Mobile App Developer

Liberty Global; Greater London; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

A leading charge point operator based in Greater London is looking for an experienced Mobile App Engineer to develop and optimize customer-facing applications. This role involves enhancing the existing app and web portal for both iOS and Android platforms while focusing on performance optimization and API integration. The ideal candidate should be proficient in Swift and Kotlin, and have a strong background in mobile app development. Additional benefits include a competitive salary, generous leave policy, and wellness programs.

Benefits

Competitive salary and bonus scheme

25 days annual leave plus bank holidays

Wellbeing and mental health benefits

Pension contribution matched up to 10%

Car benefit scheme and cycle to work scheme

Online learning platform

24 hours Volunteer Time Off

Virgin Media/O2 discounts

Access to VIP Arena Suites

Enhanced parental leave policies

Qualifications

• 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.

Responsibilities

• Develop and maintain high-quality native mobile applications for iOS and Android.
• Optimize mobile apps for speed, memory usage, and battery efficiency.
• Work with REST/GraphQL APIs for real-time data synchronization.

Skills

Native Mobile Development

Performance Optimization

API Integration

Collaboration & Feedback

Testing & Debugging

Tools

Swift

Kotlin

FastAPI

Git

Docker

Job description

Overview

Believ: ABOUT US

At Believ, formerly known as Liberty Charge, we believe sustainable transport should be accessible to everyone. We’re a Charge Point Operator (CPO) on a mission to create the UK’s most reliable electric vehicle charging network that doesn’t cost the earth and leaves no one behind.

We work closely with local authorities and businesses to deliver reliable, high quality charging networks at pace, at scale and at zero cost.

We offer all the advantages of being a scale-up business, but with the added security and long-term backing from well-known parents - Liberty Global (who also own our delivery partner, Virgin Media O2) and Zouk Capital (who manage the Government’s Charging Investment Infrastructure Fund).

You’ll be joining this exciting journey at the start of our scale-up phase, and work with us to hit the ambitious targets our shareholders have set. You’ll become part of a passionate and supportive team in a fast-paced, dynamic and result-driven environment.

About the role

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 Head of Engineering, this role will be responsible for enhancing the app and web portal, 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

Key responsibilities

• Native Mobile Development: 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, including the integration of OCPP/OCPI protocols.
• Testing & Debugging: Write and maintain automated tests to ensure application stability and quality.

About you

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:

Knowledge & Experience

• 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.

Engineering Mindset

• 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.

Skills & Abilities

• Proficiency in Swift (iOS) and Kotlin (Android).
• Strong experience in API integration and backend technologies like Python and FastAPI.
• Familiarity with containerized backend environments using Docker.
• Strong problem-solving and debugging skills.
• Knowledge of cross-platform optimization techniques.

Benefits

• Competitive salary and bonus scheme
• 25 days’ annual leave, plus the usual 8 UK Bank Holidays and the option to purchase up to 5 additional days per year*
• Access to wellbeing and mental health benefits such as the Calm app, personal medical insurance, critical illness cover, dental, optical & travel insurance, income protection and life assurance
• Pension contribution matched up to 10%
• Access to our car benefit scheme and cycle to work scheme
• Access to our online learning platform to continue to develop and grow your career with us.
• 24 hours a year Volunteer Time Off to support causes that are important to you
• Virgin Media / O2 discounts and offers
• Access to VIP Arena Suites at the O2 Arena (London) and First Direct Arena (Leeds)
• Enhanced parental leave policies

* This perk can only be availed for the following calendar year by employees who started before 1st December

Location

The business is currently based in our office in Southwark. The position is full time, hybrid with 3 days (Tuesday, Wednesday & Thursday) based in the office. Believ is an equal opportunity employer. We embrace diversity and are committed to creating an inclusive environment for our people.

We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.