Top Senior iOS Engineer Jobs in San Francisco, CA

Develop and ship high-quality iOS app features using Swift, UIKit, and SwiftUI. Collaborate with product managers, designers, and engineers; test and review code; diagnose bugs; improve scalable architecture; and document technical designs. The role also involves experimenting with new ideas, supporting product metrics, and contributing to a rapidly evolving engineering environment.

Develop and deliver native iOS features for MyFitnessPal’s Cal AI food-logging experience. Responsibilities include building interfaces in Swift, optimizing UI, storage, and network performance, implementing tests, researching technical solutions, collaborating with product and design teams, promoting engineering best practices, and mentoring junior developers.

Develop and lead frontend platform engineering for native and hybrid mobile applications. Build reusable, well-tested Android and iOS SDK components, contribute to architecture and system design, collaborate with product and engineering teams, own customer-facing deliverables, and identify product improvements while maintaining strong engineering standards.

Own and enhance the native iOS application by building polished, performant user interfaces, architecting scalable and maintainable code, writing unit and functional tests, resolving production issues, and improving existing systems. Collaborate closely with Design and Product teams to develop features, refine processes, and contribute to product decisions and technical improvements.

Own iOS technical direction for Everand and Scribd growth, retention, and monetization features. Build subscription, paywall, and in-app purchase flows using StoreKit; ship experiments; integrate APIs; improve stability and reduce technical debt. Collaborate with backend, web, and Android teams, lead technical initiatives, and mentor engineers while delivering scalable Swift applications.

Lead the architecture and development of Unity Ads’ iOS SDK. Design high-performance Swift components, ensure backward compatibility, collaborate with Android engineers, and own complex initiatives from design through rollout. Diagnose production issues involving lifecycle, concurrency, memory, networking, rendering, WebViews, and host-app integrations. Improve performance, reliability, crash rates, observability, and release safety while mentoring engineers and influencing technical direction.

Build and scale customer-facing iOS marketplace experiences using Swift and SwiftUI. Implement feature-flagged functionality, write unit and UI tests, collaborate with Product, Design, Android, backend, QA, and senior iOS engineers, and take increasing ownership of reliability and operational health. Use AI tools for coding, refactoring, testing, debugging, documentation, and reducing repetitive work while critically validating generated outputs.

Build and scale customer-facing iOS applications for OPENLANE’s wholesale vehicle marketplace. Responsibilities include designing Swift and SwiftUI features, leading iOS architecture and UIKit modernization, improving testing and release practices, managing cross-cutting concerns such as authentication and analytics, using AI development tools, mentoring engineers, and collaborating with Product, Android, backend, platform, and QA teams.

Drive projects that improve AI agent effectiveness across software development workflows. Build and maintain reliable developer tooling, iOS frameworks, libraries, build systems, and testing infrastructure. Collaborate with cross-functional partners to improve developer productivity, increase AI agent efficiency and reliability, and deliver roadmap initiatives across large-scale codebases.

Lead iOS platform initiatives that improve developer productivity and AI-agent effectiveness across software development workflows. Build and enhance frameworks, tooling, libraries, build systems, CI, and testing infrastructure for Airbnb’s large-scale Swift codebase. Collaborate cross-functionally to identify inefficiencies, drive roadmap projects, support migrations, and improve AI-agent execution time, token efficiency, reliability, and quality.

Lead the iOS engineering team and technical architecture for Aave App. Build secure blockchain functionality including wallets, private keys, transaction signing, RPC interactions, gas estimation, and onchain data flows. Establish standards for Swift and UIKit development, testing, observability, performance, release safety, and incident response. Remain hands-on with foundational architecture and security-sensitive features while mentoring engineers and partnering with product, design, backend, protocol, and security teams.

As an iOS Engineer on the Buyer Growth team, you will lead growth initiatives, develop features for our iOS app, and collaborate with various teams to improve user acquisition and retention.

Build and maintain consumer iOS and React Native experiences for health results, biomarker data, chat, and other member journeys. Own mobile architecture, native integrations, reusable components, performance, accessibility, testing, observability, reliability, and App Store releases. Collaborate with product, design, clinical, web, and backend teams on clear health experiences, shared data contracts, and cross-platform development patterns. This is an in-person San Francisco role with substantial ownership in a small startup team.

Develop and ship high-performance features for iOS, iPadOS, and macOS applications. Responsibilities include coding, testing, debugging, modernizing, documenting, reviewing code, mitigating technical risks, collaborating with product and engineering teams, and communicating progress to stakeholders. The role requires Swift and Apple platform experience, strong computer science fundamentals, problem-solving ability, and effective cross-functional collaboration.

Build and maintain automated test frameworks and suites for native iOS and Android applications. Integrate mobile automation into CI/CD pipelines, execute tests across simulators, emulators, and physical devices, investigate failures, improve testability and coverage, and contribute to automation architecture and testing standards. Collaborate with Mobile Engineering, QA, and Product teams while using AI-assisted tools to improve development, debugging, analysis, documentation, and workflow efficiency.

Design, build, and maintain high-quality iOS apps. Collaborate with PMs and designers, mentor engineers, and manage code ownership.

Build and improve scalable, accessible iOS experiences for Wikipedia. Lead technical discovery, system design, implementation, testing, observability, prioritization, and delivery of medium-complexity initiatives. Collaborate with product managers, designers, analysts, and engineers while managing scope, risks, tradeoffs, and documentation. The role requires strong Swift, SwiftUI, UIKit, iOS architecture, and performance optimization experience in an autonomous, remote, cross-functional environment.

Develop and maintain iOS applications, ensure performance, collaborate on features, mentor junior engineers, and implement CI/CD practices.

As a Lead iOS Engineer, you'll code, analyze systems, enhance an iOS SDK, mentor other developers, and ensure robust software practices.

Develop and maintain foundational iOS infrastructure, networking, architecture, UI frameworks, and shared components used by Lyft mobile engineers. Collaborate across engineering and design teams to define mobile architecture, improve developer productivity, reduce development friction, support iOS engineers, and contribute to open-source projects. The role emphasizes scalable, reliable Swift code, clean APIs, mentoring, documentation, and leading projects from concept through completion.

Own and enhance the native iOS application by building polished, performant features; architect scalable and maintainable code; write unit and functional tests; debug production issues; collaborate with Design and Product; contribute to product decisions; refactor code; and improve engineering processes. The role requires strong native iOS and Swift experience, with GraphQL, SwiftUI, and Combine preferred.

Develop business applications for iOS using Objective C and Swift. Requires 5 years of experience and a BSCS degree.

Looking for an Android and iOS Developer to work autonomously, making bug fixes and utilizing skills in RxJava and Dagger.

As a Staff iOS Engineer, you will lead mobile app architecture, collaborate with teams, improve development practices, mentor engineers, and stay updated with industry trends.

Lead technical strategy for iOS platform, build key infrastructure, ensure engineering excellence, and mentor senior engineers.