San Francisco, CA Fulltime Security Engineer, Security Intern
At Square (squareup.com) we're looking for security experts excited about securing the future of payments. Security at Square is involved in all aspects of the stack: hardware, firmware, mobile, infrastructure, networks, crypto, web, and physical security. The team is equal parts builder and breaker, but we spend most of our effort building security infrastructure and libraries.
Some specific positions we'd love to fill:
  Network Security Engineer

  Mobile Security Engineer

  Software Engineer w/ interest in Security

Standing invitation to all security folks in the Bay Area or visiting: come have lunch with us at Square. We'd love to meet you and talk about what you're working on. It is almost certainly relevant to us.
Contact me: mccauley [at] squareup.com
Ask HN: Who Is Hiring? (October 2012) 