Square, Inc. | Software Engineer, Mobile Security | New York (preferred), San Francisco (for senior or exceptional candidates) | <a href="
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.
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What we do:
research iOS and Android attacks and countermeasures
build backend services 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
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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.
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Who we're looking for:
reverse engineers familiar with C
mobile engineers familiar with C and with Android or iOS internals
backend engineers
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Tech we use:
C, Java, Objective-C, Python, Ruby
MySQL, Vertica, Spark
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If this matches your background and interests, we'd love to talk to you -- email me at REDACTED_EMAIL.