Senior Software Engineer (Front-end), Payroll

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

Company Description

Since we first opened our doors in 2009, the world of commerce has evolved immensely – and so has Square. After enabling anyone to take a payment and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together. So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage inventory, run a busy kitchen, book appointments, engage loyal buyers, and hire and pay staff. And across it all, we’ve embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow all in one place.

Today, we’re a partner to sellers of all sizes – large, enterprise-scale businesses with complex commerce operations, sellers just starting out, as well as merchants who began selling with Square and have grown larger over time. As our sellers scale, so do our solutions. We all grow together.

There is a massive opportunity in front of us. We’re building a business that is big, meaningful, and lasting. And we are helping sellers around the world do the same.

Job 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 re-imagining commerce for businesses of all types and sizes—we're helping the independent electrician 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.

Much in the same way that Square revolutionized payments, we want to radically alter how employees get paid and businesses manage their finances. Our mission is to make running a business simple and personal by applying automation and an excellent user-experience. Our small collaborative team has already built many foundational features and are now focused on improving and experimenting beyond a traditional payroll product. We want to transform the lives of people that make their living through our platform. We're a growing part of the Square ecosystem and are using our position to build products and features that are beyond the capabilities of our competitors.

We are an expanding team with an abundance of growth and influence opportunities. We are building the best full featured payroll solution for small businesses with an emphasis on design and automation. At the same time we are doing this in an organized and scalable way, making smart choices about how to automate important functions.

You Will:

  • Work with other engineers, designers, and product managers to develop features from prototype to launch.
  • Oversee the entirety of your features; including component design, implementation, automated testing, and roll-out.
  • Provide technical guidance to an amazing group of engineers, and teach us front-end development best practices.
  • Contribute to the leadership, stewardship, planning, and evangelism of our modern React-based front-end architecture, which has achieved several firsts within the Square front-end community.
  • Build systems that collect and maintain customers sensitive data, while holding Square to the highest standards for security and compliance.
  • Stay curious, ask questions when you need help, and have a voice in the future of our road-map.


You Have:

  • Excellent software engineering knowledge and the ability to provide technical mentorship and guidance.
  • The ability to work with other roles such as designers, product managers, data scientists, marketing, and business development, to bring together a great experience-driven product.
  • Experience working in large front-end codebases.
  • The ability to write JavaScript, both in its raw form and with common JavaScript libraries (jQuery, Underscore)
  • Familiarity and expertise with at least one modern JavaScript-app framework (e.g. React, Vue.js, Ember, Angular, or Svelte)
  • Experience testing your code with a modern JavaScript testing framework (e.g. Jest, QUnit, Mocha, Jasmine, or Capybara)
  • Experience with modern web capabilities and concepts, such as accessibility, performance,
  • 5+ years professional experience.

Preference given if you also have any of the following:

  • Experience with React
  • Familiarity with common React patterns and their trade-offs, e.g. higher-order components or render props
  • Experience leading complex technical projects, e.g. cross-team programs or migrating from a legacy to more modern tech stack

Technologies we use:

  • JavaScript / ES6 / React / Ember.js
  • Ruby / Rails / MySQL / Redis

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

Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD54566975, 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. TBD54566975 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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