Top iOS Developer Jobs in Seattle, WA

Design, develop, test, and maintain production iOS applications for Brand Expedia. Translate product requirements into scalable mobile solutions, create low-level designs and APIs, integrate data models, and deliver reliable features across apps. Collaborate with product, design, and engineering teams while improving quality through automated testing, observability, performance optimization, code reviews, incident resolution, and continuous delivery. Integrate AI/ML-enabled capabilities safely and effectively.

Design, build, and maintain high-quality native mobile applications for Expedia’s package shopping experience. Lead complex iOS or Android features from technical design through deployment, including API integration, data modeling, testing, performance optimization, monitoring, and incident resolution. Collaborate with cross-functional teams, integrate AI/ML-enabled capabilities safely, and mentor engineers on mobile development best practices, CI/CD, reliability, and code quality.

Build and maintain Layla’s cross-platform Flutter mobile applications for iOS and Android. Own end-to-end feature delivery, including architecture, API integration, data modeling, testing, performance, reliability, and release support. Collaborate with product, design, and backend teams to create accessible conversational travel-planning and booking experiences. Integrate AI/ML capabilities responsibly, contribute to native platform interoperability, improve engineering architecture and standards, and mentor other engineers.

Own the iOS mobile roadmap and technical strategy for Superhuman Mail. Lead high-impact, cross-team engineering initiatives; define the mobile platform’s architecture, technical foundations, and one-to-two-year investment roadmap. Partner with product and engineering leadership on strategy and execution, mentor senior engineers, drive cross-functional alignment, and improve team delivery through AI-native development practices while maintaining high-quality user experiences.

Own the iOS mobile roadmap and technical strategy for Superhuman Mail. Lead high-impact, complex engineering initiatives; define the mobile platform’s architecture, technical foundations, and one-to-two-year vision; partner with product and engineering leadership on strategy and execution; mentor senior engineers; drive cross-functional alignment; and promote AI-native software development practices while delivering reliable, high-quality mobile experiences.

Design, architect, implement, and optimize high-performance iOS camera features (primarily Objective-C). Develop and launch stable mobile features, collaborate with Design, perform code reviews, and leverage AI tools responsibly to accelerate development while ensuring performance, security, and production quality.

Design, implement, and optimize high-performance iOS features and apps using Objective-C and related technologies. Work with design teams, conduct code reviews, evaluate tradeoffs, leverage AI tools to accelerate development, and ensure performance, multithreading, and low-power optimizations for Snapchat's camera experiences.

Build and ship end-to-end features for Augment’s iOS app, collaborate closely with product, design, backend, and fellow iOS engineers, and contribute to architecture, code quality, tooling, and long-term product health. The role emphasizes Swift and SwiftUI development, ownership, thoughtful collaboration, feedback, and effective use of AI-assisted development tools.

Lead hands-on development of user-facing Android and iOS applications, taking ownership from design through production release. Build maintainable, well-tested features, optimize performance, debug unfamiliar systems, and manage app-store publishing. Collaborate with product, design, backend, and users in an agile, remote environment. Use AI coding agents responsibly to accelerate implementation, testing, reviews, infrastructure work, and incident investigation.

Build, test, release, and maintain native Android and iOS applications across a portfolio of consumer mobile products. Use Kotlin, Swift, modern mobile frameworks, automated testing, analytics, experimentation, and AI coding agents to deliver high-quality software. Collaborate with product, design, marketing, operations, and engineering teams, measure user impact, manage app-store releases, and adapt across codebases and product pods.

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.

Own Android and iOS mobile development for a large consumer VPN product. Inherit and modernize existing codebases, integrate native VPN networking libraries, improve security, testing, CI/CD, release management, and app-store compliance. Collaborate with product, design, backend, DevOps, and marketing teams to deliver reliable user-facing features. Diagnose networking issues across mobile and Go components, optimize connection performance, and use AI coding agents responsibly.

Design, develop, test, deploy, and support native iOS applications using Swift. Collaborate with product, design, QA, backend, and business teams to deliver secure, scalable mobile solutions. Own features throughout their lifecycle, contribute to architecture and CI/CD practices, publish App Store releases, monitor application health, troubleshoot production issues, and participate in on-call support. Apply automated testing, secure development, observability, and continuous improvement practices.

Lead development of native iOS features (food tracking, activity logging, weight trends, AI-driven insights), deliver premium UI/UX with modern Apple frameworks, own flagship initiatives (Lock Screen Widgets, Live Activities, health data integrations), shape app architecture and standards, and collaborate cross-functionally while mentoring engineers.

Design, build, and maintain scalable, high-performance iOS applications using Swift. Deliver end-to-end features, integrate with back-end services, implement animations and Auto Layout, ensure test coverage and CI/CD, profile and optimize performance, and mentor team members.

Senior iOS Developer to design and build secure, high-performance iOS apps using Swift (SwiftUI/UIKit). Implement webview integrations (WKWebView/ASWeb), ASWebAuthenticationSession for OAuth/SSO, JavaScript interop, and native features (camera, push, maps). Ensure responsive web content handling and secure data management. Remote role but must be Bangalore-based with weekly (~1 hour) client office visit to collect a device.

Design and build mobile applications (primarily iOS), ensure app performance and quality, define and ship new features with a development team, identify and fix bottlenecks and bugs, maintain code quality and automation, and actively communicate progress and challenges with team members.

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.

The iOS Developer will focus on native iOS app development, requiring expertise in building customer-facing applications using Swift. Candidates must have a Computer Science degree and 8-10 years of experience.

The iOS Developer will build customer-facing native apps, develop mobile applications interfacing with RESTful services, and ensure performance and usability while maintaining high availability and uptime for solutions.

Join the mobile team within Marketplace to develop applications for sellers on a mobile device, focusing on high-performance code and collaboration with PMs and Designers.

As an iOS Engineer, you will build the Sesame app for wearable devices, collaborating with design and firmware teams to create a seamless user experience while maintaining code quality and performance.

Build and maintain production-grade iOS applications using Swift and SwiftUI, integrating AI features through backend APIs. Design reliable AI interaction patterns, optimize performance, memory, battery, and latency, and support monitoring, feedback capture, and root-cause analysis. Collaborate with backend and ML engineers on API behavior, reliability, and user trust while shipping stable App Store experiences.

The role involves designing, developing, and maintaining iOS applications, driving technical architecture, and promoting knowledge sharing within the team.