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Interview experiences
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Interview experiences · OpenAI
OpenAI Software Engineer Interview Experience — Rejected After the Infrastructure Onsite Round
Phone Screen: Coding — Snapshot Set Implement a Set that supports snapshots. Besides the normal add/remove operations, you need to support creating a snapshot and being able to read the state of the set at a given snapshot moment. Onsite 1: System Design — Design a Payment System Design a payment system where a transaction first goes through an external payment service for approval/denial. Once a…
Interview experiences · OpenAI
OpenAI Software Engineer Interview Experience — Rejected After the Recruiter Call, Before Any Technical Round
I was pretty surprised. I never expected to fail at this round. A friend referred me. The role is not in the AI area, and it matches my current job by more than 80%. When I scheduled the call with the recruiter, I asked if there was anything I needed to prepare. The recruiter said no preparation was needed, so I assumed it would be a very casual chat to get to know my basic info. These are the qu…
Interview experiences · OpenAI
OpenAI Software Engineer Interview Experience — Strong Coding, Closed Out as a Borderline Case After the Virtual Onsite
Overall, I just did my best (shrug). Phone screen: Coding — "infection," 3/5. I got stuck on a bug on the third question and spent about 15 minutes debugging it. System design: chess. Interviewed on a Thursday, heard back that I passed by the following Monday. Virtual Onsite: Coding — IP address, 3.5/5. I got to the IPv6 part of the question and was hunched over looking up how to write a BigInteg…
Interview experiences · OpenAI
OpenAI Software Engineer Interview Experience — Two Onsite Rounds, Same Day, Coding and System Design
I had two rounds back to back on the same day, each about 60 minutes. The interviewer was about 5 minutes late both times. The coding round interviewer was really nice, but the second round felt a lot more serious. Overall the experience was fine. I got the rejection letter the next day. The coding round was a multipart social graph + snapshot problem. The first question was the same as H2H. The…
Interview experiences · OpenAI
OpenAI Software Engineer Interview Experience — Virtual Onsite Design Round: Sora With One GPU per Task
Same as the coding round, the interviewer pulled out the question from my phone screen. But the interviewer was really friendly, and he also told me an important piece of information: right now the company has interviewers pick the power grid question as their first choice, so everyone should prepare that one more. Later it switched to designing Sora, and a pretty useful constraint was that each…
Interview experiences · OpenAI
OpenAI Software Engineer Interview Experience — Virtual Onsite Rescheduled a Dozen Times, GPU Credit Coding Round
First, let me vent about how chaotic this company is. It was originally scheduled as 4 rounds in one day. Then it got rescheduled a dozen-plus times and ended up as 4 days with 1 round each. The interviewer also got swapped 7-8 times... On top of that, the interviewer didn't know what I'd been asked in the phone screen, so the question they gave me was the same one as my phone screen, and then th…
Interview experiences · OpenAI
OpenAI Software Engineer interview: machine counting and rate-limit design
I started with a phone screen about my background and a basic data structures problem. From there, the interviews ramped up quickly. The process felt intense and focused on whether I could handle real engineering problem solving under pressure. The technical rounds included a complex challenge around counting machines and a system design question about rate limiting. I had already practiced rate-…
Interview experiences · OpenAI
OpenAI Software Engineer interview: two days of coding interviews
The process was straightforward and fast-paced. I had two days of back-to-back interviews, mostly coding problems, plus a hiring-manager interview. It felt practical, more about showing I could solve problems than getting lost in theory. The topics matched standard preparation: LeetCode-style practice covered the coding well, and I also prepared for the behavioral round. The turnaround after the…
Interview experiences · Opendoor
Opendoor Backend Engineer Interview Experience — Three Surprise Technical Rounds After HR Went Dark
The first round was with a tech lead, and it was the only round with a good experience. It wasn't a traditional behavioral round — it was pretty relaxed, just getting a feel for work style and company culture. Right after the tech lead round I was immediately moved forward, and then HR vanished for a week. I emailed the tech lead to ask what was going on, and that's how I found out the original H…
Interview experiences · OpenText
OpenText Software Engineer interview: campus online assessment
My first step was a timed online assessment. It started with multiple-choice questions and then moved into DSA coding. There were a couple of coding problems, including one like Longest Common Prefix, and the overall difficulty felt manageable. In my version, there were 15 multiple-choice questions and two DSA coding questions in a short window. It was part of campus recruitment, so it felt like…
Interview experiences · OpenText
OpenText Solutions Engineer interview: practical design discussions
After a recruiter conversation, I went through a comfortable set of interviews. The team felt friendly and professional rather than rigid. Technical questions stayed close to my experience and the design decisions I had actually made. There was a system-design discussion, a coding component, and some low-level design questions. Even as the topics broadened, the tone stayed conversational. The man…
Interview experiences · OPTIMUS IT SERVICES
OPTIMUS IT SERVICES Software Engineer interview: campus OA error and DSA-heavy selection
I joined a campus drive where everyone who registered reported together to the Noida office. The day began with an OA for about 100 students: 20 aptitude questions and 2 DSA questions. The OA felt rough immediately because my submission hit an error on their side and I had to take it again. Even after that, selection seemed to rest much more on the DSA section than I expected. The mismatch betwee…
Interview experiences · Optiver
Optiver Data Scientist Interview Experience — A Marathon of 17 Probability OA Questions
Pick a random integer from 1 to 10,000. What's the probability that every digit of that number is different? Roll a die until you roll something greater than 4. What's the expected value of the sum of all the rolls? Draw 3 cards from a standard 52-card deck. What's the expected value of the product of the three numbers (J = 11, Q = 12, K = 13)? Toss 100 coins. Pair up an H with a T and remove tha…
Interview experiences · Optiver
Optiver Intern Software Engineer Interview Experience — A 90-Minute OOD/State-Machine OA on CPU Core Cooling
I recently finished this company's Summer SDE Intern OA, so I'm writing this post to give back to the community. There were two parts in total. One part was a HackerRank OA (90 minutes), an OOD / state machine simulation problem — a puzzle game kind of like Tower of Hanoi. Problem overview Implement an OverheatPreventionController class to simulate and manage the temperature and cooling state of…
Interview experiences · Optiver
Optiver Software Engineer Interview Experience — A Brutal Four-Section OA With Coding, Pattern-Finding, and Probability
I think their OA basically gets sent out to everyone — I got mine right after I applied. There are four sections and the intensity is pretty high. The email doesn't mention this, but you can actually do them separately, so I'd suggest doing one section per day. Coding The coding section lets you go back to earlier questions, so if you don't know how to solve one, I'd suggest skipping it first. 90…
Interview experiences · Optiver
Optiver Software Engineer Interview Experience — Breaking Down the Four-Part OA
The Optiver OA is honestly pretty hard. This part is 2 medium-difficulty coding problems plus 1 approximate-solution problem, all in 90 minutes. The problem types lean toward DP (dynamic programming) and heap (priority queue) style problems — testing mathematical modeling, data structure simulation, strategy backtesting, and statistical analysis skills. Approach: before starting a problem, quickl…
Interview experiences · Optiver
Optiver Software Engineer Interview Experience — HackerRank OA: News Subscription System Design
✅ Interview experience summary: News Subscription System design (hands-on HackerRank question) 📌 Problem background (system design) You're a news aggregation service. The goal is to give users one unified system for subscribing to all news providers, so they only receive content they're interested in without being overloaded with volume. The system needs to manage large data streams efficiently a…
Interview experiences · Optum
Optum Software Engineer interview: walk-in technical rounds and reversed selection message
I attended a walk-in drive with two technical interviews, each roughly 1 to 1.5 hours. Both sessions went well, and the content felt solid. The frustrating part was the communication afterward. An HR representative told me I had been selected and that the hiring HR would contact me with next steps. Soon after I started going home, the same person called back to say my profile had been put on hold…
Interview experiences · Oracle
Oracle Account Executive interview: easy call, poor follow-through
One process began with a short recruiter conversation that felt easy and genuinely smooth. It lasted about 10 to 15 minutes, and I received positive feedback about the call, yet I was rejected afterward. A follow-up message after the call was never answered. In another run, the recruiter side broke down. The recruiter seemed careless and unprofessional, did not give useful detail about the role,…
Interview experiences · Oracle
Oracle Data Scientist Intern Interview Experience — Two Rounds, Then Doubts About an All-Research Role
Two rounds total, and the interviewers barely showed any expression the whole time. Two rounds total: the first was with someone pretty senior who asked me about a past project of mine, question-and-answer format, behavioral. The second round was coding plus introducing another one of my projects. They mainly work on conversational AI, and the questions didn't dig into specific technical details…
Interview experiences · Oracle Health
Oracle Health Account Executive interview: a late recruiter call and unanswered concerns
My process began with a recruiter interaction that already made me uneasy. The recruiter was late, and the tone felt cold and dismissive. People already in the role had told me the process should be simple and that I would not be expected to know everything. I went through the interview steps anyway and was ultimately rejected without meaningful feedback. What stayed with me was not only the miss…
Interview experiences · Oracle Health
Oracle Health Account Executive interview: an Oracle Eats mock cold call
After a recruiter call, I went through interviews that increasingly focused on how I'd handle a sales scenario. Near the end, I answered behavioral questions and took part in a mock cold call selling something called "Oracle Eats." That exercise felt like the biggest hurdle. I needed to think and respond under pressure as well as explain my background. The process seemed focused on fit and carryi…
Interview experiences · Oracle Health
Oracle Health Account Executive interview: brief and unresolved
I began with a short HR interview of about 10 to 15 minutes, and it went smoothly. The recruiter gave me positive feedback, so I was surprised to be rejected later. A follow-up email also received no response. It was a brief experience with a friendly tone at the start, but the later silence left it feeling incomplete. The biggest surprise was how quickly it ended despite the initial positivity.…
Interview experiences · Oracle Health
Oracle Health Account Executive interview: missed interviews and frozen position
The recruiter experience started badly and never recovered. I found the recruiter unprofessional and more focused on getting through the process than helping me understand the role. My questions went unanswered, and even after several follow-ups I still did not know the next steps. I was also missed for an interview I had been scheduled to attend. When I was booked to speak with a VP of sales, I…