What topics does Valve test in interviews?

Commonly reported topics include Perl.

Valve interview questions

From 2 candidate accounts, updated Oct 12, 2026

Candidate accounts: 2
Rounds on average: 1
Rounds in every loop: 1
Offers among stated outcomes: 0 of 1

How the loop works

This guide draws on 2 first-hand interview accounts from Hacker News. Candidates describe about 1 round on average, most often a panel.

All of them were posted under a forum handle, so we could not verify the authors’ identities.

See open roles at Valve

Interview experiences at Valve

Role not stated

Outcome not shared

unknown. 1 round. Shared by kator on hn, 2014-05-05

1Whiteboard coding interviewPanelTwo interviewers had the candidate code a problem on a whiteboard in Perl. One incorrectly flagged a syntax error that turned out to be correct.Covered: Perl

Role not stated

Not selected

Senior. 1 round. Shared by TwoNineFive on hn, 2018-06-01

1All-day onsitePanelDay of interview sets with interviewers who seemed overworked and constantly interrupted by notifications.

Valve interviews: FAQ

What is the interview process like at Valve?: This guide draws on 2 first-hand interview accounts from Hacker News. Candidates describe about 1 round on average, most often a panel.
What topics does Valve test in interviews?: Commonly reported topics include Perl.

These guides summarize public, first-hand interview experiences shared by candidates. They describe the shape of each loop and the topics that came up, not a leaked question bank, and every experience links back to its original source. Processes change often. Treat this as directional prep, not a script.