tech-presentation-interview

Tech Presentation Interview

The tech presentation round is a reverse system design: instead of designing a hypothetical system on a whiteboard, you present a real system YOU built. This tests three things no other round can: genuine depth of understanding, ability to communicate complex ideas under pressure, and authentic ownership versus inherited knowledge.

When to Use

Use for:

• Selecting which project to present from your career
• Structuring a 25-45 minute technical presentation with narrative arc
• Calibrating depth -- which components to go deep on, which to skim
• Preparing whiteboard/virtual-board diagrams with progressive disclosure
• Rehearsing answers to hostile follow-up questions
• Adapting presentation to different audience compositions (researchers, engineers, managers)

NOT for:

• Designing a system you haven't built (use ml-system-design-interview)
• Writing your resume or extracting career stories (use cv-creator or career-biographer)
• Coordinating across multiple interview rounds (use interview-loop-strategist)
• Practicing coding problems or behavioral STAR stories
• Conference talk preparation (different format, different evaluation criteria)

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Project Selection

The most common failure mode is choosing the wrong project. Use this decision tree:

flowchart TD
    A[List your top 5 projects] --> B{Did YOU make key<br/>technical decisions?}
    B -->|No, I inherited it| SKIP[Skip this project]
    B -->|Yes| C{Can you explain<br/>alternatives you rejected?}
    C -->|No, I just used<br/>what was standard| SKIP
    C -->|Yes, I evaluated<br/>tradeoffs| D{Are there interesting<br/>failure modes or<br/>unexpected challenges?}
    D -->|It went smoothly| WEAK[Weak choice --<br/>no drama = no depth]
    D -->|Yes, things broke<br/>or surprised us| E{Can you fill 30+ min<br/>of technical depth<br/>on 2-3 components?}
    E -->|No, it was<br/>straightforward| WEAK
    E -->|Yes| F{Is it relevant to<br/>the target role?}
    F -->|Not really| BACKUP[Keep as backup --<br/>use if nothing<br/>better qualifies]
    F -->|Yes, strong match| PICK[Strong candidate --<br/>select this project]