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Staff iOS Software Engineer, Product Platform

Block· 10102 Engineering - Cash App
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Hybrid (Bay Area, CA)$263.6k - $395.4kfull-timePosted 1mo ago

About the role

Hands-on technical leader for iOS, building and evolving foundational iOS systems, libraries, and developer tools to support multiple teams across Cash App and Square. Focus on architecture, developer experience, performance, reliability, security, and AI-native development with organization-wide scope.

Responsibilities

  • Own and evolve foundational iOS systems, such as application architecture, navigation, deep linking, dependency management, lifecycle management, and shared user interface foundations.
  • Design shared libraries, frameworks, and developer tools that product teams rely on.
  • Find and frame systemic iOS problems that do not yet have clear ownership.
  • Define technical strategy, architecture, standards, and measures of success across teams and applications.
  • Build prototypes, reference implementations, and critical paths that prove a direction before broader adoption.
  • Lead multi-quarter migrations and foundational initiatives from proposal through adoption.
  • Establish durable practices for testing, observability, performance, release safety, security, and maintainability.
  • Improve developer and AI ergonomics so both engineers and coding agents can work effectively with the platform.
  • Contribute platform technology to open source when it creates value for the broader engineering community.
  • Integrate AI-assisted development tools into daily workflows to drive leverage across product and platform engineering.
  • Evaluate emerging tools and practices, building durable, AI-powered platform capabilities where they add clear value.
  • Verify AI-assisted outputs and ensure high standards for software quality, security, and reliability.
  • Operate beyond your immediate team to identify and address cross-cutting technical problems.
  • Lead architecture and design reviews across team boundaries.
  • Surface systemic risks before they become customer, seller, or engineering problems.
  • Develop senior engineers and create ownership models that distribute expertise.
  • Help set technical standards that improve the quality and velocity of iOS development over time.
  • Partner with engineers, product managers, designers, and engineering leaders to align platform investments with product needs.
  • Work with Android, web, and backend engineers to improve shared product foundations and cross-platform experiences.
  • Represent iOS platform needs in cross-team and company-wide technical discussions.
  • Communicate complex technical decisions clearly to technical and nontechnical audiences.

Qualifications

  • 12+ years of professional software engineering experience.
  • 8+ years in roles where mobile engineering was a primary responsibility, including 4+ years building native iOS products.
  • Deep expertise across modern and legacy iOS frameworks, Swift, and Objective-C.
  • Experience creating foundational systems, shared frameworks, or developer tooling used across multiple teams.
  • A record of leading strategic, multi-quarter initiatives with broad adoption and durable impact.
  • Experience connecting platform strategy to customer-facing and multi-tenant SaaS products that support business operations.
  • Strong systems thinking, technical communication, mentoring, and organizational influence.
  • A platform builder's mindset. You treat engineers as customers and measure success through adoption and product outcomes.

Skills

Required:iOS architecture and foundational systemsSwiftObjective-CUIKit
Nice to have:SwiftUI

Benefits

  • Remote work, medical insurance, flexible time off, retirement savings plans, and modern family planning are among offered benefits.
Last updated Sep 23, 2026. Interested? Apply on the company site.
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About Block

Block builds technology to increase access to the global economy.

Made up of Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, Block, Inc. builds technology to increase access to the global economy.

technologyfinancial servicesdigital paymentsmusic streaming
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