Staff iOS Engineer, Banking Mobile

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 focused on delivering high quality and seamless native mobile banking experiences. The team is responsible for the mobile product surface for all of Square's banking products, as well as 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.
You Will

• Bring high proficiency in iOS development, taking responsibility for the successful delivery of projects, including planning, risk management, development, testing, rollout, and maintenance.
• Hold yourself and your team to the highest standard of engineering excellence and prioritize quality over quantity.
• Design and implement features as part of Square's top banking initiative in support of a seamless banking experience.
• Lead the technical vision for iOS, client API interactions, and the future of our modern tech stack, shaping how our team builds and maintains scalable, high-quality mobile experiences.
• Build into our backend orchestration service.
• Collaborate closely with product managers, designers, and other mobile and backend engineers.
• Foster a culture of technical excellence, mentoring engineers, improving team processes, and driving architectural improvements.
• Influence Square's iOS community, contributing to shared frameworks, developer tooling, and engineering best practices.

You Have

• 12+ years of iOS software development experience.
• Motivation to build beautiful, intuitive products for the banking industry.
• Strong communication skills and a strong desire to deliver a great product.
• A deep sense of customer empathy and an interest in the team's product direction.
• [Beneficial] Experience with one or more banking products.
• [Beneficial] Experience with backend service development.

Technologies We Use and Teach

• Swift for our app and Kotlin for our backend service
• Square's open source iOS frameworks: Workflow (state management)
• UIKit, CoreAnimation, SQLite, Accessibility
• Unit tests, snapshot tests, integration tests
• Service APIs and Protocol Buffers
• Bazel for our build environments

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.