Senior Software Engineer, Customer Data Applications Team

  • San Francisco, CA
  • 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

If you think about the story of Square, it's largely a story of a payments company that spawned an ecosystem of products related to commerce: Payroll, Capital, Appointments, Employee Management, Loyalty, Gift Cards and many more.  People come to Square for payments, but they stay for the integrated ecosystem.

The Customer Data Applications team is at the center of all this and is one of the two teams working on a data integration platform that connects this ecosystem of products to our payments customers. We started our journey by powering marketing use cases and built a customer data platform instead of simply integrating with 3rd party marketing tools.  Now that the system is up and running, we're starting to build and integrate a new ecosystem of products powered by data, including personalization and ML, analytics, segmentation, data governance, and warehousing just to name a few.

Furthermore, the team is unique in that we build most of our services on the Google Cloud platform therefore there are opportunities to become an expert in cloud tooling which is a valuable set of skills to have as the world moves towards the cloud.

As a member of our team, you will:

  • Work with product and design to build first party applications on the platform to enable a variety of use cases such as personalization, self-servability, etc.
  • Help us architect the core Square wide data models that unify data from a number of distributed services.
  • Design and build APIs and highly available services that deliver personalized, real-time content.
  • Work with all product teams across Square to enable or build data integrations and client logging libraries.
  • Work closely with our data science and analytics teams to build event-based triggers for intelligent decisioning.
  • Build data pipelines and integrations that connect Squares services to cloud services and 3rd party tools.
  • Work with the Marketing Operations team to either build or integrate tools to make marketing more automated and effective.


You have:

  • Demonstrated excellence in Python, Java or Ruby
  • 7+ years industry experience
  • A desire to be directly responsible for the lifecycle of engineering solutions.  This includes leading the design and implementation of projects and organizing the team to achieve a remarkable solution.
  • Experience designing and building APIs
  • A love of data, data munging and care about building the right abstractions
  • A strong desire to see your work have direct impact on the business

Preferred Qualifications:

  • Experience with Google Cloud Platform
  • Expertise with streaming technologies (Kafka, Pubsub, Kinesis) and log-based architectures and experience writing batch and stream processing jobs (i.e. Apache Beam, Google Cloud DataFlow, Apache Spark, Apache Storm)
  • Experience with ad tech, targeting, machine learning
  • Familiarity with marketing systems
  • [bonus] Front-end skills (javascript, react, design)

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
  • Paid time off
  • Learning and Development resources