PEAK6 started in 1997 as an options trading shop in Chicago, founded by Jenny Just and Matt Hulsizer, who had traded options together at O’Connor and Associates. PEAK6 Capital Management, the original business, still trades U.S.-listed equity options and provides liquidity to the options market from a technology-heavy proprietary trading desk. Over nearly three decades the firm expanded well past trading: it has built, bought, or turned around more than 200 businesses, and its fintech infrastructure company, Apex Fintech Solutions, grew out of a 2012 acquisition of a struggling clearing firm and now handles custody and clearing for brokerages including Webull and SoFi.
That second half of PEAK6 is what makes it different from the other prop shops on this site. PEAK6 Strategic Capital is the firm’s venture arm, and its portfolio includes Zogo (a financial-literacy app it acquired), We Insure and Team Focus Insurance Group, Bruce Markets (an overnight equities trading venue), and Evil Geniuses, an esports organization. The firm also runs PEAK6 Trials, a paid founder-residency program that funds people building new fintech companies from inside PEAK6’s infrastructure. PEAK6’s headquarters has been shifting from Chicago to Austin, Texas, though Chicago remains a major engineering and trading hub alongside offices in New York and a development team in Budapest. If you’re interviewing here, the first thing worth figuring out is which of these businesses you’re actually talking to, because the process and the questions are not the same across all of them.
Process
For software engineering roles on the trading-technology side (postings usually sit under “Technology” on PEAK6’s careers page, with titles like Software Engineer II, Senior Software Engineer, or Staff Software Engineer, Execution), candidates describe a recruiter screen, then a HackerRank online assessment of two Leetcode-style coding problems in about 90 minutes, followed by a video interview covering past experience and foundational technical questions. The final round is a virtual onsite with five back-to-back interviews: one coding round (often built around a problem drawn from the trading domain), one system-design round, one non-coding technical conversation, and the rest behavioral or team-fit. Average time to an offer runs around three weeks by Glassdoor’s reporting.
Roles tied more directly to trading and quant work run a heavier quantitative screen. Candidates report an online exam that mixes logic puzzles, pattern recognition, and expected-value problems, plus a timed mental-math section (something like 30 questions in four minutes). A phone or video round that’s almost pure mental math and a short behavioral conversation follows, and the final step is a long onsite day at PEAK6’s Chicago office with five to eight interviews back to back. This track rewards speed and composure under a clock more than it rewards elegant code.
Public detail on hiring for PEAK6’s portfolio companies is thinner, because Apex Fintech Solutions, We Insure, Zogo, and Bruce Markets each recruit somewhat independently under their own names even though PEAK6 owns or backs them. What’s consistent across the reports that do exist is a more conventional software-engineering loop: a recruiter conversation, a coding or take-home round, a system-design discussion scoped to whatever that company’s product actually does (clearing, insurance quoting, payments, a trading venue), and one or more behavioral rounds about ownership and how you work. If you’re not sure which entity you’re interviewing with, ask the recruiter directly early on — it changes how you should prepare.
What they actually ask
- Medium-difficulty coding problems through a HackerRank online assessment, then live coding again in the onsite loop, with follow-up questions on complexity and why you chose a given data structure.
- System design scoped to whatever the team builds: a matching or clearing pipeline, an API that stays reliable under bursty load, an order-routing or execution service, or a quoting engine if you’re talking to the insurance side.
- Probability and expected-value problems for trading-adjacent roles, including bet-sizing questions and problems where you’re handed extra information and pencil and paper rather than asked to solve everything in your head.
- Timed mental math: quick arithmetic, percentages, and simple multiplication/division under a hard time limit, meant to test speed and calm rather than technique.
- Fermi-style estimation questions (“how many X fit in Y,” market-sizing prompts) used to see how you break down an unfamiliar problem out loud.
- A non-coding technical conversation covering language fundamentals, APIs, networking basics, or how you’d debug a production issue.
- Behavioral questions about a project you owned end to end, a technical trade-off you made and why, how you handle a fast pace, and — for roles tied to the trading floor — whether working evening or extended hours to cover market activity fits your life.
Levels and comp (2026)
PEAK6 titles engineering roles the way most trading and fintech firms do: Software Engineer I/II, Senior Software Engineer, and Staff Software Engineer, with separate ladders for trading, quant development, and product-facing fintech work. Public compensation data is limited and skews toward the trading-technology side, since portfolio companies report separately or not at all. Levels.fyi lists a median total-compensation figure for a PEAK6 software engineer in the US in the mid-$180Ks, with reported packages reaching into the low-to-mid $200Ks at the senior end, and separate data for full-stack roles trending lower, closer to the $150K median. Chicago-area figures track close to the national numbers. None of this should be treated as a firm offer number — bands vary by level, location, and which PEAK6 entity is hiring, so check levels.fyi and Glassdoor for current, role-specific data and ask your recruiter directly for the base, bonus structure, and any equity or profit-sharing tied to trading performance before you evaluate an offer.
Prep priorities
If you’re interviewing for a role on the trading-technology side, split your prep between two things: mechanical speed and system judgment. Drill mental math and expected-value problems until they’re fast and automatic — a timer-based practice routine matters more here than it does at most software shops. Alongside that, keep your coding sharp at a medium Leetcode level and be ready to talk through a low-latency or execution-system design, since interviewers want to see you reason about trade-offs in a system where milliseconds and correctness both matter. Read up on basic options mechanics if you don’t already know them; you don’t need to trade, but you should understand what the systems you’d be building actually support.
If you’re interviewing at Apex Fintech Solutions, We Insure, Zogo, Bruce Markets, or through PEAK6 Strategic Capital, prepare more like you would for any mid-size fintech company: solid data structures and algorithms at a medium level, comfort with system design fundamentals like queues, caching, idempotency, and API contracts, and a couple of well-rehearsed project stories that show you can own something from design through production. Because these are smaller, product-focused teams inside a larger parent, be ready to explain why you want to build at that scale rather than at a big-name trading firm, and have specific questions ready about which PEAK6 business unit actually owns the roadmap for your team.
Across both tracks, prepare clean behavioral answers using a structured format, and go in knowing PEAK6’s own story — a 25-plus-year options trading firm that also spun out one of the larger clearing infrastructure providers in retail brokerage, and that keeps building new companies internally. Interviewers notice when a candidate clearly understands what business they’re actually joining.
Frequently Asked Questions
Is PEAK6 a trading firm or a startup studio?
Both, and that’s the point of the company. PEAK6 Capital Management is a proprietary options trading business built in 1997, and PEAK6 Strategic Capital is a separate venture arm that has built, bought, or turned around more than 200 businesses over the years, including Apex Fintech Solutions, Zogo, We Insure, and Bruce Markets. Which one you’re interviewing with changes what the process looks like.
Will I get brainteasers and mental math questions?
If you’re interviewing for a role connected to trading or quant work, yes — expect timed mental math, expected-value problems, and Fermi-style estimation on top of coding. If you’re interviewing for a straightforward software-engineering role at one of PEAK6’s portfolio companies, the reports available suggest a more standard loop focused on coding and system design instead.
What’s the difference between PEAK6 Capital Management and Apex Fintech Solutions?
PEAK6 Capital Management is the original options trading business and owns the low-latency trading and execution systems. Apex Fintech Solutions is a separately branded clearing and custody infrastructure company that PEAK6 built out of a 2012 acquisition; it now serves outside brokerages as clients. Both sit under the PEAK6 umbrella but hire, and interview, somewhat independently.
How hard is the PEAK6 software engineer interview?
Glassdoor puts the difficulty for software engineer candidates around 2.9 out of 5, with an average time-to-hire near 19 days. That’s in line with a mid-size trading and fintech employer: a real coding bar, but not the multi-month gauntlet you’d see at the largest quant funds.
Where is PEAK6 actually based now?
PEAK6 has been moving its headquarters toward Austin, Texas, while keeping a large presence in Chicago, where the trading business started and still operates, plus an office in New York and a development team in Budapest. Confirm the location tied to a specific opening before you assume it’s Chicago.
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