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.

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.

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.

Spotify★4.1 (116)· London

You'll develop Android components in Kotlin that capture listening signals and user behavior across Spotify's mobile apps, building high-quality, well-tested code for business-critical datasets powering royalty reporting, analytics, and personalization. You'll collaborate with Android, iOS, backend, and data teams to deliver end-to-end solutions and improve the architecture and reliability of Spotify's client-side data collection systems at scale.

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.

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.

SumUp★3.4 (84)· London

You'll develop SumUp Consumer's iOS app using Swift, working on KYC flows, card management, savings, open banking, and payment features. The product is a consumer banking app offering seamless payments and financial tools for managing money and supporting small businesses. You'll collaborate cross-functionally with backend engineers, product managers, and designers to ship polished, reliable mobile experiences.

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 develop iOS applications using Swift and Objective-C with UIKit and AutoLayout, architecting scalable solutions for Deliveroo's consumer-facing app serving millions of users in their three-sided food delivery marketplace. The Consumer team owns the primary user touchpoint, and you'll lead technical execution, drive code quality, mentor colleagues, and collaborate with Product and Design to balance feature delivery with technical debt.

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.