Sr. Software Engineer, Product Security



Denver, CO
Full Time
3y ago

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

The Product Security Engineering team identifies and mitigates unacceptable risk to Square’s products in order to protect our users. We engage in cross-functional collaboration across a wide range of organizations in order to implement security mechanisms into the company’s tech stack. We rely on data to scope problems, work with multiple teams to understand what solution will make the best impact, and drive the delivery from design to implementation.

We are excited to hire a Senior Software Engineer, Security to lead our efforts aimed at protecting Square’s APIs. In this role, you will work with different groups across the company to address a set of ambiguous security challenges by collecting and analyzing data, proposing solutions in the form of engineering designs based on the findings and own the delivery.

You will:

  • Identify conceptual security risks across our API endpoints in the area of authN, authZ as well as network level attacks

  • Scope and design solutions that protect Square’s APIs throughout their lifecycle

  • Implement reliable software within our network stack or related systems

  • Influence stakeholders across teams to get buy-in for your solution

  • Evaluate potential vendor solutions when applicable, make build vs. buy recommendations

  • Act as a force multiplier when driving projects in a collaborative environment


You have:

  • The ability to break down complex projects into components or milestones that can easily be completed by other engineers

  • Software development experience in at least 1 language like Java, Go, or C++

  • Experience leading or overseeing large projects from start to finish

  • Built and operated highly available distributed systems

Nice to have:

  • Deep knowledge about network & internet security challenges and how to address them

  • Operated and debugged proxy technologies like Envoy or similar (e.g. Nginx, HAProxy)

  • Familiarity with some of the following technologies we use every day: AWS, GCP, Kubernetes, gRPC, Envoy, GraphQL

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, 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. Want to learn more about what we’re doing to build a workplace that is fair and square? Check out our I+D page

Additionally, we consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis.


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.

Apply for this job

Click on apply will take you to the actual job site or will open email app.

Click above box to copy link
Get exclusive remote work stories and fresh remote jobs, weekly 👇
View all remote jobs
Onkar By: Onkar