Staff Frontend Software Engineer, Web UI

Block is one company built from many blocks, all united by the same purpose of economic empowerment. The blocks that form our foundational teams - People, Finance, Counsel, Hardware, Information Security, Platform Infrastructure Engineering, and more - provide support and guidance at the corporate level. They work across business groups and around the globe, spanning time zones and disciplines to develop inclusive People policies, forecast finances, give legal counsel, safeguard systems, nurture new initiatives, and more. Every challenge creates possibilities, and we need different perspectives to see them all. Bring yours to Block.
The Role
Come Join Square Web's UI team - a tight-knit crew of design-passionate engineers who are building accessible components for our Square's web developers. On a high level, the core objective for the team is building out a new component library that specifically fits the needs of Square's Dashboard. We've got a solid existing component library, but need to grow it to meet the expanding needs of our developers. This is a transformational time to join our team as a Staff Software Engineer, especially if you're excited about shaping how the 200+ web engineers build tools to support our small business customers
Work from anywhere: This role can be performed from any location in US or Canada.
You Will

• Be a key player in Square's Market design system - our React component library that powers experiences used by millions of Square sellers
• Help architect and build out a second-level component library based on Market, giving our product teams the building blocks they need to move fast while staying consistent
• Work closely with the UI Systems team across Square and Block to ensure our components are not just beautiful, but accessible to everyone - we take a11y seriously around here
• Share ownership in Square's Dashboard web application - a surface used by millions of Square sellers to manage their businesses - ensuring we are proud to sign our names to the experiences we enable there
• Work with other senior front-end engineers to establish and evangelize best practices and patterns with React
• Explore and implement emerging technologies, including AI-assisted development tools, to enhance our component development workflow
• Prioritize and advocate for tooling and build investments that will add leverage for every front-end engineer
• Actively participate in reviewing engineering design documents to advocate for the right technical architectural tradeoffs
• Coach and mentor engineers across the organization, evolving and instilling a culture of high quality and high velocity work

You Have

• 12+ years of experience with JavaScript/TypeScript and modern web frameworks
• Deep, hands-on experience with React - the kind of knowledge that comes from building and maintaining large-scale React applications
• Significant experience working with component libraries and design systems - bonus points if you've helped build one from the ground up
• A strong commitment to web accessibility (A11y) and experience implementing WCAG guidelines in real-world applications
• Extensive experience in web markup (HTML5, CSS3), backend technologies (NodeJS, Java), front-end build tools (Webpack, ESbuild, Vite) as well as micro front-end architecture
• Proven record of successfully delivering large projects (> 1 year) and large teams from start to finish with strong collaboration, communication, and ownership
• Hands on experience setting up and maintaining ReactJS applications with a substantial contributor base (dozens of active weekly contributors)
• A track record of active contributions to front-end open source projects
• Curiosity about emerging technologies and their practical applications in developer tooling

Technologies We Use and Teach

• JavaScript, TypeScript, Vue.js, Ember, React and other modern web frameworks
• PHP (with Laravel), Ruby, and Go
• AWS, MySQL, PostgreSQL, Redis, Elasticsearch, and Memcached

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.
Zone A:
$263,600 - $395,400 USD
Zone B:
$263,600 - $395,400 USD
Zone C:
$263,600 - $395,400 USD
Zone D:
$263,600 - $395,400 USD
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.
Block, Inc. (NYSE: XYZ) builds technology to increase access to the global economy. Each of our brands unlocks different aspects of the economy for more people. Square makes commerce and financial services accessible to sellers. Cash App is the easy way to spend, send, and store money. Afterpay is transforming the way customers manage their spending over time. TIDAL is a music platform that empowers artists to thrive as entrepreneurs. Bitkey is a simple self-custody wallet built for bitcoin. Proto is a suite of bitcoin mining products and services. Together, we're helping build a financial system that is open to everyone.