Top IoS Developer Jobs in London

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.

Build and maintain production-grade iOS applications using Swift and SwiftUI, integrating AI through backend APIs. Design reliable AI interaction patterns, optimize performance and memory, support concurrency and background tasks, capture user feedback, and collaborate with backend and machine learning engineers. Maintain App Store quality, monitor production issues, and deliver responsive, stable, and efficient user experiences.

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 Staff Android Engineer will own and evolve the Android platform, lead system design, and mentor engineers to improve mobile architecture and workflows at AlphaSense.

As a Staff iOS Engineer, you'll define architecture, enhance the iOS platform, and mentor engineers, focusing on reliability and AI-driven mobile engineering practices.

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

Own the React Native application end to end, including architecture, performance, releases, app-store presence, and roadmap. Lead and mentor two mobile engineers, establish technical direction, and collaborate on engineering and product strategy. Deliver polished iOS and Android experiences, run experiments, measure growth and retention impact, and iterate rapidly. The role may help expand the mobile team as the app grows.

Develop and maintain Billetto's iOS consumer and organiser apps. Build native Objective-C features, custom UI components and animations, integrate REST APIs and analytics, use third-party SDKs, and collaborate within an agile startup team to ship App Store releases.

You will develop an iOS application, optimize it for performance, and collaborate with cross-functional teams, engaging users for feedback.

As a Senior iOS Engineer at Proton, you'll build privacy-focused mobile apps, mentor team members, and work on scalable architecture and user experience.

As a Senior Mobile QA Automation Engineer at Proton, you will conduct manual and automated testing for iOS and Android applications, collaborating with development and support teams to ensure product quality.

Develop and execute automated tests for mobile applications, influence design and technical requirements, collaborate with developers, and maintain high-quality standards.

Proton seeks a Senior iOS Engineer with extensive Swift experience to build mobile features across products, ensuring privacy and usability for users. Responsibilities include architectural design, mentoring peers, and contributing to a robust codebase.

As a Senior iOS Engineer at Proton, you'll design and implement features for iOS apps, mentor other engineers, and contribute to robust architecture and API design, ensuring high-quality user experience while collaborating with cross-functional teams.