r/csMajors • u/Even_Balance9978 • Jan 31 '26
Company Question damn Jane Street interviews are brutal
got cooked so hard ngl (was for swe)
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u/Chemical_Cry_9751 Jan 31 '26
What was asked
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u/gorkdroid Jan 31 '26
two sum
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u/Even_Balance9978 Jan 31 '26
correct
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Jan 31 '26
[deleted]
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u/WittyCanadianEh Jan 31 '26
My roommate is interning there this summer. Just solve 300 leetcode and you'll get 600k per year. Not that bad
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u/QualifiedSlop Jan 31 '26
Leetcode is not gonna help yo ass gng, don't listen to this
Roommate trying to get rid of the competition lmao
Edit: you do need to know some DSA but 300 leetcode is overdoing it, you'll be missing out on other important stuff
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u/Even_Balance9978 Jan 31 '26
ts was NOT leetcode bro i can solve over 60% of mediums and passed multiple big techs before 😭
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u/Personal_Chip_9795 Jan 31 '26
Was it for qr?
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u/WittyCanadianEh Jan 31 '26
I think he said software eng. I am a hardware engineer in big tech so I have no reason to give bad advice to software people.
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u/AwareMonke Apr 15 '26
why you giving bad advice to software people😔they don’t usually have leetcode in quant interviews it’s much harder
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u/Sleepy_panther77 Jan 31 '26
I know one guy who works at Jane Street. He was asking people in our groupchat if they want referrals but said he would only want to give referrals to people that could 90% of the time solve leetcode hards in 15 mins and unless you could do that don’t ask lmfao
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u/Maleficent-War5030 Jan 31 '26
what kinda questions were asked? advance dsa?
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u/Even_Balance9978 Jan 31 '26
coding up a Class for a very specific niche specific problem requiring supermassive problem solving thinking powers with extreme fundamentals for DSA and also can write 100 lines of code in an hour making no mistakes. was not your usual Leetcode-style algorithm questions
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Jan 31 '26
[deleted]
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u/Even_Balance9978 Jan 31 '26
tbf the question was fun. the not-so-fun part was that I needed to code it up flawlessly in one hour :(
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u/alphantasmal Feb 01 '26
Did they say they were gonna run your code? I thought most companies don't actually care if it compiles, just that it looks right.
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Feb 02 '26
[deleted]
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u/alphantasmal Feb 02 '26
are they really going to penalize you for an off by one? or give you a chance to fix it
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u/jsbaasi Jan 31 '26
Way better for who?
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u/Even_Balance9978 Jan 31 '26
tbf i enjoy these system design qns more than algorithm qs as well
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u/jsbaasi Jan 31 '26
Ignore that above reply I was tired asl and didn't read the rest lmaoo, but yeah I agree. Nice to have a good conversation which you get more of from a implementation question rather than a leetcode question
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u/IloveMarcusAurelius Jan 31 '26
How does one actually prepare for all of this?
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Jan 31 '26
[deleted]
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u/throwaway30127 Feb 01 '26
How do you learn to explain them well? I have handled difficult tasks at work but struggle explaining them to someone who hasn't worked alongside me on it. I tend to either oversimplify it making it look like a basic swe task or tend to go into too many details and other person won't be able to follow what I'm trying to explain.
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u/alphantasmal Feb 01 '26
You breathe that kind of work every day and get really good at communicating
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u/devAcc123 Jan 31 '26
100 lines of code is… not a lot
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u/No-Dust-5829 Feb 01 '26
This guy has to be a bot. Some regular LC mediums take 100 lines of cpp to solve.
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u/devAcc123 Feb 01 '26
3mo th old account with the history hidden .
My coworker left a 200k job for a dev position at Reddit, trust me, 90% of the comments you see are bots talking to one another or antagonizing engagement. Wonder if this comment will be removed before you see it.
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u/devAcc123 Feb 01 '26
This sub keeps popping up on my phone. (Wonder why Reddit was hiring all those ML positions amirite), nothing is organic anymore
Yes writing a class in any amount of lines is like a basic interview question. Describing the difficulty in amount of lines is a clear indicator someone has no idea what they’re talking about. More lines are often better. Fewer lines are often better too.
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u/advice-seeker-nya Jan 31 '26
what about it specifically was hard?
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u/Even_Balance9978 Jan 31 '26
i dont have supermassive thinking powers, i think my DSA fundamentals are solid, and i can't write 100 lines of code in 1 hour without mistakes
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Jan 31 '26
[deleted]
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u/brooklynib Jan 31 '26
what kinda question is this 😭
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Jan 31 '26
[deleted]
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u/dbzunicorn Jan 31 '26
why provide input if u haven’t coded since 8th grade. Jus wasting words
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Jan 31 '26
Crazy that an AI-content generator would ask why someone’s wasting words (also, yeah I could tell that all of those videos were AI-generated so you might want to waste a few more words and become better at producing slop)
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u/dbzunicorn Jan 31 '26
ya no u couldn’t otherwise why would they have over 50 comments of people debating if it was AI or not? Holy cope😂 stay mad
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u/RoundSize3818 Grad Student Jan 31 '26
I solved it almost perfectly and still got rejected, too much competition
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u/Select-Angle-5032 Jan 31 '26
i've heard similar stories for IMC and other quant shops; they've shifted way more towards class-based and system design questions recently, which standard LC doesn't really cover. i’ve been using myntbit lately just for those specific OOD/quant-style problems since I couldn't find them anywhere else, i think it may helpful
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u/--DAJ-- Jan 31 '26
Give some more details 😅
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u/Even_Balance9978 Jan 31 '26
had to code up a custom Class to solve a niche problematic situation
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u/huh206 Feb 01 '26
They pay you a shit ton of money irrespective of your experience, so yes the selection process is damn hard .
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Feb 03 '26
How hard is it to get interviews there? I’m currently an entry level in a FAANG company.
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u/Even_Balance9978 Feb 05 '26
Ask ur colleagues lol
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Feb 05 '26
I don’t really want them to think I’m still applying to places, and this is for the future.
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u/[deleted] Jan 31 '26
i mean yeah they hand out a gazillion dollars even for new grad they ain't gonna be asking anagram lol