Build a Notification Inbox / Activity Feed
3 min read “Build a notification inbox” is a frontend interview prompt that overlaps with comments, message threads, and feeds — but with […] Read article
Frontend Engineering
AI-Era Interviewing
RLHF and Post-Training Interview Topics: A 2026 Specialist Track
3 min read “Post-training” (the work of taking a pretrained model and aligning it for instruction-following, helpfulness, and safety) has emerged as one Read article
AI-Era Interviewing
AI/ML Compensation Outliers 2026: Why Some Roles Pay $1M+
3 min read The widely-circulated reports of $1M+, $5M+, even $10M+ AI compensation packages are real but uncommon. Understanding which roles command this Read article
AI-Era Interviewing
AI Inference Infrastructure Interview Prep 2026: vLLM, Triton, Kernels
3 min read “AI inference engineer” is one of the highest-comp specialties in 2026 — the engineers who make GPUs go fast in Read article
AI-Era Interviewing
AI-Era Take-Home Assignments 2026: How They Changed
3 min read Take-home assignments have always been controversial — pre-AI, the complaint was time investment; post-AI, the complaint is “how do you Read article
Mobile System Design
Design Mobile In-App Purchase and Subscription Validation
3 min read “Design in-app purchases and subscription validation” is the unglamorous mobile-system-design question that pays for many apps. The interview tests whether Read article
Mobile System Design
Design a Mobile Video Editor: CapCut and iMovie Style
3 min read “Design a mobile video editor” is one of the harder mobile-system-design questions because the stack involves GPU rendering, a non-trivial Read article
Mobile System Design
Design a Mobile Audiobook App: Background Playback and Sync
3 min read “Design an audiobook app” is the audio-only cousin of the music-streaming and podcast prompts. Audible, Libby, Spotify Audiobooks, Apple Books Read article
Mobile System Design
Design a Mobile Live Sports App: Scores, Streaming, Highlights
3 min read “Design a live sports app” is a senior mobile-system-design prompt that combines real-time data, video streaming, push at scale, and Read article
Frontend Engineering
Build a Date Range Picker with Presets
3 min read “Build a date range picker” is a frontend machine-coding problem that punishes ambiguity. Used in analytics dashboards, booking flows, and Read article
Frontend Engineering
Frontend System Design: Build Slack’s Message Thread UI
3 min read “Design Slack” is a familiar backend system-design prompt. The frontend version is different — Slack’s message thread UI is genuinely Read article
Frontend Engineering
Build a Tags / Chip Input Component
3 min read “Build a tags input” is a frontend machine-coding question that looks easy and rewards careful thinking. The user types, hits Read article
Frontend Engineering
Build a Comments Thread: Nested Replies, Pagination, Optimistic Updates
3 min read “Build a comments thread” is one of the most realistic frontend machine-coding problems — every product team builds one eventually. Read article
AI-Era Interviewing
Interviewing at AI Tooling Companies: Cursor, Windsurf, Continue
3 min read The AI coding tools market in 2026 is a live category. Cursor, Windsurf (formerly Codeium), Continue, Sourcegraph Cody, and others Read article
AI-Era Interviewing
AI Product Engineer Interview 2026: The New Hybrid Role
3 min read Job titles like “AI product engineer” or “applied AI engineer” did not exist in 2022. By 2026 they are among Read article
