Jane street software engineer intern interview reddit

I'm just wondering what's your guys' take on this year's Jane Street Salary, which is k prorated, or 25k for 10 weeks.

Personally, I only made it to the round before the final round, so this figure is from a couple buddies of mine who are starting their internship this summer.

I knew someone from my school a couple years ahead of me who went to work at Jane Street. In his final year before he left to do something elsehis all-in compensation was in the low 7-figures. You probably will not find compensation like that at a bulge bracket firm. I'm assuming he left prior to 11? To my knowledge, even prop trading has gone down a bit for the last few years. But yes, low 7-figure for a 27 years old sounds amazing. I'm assuming he could probably retire he he stuck around till he's Try it for 0 bananas here.

I believe he left in or maybe even It's possible that prop trading has gone down over the last couple years, but I cannot say for certain since it is not my area of expertise.

As for retiring when he's in his 30's I think he could still do that after joining his tech start up. He is partner-level instead of a regular employee so he has been given a substantial amount of equity. He has also directly invested some of his own personal capital in the start-up. Still too early to say if they will be successful, but if the company does go public or get acquired by another company, well, he will be set for this lifetime and probably a couple more lifetimes to come I made it to the 3rd round.

I'm pretty smart, but you pretty much have to be a genius to work there. They ask you to do a lot of things in your head that most people can't do.

jane street software engineer intern interview reddit

But look at LTCM. The people at LTCM had no common sense. If they were losing money that quickly they should have been quicker to pull the plug and re-evaluate. Instead they doubled down. It's hard to believe how terrible their risk management was. Sounds very competitive with tech companies and start ups, which is who they're really competing with here. Interns and new hires can actually do substantial work vs. I've heard of starting base salaries in the low 6 figures for quants, quant traders and devs at a lot of Chicago shops now.

Combined with the cost of living differential in NYC it doesn't seem that absurd. The real money is all about the bonus anyway. As long as your base is livable it shouldn't be a deciding factor. WSO depends on everyone being able to pitch in when they know something.

Software Engineering Interviews at Jane Street

Join Us. Already a member? Popular Content See all.Interviewing, for both the interviewers and the interviewee is just plain old hard work. We spend a lot of time working on the process, and we know that you have spent years working on your skillset. It can put even an accomplished person off their game. From our perspective, the main thing we want to figure out when we interview someone is: are they someone we want to work with? We are looking for candidates who engage in clear and productive discussions about the problem at hand.

Ideally they quickly find the right technical level for the discussion - not too abstract and not too detailed. They cleanly describe the most important considerations, and lay out a good plan for dealing with them.

Where there are tradeoffs they note them and explain which side they took and why.

How I Got An Internship At Citadel

They ask thoughtful questions about parts of the problem that are unclear. Overall they show tenacity and and curiosity; they want to engage with the problem and with the people they are working with. Those kinds of things can be found on the internet. We prefer more open-ended problems that have several plausible angles of attack and maybe even no single best answer.

Most problems at Jane Street are solved with a lot of collaboration and discussion, and the solutions often take days or weeks to work out, incorporating ideas from many many people. The tenor and quality of those discussions is an essential part of getting to the right answer. And by clear, we mean simple and to the point.

Use words and examples that get the core idea across to the widest technical audience possible. Naturally we like it when candidates are good at solving the problems we put in front of them. Tell us when you are fairly confident but still a little bit uncertain. Get used to talking about not just the problem but also your own confidence in individual assumptions and statements. Code is a wonderful language for communicating complex ideas.

It provides a concise and unambiguous way of expressing them. But, like any foreign language, it takes a lot of time and practice to get really comfortable. We need you to be comfortable with it because we communicate ideas in code a lot.

Jane Street Capital | First Round Phone Interview

It means that you should be able to read and write code in your language of choice without constant access to reference materials for common things, such as:. Similarly, when picking which features of the language to use pick the ones you understand best. Once you discuss a plan of attack with your interviewer do what you claimed you would do.

If you do get partway through and start to lose faith step back and talk about it. Explain exactly why you are concerned. That said, we need you to have a solid working knowledge of core computer science concepts, including:. Unfortunately we need programs to actually run so we need people who understand the inner workings of that behemoth. But there are a few things that pop up time and again that people worry we are looking for that bear mentioning.

Coding in front of people is hard. Coding with a time limit is hard. Coding, in general, is hard. Dev interviews are about programming, plain and simple.

There are other jobs at Jane Street that do care about mental math and logic puzzles for good reasons. Just not this one. Build something from scratch and on your own in a language you like. Build the whole thing.I have my first round phone finance interview with JSC in 4 days. What should I be expecting? Anyone who had their ph interview with JSC.

Software Engineering Interviews at Jane Street

Jane Street Capital is a notoriously prestigious firm with a difficult interview process; while our users have shared a great deal of information about later stages in the process - the first round is less discussed. Below is a description of the interview process from our users. According to our users, the first round is composed of mental math and probabilities problems.

The first round questions were honestly pretty easy if you're not terrible at math. I was asked to do some mental computations, and a basic probability question regarding dice.

Second round questions were a bit harder, but still reasonable. They are all mental problems i. User Brady4MVP commented on the interview process as a whole:. It's very tough to get a job there. There are around five rounds of interviews, each one getting progressively harder. You will be tested on math, economics, probability and statistics.

To put it simply, you have to be really sharp to land a job. User kadgeratnuma consulting analyst, explained their experience interviewing in a detailed post about the final round:. Before the interview I went through five phone interviews before they invited me down.

When they say 'we aren't looking for the right answer so much as how you think about a problem', they mean it. At the final round itself you are given poker chips at the start of the day.

Over the course of the next hour long interviews, you have to use the chips to make bets on scenarios given to you. Some sources claim these scenarios can be as simple as 'make a market on the temperature in the room', I didn't get these questions and I'm guessing that they are reserved for internship interviews. I got much more difficult ones, that require a decent amount of math. You will need to use the trading terms to bet on the results you get.

User eecs explained their summer analyst interview experience:. Their 4th round interview for a SA gig yes 4th round for a summer internship was almost like a Math Olympiad. Want to land at an elite hedge fund use our HF Interview Prep Course which includes questions across hedge funds. Hedge Fund Interview Prep Course. Try it for 0 bananas here. Does anyone know if they invite you in for an in-person interview if you are located out of state?

I interviewed with JSC. Third round--harder still.

jane street software engineer intern interview reddit

One of the questions I got was: my roommate and I are having a house party. We invite 15 couples. At the party, everyone must shake hands with everyone whom they do not already know. At the end of the party, I can't remember the number of people I have met, so I go ask all other people at the party how many hands they have shaken, and they each tell me a different number.Jane Street is a quantitative trading firm with a unique focus on technology and collaborative problem solving.

Learn how we make the markets more efficient. More on Trading. Tech is core to our business, and software development is integrated into everything we do. Learn how functional programming sets us apart. More on Tech. Jane Street offers institutional clients access to its proprietary liquidity through a variety of services. Learn how to trade with Jane Street.

More on Services. Our growth comes from hiring and training amazing people and giving them the tools they need to innovate.

Our culture is casual and our careers are intensely rewarding. Work with us. A very different street Jane Street is a quantitative trading firm with a unique focus on technology and collaborative problem solving. Learn more. Tech at the Center Tech is core to our business, and software development is integrated into everything we do.

Institutional Services Jane Street offers institutional clients access to its proprietary liquidity through a variety of services. Join our Team.If you're a quant trader or financial services technologist nowadays, you will probably have heard of Jane Street.

You will probably also want to work there. Many try. Few succeed: the company says only a "small percentage" of applicants are accepted for interview and that its notoriously difficult interview questions get harder with each round. For those not in the know, Jane Street is about as hot as things get in the world of quant trading. Jane Street describes itself a little differently as, "a global liquidity provider specializing in equities ETFs and options.

Because Jane Street isn't a public company, no one knows exactly how much it pays people globally.

jane street software engineer intern interview reddit

The most recent were filed last October and are for the year ending December Even so, they're pretty illuminating. These are the kinds of returns banks have only been able to dream of since the financial crisis. Secondly, profit margins at Jane Street are correspondingly healthy. So, Jane Street certainly pays well - but it also pays less than Facebook and a lot less than Goldman Sachs. Still want to work there? Be ready for some "ridiculously hard" interview questions, assuming you even make it that far.

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Search Jobs. Graduate Guide. Follow MadameButcher. How to get a job in high frequency trading now. What's a quant developer in a bank or hedge fund? Jane Street's structure is a warning to traders everywhere. Newsletter sign up Get the latest career advice and insight from eFinancialCareers straight to your inbox Sign up.

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How to depression-proof your career in banking Citi made it far easier to get an offer from this year's internships. Popular job sectors Popular job sectors Loading Cannot load job sectors at this time.Are you thinking about applying to Jane Street for a software engineering role?

Or already have a phone interview scheduled but unsure what to expect? Read on as we walk through an example phone interview with you. We want to give you some insight into what a typical Jane Street phone interview looks like and give you a chance to prepare. As such this post is meant to be a specific case analysis. We expect you to write code in a real programming language in the interview, not pseudo-code.

You should be comfortable with basic data structures and APIs in the language of your choice. Note, there are no bonus points for using a functional language like OCaml. If during the interview you realize you have seen a question before, then please let us know and we can do a different question. Have you heard about memoization? Can you carefully describe what it is? A good introduction is on Wikipedia. A possible solution in OCaml might be:. Nice spot! Whichever APIs or data structures you end up using for your solution: you should be prepared to talk about how they work and what the complexity of various operations is.

Can you think of any issues we could run into when using the function from part 1? Quite the opposite from what we hoped memoization would do!

Can you see what the problem might be? The big problem is memory usage. Our application might call f with lots of different inputs and each result will be stored in the hashtable forever — a memory leak! Can you come up with some ideas to improve upon this? A reasonable approach to control the memory usage is to bound the size of the hash-table and to evict things from it in a FIFO fashion.

What trade-offs does FIFO have versus other eviction schemes? How could you modify your memo function to implement FIFO? There are a few different ways to do this. A good solution keeps a separate queue: when adding a new result to your hashtable, if the size grows beyond the bound, then dequeue from the queue and remove that element from the hashtable.

Besides being able to write code to do this, we look for how you communicate your thoughts on the problem and ideas to improve it. As you probably realize, FIFO can be very inefficient in some use-cases.

We still want the implementation to be as efficient as possible. How can you implement this? Once more, there are multiple ways to do this. The easiest solution stores timestamps with each value in the hashtable and linearly scans through the table when evicting.

This is O n. Side-note: implementing the most efficient solution One way to get to O 1 is to maintain a doubly linked list and make the values in the hash-table point to elements in that list. Then when looking up a cached value in the hash-table, you can slice it out of its current position in the list and put it at the top in O 1. You maintain a separate pointer to the bottom of the doubly linked list to evict in O 1.

While we might ask you to implement parts of your solution, this part is intended as a discussion and test your ideas for improving complexity.I'm just wondering what's your guys' take on this year's Jane Street Salary, which is k prorated, or 25k for 10 weeks.

Personally, I only made it to the round before the final round, so this figure is from a couple buddies of mine who are starting their internship this summer. I knew someone from my school a couple years ahead of me who went to work at Jane Street. In his final year before he left to do something elsehis all-in compensation was in the low 7-figures.

You probably will not find compensation like that at a bulge bracket firm. I'm assuming he left prior to 11? To my knowledge, even prop trading has gone down a bit for the last few years. But yes, low 7-figure for a 27 years old sounds amazing. I'm assuming he could probably retire he he stuck around till he's Try it for 0 bananas here.

I believe he left in or maybe even It's possible that prop trading has gone down over the last couple years, but I cannot say for certain since it is not my area of expertise. As for retiring when he's in his 30's I think he could still do that after joining his tech start up.

He is partner-level instead of a regular employee so he has been given a substantial amount of equity. He has also directly invested some of his own personal capital in the start-up.

jane street software engineer intern interview reddit

Still too early to say if they will be successful, but if the company does go public or get acquired by another company, well, he will be set for this lifetime and probably a couple more lifetimes to come I made it to the 3rd round. I'm pretty smart, but you pretty much have to be a genius to work there. They ask you to do a lot of things in your head that most people can't do.

But look at LTCM. The people at LTCM had no common sense. If they were losing money that quickly they should have been quicker to pull the plug and re-evaluate. Instead they doubled down. It's hard to believe how terrible their risk management was. Sounds very competitive with tech companies and start ups, which is who they're really competing with here. Interns and new hires can actually do substantial work vs. I've heard of starting base salaries in the low 6 figures for quants, quant traders and devs at a lot of Chicago shops now.

Combined with the cost of living differential in NYC it doesn't seem that absurd. The real money is all about the bonus anyway.

As long as your base is livable it shouldn't be a deciding factor. WSO depends on everyone being able to pitch in when they know something. Join Us. Already a member? Popular Content See all. Leaderboard See all. TR Resources See all. Rank: Senior Monkey


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