Pros: Lots of smart people For a software developer, great opportunities in high-performance computing Casual dress including shorts between Memorial and Labor days Great Xmas party

Cons: Free lunch is great in the beginning until (1) you put on the "freshman 15" and (2) they become so repetitive that you end up seeking a referral from your doctor for a cure from boredom.

Pros: Smart people Strong senior management Performance oriented Encourages learning Stable company

Cons: There was some duplication of effort across the firm.

Pros: - Very smart, hard working, caring employees - Lots of interesting technology (low latency, big scale or high uptime) - Good technical autonomy (anything is on the table as long as the ROI is right) - Motivated people can move around in the company to stay interested - Decent work life balance (better than most of Wall St, or so I've heard) - Many on-site amenities (big gym with lots of showers, car mechanic pickup) - Great location just outside of Philadelphia (one mile off the beautiful Schuylkill river trail, perfect for bike commuting) - Common sense approach to management (remoting in to stay home with a sick kid can be fine) - Great compensation for the area - Strong rational decision making culture - Very flat structure (not much overhead)

Cons: - Compliance with financial regulations includes monitoring and recording all outside communications. - The firm takes a conservative approach to intellectual property, where all code stays on-site and there are no open source contributions. - Trading hours aren't flexible, as being in the office to support 9:30-4 trading is a priority. - There are some management growing pains as the firm gets bigger. - The structure is very flat, which means there is not much clear advancement.