Senior Software Engineer, Product Security

  • 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, 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. This is our mission, and it’s why working at Cash App means so much more than a job.

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 at!

Job Description

Cash Security makes protecting data easy by building self-service APIs and governance frameworks. We collaborate with platform and product development teams across the Cash ecosystem to help them autonomously understand how to meet governance requirements, protect against malicious attacks, respect our customers’ privacy, and ultimately maintain trust. We provide guidance to our stakeholder teams around compliance, privacy, and security in order to help them confidently manage these risks within their domains while ensuring that their decisions do not have broader downsides.

On Cash Product Security, we believe that security is the responsibility of everyone, especially those who ship product solutions. We work closely with the product engineering organization to enable teams to make great security decisions on behalf of their customers. The Data Safety sub-team focuses on protecting Cash App’s most important asset: our customers’ data. We work across Cash and the Block enterprise to identify, measure and reduce risk related to handling consumer data. We protect Cash App customers from data misuse as we scale to 100M monthly active users and beyond. 

We iteratively build tools and abstractions to:

  • ensure the safe handling of data at collection time, at rest, and in transit
  • align engineering strategy with security governance goals and global compliance regime requirements
  • govern the data lifecycle 
  • highlight insights about business risks to allow teams to take action and ownership
  • empower machine learning and product engineering teams to own their data security posture with confidence
  • make the secure choice also the easy choice for other engineers


You have experience with some of the following:

  • Building security tools for other engineers to use
  • Machine learning and big data platforms and tools, including building first-party or bespoke ML infrastructure
  • Working with cross-functional stakeholders across teams, verticals, and business units, and partnering with other teams to achieve great security outcomes
  • Creating and maintaining team processes that allow the team to protect their time while satisfying our internal customers’ needs
  • High-level understanding of consumer data privacy regulations and concepts, like GDPR, CCPA, and the right to be forgotten

Our partner teams use the following tools:

Tools we teach, use, and build:

  • In-database encryption libraries for Hibernate, DynamoDB, and jOOQ
  • Homegrown open-source tools like Pivit and Trifle

Additional Information

Block takes a market-based approach to pay, and pay may vary depending on your location. U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area. The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions. These ranges may be modified in the future.

Zone A: USD $222,800 - USD $272,300
Zone B: USD $211,600 - USD $258,600
Zone C: USD $200,500 - USD $245,100
Zone D: USD $189,400 - USD $231,400

To find a location’s zone designation, please refer to this resource. If a location of interest is not listed, please speak with a recruiter for additional information. 

Benefits include the following:

  • Healthcare coverage
  • Retirement Plans including company match 
  • Employee Stock Purchase Program
  • Wellness programs, including access to mental health, 1:1 financial planners, and a monthly wellness allowance 
  • Paid parental and caregiving leave
  • Paid time off
  • Learning and Development resources
  • Paid Life insurance, AD&D. and disability benefits 
  • Perks such as WFH reimbursements and free access to caregiving, legal, and discounted resources 

This role is also eligible to participate in Block's equity plan subject to the terms of the applicable plans and policies, and may be eligible for a sign-on bonus. Sales roles may be eligible to participate in a commission plan subject to the terms of the applicable plans and policies. Pay and benefits are subject to change at any time, consistent with the terms of any applicable compensation or benefit plans.

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 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. 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, assessing candidates in a manner consistent with the requirements of the San Francisco Fair Chance Ordinance.

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.

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