Staff Frontend Software Engineer, Square Platform Web

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn't work together.
So we expanded into software and started building integrated, omnichannel solutions - to help sellers sell online, manage inventory, offer buy now, pay later functionality, book appointments, engage loyal buyers, and hire and pay staff. Across it all, we've embedded financial services tools at the point of sale, so merchants can access a business loan and manage their cash flow in one place. Afterpay furthers our goal to provide omnichannel tools that unlock meaningful value and growth, enabling sellers to capture the next generation shopper, increase order sizes, and compete at a larger scale.
Today, we are a partner to sellers of all sizes - large, enterprise-scale businesses with complex operations, sellers just starting, as well as merchants who began selling with Square and have grown larger over time. As our sellers grow, so do our solutions. There is a massive opportunity in front of us. We're building a significant, meaningful, and lasting business, and we are helping sellers worldwide do the same.
The Role
We're looking for a product-focused Staff Software Engineer with deep frontend expertise to join our Square Platform Web team. In this role, you'll contribute to two critical platform areas that power experiences across the Square ecosystem, helping sellers and developers thrive.
The Teams You'll Support:

• Identity Platform - This team empowers sellers to onboard into Square's financial ecosystem. From verifying identities to ensuring secure account access with features like passkeys, we build the flows that help sellers get started and stay secure.
• Developer Platform - We help third-party developers build meaningful tools and businesses on Square. You'll help create developer-facing products like our API Explorer, App Marketplace, and documentation that makes integration seamless.

You Will:

• Lead the evolution of Square's web architecture for both Identity and Developer experiences
• Collaborate cross-functionally with engineers, product managers, and designers to shape solutions that align with Square's mission and product strategy
• Mentor engineers across the org, setting the bar for frontend best practices, performance, and accessibility
• Contribute to and influence Square's broader Web Engineering community, driving shared standards and innovation
• Champion an inclusive, psychologically safe environment where diverse perspectives are welcomed and empowered

You Have

• 12+ years of industry experience, typically supported by a Bachelor's degree in Computer Science or equivalent hands-on expertise.
• A track record of driving cross-functional collaboration and delivering meaningful impact at scale
• Deep expertise in JavaScript, TypeScript, and React, with a strong understanding of modern frontend architecture
• Experience creating detailed technical documentation and a collaborative approach to working with Design, Product, and Engineering peers
• A product mindset and strong customer empathy - you care about the "why" behind the work and want to shape impactful user experiences
• A passion for building reliable, and thoughtful frontend systems, with a curious mind that's always seeking to improve

Technologies We Use and Teach

• JavaScript, Typescript
• React, Ember, Storybook
• MySQL, NoSQL, Redis, Kafka
• Protocol Buffers, Terraform, Kubernetes, Envoy

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 .
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.