Senior iOS Engineer, Onboarding and Checkout 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 Onboarding and Checkout Mobile team serves new and existing users of the Square Point of Sale (SPOS) engine. Our mission is to enhance the user experience during onboarding and streamline the cart-building flows to ensure a seamless and powerful experience for our merchants.
As a Senior iOS Engineer on the Onboarding and Checkout Mobile team, you will support the team's work in converging key checkout applets across multiple engines. You'll work closely 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 play a pivotal role in enhancing the performance and reliability of our iOS solutions, directly impacting millions of users worldwide.
You Will

• Architect and improve the iOS codebase to support onboarding workflows and 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.
• Continue to improve the onboarding experience within SuperPOS, while also building solutions for upgrading existing sellers to a better engine from their current one when relevant.
• Identify and drive improvements in our iOS development processes and tools, contributing to the technical roadmap of the team.

You Have

• 6+ 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 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 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 will consider qualified applicants with arrest or conviction records for employment in accordance with state and local laws and "fair chance" ordinances.
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:
$198,000 - $297,000 USD
Zone B:
$188,100 - $282,100 USD
Zone C:
$178,200 - $267,400 USD
Zone D:
$168,300 - $252,500 USD
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.