Machine Learning Engineering Intern, Recommendations & Incentives

  • San Francisco, CA, USA
  • Employees can work remotely
  • Intern

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, available and accessible, at Cash App you'll have the opportunity to make a real-world impact with your career.

Remote Work

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. 

Job Description

This opportunity is only open to students who are currently enrolled in either an undergraduate, Masters or PhD program and offers an 4-month term (with a possibility for extension) on Cash App's Machine Learning Engineering team starting in Fall of 2022. If you've already graduated (or are set to graduate before the end of 2022) please apply to one of our full-time roles.

Machine Learning is an integral part of how we design products, operate, and pursue Cash App’s mission to serve the unbanked as well as disrupt traditional financial institutions. Our massive scale and deep trove of transaction data create an endless number of opportunities to use artificial intelligence to better understand our customers and offer new products and experiences that can improve their lives. We are a highly creative group that prefers to solve problems from first principles; we move quickly, make incremental changes, and deploy to production every day. 

This internship is part of our Cash App's Recommendations & Incentives Machine Learning team (RIML). This team provides an ML-powered recommendation services platform that works for the entire gamut of our Product Abstractions and enables Cash to make creative and personalized customer experiences.

Over the course of your term, you will:

  • Design ML pipelines and services as well as prototype new approaches and productionize solutions at scale for our 40+ million active users
  • Help build a platform for enabling ML-based recommendations and personalization use-cases across Cash App
  • Apply ML and engineering best practices to shape how Cash App develops, tests and maintains ML-platform solutions
  • Help design and execute our long-term Machine Learning strategy across Cash App


We value general engineering skills and versatility over existing domain knowledge, but here’s a sample of what we currently use:

  • Python, Kotlin and Java 
  • Tensorflow and PyTorch 
  • AWS, GCP
  • Elasticsearch, DynamoDB, Kafka, Apache Beam and Google DataFlow
  • SQL, Tableau & Mode


You have: 

  • Active study in an undergraduate or graduate degree in Computer Science, Computer Engineering, or a related technical field
  • Experience in software development and demonstrated technical initiative and leadership on previous projects
  • Curiosity and a passion for Cash App's mission of economic empowerment 
  • A desire to be hands-on and help invent the future of AI
  • Experience or knowledge in ML is helpful but not a prerequisite: if you are a solid software engineer, then we are happy to train you up

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, 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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