Principal Software Engineer, Business Identities

  • Seattle, WA
  • Employees can work remotely
  • Full-time
  • Alternate Location: San Francisco, 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 Business Identities team enables sellers to do business through Square by modeling and verifying their identities—from the smallest sole proprietor to the most complex corporations. We build platforms and services to enable sellers to use a variety of Square’s products as quickly, reliably, and painlessly as possible, starting with taking payments. This team is also investing in building public APIs for their services.

As a Principal Engineer, you will play a pivotal role in the design & development of solid infrastructure of business modeling, storing, building public APIs, documentation, and monitoring. While working on this team, you’ll get a chance to make critical technology decisions, solve massively complex problems, and develop new skills in the process. In addition, you will be results-driven and coaching teams to deliver software products at the highest levels of quality and craftsmanship.

The ideal candidate will help scale the Business Identities team as we continue to experience dramatic growth in our sellers globally.

Key Responsibilities:

  • Deeply understand the Square’s infrastructure and systems.

  • Be a subject matter expert in relevant project/product and technology areas. Build and improve solutions in collaboration with engineering, product, and cross functional partners.

  • Lead design, development, and release of our first public API for identity modeling and verification.

  • Build a solid alert and monitoring system.

  • Drive consensus between half a dozen engineering teams on an architecture for modeling and sharing identity data between product areas.

  • Mentors other senior engineers or managers on strategy, collaboration, influence, execution, and other aspects of leadership.


You have:

  • 8+ years of hands on software engineering experience

  • Excellent software engineering knowledge and the ability to provide technical mentorship and guidance

  • Relevant engineering experience in lending, accounting, or similar domains

  • Experience collaborating with product managers, data analysts, and other engineering and cross-functional leaders 

  • Interest in working on a platform team building tools, APIs, and services for internal and external 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. Block 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

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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