Senior iOS Platform Engineer

At Compass, our mission is to help everyone find their place in the world. Founded in 2012, we’re revolutionizing the real estate industry with our end-to-end platform that empowers residential real estate agents to deliver exceptional service to seller and buyer clients.

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.

• 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

• 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

• 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…