Spacex Software Engineer interview: first-principles and hardware-focused questions

Spacex·Software Engineer·Reported Jul 2026
Medium

The process started with a short recruiter call about my background, then turned technical almost immediately. The next call lasted about 30 minutes and felt grounded in first principles. I answered quick checks on fundamentals such as the ideal gas law and Bernoulli's equation, then moved into structures-style questions. Even when I did fine on the equations, it seemed they wanted tight, confident reasoning more than a polished explanation.

What surprised me was the mix of engineering basics and hardware-adjacent thinking. I was asked what I would do if something went wrong during processing, and they also probed my understanding of setting up machining. The questions ranged more broadly than I expected, and I connected fundamental electrical concepts with RF engineering topics.

The difficulty felt average to advanced. It was not a gotcha puzzle, but it was more demanding than a typical phone screen. I did not get an offer. My takeaway was that I was being judged on how consistently I could apply fundamentals under pressure, not on whether my experience mapped perfectly to the exact problems.

Location: United States. Overall feedback: positive. Offer status: no offer.

Published

Curated and edited by PracHub

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Interview at a glance

Company
Spacex
Role
Software Engineer
Difficulty
Medium
Date
Reported Jul 2026

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