Senior Android Engineer, App Platform

  • Toronto, ON, Canada
  • Full-time

Company Description

When we launched the little white reader, we invented mobile, ubiquitous payments and enabled anyone to start, run, and grow a business. Ten years and billions of transactions later we’re reimagining commerce for businesses of all types and sizes—we’re enabling the independent electrician to send invoices, helping the beauty salon pay its employees, and giving the burgeoning coffee chain capital for a second, third, and fourth location. 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

Square’s mobile applications continue to rapidly scale and diversify as each new opportunity is tackled by teams of passionate engineers. App Platform endeavors to amplify the efficiency of developing, building, testing, and releasing high quality mobile apps.

Within App Platform, opportunities exist on teams tackling specific aspects of our overall mission. Foundation focuses on overall architecture, frameworks, and primitives used as the building blocks for all product development at Square. Isolated Development focuses on keeping our code well abstracted and optimized for rapid development by individual teams. Mobile Performance and Services focuses on building services and frameworks for connecting mobile applications to Square’s backend services.

Are you interested in helping us grow in Toronto? You will collaborate with our existing team members in Atlanta, San Francisco, and Toronto while growing Square’s engineering presence in the city.


You will:

  • Foster a strong culture with team members distributed across Square’s offices.

  • Collaborate with colleagues across engineering, product, design and operations to deliver end-to-end solutions.

  • Design high availability, resilient systems which can operate no matter the network or device conditions.

  • Capture and analyze metrics to drive informed decisions.

  • Contribute to the direction of the team and selection of projects on our roadmap.

You have:

  • At least 5 years of relevant industry experience developing Android applications in Java or Kotlin.

  • Excellent software engineering aptitude and the ability to provide technical mentorship and guidance.

  • An eagerness to share your ideas, and openness to those of others.

  • BA/BS degree or equivalent working experience.

Technologies we use and teach:

  • Java and Kotlin for mobile development.

  • Workflow, Dagger, RxJava, Mortar, Flow, Retrofit, and OkHttp mobile libraries.

  • JSON and Protocol Buffers for network transport.

  • Bazel for many of our build environments.

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