Senior Software Engineer, API Frameworks

  • San Francisco, CA
  • Full-time

Company Description

We believe the economy is better when everyone has access. When everyone has room to grow. No one should be left out because the cost is too great or the technology too complex. We started with a little white credit card reader but haven’t stopped there. We’re empowering the independent electrician to send invoices, setting up the favorite food truck with a delivery option, helping the ice cream shop pay its employees, and giving the burgeoning coffee chain capital for a second, third, and fourth location. We’re here to help sellers of all sizes start, run, and grow their business—and helping them grow their business is good business for everyone.

Job Description

The API Frameworks team helps make all endpoints at Square part of a cohesive public API. We partner with internal product engineering at Square to provide great infrastructure, tooling and best practices which allows them to build great APIs for our external developers. These developers rely on our APIs to build apps for our sellers to power their businesses.

We are looking for an experienced backend engineer to build remarkable solutions to reduce the time it takes for a team to ship a public API.

You will:

  • Design and review code and architectural proposals

  • Build server-side frameworks, infrastructure, and tooling that will be utilized by many teams across the company

  • Collaborate with teams to design and ship APIs

  • Teach and learn from a team of talented developers


You have:

  • 5+ years of experience designing and implementing APIs, and operating complex systems

  • Excellent interpersonal skills that enable effective communication and collaboration with a variety of stakeholders

Technologies we currently use:

  • Java

  • Go

  • Ruby

  • Protocol Buffers

  • Swagger 2.0

  • OpenAPI 3.0

  • Envoy

  • MySQL

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