Senior Software Engineer - ML Platform

  • Chicago, IL
  • Employees can work remotely
  • Full-time

Company Description

Square builds common business tools in unconventional ways so more people can start, run, and grow their businesses. When Square started, it was difficult and expensive (or just plain impossible) for some businesses to take credit cards. Square made credit card payments possible for all by turning a mobile phone into a credit card reader. Since then Square has been building an entire business toolkit of both hardware and software products including Square Capital, Square Terminal, Square Payroll, and more. We’re working to find new and better ways to help businesses succeed on their own terms—and we’re looking for people like you to help shape tomorrow at Square.

Job Description

Square's ML Platform group has one goal: make machine learning at Square easy. Square has over 100 engineers and data scientists building machine learning solutions, and our group's job is to support these efforts. We build model development tools, feature computation infrastructure, and high-scale serving systems to ensure that those trying to use machine learning can spend less time on infrastructure and more time delivering value.

The Machine learning Evaluation team makes ML actionable, i.e., enable actions ("automated decisions") based on a prediction or decision. We make the platform easier to onboard, scalable, and sophisticated to support hundreds of model types and rules capabilities. We build systems to handle the processing load of all payments at Square while also being flexible enough to help data scientists from many teams do their jobs.

We sit in a unique spot as a platform team since we work with data scientists, engineers, and product managers from across the organization. We learn directly from our customers and build software that improves their productivity and capabilities. 

We're looking for engineers to help us continue building Square's ML platform.

You will:

  • Build tools and systems that make data scientists happier and more productive

  • Build scalable systems that can host and execute hundred of ML models in realtime

  • Work with product, data science, and engineering teams throughout the organization to understand their needs and solve their problems.

  • Provide technical leadership to architect and design our platform is performant, fault-tolerant, and maintainable.

  • Coordinate system design across multiple engineering and ML teams at Square

  • Mentor your teammates and assist engineers on other teams who integrate with our platform

  • Follow the latest industry trends and constantly look for opportunities for the team 

Technologies you will use:

  • Java, Python, GCP, AWS, and Snowflake

  • MySQL, Redis, Hibernate, jOOQ, Bigtable, and React


  • 8+ years of software engineering experience

  • Specialist with experience designing and deploying large-scale distributed systems 

  • Experience developing in Java, Ruby, Python, and/or Go.

  • Experience in ML technologies  

  • Strong experience with cloud (AWS and/or GCP)

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. Square 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, 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, and always assess candidates on an individualized basis.


We want you to be well and thrive. Our global benefits package includes:

  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Paid time off
  • Learning and Development resources

Square, Inc. (NYSE: SQ) builds tools to empower businesses and individuals to participate in the economy. Sellers use Square to reach buyers online and in person, manage their business, and access financing. Individuals use Cash App to spend, send, store, and invest money. And TIDAL is a global music and entertainment platform that expands Square's purpose of economic empowerment to artists. Square, Inc. has offices in the United States, Canada, Japan, Australia, Ireland, Spain, Norway, and the UK.

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