Senior Software Security Engineer

1 month ago

Seattle, Washington, United States Cash App Full time

Company Description It all started with an idea at Block in 2013. Initially 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 ecosystem, developing unique financial products, including Afterpay/Clearpay, to provide a better way to send, spend, invest, borrow and save to our 47 million monthly active customers. We want to redefine the world's relationship with money to make it more relatable, instantly available, and universally accessible. Today, Cash App has thousands of employees working globally across office and remote locations, with a culture geared toward innovation, collaboration and impact. We've been a distributed team since day one, and many of our roles can be done remotely from the countries where Cash App operates. No matter the location, we tailor our experience to ensure our employees are creative, productive, and happy. Check out our locations, benefits, and more.

Job Description About Cash Security At Cash, security is everyone's responsibility, especially among engineering disciplines. Cash Security is a multidisciplinary team, closely aligned to the needs of the business. The team is composed of multiple engineering and governance teams, each specializing and collaboratively solving the security, privacy and governance needs alongside their partner organizations.

About Product Security Engineering The Product Security engineering team focuses on protecting Cash App's customer data throughout the product engineering's technology stacks. We are a hands-on, engineering-driven security team, which aligns security engineers toward product teams, across the entire Cash App organization. We continually raise the overall trust of Cash App's products by building high leverage security abstractions into the technology stacks our partners utilize. We collaborate on building these security infrastructures, design patterns, and guidelines. We accomplish our goals by treating security engineering as a discipline, offering our expertise to technical and non-technical stakeholders. We secondarily abstract bespoke security solutions into reusable infrastructure, sharing our learnings, best practices, and solutions across the organization. Our mission is to empower Cash engineers to protect our customers' data in every aspect of the product and data life cycle; by providing reusable primitives and scalable platforms.

As a Product Security Engineer, you'll work within the product engineering organization to: - Work with product teams to threat-model Cash App features and identify vulnerabilities. - Design, build, and own the security & privacy mechanisms and features which support product engineering teams and customer operations. - Drive the direction of the organization by productionizing common security patterns and working toward our security roadmap. - Design, apply, and develop security primitives to protect data. - Identify and remedy potential security risks to our customers' data. - Partner with product teams to implement relevant regulatory data privacy considerations. - Help the engineers around you level-up on their own security reasoning and knowledge.

Examples of our previous work include:

  • CashApp's open source mobile client security SDK [GitHub]
  • General purpose multi-party authorization framework
  • Context aware audit logging functionality
  • Drive the adoption of policy as code
  • Cash's Field Level Encryption (FLE) framework [Blog]
    Qualifications You have:
  • 8+ years of relevant experience
  • Experience demonstrating technical initiative and leadership through the end-to-end delivery of products in the security space
  • You enjoy solving problems at scale, through hands-on problem solving
  • Strong desire to perform and grow as a security engineer and educate other engineers
  • An interest in working on a product that impacts people/businesses directly
  • You have an aptitude for applied cryptography, security, and strong software engineering fundamentals
    Tools we use and teach:
  • AWS KMS and Google's Tink Cryptographic APIs
  • Android / iOS mobile development
  • Java 11 including JUnit, Hibernate, and Guice
  • Kotlin
  • HTTP, JSON, gRPC, and Protocol Buffers
  • MySQL, DynamoDB
  • Operating microservices, Kubernetes, Terraform
    US and Canada EEOC Statement 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. Block is a proud equal opportunity employer. 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. Block, Inc.
(NYSE:

SQ) is a global technology company with a focus on financial services.

Made up of Square, Cash App, Spiral, TIDAL, and TBD, we build tools to help more people access the economy.

Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services.

With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans.

TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.

While there is no specific deadline to apply for this role, on average, U.S. open roles are posted for 70 days before being filled by a successful candidate.

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