The interviewer will find your gaps in 45 minutes. Gapmap finds them first: a short conversation draws your personal map of topics, a 15-minute diagnostic measures your real level on each, and you close the gaps with study notes and mock interviews - in text or voice - graded like the real thing. 200+ topics at senior depth are free and open, no signup.
A startup from Paphos, Cyprus that is founded by Bohdan Shevchenko.
Personal topic map
A conversation about your goal (role, stack, target level) composes a map of the topics that actually matter for it - not a one-size-fits-all checklist.
Adaptive diagnostic
A 15-minute session that measures your level on every topic of your map and colors it by depth - so you can see your real gaps before you spend a single hour studying.
Verification sessions
You explain a topic in your own words; an AI interviewer asks follow-up questions and grades your reasoning against per-question rubrics. A topic closes only when you've proven it.
Voice mock interviews
Full voice-to-voice interviews drawn from your own map - the questions target your weak topics, and the grading works the same as in text
Per-criterion feedback
Every graded answer comes back scored against explicit criteria: what landed, what was missing, what an interviewer would have pushed on.
Free study library
200+ interview topics with study notes written to senior depth and reviewed against official documentation. Free, no signup.
Interview breakdowns
Real interview questions broken down one by one: a strong spoken answer, why it works, where people slip, and the follow-ups to expect.
Work on next
The map maintains a short prioritized list of what to tackle next, re-ranked after every graded answer - no decision fatigue between sessions.
Individual developers preparing for interviews - Gapmap is a personal tool, not a company subscription
Most interview prep starts with practice. Gapmap starts with measurement: a short conversation about your goal draws a personal map of topics, and a 15-minute adaptive diagnostic scores your actual level on each one - so you only study what's actually weak. A topic counts as closed when you've explained it out loud to an AI interviewer that asks follow-up questions and grades your reasoning against per-question rubrics - not when you tick a checkbox.
Mock-interview platforms and question banks answer "how do I practice?" but leave "what exactly should I practice?" to you. Gapmap answers that question first and keeps re-answering it: the map re-prioritizes after every graded answer. The entire study library - 200+ topics written to senior depth - is free with no signup; you pay only for measurement and mock interviews.
Mid-level and senior software engineers preparing for technical interviews - frontend, backend, DevOps, system design - who have limited prep time and need to spend it on real gaps, not on rereading everything. It also fits engineers returning to the job market after years at one company who no longer know where they stand.
Gapmap grew out of our own interview prep. The standard routine - reread everything, grind questions, hope - wastes most of its time on topics you already know. The tool we wanted didn't exist: something that would honestly tell you what you don't know, then check that you can actually explain it out loud. So we built the grading engine first, and the map grew around it.
Next.js (App Router), TypeScript, Tailwind CSS, PostgreSQL (Supabase), Drizzle ORM, deployed on Vercel. The grading, interview and voice layer runs on Anthropic's Claude models.
Gapmap.dev appears to be a niche or emerging tool, and without verified, up-to-date information on its features, performance, and user reviews, I cannot confidently confirm its quality. I recommend researching current user feedback, documentation, and community discussions before relying on it for critical use cases.
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