Expedia Group★3.8 (1.2k)· London

The iOS engineer will work with Swift, SwiftUI, Xcode, Git, and AI-assisted tools like Claude Code, handling UI patterns, animations, testing, and debugging. They join Expedia Group’s Design System team, building reusable UI patterns and experiences across the company’s travel platforms. The team’s scope isn’t specified.

Build and maintain the company’s platforms using JavaScript, Node.js, Next.js, Express.js, React/React Native, .Net 4.8/9/10, C#, HTML/CSS, and API Restful Services. You will develop both web and mobile applications, collaborating with the team while working independently.

Tripadvisor★3.9 (142)· London

Android Engineer role working with Kotlin, Coroutines, Jetpack Compose, Cursor, and GraphQL in a modular, clean-architecture MVVM layout. You will build and release code for the Tripadvisor Experiences mobile app, collaborating with product and designers on the full software lifecycle. This is a full-stack role where you primarily develop Android systems, with occasional back-end projects.

Tripadvisor★3.9 (142)· London

You will work with Kotlin, Coroutines, Jetpack Compose, Cursor, GraphQL, and MVVM in a clean-architecture modular layout. You’ll join the Tripadvisor Experiences mobile team, focusing on Android app development with occasional backend microservices work.

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.

You will work with Solidity, React, Node.js, TypeScript, GraphQL, React Native or Flutter, and Ethereum or Binance Smart Chain. This consulting company builds web, mobile, and Web3 applications with blockchain integration.

React, Node.js, AWS, TypeScript, React Native, RESTful and GraphQL APIs, serverless architectures, CI/CD, PostgreSQL, DynamoDB, and AI tools such as Claude and GitHub Copilot. Build and ship digital products for a pre-IPO challenger bank serving mass affluent clients, owning full-stack work from architecture to production monitoring.

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.

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.

Build and enhance customer-facing and internal web applications using Next.js, React, TypeScript, and GraphQL. The Web Engineering team creates the web experiences powering customer acquisition, servicing, and internal tools at Zopa.

Build full-stack mobile applications using React, Node.js, AWS, React Native, TypeScript, JavaScript, GraphQL APIs, serverless architectures, CI/CD, PostgreSQL, and DynamoDB. You'll design, develop, and ship digital products for Monument, a challenger bank serving the mass affluent, with ownership from architecture to production.

Depop★4.4 (61)· London

This Senior Backend Engineer role uses Scala (primary), TypeScript, Python, Play Framework, Kubernetes, PostgreSQL, DynamoDB, and Kafka. The Shipping Experience team builds and evolves the end-to-end shipping journey for buyers and sellers on Depop’s peer-to-peer circular fashion marketplace.

Works with SAST, DAST, SCA, Burp Suite, OWASP ZAP, Semgrep, Python, Java, Kotlin, Go, JavaScript, and CI/CD pipelines (GitHub Actions

Proton★5.0 (1)· London

As a Senior Front End Engineer on the Standard Notes team, you will work with JavaScript, TypeScript, React, ES6, Playwright, Jest, and Grafana. The team builds a secure note-taking and productivity platform, developing features like encrypted search and cross-platform sync using end-to-end encryption. All Standard Notes codebases are open source.

Proton★5.0 (1)· London

You will work with PHP/Symfony for backend services, React for frontend, Kotlin (Android) and Swift (iOS) for mobile, with a growing shared Rust codebase, on Kubernetes infrastructure. The Payments team builds and scales payment methods and client libraries to enable subscriptions across Proton’s encrypted email, VPN, Drive, Pass, and Calendar products. The team works closely with the Account and Finance teams and across all business units.

Proton★5.0 (1)· London

Engineering Directors at Proton set technical direction and work with PHP (Symfony), Rust, Python, Swift, Kotlin, Jetpack, Typescript, React, C#, SQL, Redis, MySQL, and Ceph across mobile, desktop, web, and backend platforms. They lead engineering for one of Proton’s existing or upcoming products—such as Proton Mail, VPN, Calendar, Drive, or Pass—which provide private, secure, open-source tools to over 100 million users. The role involves managing a team of managers and driving DevSecOps practices.

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

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.

You'll build fullstack features using React, React Native, TypeScript, Go, Node.js, GraphQL Federation, gRPC, and Kubernetes on Juniper, a GLP-1 weight-management program combining medication with personalized nutrition and clinician-led care. The Shop/Ecosystem squad expands Juniper into new product lines and develops recommendation tools in collaboration with Data Science, working across web and mobile platforms. This is a high-autonomy senior role owning features from design through delivery.

You'll work with React, TypeScript, React Native, GraphQL Federation, Go, gRPC, Pub/Sub, Kubernetes, and GCP on Juniper, a large-scale weight-management program combining GLP-1 medication with personalized nutrition and clinician-led care. As a senior frontend engineer in the Growth squad, you'll own the frontend web platform, design and deliver growth-focused experiments improving retention and conversions, and mentor teammates while influencing best practices across the team.

You'll build fullstack features using React, React Native, Go, Node.js, TypeScript, GraphQL Federation, gRPC, and Kubernetes on Juniper, a large weight-management program combining GLP-1 medication with personalized nutrition and clinician-led care. The Shop/Ecosystem squad expands Juniper into new product lines and services, including a recommendations tool developed with Data Science for web and mobile platforms. You'll collaborate cross-functionally to implement scalable solutions and mentor other engineers in a high-autonomy senior role.

JPMorgan★3.9 (20k)· London

You'll work with React, JavaScript, TypeScript, React Native, REST APIs, and GraphQL to build front-end solutions for Chase UK, JPMorgan's digital banking platform launching across the UK. The role involves designing and delivering cloud-native microservices applications while mentoring junior developers and collaborating with cross-functional teams in a flat-structure, tribe-and-squad organization.

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.