Senior Software Engineer, Customers Engineering (Data/ML)

  • 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 Customer Engagement team’s mission is to help merchants grow their business by giving them the tools to know, support, engage, and acquire their customers. Our product suite includes CRM, omni-channel marketing (e.g. email, social, advertising), feedback and messaging, loyalty and rewards. We’re looking for data-minded engineers to help build the next generation of our Customer Data Platform which is used by Square and third party developers to build their customer-focused products.

You Will:

  • Design and build new features that enable merchants to better understand and serve their customers
  • Deliver APIs that make it easy for developers to interact with customer data
  • Design access management systems that enable developers to confidently + securely integrate their critical customer data with Square’s point of sale platform
  • Build systems that analyze and improve customer data quality for Square’s sellers
  • Improve the personalization capabilities that power Square Marketing in order help Square’s sellers attract the best customers for their business
  • Devise solutions to performance and scalability challenges as our customer data set continues to grow
  • Build for the future by clearly communicating the cost-benefit of a given solution and advocating for the best path forward
  • Visit merchants to see the product(s) in action
  • Embrace opportunities to stretch yourself by learning new technologies


You have:

  • 7+ years of software development experience on a Data, Machine Learning, or Platform team 
  • An advanced degree in a quantitative field (stats, physics, computer science) or equivalent experience
  • Experience in designing and productionizing large-scale distributed systems built around big data.
  • Excellent skills with all things data: modeling, access management, quality, data pipelines, insights
  • A passion for leveraging your critical thinking, problem solving and analytical skills to deliver remarkable solutions to your customers
  • The ability to thrive in a collaborative environment involving different stakeholders and subject matter experts
  • Experience with cloud computing platforms, such as AWS, Google Cloud or Azure

Even Better:

  • Knowledge of or experience applying machine learning models 

Technologies we use and teach:

  • Go, Java
  • MySQL, BigQuery, Elasticsearch
  • Google Cloud, AWS
  • Dataflow, TensorFlow

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