Mobile App Developer

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