Senior Staff iOS Engineer, Checkout Applet 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 Checkout Applet Mobile team serves new and existing users of the Square Point of Sale (SPOS) engine. Our mission is to streamline the cart-building flows to ensure a seamless and powerful experience for our merchants. The team owns the Checkout applet, which is the most frequently used and critical surface area in our POS apps, allowing sellers to create orders and start the payment flow for them.
As a Staff iOS Engineer on the Checkout Applet Mobile team, you will support the team's work in converging key checkout applets across multiple engines. You'll work with cross-functional teams to ensure our applications are scalable, maintainable, and capable of meeting the diverse needs of our merchants. Additionally, you will continue to improve the onboarding experience within SuperPOS while also building solutions for upgrading existing sellers to better engines when relevant. You'll xfhelp enhance the performance and reliability of our iOS solutions, directly impacting millions of users worldwide.
You Will

• Architect and improve the iOS codebase to support diverse checkout needs within a single POS engine.
• Collaborate with product managers, designers, and engineers across teams to deliver high-quality, scalable features.
• Lead efforts to converge the checkout applet across different engines, streamlining technical and product solutions.
• Champion best practices in iOS development, ensuring code quality, performance, and maintainability.
• Provide technical mentorship and guidance to engineers, fostering a culture of learning and innovation.
• Identify and drive improvements in our iOS development processes and tools, contributing to the technical roadmap of the team.

You Have

• 12+ years of iOS development experience with deep expertise in Swift and Objective-C.
• Proven experience in architecting and leading complex iOS projects at scale.
• Strong collaboration skills, with experience working across teams and functions to deliver cohesive, user-focused solutions.
• Experience mentoring engineers and leading by influence.

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. Canada locations are categorized into one of two 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.
Zone A:
$222,900 - $334,300 CAD
Zone B:
$222,900 - $334,300 CAD
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.