Senior Mobile Developer (Android) – Contractor

Hawk-Eye Innovations (HEI); United Kingdom; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading sports technology company in the UK is seeking a Senior Mobile Developer (Android) on a contract basis to enhance an in-house mobile application used in live sports tracking. The role involves developing high-quality Android applications using Kotlin, focusing on camera pipelines and integrating machine learning models. This position requires strong experience with the Android Camera 2 API and is primarily remote with occasional on-site testing at sports venues.

Qualifications

• Strong, hands-on experience in Android development using Kotlin.
• Proven experience working with Camera 2 API in production.
• Experience building high-performance, real-time mobile applications.

Responsibilities

• Lead best practices for Android mobile development.
• Design, develop, and maintain high-quality Kotlin-based Android applications.
• Support testing, debugging, and deployment of new features.

Skills

Android development using Kotlin

Android Camera 2 API

Machine learning models integration

Performance optimisation

Software design principles

Tools

FFmpeg

OpenCV

AWS

Job description

Senior Mobile Developer (Android) – Contractor – Hawk-Eye Innovations

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.