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.

Build Android fitness app features with React Native and Expo, using Claude for AI-assisted development and agentic workflows. 1-month contract fully remote.

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.

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.

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.

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.

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

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.

Rightmove★3.7 (31)· London

You'll work primarily in Java and Spring Boot, operating across frontend, mobile, data, and infrastructure to lead architectural design and standards across Rightmove's consumer product domain—property search, listings, saved searches, maps, and valuations serving millions of users. This principal role involves mentoring senior engineers and tech leads, guiding large cross-team initiatives, and shaping long-term platform direction across approximately 60 engineers in the consumer domain.

Apple★4.1 (14k)· London

You will work with Swift, SwiftUI, UIKit, Core ML, MLX, and Foundation Models to help Apple's largest customers build AI-powered business applications across iOS, iPadOS, watchOS, macOS, and visionOS. As a hands-on technical expert, you'll partner directly with customer engineering teams to guide development and deployment of intelligent apps, build reference implementations, and shape best practices for AI adoption on Apple platforms. The role involves collaborating with internal stakeholders, engaging executives, and supporting EMEIA business and education customers.

JPMorgan★3.9 (20k)· London

Director of Software Engineering leading multiple engineering teams building J.P. Morgan Personal Investing's Investment Platform—a suite of mobile and web apps serving over 275,000 UK investors. You'll drive technical strategy around distributed systems, cloud-native architectures, DevOps, and agentic AI-enabled development workflows while scaling teams, managing engineering budgets, and ensuring reliable, secure systems aligned with fintech regulatory requirements.

You'll work with C++, mobile platforms (iOS, Android, macOS, Windows), CMake, CI pipelines, and AI-assisted workflows to build automated reliability foundations for Titan, Supercell's engine powering top-grossing mobile games. The role focuses on validation systems, regression detection, and end-to-end testing across real devices, helping engine teams move faster while reducing risk to games reaching millions of players. You'll partner across client, server, and live-ops teams to establish testability and reliability practices for this new, autonomous Reliability team.

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.

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 lead a team of Analytics Engineers working with SQL, cloud data warehousing, transformation tooling, and data modelling across a defined business domain at Deliveroo, a three-sided marketplace for food delivery and shopping. You'll own data pipelines, models, and metrics powering decision-making, drive data products practices, and contribute to analytics standards across the organization. The role manages a team of IC Analytics Engineers, with responsibility for their performance, development, and technical roadmap delivery.

Deliveroo★3.3 (1.5k)· London

You'll work primarily with Go, TypeScript, Kotlin, and Python to build quality systems for Deliveroo's three-sided marketplace serving millions of users. The Code Context team empowers 5,000+ engineers across DoorDash subsidiaries by architecting test coverage reporting, automated quality gates, and AI-assisted development workflows while reducing technical debt. You'll report to the Developer Lifecycle group within the Foundations organisation.

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.