Question 1
Tell me about a technical decision you made that other teams had to live with.
Approach. Say the constraint, who disagreed, and what you wrote down so the decision could be reversed later.
Staff engineer interview questions from a job description
Turn a staff engineer job description into likely scope, design, and influence questions, with a one-line approach.
Matched in your browser from the requirements in the posting and Luna’s interview-question hub. These are practice prompts, not a claim that this wording will be asked.
Requirements in the posting
Staff Engineer
Set technical direction across more than one team, and still stay close to the work.
You will:
- Lead architecture reviews and write down decisions other teams have to live with
- Drive technical strategy for a product area, including what you will not solve this year
- Mentor engineers without taking the problem away from them
- Own outcomes end to end when a cross-team design is stuck
- Discuss system design at the level of failure, latency, and scope
We will ask about a decision you made reversible on purpose.
Set technical direction across more than one team, and still stay close to the work.
You will:
- Lead architecture reviews and write down decisions other teams have to live with
- Drive technical strategy for a product area, including what you will not solve this year
- Mentor engineers without taking the problem away from them
- Own outcomes end to end when a cross-team design is stuck
- Discuss system design at the level of failure, latency, and scope
We will ask about a decision you made reversible on purpose.
Likely questions
System design
Technical leadership
Drive technical strategy for a product area, including what you will not solve this year
Question 2
How do you mentor without taking the problem away from the person who should own it?
Approach. Describe the question you asked and the work you left in their hands.
Question 3
What would you explicitly leave unsolved in a staff-level design for this posting?
Approach. Name the later version. Interviewers listen for what you will not build yet.
System design
System design
Discuss system design at the level of failure, latency, and scope
Question 4
Design the system behind the main workflow in this posting. What has to be fast, and what can wait?
Approach. Users and API first. Name one bottleneck and the piece you will not build in the interview.
Question 5
How would you estimate capacity before picking a database?
Approach. Use rough numbers, label every assumption, and say which number would change the design.
Question 6
What do you shed first when traffic spikes, and which user promise do you keep?
Approach. Name the load you drop and the promise tied to the product in the posting.
Behavioral
Mentoring
Mentor engineers without taking the problem away from them
Question 7
Tell me about mentoring someone more junior. What did you leave for them to do?
Approach. Name the person, the skill, and the piece of the work you did not take back.
Question 8
How do you give feedback a junior engineer can use the same week?
Approach. One observation, one change you asked for, and how you checked that it happened.
Behavioral
Ownership
Drive technical strategy for a product area, including what you will not solve this year
Question 9
Tell me about something you owned after it shipped, when the interesting part was over.
Approach. Spend the time on the follow-through: the metric, the bug, or the user you went back to.
Question 10
What would you do in the first month if you owned the area this posting describes?
Approach. Name what you would learn, what you would not pretend to know, and the first small outcome.
What to prepare
- Prepare one decision that set direction for more than your own team.
- Narrate one design in sixty seconds before you draw any boxes.
- Prepare one person you helped grow, including the work you left in their hands.
- Pick one project you owned after the launch, not only until the launch.
- Mark the three requirements you cannot yet support with a story.
- Say each answer out loud once, in under two minutes.
Staff postings are scope interviews. “Multi-team,” “strategy,” and “architecture review” mean a decision other people had to live with. Mentorship means you left the work in someone else’s hands. System design at this level is about what you will not build yet, and how you wrote the decision so it can be reversed.
Coding may still appear, but the failure mode is answering like a senior on a single service when they asked about direction. Read whether the posting says you still write code. If it does, have a recent example. If it says influence, do not invent a fake IC week.
Prepare one written decision and one person you mentored without becoming the hero. The sample is a staff role across product teams.
Sample job description
The posting below is already in the tool. The questions are the ones its requirements point to. Replace it with a posting you are actually interviewing for.
Related: Google system design questions · Staff design scope · Amazon behavioral questions