Staff Android Engineer, Checkout Flow

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

Square's purpose is economic empowerment. Since our beginning, we have been helping people start and manage their own businesses. The Checkout team at Square has a mission to help sellers make and close sales anywhere and anyhow buyers want to buy. We make this possible by building a shared client checkout platform for all of Square's checkout experiences.

We're looking for a resourceful and curious Staff Engineer for Square's Android Checkout team. The Android Checkout team and its partner iOS team together provide Sellers large and small around the world with a simple, seamless checkout experience that works both on and offline.

You Will

• Lead the architecture, design, and implementation of critical features within the Checkout Flow.


• Represent the team in architectural discussions and stakeholder conversations, serving as a bridge between our team and the broader organization.


• Shape the future of our codebase by building flexible, extendable, and reusable components.


• Foster a culture of engineering excellence and mentor engineers of all experience levels.


• Hold yourself and your teammates to the highest standard of engineering excellence, with unwavering attention to product reliability.


• Work with product managers, designers, and data scientists to shape the future of the Checkout Flow at Square.


• Contribute to a culture of positivity, psychological safety, and inclusivity within the team.

You Have

• 12+ years of Android software engineering experience, developing scalable production software and an excellent command of engineering fundamentals.


• Proficiency in native Android development using standard tools and frameworks, with strong expertise in Kotlin or Java.


• Experience working on complex technical projects that cross team boundaries


• Experience leading and mentoring software engineers to deliver solutions while fostering growth.


• A passion for building mobile products at all levels – from the low-level architectural decisions to the individual pixels.


• A desire to build products that our merchants depend on every day to run their business.

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 also consider qualified applicants with criminal histories for employment on our team, and always assess candidates on an individualized basis. We believe in being fair, and are committed to an inclusive interview experience, including providing reasonable accommodations throughout the recruitment process. If you require an accommodation, let your recruiter know. Want to learn more about what we're doing to build an inclusive workplace? Check out our Inclusion & Diversity page.