Native Kotlin and Jetpack Compose development on a consumer-facing Android app for in-store grocery trips, running on a known device inside live stores. Integrates on-device edge AI (ML Kit, TensorFlow Lite) and uses AI coding tools like Cursor or Claude Code. Reports to the Head of Android.

You will own an existing production React/TypeScript application across web, iOS, and Android, integrating with Python/FastAPI backends and managing CI/CD pipelines. The team builds a computer-vision platform that turns video data into actionable insights. You will drive frontend architecture on a small, collaborative engineering team.

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.

Expedia Group★3.8 (1.2k)· London

You will architect and deliver advanced Android solutions using Kotlin, Jetpack Compose, and MVVM/MVI patterns, and integrate AI/ML capabilities into mobile experiences. This role is on the Search and Recommendations Experience team, which owns the end-to-end search and discovery experience across lodging, cars, activities, flights, and packages on Expedia Group’s travel platform. You will provide technical leadership for native search and discovery and mentor mobile engineers across teams.

Funding Circle★3.5 (53)· London

You will work with React Native, React.js, TypeScript, Firebase, Gradle, XCode, REST APIs, and CI/CD for app releases on iOS and Android. The role involves building and scaling a mobile app for Funding Circle’s fintech platform that uses data to provide fast funding to small businesses.

Depop★4.4 (61)· London

Depop seeks a Backend Software Engineer for its Search Retrieval team working with Python or Scala, AWS, and modern cloud infrastructure. You'll collaborate with product managers, data scientists, and mobile/web engineers to build search and information retrieval systems serving 1M+ daily active users on Depop's peer-to-peer secondhand fashion marketplace.

Depop★4.4 (61)· London

You'll architect and lead the technical vision for Depop's iOS application, working with Swift, UIKit, SwiftUI, MVVM/VIPER architecture, XCTest/XCUITest, Swift Package Manager, and CI/CD tools like TestFlight and feature flags. You'll mentor engineers, guide cross-functional teams on iOS strategy, and drive modernization initiatives for the peer-to-peer circular fashion marketplace serving 56 million users. This staff-level role involves shaping long-term platform direction and fostering engineering excellence across the iOS Platform team.

You'll work with Swift, Xcode, Interface Builder, and Auto Layout to build features for ASOS's iOS app serving over 8 million active users across iPhone and iPad. The Customer Experience team focuses on delivering high-quality, accessible interfaces at scale through collaborative, agile development while maintaining code quality and reliability.

You'll develop iOS features using Swift, Xcode, Interface Builder, and Auto Layout for ASOS's fashion e-commerce app, which serves over 8 million active users globally. Working within the Customer Experience team, you'll collaborate cross-functionally to deliver high-quality, accessible user experiences while maintaining code quality, reliability, and adherence to Apple's design guidelines.

JPMorgan★3.9 (20k)· London

You'll develop features for the native iOS Nutmeg app using Swift, Xcode, MVVM + Coordinator architecture, UIKit/SwiftUI, XCTest, and Bitrise CI/CD. J.P. Morgan Personal Investing provides digital wealth management services to 275,000+ UK investors, and you'll own tasks from estimation through release while participating in code reviews and technical initiatives within an Agile squad structure.

Flo Health★4.8 (26)· London

You'll develop iOS features in Swift and Objective-C for Flo, the world's #1 women's health app with 80M+ monthly users, using modern frameworks and internal component systems to build rich, performant interfaces. The role involves ownership across the full mobile product lifecycle—from ideation through release—working on AI-powered cycle predictions and personalized health insights for a privacy-first, clinically-backed platform reaching 1 in 4 women aged 18–44 in the US.

Flo Health★4.8 (26)· London

You'll develop Android features using Java and Kotlin with modern frameworks and in-house components for Flo, the world's #1 women's health app serving 80M+ monthly users across 100+ countries. The role involves building large-scale, polished mobile interfaces, maintaining CI/CD pipelines, and delivering end-to-end product value for a mission-driven team, requiring 7+ years of hands-on Android development experience with proven production apps at scale.

You'll develop iOS features for Freetrade's investment platform using Swift, SwiftUI, and UIKit, with a tech stack including MVVM-C architecture, RxSwift, Factory dependency injection, and Apollo GraphQL. The iOS team builds user-facing features for customers investing across UK, US, and EU markets while collaborating with backend, design, product, and QA teams to ship new functionality like mutual funds and AI-driven experiences. Expect 3-5 years of iOS production experience, strong knowledge of Swift, SwiftUI, reactive programming, and mobile architecture patterns.

You'll develop the Freetrade iOS app using Swift, SwiftUI, MVVM-C architecture, RxSwift, Factory dependency injection, and Apollo GraphQL API, building investment features like mutual funds and bonds. Freetrade is reshaping retail investing across UK, US, and EU markets. You'll collaborate across mobile, backend, design, and product teams while contributing to architecture, code quality, and customer support.

Deliveroo★3.3 (1.5k)· London

You'll design and build production-grade machine learning systems for Deliveroo's search and recommendations platform using Python, PyTorch or TensorFlow, working with recommendation systems, NLP, ranking algorithms, and generative AI. The New Verticals Personalisation team powers customer discovery across grocery, convenience, and retail delivery categories within DoorDash's three-sided marketplace. You'll provide technical leadership across multiple product areas, mentor junior engineers, and help shape product strategy alongside engineering and product leaders.

Deliveroo★3.3 (1.5k)· London

You'll own the full ML lifecycle for Deliveroo's customer support and decision systems, working with Python, Docker, Kubernetes, and CircleCI to build, deploy, and monitor production models including LLM-powered automation and agentic AI projects. The Care team tackles high-impact problems in customer experience and trust within a three-sided food delivery marketplace serving millions globally.

Deliveroo★3.3 (1.5k)· London

You'll design and productionize machine learning models using strong software engineering principles to solve complex problems across Deliveroo's three-sided marketplace. Work spans rider pricing optimization, delivery time prediction, and recommendation systems for grocery and retail discovery. You'll collaborate with software engineers, data scientists, and product managers to ship end-to-end ML solutions driving measurable impact at global scale.

Canva★4.3 (32)· London

You'll build high-performance UIs in C++ and Objective-C for the Affinity product suite, optimizing code for responsiveness and memory while working on native macOS and iOS interfaces supporting mouse, touch, and stylus input. The Affinity team at Canva creates photo editing, vector design, and layout applications for creatives. You'll contribute to architectural decisions across shared libraries and collaborate with design and QA teams.