You will work with backend development, databases, APIs, cloud services and production machine learning systems. This is for a growing technology business. No specific project or team size is mentioned.

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.

Google★4.3 (6.2k)· London

You'll work on Android with Java and Kotlin for the Growth Systems and App Foundations team. This role builds the foundational and growth-oriented systems that power Google's Android apps at massive scale.

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'll build backend services and microservices using Rust, Go, Python, and Java for X Money, xAI's global payment network targeting 600+ million users. The role involves designing high-scale, low-latency distributed systems for payments, fraud detection, and compliance while collaborating with iOS, Android, and web teams on full-stack features in a startup-like environment.

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.

Lead Android (Kotlin) and iOS teams, architecting mobile products used by tens of millions of phones globally. Own multi-squad department strategy, code reviews, and next-gen tooling including Kotlin Multiplatform. Partner with C-suite on engineering roadmap and commercial outcomes.

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.

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.

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.

Build scalable backend services and APIs with Go, Python, or C++, and develop frontend applications using React and TypeScript. You will ship AI-powered product features end-to-end on a platform combining computer vision, multimodal AI, and real-time data. Work closely with AI and platform engineers on new capabilities within a small, experienced team.

Google★4.3 (6.2k)· London

Work with HTML, CSS, JavaScript, HTTP, Java, C/C++, Python, Node.js, TypeScript, RESTful APIs, OAuth2, JSON webhooks, GCP, Dialogflow, and Gemini. You will lead end-to-end conversational messaging solutions, building chatbots and integrating agentic experiences for the Android and Business Communication Partner Engineering team.

You'll work with Python, TypeScript, Java, Go, and cloud environments (AWS, Azure, GCP) to build the UK's first zero-commission Options and Stocks trading platform. You'll join a founding engineering team of 4, owning core features end-to-end.

Backend Nest.js and TypeScript; frontend Angular (v20) and Ionic; Azure CI/CD for multiple daily deployments. You maintain the ZigZag Puppy Training mobile app (iOS and Android), shipping full-stack features and guiding backend architecture and API design.

Senior software engineers work with Nest.js, TypeScript, Angular, Ionic, and Azure CI/CD on the ZigZag dog-training mobile app (iOS/Android). This full-stack individual contributor role leads backend design, APIs, data modelling, and infrastructure decisions on a small, collaborative team.

You'll work with Adobe Creative Suite (Photoshop, Illustrator, InDesign, After Effects, Premiere Pro), Figma, and AI tools like ComfyUI and Midjourney. You'll lead end-to-end creative production for marketing, event, and digital assets at Ultralytics, turning complex vision AI into clear visuals for the company that creates the leading YOLO AI models.

You’ll work with Rust or Python, designing hardened sandboxed runtimes, building CLI tools, and implementing tracing/telemetry for distributed systems. Indices is building infrastructure that turns any website into a deterministic, programmable API for AI agents.

You will work with Nest.js, TypeScript, Angular (v20), Ionic, and Azure CI/CD pipelines to build and maintain the Zigzag puppy training mobile app across iOS and Android, handling the full stack with a backend focus on APIs and data modelling.

Lead Graphic Designer at Ultralytics (AI/computer vision) will use Adobe Creative Suite (Photoshop, Illustrator, InDesign, After Effects, Premiere Pro), Figma, and AI tools like ComfyUI and Midjourney. They own end-to-end creative production for campaigns, social, web graphics, event branding, and motion content, supporting adoption of Ultralytics YOLO AI models.

You will work across the full stack using Python, TypeScript, Java, or Go in cloud environments (AWS, Azure, GCP). The team is the founding engineering team of four building the UK’s first zero-commission options and stocks trading platform.

You will work with JavaScript, TypeScript, and offensive security tools for penetration testing, reverse engineering, and vulnerability assessments. You join a specialist security team at a global leader in Computer Vision, AI, and biometric identity, acting as the bridge between Security and Engineering to embed security throughout web application development.