Senior Security Software Engineer, Access Engineering

  • San Francisco, CA
  • Employees can work remotely
  • 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

As a Security Software Engineer on the Access Engineering team, the services you design and build will protect Square’s most valuable assets and provide a great user experience to authorized Square employees around the world. In this role, you will work with many teams across the company, including other teams within security, as well as platform engineering, IT, and Data Security Governance. 

On Access Engineering we strive to provide engineering solutions and access control experiences which balance the practical challenges of compliance with our high bar for security. We believe in the zero trust security model, and are always looking for ways to improve our access control platforms.

You will:

  • Design, develop, and own zero trust authorization platforms for Square’s evolving corporate and production landscapes. 

  • Scale your impact through building access control primitives that engineering teams across the company can leverage in their systems to improve their security posture

  • Lead multi-person projects and across engineering teams and stakeholders that reduce access risk 

  • Contribute to our internal web application that enables users across the company to understand and manage their access. 

  • Contribute to the monitoring and stability of our team’s existing engineering solutions.

  • Provide mentorship and guidance to level up your teammates. 

  • Work in any Square office location, or work remotely in the USA or Canada. Occasional travel may be required.



You have:

  • Demonstrated success architecting and building secure systems with broad company impact

  • Demonstrated technical initiative and leadership

  • A high bar for writing scalable, robust, and testable code 

  • A strong desire to perform and grow as a security engineer and educate other engineers


Even better:

  • Familiarity with authorization technologies such as Open Policy Engine or Zanzibar

  • Experience breaking secure systems

  • Experience with service mesh architectures and/or Envoy


Technologies we use and teach:

  • Ruby, Rails, and RSpec

  • Java 

  • MySQL


Additional Information

We’re working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace. Square is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, veteran status, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class. 

We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process. We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible.

Additionally, we consider qualified applicants with criminal histories for employment on our team, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.


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
  • Paid time off
  • Learning and Development resources

Square, Inc. (NYSE: SQ) builds tools to empower businesses and individuals to participate in the economy. Sellers use Square to reach buyers online and in person, manage their business, and access financing. Individuals use Cash App to spend, send, store, and invest money. And TIDAL is a global music and entertainment platform that expands Square's purpose of economic empowerment to artists. Square, Inc. has offices in the United States, Canada, Japan, Australia, Ireland, Spain, Norway, and the UK.

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