System Design Interview: Zero-Downtime Deployments
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
System Design
Algorithms
Interval and Greedy Interview Patterns: Meeting Rooms, Job Scheduling, and Activity Selection
6 min read Why Greedy and Interval Problems Greedy algorithms appear frequently in FAANG interviews because they test whether you can identify when Read article
System Design
System Design Interview: GraphQL API at Scale
9 min read Why GraphQL for Large APIs GraphQL solves two fundamental REST API problems: over-fetching (the response includes fields the client doesn’t Read article
System Design
System Design Interview: Serverless Architecture and Function-as-a-Service
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
Algorithms
Segment Tree and Fenwick Tree: Range Query Interview Patterns
5 min read When to Use Range Query Data Structures Range query problems appear frequently in senior engineering interviews and competitive programming: “find Read article
System Design
System Design Interview: Event Sourcing and CQRS
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
System Design
System Design Interview: Machine Learning Training Infrastructure
10 min read Why ML Training Infrastructure Is a System Design Interview Topic Companies building AI products at scale — OpenAI, Google, Meta, Read article
System Design
System Design Interview: Database Replication and High Availability
9 min read Why Database Replication? A single database server is a single point of failure. Replication copies data from a primary (write) Read article
Algorithms
Swift and iOS Interview Questions (2025)
9 min read Swift Interview Questions Overview iOS engineering roles at Apple, Airbnb, Uber, and fintech companies require deep Swift knowledge. Interviewers test Read article
System Design
System Design: Gaming Leaderboard at Scale
6 min read System Design: Gaming Leaderboard at Scale Designing a leaderboard is a popular system design question at gaming companies (Roblox, Riot Read article
System Design
SQL Interview Questions (2026): Window Functions, Optimization, and Advanced Queries
7 min read SQL Interview Questions (2026): Window Functions, Optimization, and Advanced Queries SQL is tested in virtually every technical interview — data Read article
System Design
Behavioral Interview Questions (2026): STAR Method, Amazon Leadership Principles, and Winning Answers
6 min read Behavioral Interview Questions (2026): STAR Method, FAANG Frameworks, and Winning Answers Behavioral interviews determine whether you get an offer at Read article
System Design
System Design: TikTok / Short-Form Video Platform
5 min read System Design: TikTok / Short-Form Video Platform TikTok has over 1.5 billion monthly active users who collectively watch 1 trillion Read article
Company Guides
HubSpot Interview Guide 2026: CRM Engineering, Marketing Automation, and Multi-Tenant SaaS
7 min read HubSpot Interview Guide 2026: CRM Engineering, Marketing Automation, and SaaS Platform Scale HubSpot is the leading CRM platform for small-to-medium Read article
Company Guides
Plaid Interview Guide 2026: Fintech Infrastructure, Transaction Categorization, and Open Banking
6 min read Plaid Interview Guide 2026: Fintech Infrastructure, Financial Data, and Open Banking Plaid powers the financial data layer for 8,000+ apps Read article
