Top IoS Developer Jobs in London

Develop and deliver native iOS features for the Nutmeg app using Agile practices. Own tasks end-to-end, write tests, participate in releases and code reviews, troubleshoot defects, contribute to technical initiatives, and collaborate across product, operations, and engineering to improve the codebase and tooling.

As a Senior iOS Engineer, you will lead the development of high-volume features for Wise's mobile app, ensuring seamless user experiences and collaborating closely with product teams.

Senior iOS engineer on the Expedia Group Design System team who builds and maintains high-quality, accessible UI patterns and experiences. Leads design reviews, implements complex UI/animations, ensures performance and observability, debugs and monitors production apps, mentors engineers, and uses AI-assisted tools like Claude Code to accelerate delivery.

Design, implement, and deliver high-quality native iOS and/or Android features. Collaborate on architecture, shape long-term mobile strategy, maintain testable code and CI/CD pipelines, and mentor peers to scale mobile apps globally.

Build and maintain Wise's iOS Account experience as part of a cross-functional mobile team. Design, scope, and implement customer-facing features; ensure code quality, performance, scalability, and consistency across platforms; collaborate with product, design, analytics, and other engineers.

Build and iterate Plum's iOS app using Swift and iOS SDK. Write robust, well-tested code, ship to the App Store, collaborate with cross-functional squads, mentor junior engineers, and contribute to product-driven mobile features.

Develop and maintain iOS mobile applications and frontend experiences while contributing to backend services powering mobile network management, device control, and AI-driven safeguarding. Collaborate on architecture, scalability, security, and product direction; deploy, optimize, test, and rapidly iterate features across care, schools, and parent products. Engage directly with users and take ownership from concept through production delivery.

Design, architect, and develop complex iOS applications in Agile Scrum teams. Responsibilities include performance tuning, testing, continuous integration and delivery, UX refinement, security, code refactoring, engineering best practices, client advising, and mentoring team members.

The Software Engineer in Test will design and maintain automated UI test frameworks for iOS applications, promote quality practices, and collaborate with various teams to enhance application quality throughout the delivery lifecycle.

Lead design and implementation of advanced iOS features, architect complex app modules, evolve an in-house Server-Driven UI, maintain mobile CI/CD (GitHub Actions) and App Store workflows, run automated UI testing, collaborate with product/design/engineering, and ensure high standards for mobile engineering and user experience.

The iOS Engineer will enhance customer experiences on ASOS apps, deliver quality features, work with designers, and maintain codebase integrity.

Design, build and maintain scalable, performant iOS applications. Collaborate in Agile teams, contribute to APIs and cloud integrations, perform code reviews and unit testing, troubleshoot front- and back-end issues, and drive quality, performance, security, and continuous improvement.

Design, develop, and maintain Entrust's iOS SDK for document capture. Implement camera capabilities, on-device image processing and ML, integrate RESTful APIs, improve CI/CD and test automation, collaborate with product and design to deliver accessible, high-quality SDK features across devices.

Join the Baldur squad to design and build Spotify's delegated authorization and session management systems. Develop secure, cross-platform C++ libraries and native iOS Swift components for token issuance, refresh, revocation, and on-device credential storage, collaborating with client and backend teams to scale OAuth 2.0 infrastructure used by millions.

Design and ship high-performance, pixel-perfect iOS experiences using Swift, SwiftUI/UISKit and Combine; optimize memory/CPU/GPU; integrate high-throughput APIs or model outputs; own features end-to-end through App Store deployment; collaborate with AI researchers to deliver scalable mobile AI products.

The Senior iOS Engineer will develop and enhance iOS applications and a Mobile SDK, ensuring a premier user experience while mentoring peers and setting technical direction.

As a Senior iOS Engineer, you'll develop and enhance iOS applications, collaborate with designers, ensure code quality, and maintain user experience.

As a Senior iOS Engineer at Flo, you will design, develop, and maintain mobile applications, ensuring high-quality user experiences while collaborating with cross-functional teams. You'll take ownership of the mobile product lifecycle and optimize app performance for users globally.

As an iOS Engineer, you will build new features, contribute to internal tooling, and collaborate with teams to enhance our banking platform.

The iOS Engineer will build and maintain Starling's banking mobile app, focusing on security, user experience, and clean code delivery.

Build and maintain high-quality, scalable iOS applications using Swift and core iOS frameworks. Collaborate with product, design, and engineering to deliver performant, accessible experiences across iPhone and iPad. Contribute to architecture, testing, code quality, and platform evolution within agile cross-functional teams.

Build and maintain native iOS apps for 3D visualization, measurements, and AI-assisted workflows. Implement and optimize UI components, integrate backend APIs and real-time pipelines, write testable Swift code, participate in architecture and code reviews, and troubleshoot performance and device-specific issues while working remotely within EU timezones.

Build and maintain analytics and experimentation instrumentation for ASOS iPhone and iPad apps. Implement event tracking, integrate SDKs (e.g., Optimizely), ensure schema conformity, investigate and fix data quality issues, support experimentation and monitoring, review peer contributions, and maintain testable, reliable code for scalable mobile analytics.

Design, build, and evolve iOS mobile experiences and reusable platform components. Improve scalability, performance, reliability, and developer experience. Collaborate with product, design, and platform teams; participate in code reviews, testing, observability, experimentation, and prototyping. Embrace modern tooling and contribute to long-term technical health and engineering culture.

The Senior iOS Engineer will lead product decisions, enhance the iOS app, maintain app architecture, and ensure excellent user experiences.