Staff iOS Platform Engineer - AI-Powered Foundations

Block; San Francisco (CA); On-site; USD 264,000 - 395,000; Full time

Benefits offered by this job

Remote work

Medical insurance

Flexible time off

Retirement savings plans

Family planning support

Job summary

Block is seeking a Staff iOS Software Engineer for the Product Platform, focusing on foundations behind Cash App and Square. This is an individual contributor role with organization‑level scope, offering remote Bay Area work and the chance to influence iOS architecture and developer experience.

You will lead foundational initiatives, design shared libraries and tools, and mentor engineers while advancing AI‑native development and cross‑team collaboration across multiple platforms.

Qualifications

• 12+ years of professional software engineering experience.
• 8+ years in mobile engineering with 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.

Responsibilities

• Own and evolve foundational iOS systems and architecture.
• Design shared libraries, frameworks, and developer tools.
• Frame systemic iOS problems and define technical strategy.
• Lead multi‑quarter migrations from proposal to adoption.
• Establish testing, observability, performance, release safety, and security practices.
• Improve developer and AI ergonomics for platform usage.
• Contribute platform tech to open source when beneficial.

Skills

Leadership

Mentoring

Systems thinking

Technical communication

Platform mindset

Tools

Swift

Objective-C

SwiftUI

UIKit

Swift Concurrency

Combine

Xcode

Instruments

Bazel

Protocol Buffers

Job description

Block is seeking a Staff iOS Software Engineer for the Product Platform, focusing on foundations behind Cash App and Square. This is an individual contributor role with organization‑level scope, offering remote Bay Area work and the chance to influence iOS architecture and developer experience.

You will lead foundational initiatives, design shared libraries and tools, and mentor engineers while advancing AI‑native development and cross‑team collaboration across multiple platforms.