iOS Engineer III, App Platforms

We are seeking an experienced L3 iOS Engineer who is passionate about "how things work under the hood." Unlike a typical product role focused on customer-facing features, this role lives at the boundary of Mobile Engineering.

You will spend the majority of your time architecting and evolving shared codebases-from Design Systems to Networking layers-while also providing critical support for the CI/CD tooling (Xcode/Buildkite/GitHub) that delivers our apps. As an L3, you are expected to not only maintain existing systems but to lead the architectural evolution of our platform.

What You'll Do

Core Frameworks & Architecture (Primary Focus ~70%)

• Architect & Evolve Libraries: Lead the development and modernization of critical frameworks used by all feature teams, including our Networking Framework (Apollo/GraphQL), Logging/Performance, and Feature Toggle systems.
• Design System Engineering: Champion UI consistency and performance by leading the adoption and architecture of SwiftUI and maintaining our library of reusable components and native transitions.
• Testing Strategy: Contribute to app stability by enhancing our Testing Frameworks, specifically architecting tooling for Unit, UI (XCTest), and Snapshot testing execution at scale.
• Privacy & Compliance: Lead the technical implementation of evolving privacy standards, including Apple's Privacy Manifests, App Tracking Transparency (ATT), and GDPR tracking policies.
• Dependency Management: Strategic oversight of our codebase health through managed dependency updates (Renovate/Swift Package Manager) and vetting new SDK integrations.

Infrastructure & Developer Experience (Secondary Focus ~30%)

• CI/CD & Build Support: Assist in maintaining our build system (Buildkite) and automation (Fastlane). You will help monitor and manage our Merge Trains/GitHub Merge Queues to ensure code merges remain unblocked and efficient for a large engineering org.
• Tooling Automation: Identify and implement opportunities to automate manual workflows using local tooling (Swift scripts, Ruby, or Python) to increase developer productivity.
• Release Operations: Collaborate with the team on release reporting and troubleshooting issues within the CI/CD pipeline to maintain our weekly release cadence .
• Mentorship & Best Practices: Conduct high-impact code reviews and provide technical guidance to L1/L2 engineers. Ensure documentation for frameworks and platform tools is comprehensive and enables self-service.

• Experience: 5+ years of professional iOS software development experience.
• High-Velocity Background: Proven experience working on large-scale mobile applications that ship on a weekly (or faster) release cadence .
• Technical Mastery: Fluency in Swift , with a deep understanding of UIKit, SwiftUI, and iOS SDK internals. Deep familiarity with architectural patterns (MVVM, Clean, MVI).
• Efficiency Mindset: Experience leveraging AI-driven development tools (e.g., Cursor , Junie.ai ) to accelerate coding workflows, refactoring, and documentation.
• Platform Curiosity: A deep interest in the build process, not just the UI. You are curious about Xcode build settings, compiler flags, and modularization strategies.
• Tooling Familiarity: Experience with CI/CD systems (e.g., Buildkite, CircleCI, Jenkins) and scripting languages (Bash, Ruby, or Python).

Nice to Have

• Experience with GraphQL (Apollo) .
• Deep experience with SwiftUI architecture in a hybrid UIKit environment.
• Experience configuring and optimizing GitHub Merge Queues for large teams.
• Experience leveraging observability tools (Datadog, Splunk) to monitor platform health and operational excellence.
• Experience with Fastlane or writing custom Ruby gems for automation.

The App Platforms team plays a pivotal role in the seamless functioning of Wayfair's suite of 10+ native iOS and Android apps. We act as a force multiplier for the rest of the mobile organization. While we own the "paved road" infrastructure that ensures efficient builds and releases on a high-velocity weekly cadence , our primary mission is providing the core libraries, frameworks, and architecture that feature teams rely on to build delightful user experiences., Wayfair is one of the world's largest online destinations for the home. Whether you work in our global headquarters in Boston, or in our warehouses or offices throughout the world, we're reinventing the way people shop for their homes. Through our commitment to industry-leading technology and creative problem-solving, we are confident that Wayfair will be home to the most rewarding work of your career. If you're looking for rapid growth, constant learning, and dynamic challenges, then you'll find that amazing career opportunities are knocking.