SpaceX Embedded Software Engineer Full-Time Project Deep Dive and Puzzle

Role: Embedded Software Engineer — Starlink
Result: No offer
Interview time: February 2026
Location: Hawthorne, California
Application channel: Online application
Process length: About two weeks
Experience rating: Positive
Difficulty: Average

Recruiter call

A technical recruiter responded within a week of the application and scheduled a 30-minute conversation. The call included:

• A brief résumé walkthrough.
• Focused questions about the candidate's contribution to a project relevant to the role.
• Why SpaceX?
• A direct warning about long working hours.

The recruiter then provided a link for a call with the team's lead engineer.

Team-lead interview

The 45-minute call spent about 35 minutes on an extremely detailed discussion of one relevant project. Questions examined why specific design decisions were made and how individual components worked within the larger system.

The round ended with a puzzle: distribute 1,000 one-dollar bills among ten envelopes so that any requested whole-dollar amount from 1 through 1,000 can be formed by handing over some combination of whole envelopes.

The candidate did not advance. The disclosed next steps would otherwise have been live coding with several engineers, followed by a full-day onsite, facility tour, and team meetings.