Engineering Articles & Deep Dives

A detailed visual guide to the 25 core DSA patterns, covering how to identify them, when to use them, how they connect, and how to think like an interviewer using creative Mermaid diagrams.

A detailed technical breakdown of Vercel’s April 2026 security incident, covering the attack chain, OAuth risk, environment variable exposure, incident response lessons, and what engineering teams should do next.

Learn how to solve the Nested Checkbox Tree machine coding problem in React using recursion, parent-child synchronization, and scalable state management.

A detailed guide to backend engineering from first principles. Learn how backend systems really work beyond CRUD APIs, including requests, HTTP, routing, authentication, validation, business logic, databases, caching, queues, observability, security, scaling, testing, OpenAPI, webhooks, and DevOps.

A complete beginner-friendly blog on how to build a Shopping Cart Sidebar in React for frontend machine coding rounds. It covers component thinking, state management, cart logic, UI structure, derived values, localStorage persistence, cart badge count, safer quantity controls, edge cases, and interview tips in very easy language.

A practical, source-backed guide to the Axios npm supply chain compromise in March 2026, including the malicious versions, the postinstall malware behavior, exposure checks, and the remediation steps engineering teams should take now.

A complete, interview-ready guide to building a credit card input system with formatting, card detection, validation, masking, UX improvements, and real-world edge cases.

A senior-engineer-level deep dive into distributed systems covering real-world trade-offs, hidden challenges, and production lessons.

A practical deep dive into GenAI system design covering LLMs, RAG, cost optimization, latency trade-offs, and real-world architecture patterns.

A deep dive into designing data infrastructure systems covering ingestion, storage, processing, pipelines, and real-world production trade-offs.

A deep dive into designing AI-powered code assistants covering LLMs, context retrieval, latency optimization, and real-world production architecture.

A detailed guide to vector database architecture covering embeddings, indexing, similarity search, storage design, filtering, and production trade-offs in modern AI systems.

A detailed guide to RAG pipelines covering retrieval flow, chunking, indexing, ranking, prompt construction, and production system design trade-offs.

A detailed guide to solving a frontend machine coding round question by building an OTP input component with clean state management, keyboard handling, focus movement, paste support, and edge cases.

A detailed guide to building an infinite scroll list for frontend machine coding rounds, covering scroll detection, pagination, performance, and real-world edge cases.

A detailed guide to building a multi-step form for frontend machine coding rounds, covering state management, validation, navigation, and real-world UX patterns.

A detailed guide to building a virtualized list for frontend machine coding rounds, covering rendering optimization, scroll calculations, visible windowing, and real-world performance trade-offs.

A deeply practical guide to distributed model training and orchestration with detailed explanations, visual flows, code examples, and real-world system behavior.

A deep-dive into API caching from a system design perspective, covering React Query, SWR, and Apollo Client with real-world trade-offs.

Comprehensive guide to optimizing React applications with modern techniques, tools, and real-world patterns for production-level performance.

Master advanced TypeScript concepts including conditional types, mapped types, type guards, and practical patterns used in large-scale applications.

Master Next.js 14's App Router with comprehensive coverage of server components, streaming, caching, and production-ready patterns.

Essential system design concepts tailored for frontend engineers, covering scalability, performance, and architectural patterns.