Frontend Accessibility: ARIA, Keyboard, and Screen Readers
3 min read Accessibility is no longer optional. It is required by law in many jurisdictions and by ethics in all. Senior frontend […] Read article
Frontend Engineering
Frontend Engineering
Building a Virtualized Data Table: Sorting, Filtering, Selection
2 min read Data tables are one of the most-built and most-broken UI components. The naive implementation breaks at 1,000 rows. The interview Read article
Mobile System Design, System Design
Design a Mobile Smart Home App: Bluetooth, Local Network, and Cloud
2 min read Smart home apps (Apple Home, Google Home, SmartThings, Hue) sit at an unusual intersection of mobile development, IoT, network protocols, Read article
Mobile System Design, System Design
Design a Mobile QR Scanner: Camera, Detection, and Action
2 min read QR scanners are a deceptively rich mobile system design problem. Camera capture in real time, edge case handling (low light, Read article
Mobile System Design, System Design
Design a Live Audio Room App: Clubhouse / Twitter Spaces
2 min read Live audio rooms (Clubhouse, Twitter Spaces, Discord Stage Channels) are an interesting mobile system design topic. They sit between video Read article
Mobile System Design, System Design
Design Mobile On-Device Translation: Offline Models and Privacy
2 min read Modern mobile translation apps (Google Translate, Apple Translate) increasingly run inference on-device. The interview tests whether you understand the tradeoffs Read article
Mobile System Design, System Design
Design a Mobile News App: Personalization, Push, and Offline
2 min read Mobile news apps (Apple News, Google News, Flipboard, NYT app) sit at an unusual intersection of feed personalization, time-sensitive push Read article
Mobile System Design, System Design
Design a Mobile Reading App: Kindle-Style Sync and Annotations
2 min read Designing a Kindle-style mobile reading app is a layered system design problem. Format rendering, position sync across devices, offline downloads, Read article
AI-Era Interviewing
Multimodal AI in Engineering: When Vision and Voice Models Are Useful
2 min read By 2026, AI models that handle text, images, and audio simultaneously are mainstream. Engineers working on AI features need to Read article
AI-Era Interviewing
Vibe Coding: When AI-First Development Works and When It Does Not
3 min read “Vibe coding” — the term Andrej Karpathy popularized in early 2025 for writing software primarily by prompting an AI assistant Read article
AI-Era Interviewing
AI Agents in Production: Architecture and Failure Modes
3 min read AI agents — autonomous systems that take actions in the world — are one of the hottest interview topics in Read article
AI-Era Interviewing
When to Use RAG, Fine-Tuning, or Prompting: 2026 Decision Framework
2 min read “How do you decide between RAG, fine-tuning, and prompt engineering?” is one of the most-asked AI/ML interview questions of 2026. Read article
AI-Era Interviewing
AI Coding Assistants: Cursor, Copilot, Claude Code in 2026
2 min read The AI coding assistant landscape in 2026 has matured significantly. The conversation has shifted from “do you use AI tools?” Read article
AI-Era Interviewing
Reviewing AI-Generated Code: Skills for the 2026 Engineer
3 min read By 2026, most engineers in tech jobs are reading AI-generated code daily. Either they wrote a prompt and the model Read article
Frontend Engineering
Frontend Authentication: Cookies, Tokens, and Session Management
3 min read Authentication is one of the most error-prone parts of a frontend application. Get it wrong and you have account takeover, Read article