Let’s talk about a case that I was particularly happy about recently:
A student in our family who is preparing to enter the Senior level has just successfully won the Oracle Health Senior Software Engineer Offer. The whole process from Phone Screen to Loop took us multiple weeks together, with ups and downs, but the moment we finally got the offer, everyone breathed a sigh of relief.
This article is shared based on real experience for reference by those who need it.
Phone Screen: Basic, but fast-paced
When the recruiter called, it was clear that this round was mainly about basic skills.
- A medium-difficulty LeetCode (we happened to have practiced similar questions in class)
- Equivalent writing of Java Stream / Collections
The students themselves have a good Java foundation. We prepared the routine of "common writing → Stream writing" in advance, so the phone round was passed smoothly.
Less than a day after the interview, I received a notification that I was entering the loop.
Round 1: Coding + Java basics
This round is quite "basic backend development skills" style.
Coding:
- Merge two sorted arrays (O(N))
- The interviewer asked a lot about boundary conditions follow-up
Java:
- Bean life cycle
@PostConstruct/@PreDestroy
During the sparring session, we organized these points into structured responses that could be repeated and repeated, so the students performed very steadily this round.
Round 2: Hiring Manager
HMs are the type who talk quickly and want to quickly judge a candidate's abilities.
Mainly asked three questions:
- Overall project structure
- How to troubleshoot online problems (HM pays special attention to the client side)
- How to estimate time for unknown demand
The "end-to-end troubleshooting logic" we prepared for him in advance is quite easy to use. It not only talks about the backend, but also covers common scenarios on the client side, such as:
- Differences in user environment
- Version compatible
- Log link
- Boundary issues caused by current limiting/caching
HM is clearly satisfied with this paragraph.
Round 3: Behavioral aspect (BA)
Students said this was the easiest round of the whole process.
The question is basically:
- Have you ever brought in new people?
- How to resolve team conflicts?
- The two most fulfilling things?
- What should I do if no one replies to my email?
Because we built “four reusable story templates” for him, this round was all natural output without any lag.
Round 4: Technology Deep Digging (Coding + System Design)
This is a critical round and the “biggest event” that ultimately determines the offer.
Q1. Minimum number of meeting rooms
The student first talked about the O(N log N) sorting scheme, and then followed the interviewer's prompts and split it into the O(N) method of differential + scan line.
The level of expression is quite clear.
Q2. Next Greater Element
Classic monotonic stack, written in one go.
Q3. Rotated Sorted Array Search
The two-point template questions can also be solved quickly.
Q4. Uber-like system design
This question is completely based on the scenario we have simulated and practiced before (location services + matching + real-time trajectory).
The students answered the whole question directly:
- DB Schema(Passenger/Driver/Itinerary/Location)
- API structure(request/accept/start/finish)
- Driver matching logic: based on geohash
- Real-time location: driver → pub/sub → location service → rider
The interviewer nodded multiple times and said, “You’ve clearly done this before.”
This sentence is basically stable.
Final result: Offer received!
The day after the loop ended, Recruiter received an email:
Congratulations on getting the Oracle Health Senior Software Engineer Offer!
The student shouted "Passed!!!" directly in the group on the spot.
From preparation, practice, simulation, and review, I can see him improve to the point and then fully display his strength. This sense of accomplishment is really strong.
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Don’t let this Hard question or a System Design pitfall ruin your chance of an offer worth hundreds of thousands of dollars.
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