Senior Software Engineer (Frontend/Fullstack), Point of Sale Platform

  • Full-time

Company Description

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.

To solve this problem, we expanded into software and built integrated solutions to help sellers sell online, manage inventory, 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.

Job Description

The Square Point of Sale mobile applications are the main entry point through which merchants work with Square. Within Point of Sale (POS), we have the XPOS team that is focused on increasing both product and technical convergence across our POS apps. 

The XPOS Core team builds core features such as settings, navigation, and Sales Reports that our merchants work with many times a day. As a Full-stack Software Engineer on the team, you will report to the engineering lead and work with us on our dashboard product and building APIs to support features within our mobile applications.

To learn more about Point of Sale:

In this role, you will…

  • Leverage your expertise in front-end and back-end technologies to partner with and empower a full-stack group of engineers building solutions together that meet our merchants’ challenges;
  • Guide the architecture of our front-end systems to ensure quick and stable feature development;
  • Develop engineering designs and implementations of impactful end-user product features;
  • Help the team iterate on existing / establish new engineering patterns and processes to ensure an efficient development cycle;
  • Work with product managers and designers to define and refine product scope and design.


You have:

  • Excellent software engineering aptitude and a product mindset;
  • 8+ years professional experience working on web applications;
  • A desire to build beautiful, intuitive, and well-structured web applications, drawing on proficiency with HTML, CSS, and ES6;.
  • Experience working with front-end UI frameworks (Ember, React, Vue) and back-end systems in Java, Go, or Ruby;
  • A sense of customer empathy and an interest in influencing the product direction;
  • Interest in working with other engineering teams and cross functional partners;
  • Desire to foster an environment of learning and growth within your team

Technologies we use and teach:

  • Java / Guice / MySQL / Protocol Buffers / gRPC / JUnit
  • AWS - Terraform, S3, SNS, SQS, IAM
  • CDN - Fastly, CloudFront
  • ES6 JavaScript / TypeScript / EmberJS / React / SCSS / QUnit / Cypress

Additional Information

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 a proud equal opportunity employer. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, pregnancy, gender expression or identity, sexual orientation, citizenship, or any other legally protected class. 

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

Additionally, we consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis.


We want you to be well and thrive. Our global benefits package includes:

  • Healthcare coverage
  • Retirement Plans
  • Employee Stock Purchase Program
  • Wellness perks
  • Paid parental leave
  • Paid time off
  • Learning and Development resources

Block, Inc. (NYSE: SQ) is a global technology company with a focus on financial services. Made up of Square, Cash App, Spiral, TIDAL, and TBD, we build tools to help more people access the economy. Square helps sellers run and grow their businesses with its integrated ecosystem of commerce solutions, business software, and banking services. With Cash App, anyone can easily send, spend, or invest their money in stocks or Bitcoin. Spiral (formerly Square Crypto) builds and funds free, open-source Bitcoin projects. Artists use TIDAL to help them succeed as entrepreneurs and connect more deeply with fans. TBD is building an open developer platform to make it easier to access Bitcoin and other blockchain technologies without having to go through an institution.

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