SkillHacker

SkillHacker is a practice platform built for developers who've done the LeetCode grind and now need to prep for the real interviewer in the room—the one asking about system design, frontend performance, and how you'd actually build production React apps at scale. You pick your role, you pick your path, and you stop scattering yourself across random algorithm problems that you'll never see in an actual job interview anyway.

Here's what makes it different: it's role-centric, not topic-scattered. You choose Senior Frontend Developer, and the categories converge on what that role actually needs—JavaScript, TypeScript, React, CSS, Web APIs, System Design, Testing, Performance. You practice in free flow with hints and inline documentation when you're stuck, so it feels like building something, not cramming for an exam. Then you hit Test mode to benchmark yourself against other developers chasing the same role. There's offline support too, so you can practice on a flight with zero WiFi and still show up to the interview prepared.

The space is crowded—there's LeetCode, there's HackerRank, there's a dozen interview prep repos on GitHub. But SkillHacker's bet is that most developers aren't doing algorithm drills because they're already good at those; they're bombing technical interviews because they've never practiced system design or real-world frontend architecture out loud. Built for developers who want to stop memorizing and start building. Currently free to start with GitHub.