Senior Software Engineer, Product Security

  • New York, NY
  • Employees can work remotely
  • Full-time
  • Alternate Location: San Francisco, United States
  • Position open to remote: Yes

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 Engineer embedded into the Ecommerce Platform, you will:

  • Be the main driver for Ecommerce platform security efforts
  • Integrate the Ecommerce Platform with existing security offerings provided across the Square Security organization and introduce new solutions where needed
  • Collaborate with other security teams and security partners to influence roadmaps and prioritization in the areas such as
    • Web Security, Application Security
    • Spam and product abuse
    • Authentication & Authorization
    • Cloud- and Network infrastructure
  • Identify opportunities to enable the whole Seller ecosystem to operate safely


You have:

  • At least 5-7 years of relevant professional experience
  • Experience in design & implementation of complex software solutions
  • Demonstrated technical initiative, good communication skills and leadership
  • Broad understanding of security problems and mechanisms to mitigate them paired with up-to-date knowledge on network- and service infrastructure
  • Strong desire to perform and grow as a security engineer, and mentor other engineers

Technologies relevant to your work with Ecommerce:

  • PHP, Java, Golang, Ruby
  • AWS, Docker, Kubernetes
  • Bonus for knowledge in SPIFFE/SPIRE & Envoy

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
  • Paid time off
  • Learning and Development resources