FULLY REMOTE OUTSIDE IR35 We are recruiting a Mobile App Developer to build a client-facing mobile application that connects securely to our backend environment, where AI capabilities and business workflows are governed by our in-house platform. You will own mobile development from requirements and technical design through testing, release and ongoing improvement, working with backend developers and client stakeholders. Key responsibilities * Develop and maintain the mobile application for the agreed iOS and/or Android scope. * Contribute to selecting an appropriate native or cross-platform approach. * Translate user journeys, designs and business requirements into accessible mobile experiences. * Integrate the application with backend APIs, including the exchange and validation of JSON data. * Implement authentication, session management, secure local storage and user access behaviour. * Present AI-generated information and workflow results clearly, including loading, progress, error and review states. * Keep privileged credentials, AI orchestration and business rules within the approved backend architecture. * Handle unreliable connectivity, interrupted requests, retries and data synchronisation where required. * Implement device capabilities, notifications or file handling within the agreed requirements. * Test supported devices and operating system versions, addressing performance, usability and security issues. * Manage builds, signing, release preparation and app store submissions where applicable. * Maintain documentation, support handover and resolve issues identified after release. Essential experience and skills * Demonstrable experience delivering mobile applications used by real users. * Strong capability in a relevant approach, such as React Native, Flutter, Swift or Kotlin. * Experience integrating REST APIs and handling structured JSON data. * Understanding of mobile authentication, permissions, secure storage and application lifecycle behaviour. * Experience building responsive interfaces for different screen sizes and device capabilities. * Practical knowledge of testing, debugging, crash reporting and performance optimisation. * Experience with version control and repeatable build and release processes. * Ability to work independently and communicate effectively with clients and technical colleagues. Desirable experience * Published applications or experience managing app store releases. * Applications connected to AI services or workflow platforms. * Push notifications, offline functionality, streaming responses or real-time updates. * Mobile accessibility and automated device testing