Updated by Sierra AI candidates
Staff Software Engineer Interview Experience
At staff level, they cared less about the code and more about how I’d split the work into phases and show progress at each one.
Interview process
I've only gone through part of it so far, and the flow for me was recruiter screen, one combined online assessment, and then a 75-minute system design round. That design round itself was split into three parts: system design, execution, and then coding one component. What stood out was that they were really checking how I would handle a situation at staff level, not just whether I could code, but how I'd think about breadth, timelines, delegation, status, and delivery. The process felt good to me, and I'm still waiting on the outcome.
- Recruiter screen
- Online assessment
- Technical interview
Interview rounds
5 questions across 3 roundsRecruiter screen
2 questionsOverview
This was not just a scheduling chat for me. I had to walk through my experience and answer concrete staff-level technical questions on messaging systems, Spring Boot, and AWS.
Specific questions asked
How is Kafka different from other event-driven or publisher-subscriber technologies like BullMQ and JMS?
Why would you use Kafka in that situation?
What was your conclusion on when each one fits?
I compared Kafka with BullMQ and JMS and explained the tradeoffs across event streaming and publisher-subscriber use cases. I talked through why I would choose Kafka versus the others and where each one fit better. They were clearly checking whether I could make architecture choices, not just name tools.
What Spring Boot features have you leveraged?
I talked through the Spring Boot features I had actually used on the Java side. It felt like they wanted practical usage, not textbook definitions.
Online assessment
2 questionsOverview
The online assessment was one combined round for me with around 10 Java multiple-choice questions and one Word Ladder coding problem, so it mixed fundamentals with a standard algorithm screen.
Question types asked
Specific questions asked
I did the Word Ladder LeetCode-style problem as the coding part of the assessment. That was the main problem-solving piece in the online round.
Java multiple-choice section covering topics like polymorphism, pattern matching, and Hibernate.
There were around 10 Java multiple-choice questions. The topics I remember were polymorphism, pattern matching, and Hibernate-related concepts.
Technical interview
1 questionOverview
This round was 75 minutes for me and split into three parts: system design, execution, and then coding one component from the design. The prompt was centered on tax refund status.
Question types asked
Specific questions asked
How would you handle execution, timelines, delegation, and status checks?
Pick one component from your design and code it.
I approached it as a staff-level design discussion, so I talked through how I would address the situation, how the timelines would work, how I would delegate, how I would check status, and how I would deliver in phases. The interviewer kept the focus pretty tightly on getting the tax refund status rather than expanding into a lot of integrations. I understood that as them checking breadth, execution, and incremental delivery.
Interview tips
Treat the recruiter call like a real technical screen. I got asked to compare Kafka with BullMQ and JMS, talk through Spring Boot features I had used, and explain AWS efficiency and how I checked Lambda logs. For the assessment, I'd brush up on Java basics like polymorphism and Hibernate and make sure I can do DSA problems without fumbling. In the design round, I'd be very deliberate about laying out phases and what I would deliver at each step because they seemed to care a lot about incremental progress.
Company culture
The recruiter screen wasn't just resume verification for me. They were already doing staff-level filtering with concrete architecture and infrastructure questions. The design round also felt structured in a very practical way: the format was strict, but the prompt itself stayed narrow, basically about getting tax refund status instead of some giant vague platform redesign.
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