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Staff Android Engineer, Accessibility & UI Systems

Cash App

$263,600 - $395,400
Aug 22, 2025
New York, NY, US
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Square's UI Systems team is looking to solve the challenge of maintaining a consistent and delightful user experience across all of Square's seller-facing products on iOS, Android, and web. This involves building and maintaining a universal design system called Market, along with core UI frameworks and tools that enable faster, easier, and more accessible UI development at scale for nearly 200 Android engineers and over 1500 screens.

Requirements

  • 5+ years experience working with Android's accessibility technologies, as well as general knowledge of mobile accessibility expectations and the WCAG set of standards.
  • 12+ years Android development experience.
  • Jetpack Compose experience or knowledge is expected.
  • Experience with, understanding of, and passion for UI design principles.
  • Experience building design systems or UI frameworks at medium to large scale.
  • Experience building relationships across design and engineering.
  • Experience leading through influence across engineers.

Responsibilities

  • Build the core UI frameworks and design tooling needed to deploy, maintain, and test our design system at scale.
  • Work closely with designers on UI systems, and across Square, to build a scalable and accessible design system for our mobile apps.
  • Work with all engineers on UI systems across Android, iOS, and web to ensure we're building in a consistent and cohesive way on all three platforms.
  • Embed with Square's product teams to evangelize and adopt our design system, core frameworks, accessibility, and design tools.
  • Provide courteous, timely support to product engineers building with the design system, answering their questions, and building missing pieces to unblock and support their needs.
  • Partner closely with our design team to inform and deliver components and tools that help Square's product engineers work faster, while ensuring a quality experience for Square's sellers.
  • Work closely with peer engineering teams like Mobile Foundation, ensuring a reliable, performant, observable, and accessible toolkit across all layers of the stack.

Other

  • Experience as a technical lead / DRI for a small to medium sized team.
  • Note: We are a process-light team – you must be independent, have a strong bias towards action, and be a self-starter. We use processes to help us, not to constrain us.
  • As a staff engineer on UI Systems Android, you'll work closely with UI Systems leads, and leads (both technical and people) across Square to set technical direction, set team priorities, and overall evangelize the work of UI Systems and our Accessibility squad.
  • You will also be expected to build and maintain relationships with other senior mobile engineers, both within our team, and across all of our customer and peer teams to stay ahead of potential issues and understand upcoming needs.
  • A key part of UI Systems' job is to understand the current state of mobile development at Square, empathizing with the pain points of our customer teams, and working across platform teams to solve these issues – our team works with others to "get to yes" – we want to be an enabler, not a blocker.
  • We're working to build a more inclusive economy where our customers have equal access to opportunity, and we strive to live by these same values in building our workplace.
  • Block is an equal opportunity employer evaluating all employees and job applicants without regard to identity or any legally protected class.
  • We will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.
  • We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations to disabled applicants throughout the recruitment process.
  • We encourage applicants to share any needed accommodations with their recruiter, who will treat these requests as confidentially as possible.
  • Want to learn more about what we're doing to build a workplace that is fair and square? Check out our I+D page.
  • While there is no specific deadline to apply for this role, U.S. roles are typically open for an average of 55 days before being filled by a successful candidate.
  • Please refer to the date listed at the top of this job page for when this role was first posted.
  • Block takes a market-based approach to pay, and pay may vary depending on your location.
  • U.S. locations are categorized into one of four zones based on a cost of labor index for that geographic area.
  • The successful candidate’s starting pay will be determined based on job-related skills, experience, qualifications, work location, and market conditions.
  • These ranges may be modified in the future.
  • To find a location’s zone designation, please refer to this resource.
  • If a location of interest is not listed, please speak with a recruiter for additional information.
  • Every benefit we offer is designed with one goal: empowering you to do the best work of your career while building the life you want.
  • Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are just some of our offering.
  • Check out our other benefits at Block.