The platform for fast coding learning & IT interview prep

Learn coding. Pass interviews with confidence.

Cheat sheets, roadmaps, 200+ IT interview questions with bilingual answers + a real-code simulator. Frontend, Backend, AI, DevOps — packed into 20 minutes a day.

Start interview prep View roadmap
200+
Interview questions
20+
Career roadmaps
20 phút
Per session
interview.ts
const interview = async () => {
const topic = pick('react');
for (const q of topic.questions) {
await ask(q); // 20 minutes only
}
}

Why ORA·tech?

Learning is not just reading theory. The difference is how we help you remember longer and react faster in interviews.

AI personalised path
Spaced Repetition schedules review of your weak topics right before you forget. 20 minutes a day equals 2 hours of self-study.
Real-code simulator
Every question has an interactive HTML/CSS/JS demo. Not just reading — you see code run, edit it, debug it.
Expert answers + AI review
200+ questions from real interviews. Bilingual EN–VI answers with memorable analogies, quality-reviewed by AI + admin.

Get started in 60 seconds

Pick one, read it straight, apply now. No signup needed.

JS Cheat Sheet
10-min read — master ES6+ basics
CSS Tricks
Flex/Grid layout tricks you can use today
Frontend Roadmap
Path from zero to first job
Dev Document
Unified API documentation (devdocs)

8 main tracks — pick your path

From frontend to AI Engineer, each track has its own cheat sheet + roadmap + interview questions.

12 items
HTML
Semantic, layout, SEO basics
Explore
24 items
CSS
Flex, Grid, animation, responsive
Explore
32 items
JavaScript
ES6+, async, event loop, patterns
Explore
18 items
React
Hooks, lifecycle, performance
Explore
14 items
Node.js
Event loop, streams, Express, NestJS
Explore
10 items
Go
Goroutines, channels, Gin, microservices
Explore
12 items
Python
Django, FastAPI, async, Data Science
Explore
8 items
AI Engineer
LLM, RAG, embeddings, AI agents
Explore
See also: DevOps · Docker · AWS · Cyber Security · LeetCode

How it works — 3 steps, 20 minutes a day

From theory to confident interview reflexes.

  1. 1

    Pick a topic

    Go to Interview prep, choose a track (React, Node.js, System Design...). Or read the roadmap for direction.

  2. 2

    Answer for 20 minutes

    The system shuffles random questions. You speak/write your answer — no peeking — then compare with experts, AI grades.

  3. 3

    Spaced Repetition loop

    AI schedules review of your weak questions right before you forget. 3× more effective than random re-reading.

Frequently asked questions

What every CS student / new dev wonders before starting.

Who is ORA·tech for?
CS students, fresh junior devs, mid-level devs aiming for higher pay, or people transitioning into programming. Bilingual VI–EN content so you get comfortable with international interview terms.
Is it free?
Yes. All cheat sheets, roadmaps, and basic interview questions are free. Premium plan unlocks the AI code simulator, personalised AI quiz, and accelerated paths.
How long until I can interview?
Each session is just 20 minutes. On average, 30 days straight (~10 hours total) is enough for confident junior frontend/backend interviews. Mid-level takes 60 days for System Design + scale topics.
How is it different from LeetCode or roadmap.sh?
LeetCode focuses on algorithms, roadmap.sh just lists topics. ORA·tech combines: roadmap + 200+ real interview questions with answers + working code simulator + Spaced Repetition for long-term memory — suited for Vietnamese candidates interviewing at both VN & international companies.
Which languages / frameworks?
Frontend: HTML, CSS, JavaScript, TypeScript, React, Next.js, Angular. Backend: Node.js, Go, Java, Python, PostgreSQL. Other: AI Engineer, DevOps, Docker, AWS, Cyber Security, LeetCode (DSA).

Ready to interview-prep in 20 minutes a day.

Random topic shuffles, timer, AI grading. 100% of basic questions are free — no credit card.

Start now