Software Engineer (Fullstack/Frontend), Web Payment Experience

  • San Francisco, CA
  • Employees can work remotely
  • Full-time
  • Alternate Location: New York, United States

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

The Web Payment Experience team builds JavaScript SDKs and complementary UIs for developers who want to take payments with Square on their websites. Thousands of developers use our code to power the payments capabilities that millions of merchants depend on. We build the tools to make that not just possible, but also easy. Just like front-end frameworks like React and Vue make it easier to build complex single-page apps, we’re building frameworks to simplify the complexity of taking payments. 

Want to learn more? See what we’ve built so far at (and think about all the ways you can help make this experience better).

As a software engineer on the Web Payment Experience team, you will…

  • Design and develop the JavaScript APIs and UI responsible for 1st and 3rd party developers’ experiences using our platform
  • Develop and maintain the APIs for our tokenization platform
  • Work with server side engineers to build features end to end
  • Mentor other engineers and contribute to the direction of the team
  • Build experiences for thousands of developers and millions of Square Merchants
  • See the big picture to design robust experiences so the team can be brave and move fast, without showing a negative impact to customers 
  • Be a student of the web and browsers, keeping up to date with frontend engineering trends and best practices


You Have:

  • 2+ years of industry experience
  • A desire to build Square's developer platform, where we succeed when our merchants and developers succeed
  • Experience with and an understanding of how to successfully lead complex projects, breaking down the work into components and milestones that can easily be picked up by other engineers
  • A deep enjoyment for writing and shipping production software
  • The ability to identify ways to quickly prototype complex ideas
  • A desire to focus on delighting our 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. 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, 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.


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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