Sr Fraud Data Scientist, Fraud Risk

  • 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 app, bringing a better way to send, spend, invest, borrow and save to our millions of monthly active users. With a mission to redefine the world's relationship with money by making it more relatable, instantly available and universally accessible, at Cash App you'll have the opportunity to make a real-world impact with your career.

Today, Cash App has thousands of employees around the world with a culture geared toward creativity, collaboration and impact. We’ve been a distributed team since day one, and continue to value working across time zones and continents both remotely and in our Cash App offices.

Our offices are great, but many of our roles can be done remotely from the countries where Block operates. We tailor our experience to champion our employees’ creativity and productivity wherever they are.

Check out our locations, benefits and more at

Job Description

The Fraud chargeback solution team in Afterpay is mainly responsible for flash fraud detection and chargeback representment strategy.

As a Senior Fraud Data Scientist at Afterpay, you’ll be responsible for key KPIs for the company's loss metrics, and customer experience metrics. You will be tasked to set goals, create strategy, and closely collaborate with product managers, engineers and business stakeholders. You’ll be responsible for detecting changed fraud trends, writing rules with summarized patterns and closely monitoring the solution performance.

You will:

  • Maintain and further refine the fraud strategy framework, including fraud model strategies and flash fraud surgical rules

  • Build and refine fraud model strategy automation process to keep the model strategy up-to-date with high performance

  • Review cases daily to timely capture flash fraud trends with quick response to stop loss leakage

  • Swiftly respond to system issues and deep dive into root cause analysis

  • Master large volumes of data; extract and manipulate large datasets using standard tools such as SQL and Python


You Have: 

  • A minimum of 5 years experience in quantitative statistics, math, business, or related disciplines

  • Experience in fraud risk solutions is highly desirable

  • Experience in data mining and analysis tools such as Python/ SQL etc

  • A strong understanding of fraud patterns, including ATO or stolen CC.

  • Exceptional time management skills, the ability to multi-task and triage the evolving responsibilities of the role

  • Good communication skills and the ability to understand and synthesize requirements across multiple project domains

  • An appreciation for the connection between the software you build and the experience it delivers to customers

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. Block is a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, based solely on the core competencies required of the role at hand, and without regard to any 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

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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