Senior Software Engineer (Backend), Point of Sale

  • 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

Our team is responsible for Squares Point of Sale app, the main entry point through which our merchants interact with us. We help service and develop features that affect how millions of merchants run their businesses, with an eye towards a great user experience and simple design.

As a Software Engineer, youll hit the ground running to help us:

  • Contribute to engineering design and implementation for full-stack features and systems

  • Monitor and improve system performance to ensure our systems can scale as our business grows

  • Improve and develop the teams technical best practices

  • Work with teams across Square to provide the most cohesive user experience in the industry


You have:

  • A strong desire to perform and grow as an Engineer

  • A Bachelors degree in Computer Science or equivalent industry experience

  • Interest in working full-stack, from optimizing database transactions to building distributed systems and front end web applications

  • Passion for building products that are beautiful outside and inside from their user experience to their robust and elegant design

  • Data and metrics-oriented mindset: you want your work to be measurable and impactful

  • Customer empathy! You understand your customers needs and requirements

  • 5+ years of professional experience

Technologies we use and teach:

  • Java, Ruby, Go, Javascript

  • Ember.js, CoffeeScript, Sass

  • Guice, Protocol Buffers, gRPC, Hibernate, jOOQ, Ruby on Rails

  • MySQL, Redis, Zookeeper

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.