Senior Android Engineer, Square Banking

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
The Banking Mobile team is a mobile development team focused on delivering high quality and seamless banking experiences. The team is responsible for both the mobile product surface for all of Square's banking products, and also a backend service that orchestrates service APIs to power our banking products. You will design, develop, and maintain functionality for Square's entire Banking product ecosystem. You will collaborate with other mobile and backend engineers plus our product and design teams to ensure that millions of merchants have a remarkable and reliable experience banking with Square. Mobile is a high priority for the Square Banking organization.
You Will

• Lead the architecture, design, and implementation of critical features within our Banking product suite.
• Represent the team in architectural discussions and stakeholder conversations, serving as a bridge between our team and the broader organization.
• Help 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 Banking at Square.
• Help contribute to a culture of positivity, psychological safety, and inclusivity within the team.
• Mentor other engineers on Android best practices and architectural patterns
• Contribute to the technical direction of our Android codebase
• Use AI tools to accelerate the impact of yourself and your team.

You Have

• Relevant Bachelor's degree (or equivalent practical experience) plus 8+ years experience in Android software development.
• Strong technical problem-solving skills with a proven track record of debugging and resolving complex technical issues
• Experience building and shipping substantial features in production Android applications
• Deep understanding of Android architecture patterns, lifecycle management, and performance optimization
• Track record of mentoring other engineers and providing technical leadership within a team
• Understanding of payment systems and point of sale workflows is valuable but not required
• (optionally) Backend service engineering experience

Technologies We Use and Teach

• Kotlin for mobile and backend development, leveraging Square's modern open source library, Workflow
• Espresso and Snapshot for testing
• Vendor SDKs, Service APIs, and Protocol Buffers
• Gradle for our build environment
• AI tools including Goose and Cursor
• We also use LeakCanary, RXJava, Dagger, Mortar, and Okhttp among others

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:
$217,800 - $326,800 USD
Zone B:
$207,000 - $310,400 USD
Zone C:
$196,100 - $294,100 USD
Zone D:
$185,200 - $277,800 USD
Use of AI in Our Hiring Process
We may use automated AI tools to evaluate job applications for efficiency and consistency. These tools comply with local regulations, including bias audits, and we handle all personal data in accordance with state and local privacy laws.
Contact us at [email protected] with hiring practice or data usage questions.
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.