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The Interview Process
3 stages over ~7 days. What each round tests and how to prepare.
We're still collecting Kastle interview data. The process below is modelled on similar B2B startups (<50 people).
Interview stages
Intro Call
Video call · 30 min
Culture fit and role expectations
Founder or hiring manager
Technical Deep Dive
Video call or in-person · 60 min
Past projects and problem-solving approach
Technical founder or lead
Final Round
In-person or video · 45 min
Team fit and offer discussion
Founding team
Kastle interview timeline
Timeline: ~7 days. That's faster than the B2B median (10 days at <50 people). Faster processes usually mean fewer candidates in the pipeline.
Frequently asked questions
How many rounds is the Kastle interview?
3 stages: Intro Call, Technical Deep Dive, Final Round.
Is the Kastle interview hard?
Expect relevant experience and culture fit, not algorithm trivia. Candidates report Final Round as the toughest stage.
Does Kastle give a take-home task?
No, Kastle does not include a take-home stage.
How long does Kastle take to get back to you?
Around 7 days across the full process.
What should I prepare for the Kastle interview?
Focus on relevant experience and culture fit. At <50 people, they're testing whether you can operate without process, not whether you memorised algorithms.
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