Practice interviews.
Land the job.
An AI interviewer that speaks, listens, pushes back, and scores you — exactly like a real senior engineer would.
1 free interview included — no card needed
Given an array of integers and a target, return indices of two numbers that add to target.
I've read the problem. How do you want to approach this?
I'll use a hash map — trade space for time, O(n).
Alex is listening…
Voice AI Interviewer
An interviewer that
actually pushes back.
Alex isn't a form you fill out. It's a real-time voice conversation — asking follow-ups, calling out dead ends, and granting hints when you're stuck. The exact pressure of a real interview, available 24/7.
- ✓Bidirectional voice with <100ms latency via WebRTC
- ✓Contextual follow-ups based on your actual answers
- ✓Hints on request — just say 'can I get a hint?'
- ✓Adapts tone from junior to staff-level questions
Alex · AI Interviewer
Alex · speaking
“Walk me through your approach before you start coding.”
Real Code Environment
The same editor
you use every day.
Monaco Editor — VS Code's engine — with syntax highlighting, live execution, and test cases. No toy interface. The environment you practice in is the environment you'll perform in.
- ✓16 languages — Python, Go, Rust, Kotlin, Swift, Elixir, and more
- ✓Live code execution with real test case results
- ✓Starter code provided for every problem
- ✓Paste detection — Alex notices and addresses it
Detailed Scorecard
Find out exactly
what cost you the offer.
Every session ends with a full debrief. Five dimensions scored. Written feedback on the specific moments that lost you points. The things a real interviewer notices but never tells you — because they've already moved on.
- ✓Scored across 5 dimensions: problem solving, communication, code quality, complexity, speed
- ✓Pinpoints the exact moments where you lost points
- ✓Tracks your improvement across sessions
- ✓Generated by Claude — not a rubric, genuine analysis
Session review
Interview Timeline
What you can practice
Every type of interview.
Every level.
From LC-easy arrays to staff-level system design. Pick what you need to work on.
Arrays & Hashing
Easy–Hard
Two Pointers
Easy–Hard
Trees & Graphs
Medium–Hard
Dynamic Programming
Medium–Hard
Sliding Window
Easy–Hard
Binary Search
Easy–Medium
Backtracking
Medium–Hard
Heap / Priority Queue
Medium–Hard
Linked Lists
Easy–Hard
Supported languages
Python
JavaScript
TypeScript
Java
C#
C++
C
Go
Rust
Kotlin
Swift
Dart
PHP
Ruby
Scala
ElixirBuilt on serious tech
The best tools,
wired together precisely.
Claude (Anthropic)
The brain — reasoning, pushbacks, feedback
WebRTC
Sub-100ms bidirectional voice in real time
Monaco Editor
VS Code's editor, same as your daily driver
Pricing
A real interview. For $1.
No subscriptions. Buy credits once, use whenever. One credit = one 15-min session.
- ✕Hard to schedule
- ✕Inconsistent feedback
- ✕Can't repeat on demand
- ~Variable quality
- ✕Awkward dynamics
- ✕No structured scorecard
- ✓On demand, 24/7
- ✓Consistent AI feedback
- ✓Detailed scorecard every time
Starter
10 credits — $1.00 each
- ✓10 sessions
- ✓15–60 min formats
- ✓Full scorecard
- ✓Never expire
Most Popular
Save 12%25 credits — $0.88 each
- ✓25 sessions
- ✓15–60 min formats
- ✓Full scorecard
- ✓Never expire
- ✓Full job-search sprint
Intensive
50 credits — $0.78 each
- ✓50 sessions
- ✓15–60 min formats
- ✓Full scorecard
- ✓Never expire
- ✓Built for FAANG prep
Not ready to commit? Sign up free — 1 interview included, no card required.
The offer you want
is one interview away.
The engineers who walk out knowing they nailed it didn't get lucky. They practiced the performance, not just the problem. Start now.
Start free — no credit cardarrow_forward1 free interview included. No setup. No subscription required to start.