Senior Software Engineer, Payment Platform

  • Seattle, WA
  • 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

As a software engineer on the Payments team, you will be responsible for designing, building, and maintaining the Payments Platform services and infrastructure that move money for Square. You will be deeply involved in the technical details of building highly available and reliable services, while also working with product teams to enable Square to rapidly build new capabilities for our merchants and buyers all over the world.

You will:

  • Build our Payments Platform, used by the rest of the organization and a key strategic asset of Square
  • Design and implement high-volume, low-latency, distributed transaction processing systems, making thoughtful tradeoffs between consistency and availability when both are not possible
  • Abstract away the legacy APIs of the financial world into consistent, coherent service APIs for Square’s products to build upon
  • Build systems that manage customers’ sensitive data and hold Square to the highest standards for security and compliance
  • Work cross-functionally with our product, business, and finance teams to develop Square’s global payments strategy
  • See the big picture to design fault tolerant systems so the team can be brave, move fast, and break things, without ever showing a negative impact to customers

Qualifications

You have:

  • Innate curiosity and a desire to be responsible for all aspects of reliably moving billions of dollars in a small, highly focused team
  • Understanding and curiosity in creating highly available, scalable, low-latency, global systems
  • Track record of pursuing self directed side projects, research, or open source projects
  • Interest in changing the payments landscape in the US and globally
  • Bachelor's degree and 8+ years of software development experience in Java, Go or similar

Technologies we use:

  • Java
  • Guice, Guava, Protocol Buffers, jOOQ, MySQL, Redis

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)squareup.com. 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.