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Choose technical
Select the technical interview type. You can add your target company to get questions matched to their tech stack.
Technical interview practice
Speak your answers out loud to an adaptive AI interviewer that covers system design, algorithms, problem-solving, and architecture. You get scored on clarity, structure, trade-off reasoning, and depth. All by voice, in your browser. No install and no scheduling.
Practise technical interviews with real-time AI feedback
85% of tech companies use technical interviews. The difference between a vague hand-wave and a structured answer is whether you've practised out loud. Thinking it through in your head isn't enough. Instant Interview lets you talk through system design, algorithms, and architecture with an AI interviewer that scores your clarity and depth in real time.
Question categories
What you'll practise
System design
"Design a URL shortener that handles 100M daily requests."
Algorithms & data structures
"Walk me through your approach to finding the shortest path in a weighted graph."
Architecture decisions
"How would you migrate this monolith to microservices?"
Debugging & troubleshooting
"Production latency spiked 3x overnight. Walk me through your investigation."
API design
"Design the API for a ride-sharing application."
How it works
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Speak naturally
The AI interviewer poses technical problems, listens to your reasoning, and asks probing follow-ups. It works like a real conversation.
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Get scored
Receive instant feedback on problem-solving structure, communication clarity, speaking pace, and technical depth. You also get an AI-improved version of each answer.
Quantified feedback
Every answer, measured
No vague “you did well” feedback. Every session gives you numbers you can track and improve.
Problem-solving structure
Did you clarify requirements, consider alternatives, and evaluate trade-offs? The AI scores how systematically you approached the problem, not whether you got the "right" answer.
Communication clarity
Can you explain complex ideas in plain terms? Technical interviews reward candidates who make their reasoning easy to follow, even on hard problems.
Speaking pace (WPM)
Ideal interview pace is 120–160 words per minute. Too fast signals nerves; too slow loses the interviewer. We measure yours in real time.
Technical depth
The AI evaluates whether you explored edge cases and discussed scalability. Going beyond surface-level answers shows you actually understand the underlying systems.
10 free credits on signup. No credit card required.
Why practise out loud
Thinking it through isn't the same as saying it
Voice reveals thinking gaps
You can sketch a system design in your head. Explaining it out loud exposes gaps in your reasoning and unclear trade-off analysis that you wouldn’t catch otherwise.
Company-specific prep
Enter your target company and the AI researches their tech stack and architecture patterns before asking company-specific questions you might actually face.
Progress you can measure
Track your problem-solving scores, WPM, and communication clarity across sessions. You’ll see where you’re improving and where you still need work.
Built for
Software engineers preparing for Big Tech loops
Backend and frontend developers facing system design rounds
Engineering managers who have technical depth interviews
Graduates entering competitive tech job markets
Career changers moving into engineering
Anyone with a technical round coming up
FAQ
Common questions
What is a technical interview?
A technical interview tests your ability to solve engineering problems, design systems, and reason about trade-offs while communicating clearly. Questions cover system design, architecture, algorithms, debugging, and API design. Interviewers care about your technical knowledge, but they also care about how you structure your thinking under pressure.
What types of technical questions will I be asked?
Questions cover five categories: system design (e.g. design a URL shortener), algorithms and data structures, architecture decisions (e.g. monolith to microservices migration), debugging, and API design. If you enter a target company, the AI adjusts questions to match that company’s known interview style.
How does the AI evaluate my technical answers?
The AI scores four dimensions: problem-solving structure (did you clarify requirements and evaluate trade-offs?), communication clarity (can you explain complex ideas simply?), speaking pace (120–160 WPM is ideal), and technical depth (did you go beyond the obvious?). Each dimension is scored separately so you know where to focus.
Is this only for senior engineers?
No. The AI adapts to your level. Graduates and junior engineers get foundational questions; senior and staff-level engineers face harder system design and architecture problems. The feedback works at any career stage because it focuses on how you communicate and structure your thinking, not only on whether you know the answer.
Is this text-based or voice?
Voice. You speak into your microphone and the AI interviewer responds in real time, asks follow-up questions, and adapts based on your answers. It feels like a real conversation. No typing.
How long is a practice session?
You choose, anywhere from 3 to 30+ minutes. System design questions benefit from longer sessions (15–30 min), while algorithm walk-throughs work well in shorter ones. You can end early at any time and only use credits for the minutes you actually practised.
Can I practise for a specific company?
Yes. Enter your target company and the AI researches it before your session, then adjusts questions to match that company’s tech stack, architecture patterns, and known interview format.
How much does it cost?
Try it free: 10 credits on signup (~10 minutes of practice). After that, subscriptions start at £7.99/mo for 60 credits. You only pay for minutes used.
Other interview types
Your technical round is coming up.
One practice run changes how you structure every answer. It takes less time than reading another system design blog post.
No credit card·Browser-based, nothing to install·End anytime, keep unused credits