Senior Software Engineer (Frontend), Web Point of Sale

  • San Francisco, CA
  • Full-time

Company Description

When we launched the little white reader, we invented mobile, ubiquitous payments and enabled anyone to start, run, and grow a business. Ten years and billions of transactions later we’re reimagining commerce for businesses of all types and sizes—we’re enabling the independent electrician to send invoices, helping the beauty salon pay its employees, and giving the burgeoning coffee chain capital for a second, third, and fourth location. 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

While Square is best known for the Point of Sale applications that run natively on iOS, Android and Square-branded hardware devices, Square’s mission is that “everyone should be able to participate and thrive in the economy.” This includes merchants for whom it does not make sense to purchase a dedicated device to accept payments. Enter the Virtual Terminal product, owned by the Web Point of Sale team, which allows merchants to take payments through a web interface on the computers they already own and use to run their businesses. 

To learn more about the Virtual Terminal product:

As a Senior Frontend Engineer on the team, you will...

  • Add functionality to the Virtual Terminal product to serve and expand its user base in service of Square’s mission;
  • Help optimize the web onboarding experience for Square users, ensuring that new users are introduced to the most relevant products for their needs;
  • Work closely with product managers, designers and fellow engineers to ensure that Square delivers a comprehensive and cohesive web-based product to end-users.


You have:

  • Excellent software engineering aptitude and the ability to provide technical mentorship and guidance.
  • Strong communication skills and ability to work cross-functionally with designers, product managers, data scientists, marketing, and business development to deliver a great product.
  • A strong sense of customer empathy and desire to influence the product direction.
  • Experience working in large front-end codebases.
  • Strong knowledge and experience with modern JavaScript, HTML, and CSS.
  • Familiarity with popular JS-app frameworks (Ember.js, React, Vue.js, Angular, etc.).
  • Experience in testing your code (QUnit, Mocha, Jasmine, Capybara, etc.).
  • 5+ years professional experience.

Web technologies we use:

  • ES6 JavaScript
  • Ember.js / QUnit
  • SCSS

Additional Information

At Square, our purpose is to empower – within and outside of our walls. In order to build the best tools for the businesses and customers we support all over the world, we have to start at home with a workforce as diverse and empowered as our sellers. To this end, we take great care to evaluate all employees and job applicants equally, based on merit, competence, and qualifications. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or any other characteristic protected by law. We encourage candidates from all backgrounds to apply and always consider qualified applicants with arrest and conviction records, in accordance with the San Francisco Fair Chance Ordinance. Applicants in need of special assistance or accommodation during the interview process or in accessing our website may contact us by sending an email to assistance(at) We will treat your request as confidentially as possible. In your email, please include your name and preferred method of contact, and we will respond as soon as possible. Perks At Square, we want you to be well and thrive. Our global benefits package includes: Healthcare coverage, Retirement Plans, Employee Stock Purchase Program, Meal reimbursements, Wellness perks, Paid parental leave, Flexible time off, Learning and Development resources