Google (Pixel, Nest, Fitbit) embedded interview prep

Roles they hire for

• Wearable firmware engineer
• Smart-home firmware engineer
• Security chip firmware engineer

What they emphasise

• Wearables and smart-home devices
• Matter and Thread
• Titan security chips

Brush up on

MatterThreadLow-power designSecure bootSensor hubs

How the rounds usually run

A typical consumer hardware loop for embedded roles. Companies vary by team and seniority.

Recruiter screen

• Background, role fit and logistics

Example: Walk me through your current project in two minutes.

Technical phone screen: C coding

• Live C coding: data structures, bit manipulation, memory
• Explaining your code and edge cases out loud

Example: Implement memmove and explain how you handle overlap.

Loop: embedded system design

• Architecture for a device feature end to end
• Power, memory and real-time trade-offs

Example: Design firmware for a wireless earbud's charging case.

Loop: RTOS, concurrency and debugging

• Scheduling, synchronization, priority inversion
• Hardware and software debugging with scopes and schematics

Example: Explain priority inversion and two ways to prevent it.

Hiring manager and behavioural

• Ownership, cross-functional work and judgement

Example: Tell me about a time you shipped under a hard deadline. What did you cut?

Practice questions

Original questions written for Google (Pixel, Nest, Fitbit)'s focus areas, not leaked ones.

1. Design a sensor hub that keeps step counting running while the main CPU sleeps.
2. How would you secure a smart thermostat's firmware update path end to end?
3. Explain how a Matter device is commissioned onto a home network.
4. A wearable's battery life dropped 20% after an update. How do you find the regression?
5. What would you put in a security chip versus the main processor, and why?

Your prep playlist

Design rounds to practise

Themes are inferred from Google (Pixel, Nest, Fitbit)'s public product lines.