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# Mobile App Engineer

- **Company:** Liberty Charge
- **Location:** London, UK
- **Salary:** £65,045.0
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Android Software Development, Apple IOS, Automation of Tests, Software as a Service, Software Code Optimization, Software Debugging, Revision Control Systems, Web Portals, Mobile Application Software, Performance Tuning, Backend, Git, Fastapi, Kotlin, Enterprise Integration, Real Time Data, Graphql, Docker
- **Published:** October 24, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5940255189

## About the Role

At Believ, we are building a culture that attracts and retains the best talent. We are a dedicated and high-performing team, accustomed to working at pace in an ever-evolving industry, and we are looking for people who are as passionate as us about cutting carbon emissions and providing cleaner air for all. The successful candidate will have the following attributes and skills:

 * Proven experience developing and launching mobile applications for iOS and Android.
 * Familiarity with mobile performance profiling tools and debugging techniques.
 * Experience with backend integration for real-time data syncing.
 * Knowledge of Agile development processes and version control tools like Git.

 * Ability to understand and consider the broader business context and long-term implications of technical decisions.
 * Willingness to take ownership, innovate, and proactively seek opportunities to drive impact beyond immediate tasks.
 * Strong focus on delivering solutions that align with business goals and address real-world challenges effectively.
 * Commitment to delivering exceptional user experiences by prioritizing customer needs and feedback throughout the development process.
 * Demonstrate enthusiasm, resilience, and a can-do approach to tackling challenges and driving success.

 * Proficiency in Swift (iOS) and Kotlin (Android).
 * Familiarity with containerized backend environments using Docker.
 * Strong problem-solving and debugging skills.
 * Knowledge of cross-platform optimization techniques.

## Description

We are seeking an experienced Mobile App Engineer to develop and optimize our customer-facing mobile application and web portal as part of our in-house Charge Point Management System (CPMS). Reporting into the Engineering Team Lead of the Driver squad, this role will be responsible for enhancing the iOS and Android apps, which are 70% production-ready, to achieve feature parity with the incumbent SaaS solution. Following the migration, the focus will shift to building innovative features and capabilities to deliver a market-leading experience for both Android and iOS users., + Develop and maintain high-quality native mobile applications for iOS and Android using Swift and Kotlin.

 * Performance Optimization:
 + Optimize mobile apps for speed, memory usage, and battery efficiency.
 * API Integration:
 + Work with REST/GraphQL APIs developed in FastAPI for real-time data synchronization.
 * Collaboration & Feedback:
 + Collaborate with cross-functional teams to align app features with CPMS functionalities.
 * Testing & Debugging:
 + Write and maintain automated tests to ensure application stability and quality.