Starling★3.5 (66)· London

Work with Swift (iOS) and Kotlin/Java (Android), native mobile security APIs and cryptography, and public cloud IaaS. You will design, build, and maintain security controls for the company’s Android and iOS mobile banking applications as part of the Cyber Security team.

Swift, SwiftUI, Structured Concurrency, MVP/MVVM/VIPER, REST APIs, and CI/CD (GitHub Actions). You’ll join the Account Mobile team driving the Wise app’s homepage and features that help users manage cross-currency money, collaborating with product, design, and analytics—alongside 60+ other mobile engineers.

This role develops generative AI applications using Java, Python, React or Angular, LangChain, LlamaIndex, Hugging Face, Docker, Kubernetes, and AWS, with tools like GitHub Copilot. You will build scalable, AI-powered solutions for Citi’s global finance operations.

You will lead mobile development for the BUSY App across iOS, Android, macOS, watchOS, and Wear OS, using Swift, Kotlin, and Apple/Android ecosystems, with BLE and hardware communication as nice-to-haves. Your team builds the BUSY ecosystem—a cross-platform productivity app paired with the BUSY Bar smart multi-tool—at Flipper Devices, creator of Flipper Zero.

Wise★3.5 (42)· London

You'll work with Swift, SwiftUI, Structured Concurrency, VIPER/MVVM, REST APIs, and GitHub Actions. On the Account Mobile team you'll develop the iOS app's homepage and features helping users manage and grow their money, collaborating with 60+ other mobile engineers.

You will develop iOS apps using Swift, SwiftUI, Combine, and Swift Concurrency, with unit testing and peer review. CreateFuture is an AI-native consulting partner building digital products and services for clients like PayPal and adidas.

Wise★3.5 (42)· London

Build iOS features using Swift, with architectures like VIPER or MVVM, and optionally SwiftUI, Structured Concurrency, and CI/CD (GitHub Actions). As part of Wise’s Account Mobile team, you’ll work on the app’s homepage and features for managing cross-currency money, collaborating with 60+ mobile engineers across the company.

You will build production mobile apps for iOS and Android using React Native, TypeScript, and integrate AI, natural-language features, Swift, Kotlin, and Python. The venture-backed startup creates AI-powered software that replaces manual workflows for industrial and operational teams.

Work with Kotlin, Android frameworks, and platform APIs, migrating a mobile app from React Native to a native Android experience. You will join the Mobile Platform team to build technical foundations—architecture, shared libraries, build systems, and analytics infrastructure—for Zopa’s app, its primary customer touchpoint.

Lead a small mobile team building iOS and Android consumer products at a client. You will set technical direction across both platforms, work hands-on with code, and drive AI-assisted delivery using skills, agents, and spec-driven development. The role includes line-managing engineers and owning the team’s performance, delivery, and growth.

Lead a small mobile team building consumer iOS and Android products for a client. You will drive mobile architecture, use AI-assisted development tools and agents, and champion spec-driven delivery. This is a hands-on leadership role at a digital consultancy.

Citi★3.9 (21k)· London

Build and scale AI-powered financial systems using Java, Spring, React/Angular, Python, FastAPI, Docker, and GitHub Copilot within Citi’s global tech environment. You will design generative AI agents, LLM workflows, and RAG pipelines while working on enterprise microservices, mobile, or front-end development. This role is for an individual contributor on an agile team.

You will work with iOS and Android, using AI-assisted delivery tools including reusable skills, agents and spec-driven development. As a hands-on Engineering Manager, you lead a small, autonomous mobile team embedded with a client, building consumer products and line-managing the engineers.

Senior Software Engineer role at Everfox, working with modern C++ on cross-platform desktop (Linux, Windows) and mobile (Android, iOS) apps, plus Java/Kotlin, Swift/Objective-C, Qt, GitLab, Docker, Kubernetes, and Python. You will build and maintain the end-point software layer for the Hardsec product line’s secure browsing and VDI solution, owning design, development, and delivery. You will also coordinate a small team of engineers and manage release planning across multi-platform shipped products.

Omaze★4.3 (6)· London

You will own mobile features across a TypeScript, React Native, and Expo codebase, writing native code in Swift (iOS) or Kotlin (Android) when needed and using EAS build and deployment workflows. Omaze gives its community the chance to win luxury homes while raising money for UK charities.

Tripadvisor★3.9 (142)· London

You'll work across mobile (iOS/Android with Swift/Kotlin), web frontend, backend services, and data layers, using REST/GraphQL. The Tripadvisor Experiences Engineering team builds the platform, mobile apps, and infrastructure that help operators and third parties manage inventory and bookings.

You will work with Swift, SwiftUI, Swift Packages, and GitHub Actions for CI/CD. The UK-based mobile engineering group builds a Server-Driven UI framework for Motorway’s online used-car marketplace connecting sellers with dealers.

Lyst★3.0 (1)· London

You will use Swift, SwiftUI, and the iOS SDK to build native features for Lyst’s fashion shopping platform. Working within a cross-functional product squad, you’ll develop personalized discovery experiences and contribute to the mobile architecture using MVVM, Clean Architecture, and CI/CD tooling like Bitrise and Fastlane.

Wise★3.5 (42)· London

You will use Swift, MVVM or VIPER, and REST APIs as a Senior iOS Engineer on Wise’s Send Experience team, which owns the end-to-end international transfer flow serving millions of customers.

Develop iOS apps using Swift, SwiftUI, Combine and Swift Concurrency, with unit testing and AI tools like Claude Code. The team builds digital products for clients including PayPal and adidas as an AI-native consulting partner.

Trainline★3.9 (17)· London

You'll work with C# (.NET 6-10), AWS Cloud, Docker, Terraform, DynamoDB, PostgreSQL, GitHub Actions, New Relic, and ELK Stack. The Supply Platform & AI Enablement team builds scalable backend platform capabilities that enable Trainline to integrate and manage supply across rail and coach operators. You'll deliver features, contribute to technical decisions, and own the full development lifecycle from code to production.

Use Kotlin Multiplatform (KMP), Flutter, or React Native; integrate TFLite/CoreML and real-time protocols (WebSockets, SSE). You'll build consumer-facing mobile apps and client SDKs for behavioral AI retail solutions, collaborating with ML engineers and product designers.

Tripadvisor★3.9 (142)· London

Work across mobile (iOS/Swift, Android/Kotlin, offline sync, push, auth, REST/GraphQL), web frontend, backend services, and data/infra layers. You will architect long-lasting systems, lead technical design reviews, and drive operational maturity for the Tripadvisor Experiences platform, which helps operators build their businesses and enables third parties to utilize inventory.

Work with Swift, RxSwift, SnapKit, Realm, Sourcery, SwiftGen, SwiftFormat, SwiftLint, Danger, UIKit and MVVM-C architecture on a modular iOS app. The role involves building new features and maintaining existing ones for Engine's SaaS banking platform, which is offered to financial institutions worldwide. Team size is not specified.

Spotify★4.1 (116)· London

Build iOS experiences using Swift for Spotify’s consumer-facing surfaces. The Subscriptions R&D team grows Spotify’s audience and delivers value across the full user journey. You will contribute to reusable mobile foundations, platform capabilities, and participate in experimentation and prototyping.