AI coding interview assistant for live coding rounds
Coding rounds are where most candidates freeze: a problem you have seen before looks different under a timer with someone watching. LastRound AI's Coding round reads the problem straight from your screen and gives you exactly as much help as you ask for, from a one-line hint to a complete solution with its complexity.
It works from screenshots, not from the interviewer's voice, so it also works in silent rounds and take-homes where nobody is talking.
Summarized question: Return the indices of the two numbers in nums that add up to target.
Approach: one pass with a hash map. O(n) time, O(n) space.
For each number, check whether target minus it was already seen.
def two_sum(nums, target):
seen = {}
for i, n in enumerate(nums):
if target - n in seen:
return [seen[target - n], i]
seen[n] = i61interview languages
~1 sto the first words of an answer
Hiddenon screen share and recordings
1 creditper minute, free plan included
How it works
Four steps, all on the keyboard
- 1
Pick Coding round and press Start
Choose the round type (DSA/Algorithms, System Design (Code), Frontend, Backend, Fullstack or Other) and your language: Python, JavaScript, TypeScript, Java, C++, C#, Go, Rust, Swift, Kotlin or another.
- 2
Capture the problem
Press ⌘/Ctrl + H with the problem on screen. Long problems can take several captures, including the examples and constraints. The badge on Capture counts them.
- 3
Get the answer
Press ⌘/Ctrl + Enter. The answer streams under the toolbar, with code in the language you picked.
- 4
Change the kind of help
Switch AI Style without restarting the session: Hints, Approach, Edge Cases, Explain, Communicate, or your own instruction.
What you get
Built for this round
Hints when the interviewer is watching you think
Quick Hints point you towards the solution without handing it over, so your reasoning stays your own on the call.
Approaches and trade-offs
See more than one strategy with its trade-offs, so you can say which one you are choosing and why before you write a line.
Edge cases before they ask
The inputs that break a naive solution, ready for the moment the interviewer asks whether you are done.
Words, not just code
Explain and Communicate turn the solution into what you would actually say out loud while you type it.
No audio needed
Coding round works entirely from what is on screen, so it is just as useful in a silent online round as in a pair-programming call.
Hidden on screen share
The overlay is excluded from screen sharing and screen recording, so the interviewer sees your editor, not the assistant.
Watch the full walkthrough
The desktop app from setup to a streamed answer.
Before the interview
Set your default language once
⋮ → Interview Setup → Coding rounds prefills the round type and language, so Start is one click on the day.
Learn the shortcuts first
Answer with ⌘/Ctrl + Enter, capture the screen with ⌘/Ctrl + H and hide or show the overlay with ⌘/Ctrl + B. The shortcuts work while your meeting, browser or editor has focus.
Practise on a real problem
Run a short session on any LeetCode-style problem before the interview so the flow is familiar.
Where to be careful
- Your mouse pointer is shared even though the overlay is not. Clicking the overlay moves focus away from the editor, which some coding platforms record. Use the keyboard shortcuts.
- Proctored coding platforms differ, and some prohibit outside tools. Check the rules of the round you are taking.
AI Coding Interview Assistant: FAQ
Does the coding interview assistant need to hear the interviewer?
No. Coding round works from screenshots of the problem, so it needs no audio at all. For spoken questions during the same call, switch to Live interview.
Which programming languages does it support?
Python, JavaScript, TypeScript, Java, C++, C#, Go, Rust, Swift and Kotlin, plus Other for anything else. The answer's code is written in the language you choose.
Can I get hints instead of the full solution?
Yes. The AI Styles panel beside each answer re-asks the same captured problem as Hints, Approach, Edge Cases, Explain or Communicate, or with your own instruction. It does not restart the session or cost extra credits.
How much does it cost?
Sessions bill 1 credit per minute, rounded up, from Start to End. Every account gets 15 free credits a month, so you can try it on a practice round before paying. Paid plans add more credits each month.
Other interview types
- System design interviewsStructured answers to design questions, grounded in your experience
- Behavioral interviewsSTAR answers built from your own stories and numbers
- Phone screen interviewsHelp on recruiter screens, on your laptop or your phone
- Online assessmentsMultiple choice, code output and puzzles from a screenshot
- HireVue and one-way videoPrompts read from audio or screen during recorded interviews
Learn more
Try it on a practice round first
Download the app, run a practice session with your free credits, and see the answers for yourself before the real one.