Senior Mobile Developer (Android) – Contractor

Senior Mobile Developer (Android) – Contractor Hawk-Eye Innovations Join Hawk-Eye Innovations as a Senior Mobile Developer (Contractor) We’re looking for an experienced Senior Mobile Developer (Android) to join our Tracking team on a contract basis, supporting the development of an in-house mobile application used in live sports tracking and testing environments. This role is focused on Android development using Kotlin, working closely with camera pipelines, real-time video capture, and on-device machine learning. The application is currently used in Cricket, with scope to expand into other sports. This is an urgent contractor requirement, ideally suited to a UK-based contractor, with occasional in-person testing at sports venues as required. What You’ll Be Working On You’ll be contributing to a production in-house Android application used internally by Hawk-Eye’s tracking and development teams. Key areas include: Enhancing and modernising an existing Android application Improving performance, stability, and user experience Working directly with mobile camera pipelines using the Android Camera 2 API Integrating and running machine learning models on-device to support: Ball tracking Player tracking Optimising threading models, lifecycle management, and performance for real-time workloads Supporting hands-on testing in live sports environments, including occasional on-site testing at sports venues Collaborating closely with Tracking and Computer Vision teams to ensure clean system integration Key Responsibilities Lead best practices for Android mobile development Design, develop, and maintain high-quality Kotlin-based Android applications Own complex features from design through to delivery Work closely with developers across Tracking, Tooling, and Computer Vision Support testing, debugging, and deployment of new features Participate in technical discussions and code reviews Contribute pragmatically in an agile, sprint-based environment Tech Stack and Experience Requirements (Senior Level) Essential: Strong, hands-on experience in Android development using Kotlin Deep understanding of Android application architecture, lifecycle, and threading Proven experience working with the Camera 2 API in production Experience building high-performance, real-time mobile applications primarily using Kotlin Solid understanding of software design principles and clean code practices Comfortable working independently and taking ownership as a contractor Highly desirable: Experience running or integrating machine learning models on mobile devices Understanding of on-device performance optimisation for video or ML workloads Experience with mobile video capture or processing pipelines Bonus skills: FFmpeg OpenCV Networking AWS iOS development Engagement Details Contract role UK-based preferred Primarily remote, with occasional on-site testing at sports venues Equal Opportunity Employer Hawk-Eye Innovations, part of Sony Sports Businesses, is committed to creating a diverse and inclusive environment. We engage contractors fairly based on skills, experience, and professional capability, and aim to create a respectful and inclusive working environment for all.