Senior Product Security Engineer, Financial Platform, Cash App

  • Melbourne VIC, Australia
  • Employees can work remotely
  • Full-time
  • Alternate Location: San Francisco, United States
  • Position open to remote: Yes
  • Current Square Employee?: Apply via go/jobs

Company Description

Cash App is the fastest growing financial brand in the world. Built to take the pain out of peer-to-peer payments, Cash App has gone from a simple product with a single purpose to a dynamic money app with over 24 million active monthly users. 

Loved by customers and by pop culture, we’ve held the #1 spot in finance on the App Store for almost two years, and our social media posts see more engagement in a day than most financial brands see in a year. 

With major offices in San Francisco, New York, St. Louis, Portland, Kitchener-Waterloo, and Melbourne, Cash App is bringing a better way to send, spend, and save to anyone who has ever sought an alternative to today’s banking system.

Job Description

As a Security Engineer on the Financial Platform team, you will help secure all aspects of financial asset transactions and movements, both within the Cash App ecosystem as well as with external financial systems and networks.

The Cash Security team is a hands-on engineering-driven security team that embeds security engineers within key platform and product teams across Cash. As a security team, we collaborate on building and sharing security infrastructure, design patterns, and guidelines.

As a Product Security Engineer embedded in the Financial Platform team, you’ll work within the Financial Platform team to:

  • Co-design, co-build, and co-own the security hardening, mechanisms, and features of our financial platforms
  • Design, apply, and develop cryptographic primitives to protect the financial integrity of Cash App
  • Evaluate the security properties and risks of 3rd-party systems and services that we would integrate into our cloud environment to advise the Cash Financial Platform team of the trade-offs
  • Help the engineers around you level-up on their own security reasoning and knowledge

Qualifications

You have:

  • A strong motivation to contribute to a meaningful product that will fundamentally change the way people interact with financial institutions
  • Strong desire to perform and grow as a security engineer and educate other engineers
  • Demonstrated technical initiative and leadership
  • An interest in working on a product that impacts people/businesses directly

Tools we use and teach:

  • AWS KMS and Google’s Tink Cryptographic APIs
  • Java 11 including JUnit, Hibernate, and Guice
  • Kotlin
  • HTTP, JSON, gRPC, and Protocol Buffers
  • MySQL
  • Event-driven architecture
  • Feature Engineering for Machine Learning

Additional Information

Cash App treats all employees and job applicants equally. Every decision is based on merit, qualifications, 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 each office’s corresponding state and city guidelines.