Top Senior iOS Engineer Jobs in NYC, NY

Develops secure, scalable native iOS applications for business banking. Responsibilities include Swift development, architecture and design, unit and UI testing, CI/CD, troubleshooting, modularization, dependency injection, reusable SDK development, and use of AI-assisted coding tools. The role also analyzes application data, improves coding hygiene and system architecture, and collaborates within an agile engineering team.

Build and improve the X iOS app, delivering intuitive, high-performance features and pixel-perfect user experiences. Own features end to end, make technical and product decisions, collaborate across design and engineering teams, run experiments, optimize performance, integrate APIs and AI model outputs, and proactively improve product quality and usability.

Build and optimize native iOS flight search and shopping experiences using Swift, SwiftUI, UIKit, and modern iOS SDKs. Develop responsive booking flows, fare comparison, seat maps, checkout features, networking, caching, and data persistence. Apply clean architecture, concurrency, testing, and performance profiling. Collaborate with product, backend, and UX teams while mentoring junior developers and using AI-assisted development tools.

Own the creator-facing iOS app end to end, from architecture and Swift implementation through launch and iteration. Improve native design quality, reliability, performance, and scalability while shipping ambiguous product goals with founders, design, and backend teams. The role requires primary ownership of mobile, AI-assisted development workflows, and building engineering practices for future mobile hires.

Own the iOS product end to end, including architecture, technical standards, and feature development. Build polished, animation-heavy consumer experiences, make architectural decisions, and collaborate closely with founders to shape products from concept through launch. Ensure the app remains fast, stable, scalable, and easy to evolve while delivering frequent, high-quality releases. This is a senior individual contributor role without people-management responsibilities.

Build and ship native iOS features in Swift, manage EAS builds and App Store submissions, and contribute to React Native and TypeScript code when needed. Work within Supabase and related backend systems, submit reviewed GitHub pull requests, debug test-user feedback, identify launch requirements, and communicate progress and blockers independently. This is project-based, part-time work reporting directly to the founder.

Build and maintain Stripe Identity mobile SDKs and verification experiences for iOS, Android, and React Native. Develop secure document and selfie capture flows, reusable APIs, integrations with backend services, and reliable mobile software. Improve performance, testing, observability, accessibility, release processes, and backward compatibility while collaborating with product, design, machine learning, backend, and research teams.

Staff iOS Engineer responsible for defining Radar’s mobile architecture and cross-platform strategy while rebuilding its applications. The role remains hands-on with Swift and SwiftUI, leads complex cross-functional initiatives, establishes engineering standards, mentors senior engineers, and guides legacy app migration and support. Preferred experience includes Kotlin Multiplatform, modular architecture, build optimization, configurable UI, newer Apple capabilities, gRPC, Protocol Buffers, streaming, and network performance tuning.

Develop and architect scalable iOS applications serving millions of users. Collaborate with Product, Design, and Engineering to deliver features, promote clean architecture and iOS best practices, monitor performance and crash analytics, and guide technical excellence. Requires strong Swift, SwiftUI, MVVM, API integration, persistence, testing, and code quality expertise.

Provides technical leadership across FOX News iOS and tvOS platforms by architecting scalable applications, setting platform strategy, improving developer tooling, and mentoring engineers. The role owns application performance, reliability, testing, observability, and release standards; partners cross-functionally on product delivery; integrates Apple frameworks and third-party SDKs; and leads initiatives involving automation, AI-assisted development, streaming, and media technologies.

Build polished iOS interfaces by translating UX/UI designs into scalable, high-performance applications. Responsibilities include developing with Swift, UIKit, SwiftUI, and iOS technologies; optimizing performance across devices; collaborating with designers; and managing the full software development lifecycle from concept through deployment. The role also involves maintaining app architecture, implementing coded design systems, and delivering seamless user experiences.

Develop and ship high-performance iOS applications and camera experiences for Snapchat. Responsibilities include designing and implementing tested Objective-C software, launching features, evaluating technical tradeoffs, collaborating with Design, conducting code reviews, and using AI tools while maintaining strong standards for correctness, security, performance, and scalability.

Build and lead development of native iOS mobile applications for large-scale customer experiences. Provide technical leadership in mobile architecture, API design, reusable components, testing, performance, accessibility, feature flags, staged rollouts, BFFs, and Server-Driven UI. Mentor engineers, establish engineering best practices, and promote AI-assisted development. Collaborate with software engineers, designers, and product managers in Agile teams to deliver high-quality mobile products.

Build and evolve Notion’s iOS platform, including shared frameworks, architecture, testing, build systems, observability, CI/CD, and release-quality tooling. Partner with mobile AI and core product engineers to improve developer workflows, evaluate iOS capabilities, and drive adoption of platform standards. Use AI tools and agents to enhance engineering productivity while supporting a reliable mobile application used by millions.

Develop and release scalable mobile features primarily with React Native and TypeScript for iOS and Android. Integrate React Native into existing native applications, build native modules, make architecture decisions, optimize performance and accessibility, and contribute to testing, CI/CD, monitoring, documentation, and releases. Collaborate with product and engineering teams, conduct code reviews, mentor developers, support technical planning, and promote responsible use of AI-assisted development tools.

Lead prototyping and development of complex Slack iOS experiences from concept through production. Partner with Product, Design, Backend, and mobile engineering teams on ambiguous, cross-functional initiatives. Shape product direction, establish mobile engineering best practices, optimize performance and reliability, influence technical decisions, and mentor engineers. The role requires deep Swift and modern iOS expertise, strong architectural knowledge, and the ability to lead organization-spanning initiatives.

Develop and architect scalable iOS applications used by millions of customers. Lead mobile engineering practices involving clean architecture, dependency injection, performance optimization, testing, reliability monitoring, and maintainable code. Collaborate with Product, Design, and Engineering teams to deliver features, stay current with iOS technologies, and promote technical excellence across the iOS engineering community.

Lead iOS engineering for the Subscription Growth team, building and improving premium subscription experiences, paywalls, upsell experiments, and promotional offers. Develop high-quality, testable solutions, refactor architecture, support automated app builds and releases, and collaborate across iOS, Android, web, backend, and infrastructure teams. Provide technical leadership, mentorship, and guidance on design, security, testing, deployment, and rapid experimentation.

Develop and architect scalable iOS and Android applications using React Native and TypeScript within a brownfield native codebase. The role involves integrating native modules, making React Native versus native architecture decisions, improving performance and accessibility, reviewing code, supporting automated testing and CI/CD, mentoring developers, and collaborating with Product, Design, QA, Backend, and mobile engineering teams.

Owns the end-to-end development of iOS monetization experiences, including paywalls, pricing, subscriptions, upgrades, and purchases across global storefronts. Partners with product, design, analytics, finance, and legal to prototype, experiment, launch, and optimize reliable consumer-scale features. Responsibilities include architecture, performance optimization, staged rollouts, code reviews, mentoring, and advancing AI-native engineering practices.

Build and scale Airbnb’s AirChatUI AI prototyping harness and native macOS/iOS applications. Lead architecture and implementation across web prototyping, iOS deployment, AI agent integrations, AirChat tooling, and Kyber platform integration. Develop declarative UI features, collaborate with infrastructure, product, security, and design teams, and establish scalable iOS patterns. Enable designers and product managers to create production-oriented prototypes while maintaining quality, accessibility, performance, availability, and release standards.

Build, ship, and maintain scalable iOS features used by millions of users. Responsibilities include writing Swift code with modern iOS frameworks, designing reusable components, managing asynchronous workflows, improving performance and reliability, debugging production issues, contributing to architecture and testing strategies, participating in code reviews, and collaborating with product, design, and engineering teams through release and iteration.

Design, implement, test, release, and maintain scalable iOS application features. Collaborate with engineering and product teams, optimize application performance, produce documented code, estimate work, and maintain CI/CD pipelines. Requires strong Swift, SwiftUI, UIKit, concurrency, REST API, testing, Git, App Store submission, and continuous delivery experience.

Build and maintain scalable iOS applications for crypto perpetuals trading. Design high-performance mobile experiences with real-time market data, charting, order entry, position management, and risk-aware workflows. Partner with product, design, backend, and data teams; improve performance, observability, reliability, and release stability; lead technical planning; resolve incidents; mentor engineers; and establish architecture, testing, documentation, and engineering standards.

Develop and ship iOS mobile features using Swift, SwiftUI, and Swift Concurrency. Collaborate with Product, Design, and Engineering teams to scope and deliver customer-focused solutions. Participate in code and design reviews, write high-quality tests, integrate RESTful services, document systems, and improve platform reliability and engineering efficiency.