Frontend Engineering

⏱ 3 min read Frontend testing has matured significantly — Jest is sometimes replaced by Vitest, Cypress and Playwright dominate E2E, and React Testing […] Read article

⏱ 3 min read Micro-frontends are the architectural pattern of splitting a large web application into independently developed and deployed pieces. Module Federation (Webpack Read article

⏱ 2 min read “Build a Twitter timeline” is one of the most popular frontend system design questions at FAANG, mid-tier social, and FinTech Read article

⏱ 2 min read The Pinterest masonry grid is harder than it looks. Variable-height columns, infinite scroll, lazy-loaded images, no layout shift — all Read article

⏱ 2 min read “Build a checkout form like Stripe” is a beautifully focused frontend system design question. It touches PCI compliance, iframe sandboxing, Read article

⏱ 3 min read Senior frontend interviews increasingly probe browser internals — not because you need to memorize the V8 codebase, but because understanding Read article

⏱ 2 min read Core Web Vitals are Google’s metrics for “how good does this site feel?” — and Google uses them in search Read article

⏱ 3 min read “Walk me through how you would design a design system from scratch” is a standard frontend system design question for Read article

⏱ 4 min read Vercel hires more senior frontend engineers than nearly any other company in 2026. The product surface (the deployment platform, the Read article

⏱ 4 min read Linear is one of the more selective frontend hires in 2026. The company has built a reputation for craft — Read article

⏱ 3 min read Notion’s frontend engineering hires sit in a particular niche: the block-based editor, the database views, the multi-platform consistency between web Read article

⏱ 4 min read Figma’s frontend interview is one of the deepest in the industry. The product surface — a real-time collaborative design editor Read article

⏱ 6 min read JavaScript and TypeScript fundamentals get tested in frontend interviews in ways generalist SWE interviews skip. Closures, prototypal inheritance, the event Read article

⏱ 4 min read The chat UI machine-coding round tests whether the candidate can build a real-time-feeling messaging interface from scratch. The exercise covers Read article

⏱ 4 min read The image carousel machine-coding round is one of the more deceptive frontend interview tests. Surface-simple — show images, navigate between Read article