Top IoS Developer Jobs in London

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.

Develop and maintain native iOS features for the Nutmeg investment application using Agile practices. Own work from estimation through release and production support, troubleshoot defects, write unit and UI tests, participate in code reviews, and contribute to technical improvements. Collaborate with Product, Operations, and engineering teams while supporting releases, knowledge sharing, monitoring, and continuous improvement of the iOS codebase and development processes.

Build and lead production iOS features for an AI-powered travel and expense platform. Design conversational and context-aware experiences using Swift, SwiftUI, modern concurrency, reactive patterns, and robust networking. Integrate LLM-driven capabilities, streaming APIs, offline support, notifications, analytics, experimentation, and privacy-focused state management. Collaborate with product, design, and backend teams while using AI coding tools and maintaining high code quality.

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.

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.

Build and improve Zopa’s native iOS banking app within the Mobile Platform team. Responsibilities include developing customer-facing features with Swift, improving app performance and reliability, resolving bugs, contributing to shared architecture and developer tooling, and collaborating with Product, Design, Backend, React Native, and other iOS engineers. The role also involves promoting engineering standards, testing, accessibility, observability, and maintainable mobile development practices.

Design and maintain centralized iOS SDKs, libraries, and core toolkits; own modular architecture; optimize build times, dependencies, testing, and CI/CD pipelines; establish engineering standards; and collaborate with feature teams to integrate shared SDKs. The role requires deep Swift expertise, experience with distributed frameworks, scalable iOS architecture, mobile automation, developer tooling, and cross-team technical influence.

Build and maintain iOS payment experiences for wallet balances, checkout, withdrawals, refunds, seller onboarding, and tax capture. Contribute to migrating payment surfaces from UIKit to SwiftUI, write automated tests, handle complex state and edge cases, and own features end to end. Collaborate with backend engineering, product, design, and senior engineers while supporting globally compliant marketplace payment flows.

Develop and maintain accessible, secure, user-focused iOS applications using Swift. Translate requirements into reliable solutions, write tested and maintainable code, integrate APIs, participate in code reviews and architectural decisions, and contribute to CI/CD. Diagnose defects and performance issues while collaborating with designers, product managers, QA, and developers in an agile multidisciplinary team. Support engineering standards, documentation, knowledge sharing, mentoring, and modern Apple platform practices.

Build, develop, and deploy high-performance iOS applications and scalable SDKs. Design modular architectures, optimize performance and accessibility, implement concurrency, and maintain automated testing and CI/CD practices. Lead feature delivery, communicate technical trade-offs to clients, mentor junior developers, contribute to engineering communities, and collaborate across distributed teams. Core expertise is Swift and iOS, with opportunities to work with React Native and Flutter.

Build and evolve Zopa’s native iOS platform, including shared modules, APIs, architecture, developer tooling, design systems, observability, and CI/CD. Deliver production-quality Swift and SwiftUI code, improve performance and reliability, shape technical standards, and collaborate across engineering, product, design, backend, and Android teams. Coach engineers through pairing, code reviews, technical discussions, and knowledge sharing.

Build and own Nevis’s native iOS and iPadOS app from architecture through App Store release. Collaborate with design, backend, and AI teams to create polished, responsive, secure, accessible, and offline-capable experiences for financial data and streaming AI workflows. Own performance, networking, testing, observability, crash-free quality, provisioning, phased rollouts, and release processes while rapidly prototyping and iterating on product experiences.

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.

Design, build, and maintain high-quality iOS applications using modern Apple technologies. Own features end-to-end, collaborate with product, design, and backend teams, write clean testable code, debug and improve performance, and contribute to architecture and best practices.

As an iOS Engineer at Freetrade, you will develop and maintain the iOS app, collaborate with cross-functional teams, ensure high performance, quality, and customer satisfaction, and guide platform priorities.

The Mobile Engineer (iOS) will develop and maintain the iOS app, collaborate with cross-functional teams, ensure app quality, and assist with customer support.

As an iOS Developer, you will focus on building iOS applications, participating in code reviews, testing, and collaborating with the development team.

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.

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.