Senior iOS Platform Engineer

About the Role

The Client Infrastructure team provides the foundational platform, tooling, and infrastructure that empowers our iOS engineering teams to build, deploy, and ship features with confidence, speed, and quality. As a Senior Software Engineer on the iOS Platform sub-team, you will be the technical leader shaping the future of iOS development at Compass, fostering a culture of technical excellence and developer empowerment across 40+ iOS engineers.

You are a pragmatic visionary who can "poke holes" in complex iOS architectures to prevent future technical debt, simplify sprawling build systems, and deliver scalable, resilient platform solutions that save thousands of engineering hours. Beyond execution, you serve as the iOS technical leader and mentor, guiding talented iOS engineers while driving impactful, high-complexity platform projects. You lead by example - innovating, teaching, and shaping the future of iOS engineering at Compass.

This role requires deep iOS platform expertise combined with strategic thinking about how to force-multiply an entire iOS organization through excellent platform infrastructure.
Responsibilities

• Drive the technical roadmap for iOS platform infrastructure, championing best-in-class developer experience and modern iOS development practices across 40+ iOS engineers
• Architect, scale, and maintain iOS platform core capabilities including build systems , test infrastructure, API frameworks, and shared libraries to meet the quality and performance needs of all iOS product teams
• Own iOS testing strategy and infrastructure that empowers teams  to maintain strong testing standards through intelligent automation, AI-enhanced testing tools, and quality gates that enforce best practices
• Lead iOS platform modernization initiatives including Swift 6 migration strategy, adoption of Kotlin Multi Platform, and technical debt reduction while championing coding standards and architectural patterns
• Optimize iOS build system infrastructure (Bazel) serving 40+ engineers through build time reduction, caching strategies, and developer productivity tools that guide engineers along the "golden path"
• Establish and refine standards for iOS app performance, reliability, and monitoring (crash-free rates, launch times, runtime performance) while partnering with observability teams on iOS-specific infrastructure
• Design and maintain high-quality internal iOS tools, CLIs, and APIs that improve developer productivity and operational efficiency through automation and intelligent tooling
• Mentor iOS engineers on platform engineering best practices, collaborate with Android and Web platform teams on cross-platform opportunities, and partner with stakeholders to proactively identify platform needs

Basic Qualifications

• BS in Computer Science, Software Engineering, or equivalent professional experience
• 7+ years of professional iOS software development experience with significant focus on platform engineering, infrastructure, or tooling
• Expert-level Swift proficiency and deep understanding of iOS SDK, frameworks, and platform evolution
• Proven ability to design and build complex iOS platform systems that serve multiple teams and scale across an organization
• Deep expertise in iOS testing frameworks and automation (XCTest, UI Testing, snapshot testing, test orchestration)
• Strong experience with iOS build systems - Bazel strongly preferred; deep understanding of build optimization, dependency management, and modularization
• Demonstrated ability to influence technical decision-making and lead complex, multi-quarter platform initiatives
• Track record of modernizing legacy iOS systems and successfully deprecating redundant infrastructure

Preferred Qualifications

• Experience owning iOS platform infrastructure at scale (build systems, test frameworks, CI/CD pipelines, shared libraries) serving multiple teams
• Experience with using cross platform development frameworks such as Kotlin Multi-Platform, React Native, and/or Flutter in a scaled environment
• Deep knowledge of Bazel for iOS development, including BUILD file architecture, caching strategies, and remote execution
• Expertise with modern iOS architecture patterns (SwiftUI, Combine, async/await, Swift Concurrency) and performance optimization tools (Instruments, Xcode diagnostics)
• Ability to manage internal iOS platform as a product, treating iOS engineers as customers and building tools/frameworks successfully adopted by multiple teams
• Track record of driving outsized impact on engineering culture, developer experience, and organizational velocity through platform thinking

Why Join Client Infrastructure at Compass 

• High-impact role: Your work directly enables 40+ iOS engineers and shapes iOS development for the entire company
• Technical leadership: Be THE iOS platform technical leader, driving strategy and architecture
• Innovation opportunity: Lead cutting-edge initiatives like AI-powered testing, Swift 6 migration, and adoption of Kotlin Multi Platform
• Collaborative environment: Work with talented iOS, Android, and Web engineers on cross-platform platform challenges, including integrating Kotlin Multiplatform (KMP) for shared modules

Modern tech stack: Work with latest iOS technologies, modern build systems, and AI-enhanced development tools

Compensation: The base pay range for this position is $131,000-$197,000; however, base pay offered may vary depending on job-related knowledge, skills, and experience. Bonuses and restricted stock units may be provided as part of the compensation package, in addition to a full range of benefits. Base pay is based on market location. Minimum wage for the position will always be met.