Summer 2026
Software Engineer Intern
Citadel
5,001-10,000 employees
Global hedge fund and alternatives manager
Compensation Overview
$112.50 - $145/hr
Company Historically Provides H1B Sponsorship
Greenwich, CT, USA + 3 more
More locations: Houston, TX, USA | Miami, FL, USA | New York, NY, USA
In Person
On-site internship locations only: New York, NY; Miami, FL; Greenwich, CT; Houston, TX.
 Software Engineering (1) |
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- Bachelor's, master's or PhD in computer science, computer engineering or related fields
- Exceptional programming and design skills
- Strong analytical skills and familiarity with probability and statistics
- Ability to communicate effectively in a collaborative, complex and highly technical team environment
- Intellectual curiosity and passion for solving challenging problems using technology
- Create technological tools that bring trading strategies to life
- Develop high-performance, large data research platforms
- Work in small teams to build the future of finance
Citadel is an alternative investment manager and hedge fund that oversees capital for institutional clients like pension funds, endowments, and sovereign wealth funds. It uses a team of traders to invest in global financial markets, aiming to grow client assets through speculative opportunities and risk-taking. The firm earns money mainly through performance fees (a share of profits) and management fees (a share of assets under management). Citadel differentiates itself by its track record of profitability, large assets under management, and its focus on improving transparency and resiliency in markets such as the U.S. Treasury market, along with strong risk management and civic leadership. Its goal is to generate high returns for clients while helping maintain fair, efficient markets and expanding its client base and assets under management under leadership from Ken Griffin.
Company Size
5,001-10,000
Company Stage
Private
Total Funding
$15B
Headquarters
Miami, Florida
Founded
1990
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Simplify's Take
What believers are saying
- Citadel’s flagship fund gained 5.9% in July 2026 after the Situational deal.
- Bloomberg reported Citadel’s year-to-date gains reached 12% by early August 2026.
- Dubai becomes Citadel’s 18th city in 2027, expanding recruiting and deal access.
What critics are saying
- AI crowding drives fast reversals; July 2026’s 67% Situational crash exposed leverage fragility.
- Citadel abandoned its Portofino trade-secrets suit July 8, 2026, showing costly, unresolved litigation.
- Miami megaproject execution risk remains high; construction starts in 2026, not yet revenue-producing.
What makes Citadel unique
- Ken Griffin’s all-weather balance sheet bought Situational Awareness’s leveraged AI book on July 30, 2026.
- Citadel Securities posted $4.3 billion first-quarter trading revenue, proving elite market-making scale.
- Citadel is building a $2.5 billion Brickell headquarters, signaling long-term capital commitment.
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Growth & Insights and Company News
6 month growth
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↑ 4%Citadel founder Ken Griffin purchased a portion of Situational Awareness's portfolio after the California hedge fund suffered a 67% loss in February from soured AI stock bets. The fund was forced to unwind most of its $16 billion public equities book. Griffin assembled senior Citadel executives who worked through the night to analyse Situational Awareness's trading positions and liquidity. By Thursday, Citadel had acquired part of the portfolio. Leopold Aschenbrenner, Situational Awareness's founder and former OpenAI researcher, told investors he took "full responsibility" for the losses. He said positions moved against the fund whilst market liquidity dried up. The acquisition follows Griffin's pattern of identifying distressed opportunities. Forbes estimates his personal fortune at approximately $52 billion. Representatives for both firms declined to comment on the transaction's financial terms.
Citadel buys most of Situational's stock holdings after AI share rout - Reuters. 31 Jul 2026, 03:09 pm Citadel founder and CEO Ken Griffin. NEW YORK (July 30): Situational Awareness, an AI-focused hedge fund run by former OpenAI researcher Leopold Aschenbrenner, sold the bulk of its stock portfolio to Ken Griffin's Citadel after being battered by heavy losses in its tech holdings, two sources familiar with the matter told Reuters on Thursday. Situational was forced to unwind most of its public equities portfolio, which included sizable holdings in several prominent AI names that have been rocked by the recent market selloff, the sources said, requesting anonymity as the discussions are confidential. The fund was under pressure to either raise fresh capital from investors or offload its entire book, and eventually chose the latter option, the sources added. Situational held positions in several prominent tech names including Broadcom, Intel, and CoreWeave, according to its most recent regulatory filings. Since the fund's launch in 2024, Aschenbrenner has garnered a cult-like following among investors for his prescient bets on the AI sector that propelled his fund to a lofty 439% return from the start of the year until the end of June. The fund was down around 67% so far in July after incurring heavy losses on AI stocks, the Wall Street Journal reported on Thursday, citing a source who saw a letter the firm sent to investors. Aschenbrenner blamed short sellers who targeted the firm's positions for exacerbating losses, the report said. The firm did not immediately respond to Reuters request for comment outside business hours. A number of top Wall Street prime brokers, including Goldman Sachs, JPMorgan Chase, Bank of America, and Citigroup, helped facilitate the deal between Citadel and Aschenbrenner's fund, the sources told Reuters. Griffin's Citadel, which has about US$71 billion of assets under management, is one of the world's most profitable and largest hedge funds. As part of the deal, Citadel is picking up the portion of Situational's public portfolio that was financed by leverage from brokers, the sources said. They said Situational will hold a book of roughly US$10 billion after the deal comprised of stocks as well as private investments in companies like Anthropic. Situational has not sold its stake in Anthropic, the sources said. AI meltdown. Global hedge funds are grappling with their biggest monthly drawdown on record as AI stocks have been routed across the board, erasing much of the gains from crowded bets in the sector. Asia-focused fundamental long-short funds are down 18.6% on average this month through July 28, Goldman Sachs said in a prime brokerage note sent to clients this week. Stock-picking hedge funds have been rushing to unwind their positions in AI names, as they covered short positions and sold long positions in relatively equal amounts, according to a note from Morgan Stanley's prime brokerage unit sent to clients on Wednesday. Hedge funds typically take on large amounts of leverage from lenders to take bigger swings at the markets in order to amplify their returns. However, such leveraged bets can backfire when the markets move against positions taken by funds, forcing margin calls from prime brokers. That can result in a vicious cycle, where the margin calls trigger sales, extending market downturns that beget more selling. It is not clear whether Aschenbrenner's fund faced margin calls from its lenders before striking the deal with Citadel. The hedge fund, which earlier managed about US$20 billion of assets and currently has about 20 employees, has used leverage to boost its positions in the past - much like its peers. Aschenbrenner's success attracted big-name backers like secretive trading giant Jane Street. Other investors include Stripe co-founders Patrick and John Collison, as well as Meta Platforms executives Daniel Gross and Nat Friedman. The Wall Street Journal reported the deal between Citadel and Situational earlier on Thursday. Uploaded by Liza Shireen Koshy
South Florida's top deals Palm Island home sells for $19M. From an eight-figure Palm Island waterfront sale to a billionaire moving a century-old Brickell landmark - South Florida's top end stays busy. South Florida's high end doesn't take the summer off. In the latest roundup of the region's most notable transactions, a Palm Island waterfront home traded for $19 million, and one of the world's wealthiest people made a bold move on a piece of Miami history. Here's a look at the headline deals - and what they say about the market. Palm Island waterfront sale Age of Brickell's Dr. Jackson building South Florida still in demand Palm Island home sells for $19 million. According to The Real Deal, a waterfront property at 288 South Coconut Lane on Palm Island - one of Miami Beach's exclusive guard-gated island enclaves - sold for $19 million. The home has been publicly linked to boxing champion Floyd Mayweather Jr. An eight-figure sale on a private island underscores how much appetite remains for trophy waterfront in South Florida, even as the broader market normalizes. Ken Griffin's plan for a century-old Brickell landmark. In Brickell, billionaire Ken Griffin - founder of Citadel, which is building a major new headquarters in the neighborhood - aims to relocate the historic Dr. Jackson building, a structure that has stood in Brickell for nearly 110 years, according to the South Florida Business Journal. Rather than demolish it, the plan would move the landmark to another part of Miami, a rare and expensive way to preserve history amid one of the country's most active development corridors. Free · No Obligation Curious about South Florida's luxury market? Leave your info and a Divito Real Estate agent will send current listings and an honest read on values in your target neighborhood - free. What these deals tell Divito Real Estate Group about the market. * Ultra-prime demand is intact. A $19M private-island sale signals that the very top of the South Florida market - waterfront, gated, irreplaceable land - still commands premium prices. * Capital keeps flowing into Miami. Griffin's continued Brickell investment (and willingness to move a landmark to build) is a vote of confidence in the market's long-term trajectory. * Trophy assets behave differently. While everyday buyers weigh 6.5% mortgage rates, the top of the market runs largely on cash and conviction - which is why luxury headlines keep coming. What it means for buyers and sellers. You don't need $19 million to take a lesson from these deals. South Florida's enduring demand - from relocators, second-home buyers, and international capital - is exactly what supports values across price points, from Brickell condos to Treasure Coast single-family homes. If you're buying, understand what's driving your specific neighborhood; if you're selling, know that the right pricing and positioning still win, at every level. The bottom line. Blockbuster deals like a $19M Palm Island sale and a billionaire relocating a Brickell landmark are more than gossip - they're signals that South Florida remains a magnet for people and capital. That demand is the foundation under the whole market. Whatever your price range, a local agent who tracks these moves can tell you what they mean for your street. Divito Real Estate Group South Florida & Treasure Coast Real Estate - Editorial Team Divito Real Estate Group serves buyers, sellers, and investors from Miami to the Treasure Coast. Divito Real Estate Group track the Florida market so its clients can make confident, fully-informed decisions. Thinking about a South Florida move? Get a free, no-obligation read on luxury and waterfront values in your target area. Frequently asked Questions. What sold for $19 million in South Florida? A waterfront home at 288 South Coconut Lane on Palm Island in Miami Beach sold for $19 million, according to The Real Deal. The property has been publicly linked to Floyd Mayweather Jr. What is Ken Griffin planning in Brickell? Per the South Florida Business Journal, Griffin aims to relocate the historic Dr. Jackson building - nearly 110 years old - to another part of Miami rather than demolish it, as Citadel builds a major Brickell headquarters. Is South Florida's luxury market still strong? High-profile trophy sales suggest the top end remains in demand, driven largely by cash buyers and international capital that are less sensitive to mortgage rates than the broader market. How do luxury deals affect regular buyers and sellers? They reflect the deep, durable demand that supports South Florida values across price points. Local pricing and positioning still determine outcomes at every level. Related reading. Free Florida Real Estate Calculators Run your numbers before you tour a single home - free, instant, no signup. Free · No Obligation Talk to a Divito Real Estate agent. Questions about buying or selling in Florida? Leave your info and Divito Real Estate Group'll reach out - free, no pressure.
Hedge fund Jain Global is hiring quants in London. 1 hour ago Bobby Jain's hedge fund, Jain Global, is in the habit of hiring '35-year-old killers'. It's also in the habit of hiring quants; the fund has brought in multiple quants in recent months with a particular focus on London. Paul Woodward joined Jain in London this month as a senior quantitative developer after three years at Citadel. Woodward has completed the trifecta of quant roles already; he was a quant researcher at ExodusPoint before joining Citadel, and a quant strategist at Morgan Stanley before that. It also hired Alexander Kazantsev as a senior quant researcher. He's a Russia-educated PhD mathematician who previously worked at WorldQuant which, like Jain Global, has roots at hedge fund Millennium. Most recently, he was a quant research analyst at hedge fund Graham Capital. Jain Global's quant leadership appears to be concentrated in London. The city is home to Anton Merluskin, head of quant modelling and analytics for Jain. He's another Russia-educated quant who spent a collective 25 years at Credit Suisse across two stints, separated by a short spell at ill-fated hedge fund Eisler Capital. Peter Bolland, a former Morgan Stanley MD and CIO for quantitative strategies at Jain, is also London-based. Jain is still a very young hedge fund. 2025 was only its first full year of trading, in which it posted modest returns of ~3.7%. Bobby Jain said on a podcast earlier this year that, alongside experience, more data will improve things; bolstering its quant ranks may help Jain Global put said data to good use. Have a confidential story, tip, or comment you'd like to share? Contact: WhatsApp: http://wa.me/442079977910 (+44 20 7997 7910), Telegram: @AlexMcMurray, Signal: @AlexMcMurrayEFC.88 Click here to fill in our anonymous form, or email [email protected]. Bear with us if you leave a comment at the bottom of this article: comments are moderated intermittently by human beings. Sometimes these humans might be asleep, or away from their desks, so it may take a while for your comment to appear. You must take sole responsibility for comments you post on this site. We will take reasonable steps to weed out anything that we consider to be offensive or inappropriate. The essential daily roundup of news and analysis read by everyone from senior bankers and traders to new recruits. Boost your career. Find thousands of job opportunities by signing up to eFinancialCareers today. Top Articles
Several major hedge funds are reducing their investment staff in Miami despite the city's reputation as a growing finance hub. Eight multistrategy firms — including Citadel, Millennium, Point72 and Balyasny — employed 218 investment professionals in Miami in 2025, down 20 from the previous year, even as their overall investing head count grew by over 11%. Citadel, which moved its headquarters to Miami in 2022, cut 15 investment professionals there whilst adding 77 globally. Millennium reduced its Miami presence from 53 investors to 48 and consolidated from two offices to one. Only ExodusPoint and Walleye increased their Miami investment staff. Growth is instead concentrated in New York, London, Hong Kong and Dubai, according to regulatory filings.