Top Senior iOS Developer Jobs in Boston, MA

Architect, build, and maintain iOS connectivity software linking WHOOP hardware, mobile apps, and cloud services through BLE, Wi-Fi, and other protocols. Improve reliability, performance, power efficiency, background processing, synchronization, and data transfer. Establish scalable, testable architecture; reduce technical debt; improve testing and code review standards; coordinate with firmware and cross-functional teams; and manage iOS release, signing, testing, and App Store submission processes.

Build and lead core iOS platform capabilities, including architecture, navigation, shared UI, networking, persistence, and feature flagging. Drive technical planning for complex initiatives, deliver Swift-based features, and improve reliability, performance, testing, observability, and release practices. Establish engineering standards, contribute to architectural decisions, collaborate cross-functionally, and mentor engineers while supporting a maintainable, high-quality iOS codebase.

Build and lead core iOS platform capabilities for WHOOP’s regulated healthcare offerings. Develop Swift features, shared architecture, networking, persistence, and UI components while improving reliability, performance, testing, observability, and release practices. Lead technical planning for complex initiatives, collaborate with cross-functional teams, establish engineering standards, and mentor engineers. The role supports secure Medicare and Medicaid experiences and clinical behavior-change programs.

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, 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.

Develop and maintain robust, accessible, and performant native iOS applications using modern Swift technologies and architectures. Collaborate with product, architecture, UX, and platform teams to define roadmaps, engineering standards, tooling, and design patterns. Build product features and UI infrastructure, write automated tests, modernize codebases, support App Store releases, and contribute through code reviews, mentoring, pair programming, and mobile engineering expertise.

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.

Design, implement, launch, and maintain user-facing features for the Verily Me iOS app. Collaborate with product, UX, test, and engineering teams to ensure cross-platform consistency, regulatory compliance, quality, and strong user experience. Participate in code and design reviews and improve mobile developer productivity.

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

Lead development and improvement of a production iOS app used by tens of thousands. Own architecture, UI, networking, local persistence, and automated tests. Collaborate with Android and backend teams, diagnose async and device-specific issues, use Xcode Instruments, CI, and crash/analytics tooling, and drive product-minded technical decisions.

Develop and ship production-quality mobile apps using React Native and native iOS/Android technologies. Write performant, maintainable code, participate in product discussions, support prototyping and internal testing, and test/debug apps across many devices.

Develop high-quality, performant, accessible consumer-facing experiences for Netflix’s iOS app using Swift and GraphQL. Responsibilities include building maintainable code, automation, documentation, server-driven UI infrastructure, and ad experiences. Collaborate with product managers, designers, and engineering teams to scope projects, refine interfaces, design scalable solutions, and balance business, product, and architectural trade-offs.

Lead ownership of the iOS platform: build offline-first apps with local persistence and sync, real-time communication, media capture/uploads, location/scheduling, and polished, accessible UI/UX for multiple user roles.

Lead design and development of high-performance, offline-capable iOS (iPad) and Android apps for mission-critical drone operations. Build real-time maps, video streaming, telemetry overlays; integrate with hardware; optimize battery, memory, and latency; implement offline-first sync; collaborate with backend/hardware teams; mentor engineers and establish CI/CD, testing, and security best practices.

The Core iOS Senior Engineer will lead mobile development projects, troubleshoot issues, and contribute to code reviews, requiring strong experience in Objective-C and mobile software development.

Lead iOS development for Thunderbird: design and improve mobile architecture, optimize performance and security, debug and test across unit/integration/automation, review and document technical decisions, own projects end-to-end, and collaborate with product, UX, and open-source contributors to deliver a scalable, accessible, and maintainable iOS app.

Lead design and development of Thunderbird's iOS app, improving architecture, performance, reliability, security, and accessibility. Own projects end-to-end, debug and test at unit/integration/automated levels, review code, mentor contributors, and document technical decisions while collaborating with product, UX, and open-source community.

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

Founding iOS Engineer to build the app's core intelligence layer. Must implement production CallKit and on-device continuous Speech Framework recognition, integrate with SwiftUI/CoreData, and optionally add Dynamic Island Live Activity via WidgetKit. Equity-only founding role; product details under NDA.