5 min read Rails Interview Questions Overview Ruby on Rails powers Shopify, GitHub (partially), Airbnb, and many startups. Senior Rails interviews test deep […] Read article
10 min read Why Zero-Downtime Deployments Planned downtime windows are increasingly unacceptable — global users span every time zone, and even brief outages […] Read article
9 min read What Is Serverless? Serverless (Function-as-a-Service / FaaS) lets you deploy individual functions without managing servers. AWS Lambda, Google Cloud Functions, […] Read article
10 min read What Is Event Sourcing? Traditional systems store the current state of data (the latest balance in a bank account, the […] Read article
10 min read What Is a Multi-Tenant Architecture? Multi-tenancy means a single instance of a software application serves multiple customers (tenants), with each […] Read article
8 min read Payment fraud costs $32 billion annually. Every payment processor, bank, and marketplace needs a fraud detection system that identifies fraudulent […] Read article
8 min read Graph problems appear in every serious technical interview. They cover a wide range of difficulty — from simple BFS/DFS traversal […] Read article
8 min read Backtracking is systematic trial and error — explore a decision tree, and when you reach a dead end, undo the […] Read article
9 min read A distributed task queue decouples work production from work execution. Instead of processing a request synchronously (blocking the HTTP response), […] Read article
8 min read What Is a Data Pipeline? A data pipeline moves and transforms data from source systems (databases, APIs, event streams) to […] Read article