Tezvyn: Tech Interview Prep

Yukti Labs

Contains adsIn-app purchases

About this app

You are not trying to learn everything. You are trying to crack one interview.

Tezvyn cuts tech interview prep into 60-second cards - small enough to read standing on a metro, waiting in a queue, or in the ten minutes before the call.

Five minutes of dead time a day, instead of the evening you never actually get.

Every interview card answers three things

- What the question is really testing - the thing behind the question
- The answer that lands - a strong answer outline, not a wall of theory
- The red flag - the specific mistake that ends the conversation

Most interview prep hands you a question and an answer. Almost none of it tells you what quietly gets you rejected.

Four kinds of card, all pointed at the interview

Interview cards - real interview questions with model answers and the red flags that sink candidates.

Concept cards - the knowledge underneath, for the ideas you half-know and have never had to defend out loud.

Updates - what changed in your stack recently, because interviewers ask about the thing they read last week.

Quizzes - a question straight after the card, so it moves from recognised to remembered.

8,664 cards across 28 stacks

Frontend interview questions - React and Next.js; Vue, Angular and Svelte; CSS and Design Systems; TypeScript and Web APIs

Backend and databases - Python and FastAPI, Node.js and Express, Go and Rust, Databases and Architecture, SQL

AI and ML interview questions - LLMs and Generative AI, Computer Vision, MLOps and Infrastructure, Data Science and Analytics

Mobile - Flutter and Dart, React Native, iOS and Swift, Android and Kotlin

DevOps interview questions - Docker and Kubernetes, Cloud Platforms, CI/CD and Automation, Monitoring and SRE

Product manager interview questions - Product Strategy, Growth and Experimentation, Analytics and Metrics, Agile and Scrum

Design and UX - UI Design and Figma, UX Research, Design Systems, Content and Copywriting

Built for the gaps, not for an evening

- Works offline - one commute is enough
- Five cards a day; swipe, don't study
- Search any stack you are about to be interviewed on
- Save what you keep forgetting and revise it the morning of
- Start reading straight away - no account needed
- Streaks and levels, so five minutes actually happens tomorrow too

Who it is for

Developers, data and ML engineers, mobile engineers, DevOps and SRE, designers and product managers preparing for interviews at startups, product companies and big tech. Whether it is your first developer job or your fifth, the hard part is the same: explaining something you already know, out loud, to someone deciding about you.

What it prepares you for

The round where an interviewer asks you to explain your own stack and listens to how you answer - depth, trade-offs, and the follow-up question after your first answer. Every card is written for that moment rather than for a syllabus.

Free and premium

Read free every day, no account needed. Premium removes ads and the daily limit: Rs 290 per month or Rs 2,400 per year, cancel anytime.

The whole library is readable free on the web at tezvyn.com, so you can check your stack is covered before installing anything.

Questions, or a card that reads wrong: [e-mail]

What’s new

Fixes for problems you should never have seen:

• Some devices could not stay signed in after a reinstall or a phone transfer, silently. Fixed, and it repairs itself on this update.
• The paywall briefly showed dollar prices before your real price loaded.
• Choosing a monthly plan left the yearly one still looking selected.
• Error messages now say what happened and what to do about it.