Senior Software Engineer (Frontend/Fullstack), Square Staff

  • 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 Staff represents a suite of labor management, payroll and communications tools that allow sellers and their teams to excel together. You will report to the engineering lead and be focused on building and expanding our product suite to solve more seller needs related to time tracking management, tips, wages, and commissions. You will help in brainstorming, design and implementation of seller facing features and help improve our partner integration infrastructure. You will work with other engineers, designers, product managers and other teams to move quickly towards delivering and scaling a remarkable product for small business owners.  You will help us identify and deliver the plans, features and products that for our existing and potential customers. Square Staff helps give our sellers the peace of mind that their business is running smoothly, even if they're not physically present.

To learn more about the Square Staff products: 

You Will:

  • Develop, and test scalable client software complex server, network, and hardware interactions.
  • Design high availability, resilient systems which can operate no matter the network or device conditions.
  • Lead complex projects, often across team boundaries.
  • Foster a culture with team members distributed across several locations.
  • Collaborate with colleagues across engineering, product, design, and operations to provide end-to-end solutions.
  • Capture and analyze metrics to lead informed decisions.
  • Participate in the full lifecycle of product development, from early definition to planning through release and beyond.


You Have:

  • 5+ years of experience developing production software
  • 5+ years of experience building and working with APIs to deliver product features
  • Advanced Degree in Computer Science or Equivalent experience in lieu of degree
  • Experience leading or contributing to medium-to-large feature releases; 
  • Experience building component-based web apps with modern JavaScript front-end frameworks (e.g. React, Angular, or Ember).
  • Natural curiosity and desire to build products our merchants depend on.

Technologies we use and teach:

  • Front End: ES6 JavaScript, ReactJS, EmberJS
  • Backend: Kotlin, Ruby on Rails, Java

Additional Information

At Square, we value diversity and always treat all employees and job applicants based on merit, qualifications, competence, and talent. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We will consider for employment qualified applicants with criminal histories in a manner consistent with the requirements of 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.


At Square, 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
  • Flexible time off
  • Learning and Development resources

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, based solely on the core competencies required of the role at hand, and without regard to any 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.

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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