jqmp

C++ is more expressive and allows much more abstraction than C. For a long time C++ was the only mainstream language that provided C-level performance as well as rich abstractions, which is why it became popular in fields that require complex domain modeling, like HFT, gamedev, and graphics. (Of course one can debate whether this expressivity is worth the enormous complexity of the language, but in practice people have empirically chosen C++.)

FYI, this is false. These HFT firms are subject to the same regulation as other brokers, which is extensive. In particular, it's explicitly forbidden to front-run pending customer orders, or to share any information about them with the proprietary side of the firm. In my experience, these firms take these rules very seriously.

This is just the base rate, not the final prediction. Your actual prediction can incorporate any information you want, but the base rate gives you a starting point and a sanity check.

Also, as the article notes, scholars like Tetlock have studied the the track record of scholars and experts and found them to be less accurate than this type of approach.

Yes, there may be some markets where Square doesn't support PINs. I took your comment to mean that Square doesn't support PINs at all, and that it's because of a physical security requirement. I couldn't resist responding to that, since neither of those has been true for a while.

Square does support PIN entry: you just enter the PIN into the touchscreen of the mobile device. Square developed a way of securing the PIN that doesn't require dedicated hardware. (It's now a PCI security standard: "Software-based PIN Entry on COTS".)

Square | Security Engineering Manager | New York City | ONSITE | Full-time

Square's Mobile Security team is hiring in our SoHo, NYC office. We're a full-stack engineering team building Square's software tamper detection and remote attestation system.

What we do:

  * research iOS and Android attacks and countermeasures
  * build infrastructure to filter and analyze system-level telemetry from the millions of devices running our software
  * develop heuristics and models to detect malicious activity
  * collaborate with Square's mobile, hardware, and anti-fraud teams

Why it's cool:

  * we work across many disciplines: security, mobile, backend, data infrastructure, data science
  * our system is critical: without it, some Square products couldn't exist
  * several companies have built systems like this; ours is the most advanced
  * we catch real hackers and criminals

Who we're looking for:

  * an engineering manager with a background in security or detection systems

If this sounds like you, we'd love to talk. Email me at [email protected].

Square | Mobile, Backend, Security | NYC, New York | ONSITE | Full-time | VISA sponsorship/transfer OK

Square's Mobile Security team is hiring in New York. We build the technology that ensures our sellers’ mobile devices are safe for Software PIN in Chip and PIN markets. We are a full-stack engineering team responsible for in-app remote attestation for Android and iOS, back end tamper response services, data platform, and anomaly detection. We stay on top of mobile security vulnerabilities, threats, and attacks in the wild to design and implement detections.

We're looking for reverse engineers; server engineers; and mobile engineers familiar with iOS or Android internals. If your background is in any of these, we'd love to talk. Email me at [email protected].