The React Interview Questions Seniors Actually Ask

🔨 Tool stack getting expensive? Stop paying 20+ SaaS bills (Sponsor)
In 2026, building is cheap.
Tooling is not.

Every serious dev now needs AI, design, content, automation, analytics, scraping, ads research… and suddenly you’re juggling $1k–$3k/month in subscriptions just to stay competitive.

Instead of choosing which tools to cancel, what if you just had all of them?

This bundle gives you access to 50+ premium tools in one subscription, including AI models, automation platforms, design suites, content generators, ecommerce spy tools, and growth software. all accessible through a private browser with auto-login built in.

It’s built for builders: indie hackers, ecommerce operators, growth engineers, and devs shipping products who don’t want tool costs killing margins.

🏆 #1 on the market with 4,000+ users inside.

🎯 Senior React Interview Questions (From Devs Who Actually Hire)
This Reddit thread is packed with takes from senior engineers and hiring managers on the React questions they actually ask. Not surface-level trivia, but reconciliation internals, when (and if) to use useEffect, debugging re-renders, state management trade-offs, and how to handle a messy legacy codebase. The real value is in the nuance and disagreements. You’ll see how experienced devs think about performance, architecture decisions, and what truly separates mid-level from senior. If you’re prepping for interviews, this is a seriously useful read.

⌨️ TanStack Drops a Type-Safe Hotkeys Library
TanStack just released Hotkeys (alpha), a fully type-safe, cross-platform keyboard shortcut library with built-in sequence detection, key state tracking, and even hotkey recording. It handles the annoying stuff for you, Mod key mapping (Cmd vs Ctrl), input filtering, automatic cleanup, and conflict warnings.

🧠 Stop Wrapping useQuery the Wrong Way
TkDodo breaks down a subtle but common mistake: creating custom hooks over useQuery that slowly destroy your TypeScript inference. What starts as a clean abstraction quickly turns into generic chaos, unknown types, and brittle APIs. The solution? Stop abstracting with hooks. and start using the queryOptions API instead. If you use TanStack Query and care about type safety, composability, and clean architecture, this is required reading.

🏗 How we rebuilt Next.js with AI in one week
Cloudflare just dropped vinext, a drop-in Next.js replacement built on Vite, rewritten almost entirely by AI in under a week for ~$1,100 in tokens. It runs on Workers, builds up to 4x faster, and ships dramatically smaller bundles. But the real story isn’t just performance, it’s the process. One engineer, strong tests, tight guardrails, and modern AI models rebuilt 94% of the Next.js API surface. Whether you’re skeptical or excited about AI-assisted engineering, this is a fascinating look at what’s suddenly possible.

Quick Links

🤖 Put your emails on autopilot, and your business results in overdrive
A lot of devs love building products but struggle with marketing (which is required if you actually want to grow the business). Put your emails on autopilot, and your business results in overdrive. Marketing that runs itself? Yeah, that’s a thing now. Constant Contact has automation tools that run in the background so you don’t have to. Emails, texts, offers, they go out exactly when you want them to, without needing to hit send every time. It’s free to get started, and honestly? It’s kind of a game changer. [ad]

💬 Code Isn’t what is slowing your project down
We love blaming complexity, tech debt, or “the architecture” when projects drag on. But this piece makes a sharper claim, it’s not the code slowing you down, it’s the conversations you’re not having. From Conway’s Law to real-world team silos, it shows how poor cross-team communication quietly shapes bloated systems and multi-month timelines. If you’ve ever wondered why a “two week task” turns into a quarter-long saga, this will hit close to home.

💔 Vibe Coding" Threatens Open
Open-source maintainers are shutting the gates. From cURL killing its bug bounty to tldraw auto-closing external PRs, a wave of low-quality AI-generated contributions is overwhelming projects. What looks like a moderation problem is actually deeper, fewer real humans reading docs, filing bugs, or engaging with maintainers. New research suggests “vibe coding” could quietly erode the economic incentives that keep open source alive. If this trend continues, today’s small projects might never become tomorrow’s Linux.

🤔 Creator of Claude Code: "Coding is solved"
Bold claim from the team behind Claude's coding capabilities that programming as we know it is fundamentally solved by AI. They dive into what this means for software engineers and whether we should be excited or terrified about the future of development work. Essential reading if you want to understand where one of the leading AI companies thinks this is all heading.

🧠 86% of Frontend Repos Have Memory Leak Patterns
A new large-scale study scanned 500 real-world React, Vue, and Angular repos and found missing-cleanup patterns in 86% of them, over 55,000 potential leaks. The biggest offenders? Timers, event listeners, and subscriptions that never get cleaned up.