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
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 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
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
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
AI-Era Interviewing
Interviewing for AI Eval Engineering Roles: The 2026 Specialty
3 min read “Eval engineer” went from a niche role at AI labs in 2023 to a named specialty at most AI-shipping companies Read article
AI-Era Interviewing
AI-Era Behavioral Interviews 2026: How Behavioral Questions Shifted
3 min read Behavioral interviews looked the same in 2018 and 2022. They no longer look the same in 2026. The widespread adoption 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
Returnship & Late-Career
The Open-Source Comeback: Re-Entering Tech via OSS Contributions
3 min read For engineers returning after a multi-year gap, open-source contribution is one of the highest-leverage strategies for re-entry. Done well, it Read article
Returnship & Late-Career
Late-Career Founders: When to Build a Startup After 50
3 min read The “late-career founder” is more common than tech mythology suggests. Research from Pierre Azoulay and the Census Bureau put the Read article
Returnship & Late-Career
Returning to Tech with a Disability or Chronic Condition
3 min read Engineers who return to tech after managing a disability or chronic illness face a different set of considerations than other Read article
Returnship & Late-Career
Returning to Tech After Caring for an Aging Parent
3 min read Caregiving for an aging parent is one of the most common and least-discussed reasons engineers leave tech for a year Read article
Engineering Manager
The Annual Plan: Building a Multi-Quarter Engineering Roadmap
3 min read The annual plan is one of the highest-leverage artifacts an engineering manager produces. Done well, it sets expectations, surfaces dependencies, Read article
Engineering Manager
EM and Tech Debt: Negotiating with Product Without Losing the Team
3 min read “Why can’t we ship faster?” is a question most engineering managers hear weekly. The honest answer is usually some combination Read article