Top IoS Developer Jobs in London

Lead iOS platform engineering for Personal Investing, owning the SDLC toolchain, CI/CD pipelines, release processes, architecture, shared app layers, and developer experience. Drive automation, platform modernization, security controls, incident resolution, and adoption of new technologies. Mentor engineers, review code, support technical escalations, and collaborate across Engineering, Security, Product, Operations, and partner teams in a regulated fintech environment.

Build and maintain polished iOS experiences for Wise Account users. Collaborate with product, design, analytics, and Android engineering teams to deliver customer-focused features across native applications and web. Own iOS project quality, architecture, performance, stability, and maintainability while applying modern technologies and best practices. Contribute to technical initiatives and ensure consistency across platforms.

Build and ship iOS features in Swift, writing simple, robust, testable code for Plum’s financial platform. Collaborate with product managers, designers, and engineers; measure and iterate on App Store releases; take ownership of product outcomes; and mentor junior engineers. The role also involves continuous integration, automation, backend technologies, SwiftUI, The Composable Architecture, Combine, async/await, and end-to-end testing.

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.

Build and ship features for Trainline’s iOS app, focusing on media, advertising, and partner experiences. Collaborate with product managers, designers, and engineers to experiment, measure impact, and improve customer experiences. Responsibilities include testing, code reviews, codebase improvement, technical decision-making, mentoring, and owning development through deployment and monitoring.

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.

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 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 scalable iOS applications for ASOS customers worldwide. Develop high-quality, tested features using Swift and modern iOS technologies, collaborate with product, design, and engineering teams, and contribute to application quality, performance, accessibility, maintainability, and platform evolution. The role involves working in agile teams, supporting technical discussions, improving engineering practices, and developing experiences across iPhone and iPad.

Lead the design, development, and maintenance of Freetrade’s iOS application. Own features end to end, collaborate with backend, design, product, and QE teams, improve code quality and engineering practices, resolve complex technical issues, reduce technical debt, mentor junior engineers, and participate in customer support rotations.

Build and ship native iOS features for an AI neobank, owning onboarding, accounts, cards, payments, transfers and AI-assisted journeys. Ensure app quality, performance, reliability, integrate APIs and authentication, collaborate with product, design, backend and AI teams, and iterate using analytics and production feedback.

Lead the architecture, development, performance, release process, and roadmap for SimpleStudy’s consumer iOS app. Mentor existing mobile engineers, establish technical direction, deliver polished native experiences, run experimentation and analytics, manage App Store operations, and collaborate with engineering and product leadership. The role involves Swift, SwiftUI, UIKit, testing, performance optimization, crash monitoring, and potential mobile team expansion.

Build and deliver high-quality iOS experiences used by millions of customers. Develop scalable features with Swift and modern iOS technologies, collaborate with product and design teams, contribute to architecture and technical decisions, improve platform reliability and maintainability, mentor engineers, and use experimentation and customer insights to enhance the app experience.

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.

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.

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.

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.

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

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.

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.

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.

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.