Senior Security Software Engineer, Identity and Access Management

  • San Francisco, CA, USA
  • Full-time

Company Description

Square builds common business tools in unconventional ways so more people can start, run, and grow their businesses. When Square started, it was difficult and expensive (or just plain impossible) for some businesses to take credit cards. Square made credit card payments possible for all by turning a mobile phone into a credit card reader. Since then Square has been building an entire business toolkit of both hardware and software products including Square Capital, Square Terminal, Square Payroll, and more. We’re working to find new and better ways to help businesses succeed on their own terms—and we’re looking for people like you to help shape tomorrow at Square.

Job Description

At Square, our merchants' trust is everything. Keeping their money and data secure is required to earn that trust. The Identity and Access Management (IAM) team is part of Information Security (InfoSec); we write software that mediates access to internal services. As a team, we value correctness, safety, and efficiency. We're looking for a Security Software Engineer who shares our values.

As a Security Software Engineer on IAM, you will oversee the building and management of the services and infrastructure that control access to internal services at Square. We believe in the zero-trust security model; the IAM team grows Square's internal BeyondCorp solution. The services you build will protect Square’s most valuable assets and provide a great user experience to authorized Square employees around the world. You will report to our Infrastructure Security & IAM Manager.


You will:

  • Develop authentication and authorization services for Square.
  • Build great user experiences for internal web applications.
  • Work with many teams in multiple locations to provide a secure production environment.
  • Participate in an on-call rotation for IAM services.
You have:
  • 5+ years of professional programming experience.
  • Oncall experience and other operational experience with software at scale.
  • Experience working with security/infosec and an interest in growing your security skills.
Even better:
  • Full-stack experience with Ruby on Rails.
  • Familiarity with Beyond Corp concepts and implementations.
Technologies we use and teach:
  • Linux/ Unix Security
  • Ruby, Rails, and RSpec
  • MySQL
  • JavaScript and React

Additional Information

At Square, we value diversity and always treat all employees and job applicants based on merit, qualifications, competence, and talent. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us by sending an email to assistance(at) We will treat your request as confidentially as possible. In your email, please include your name and preferred method of contact, and we will respond as soon as possible.


At Square, we want you to be well and thrive. Our global benefits package includes:
  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Flexible time off
  • Learning and Development resources