational infrastructure layer that enables product teams to run controlled Read article
System Design
Low Level Design: Distributed Transaction Manager
4 min read What Is a Distributed Transaction Manager? A Distributed Transaction Manager (DTM) coordinates operations that span multiple databases, services, or nodes Read article
System Design
Low Level Design: Reverse Proxy
3 min read Core Functions A reverse proxy sits between clients and upstream servers, providing: TLS termination, request routing, upstream connection pooling, response Read article
System Design
Low Level Design: Peer-to-Peer Network
3 min read P2P Architecture Types Two main architectures: unstructured (Gnutella) uses flood queries to locate content; structured (Kademlia DHT) provides O(log N) Read article
System Design
Low Level Design: Column Store Database
3 min read Column Storage Basics In a column store, each column is stored separately on disk. This enables: Reading only the columns Read article