Mobile App Engineer

Believ; Greater London; On-site; GBP 70,000 - 90,000; Full time

Benefits offered by this job

25 days annual leave

Wellbeing benefits

Medical insurance

Pension contribution

Car benefit scheme

Learning platform access

Dental insurance

Critical illness cover

Job summary

Believ is seeking an experienced Mobile App Engineer to enhance its customer-facing iOS and Android apps and the CPMS portal. You’ll contribute to feature parity with the incumbent SaaS solution, then drive innovative capabilities for a market-leading experience on both platforms.

Based in Southwark, the role is office-based with a focus on delivering high-quality, scalable mobile experiences and robust integrations with real-time data.

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.
• Knowledge of Agile development processes and version control tools like Git.

Responsibilities

• Develop and maintain high-quality native mobile applications for iOS and Android using Swift and Kotlin.
• Optimize mobile apps for speed, memory usage, and battery efficiency.
• Work with REST/GraphQL APIs developed in FastAPI for real-time data synchronization.
• Collaborate with cross-functional teams to align app features with CPMS functionalities.
• Write and maintain automated tests to ensure application stability and quality.

Skills

Swift (iOS)

Kotlin (Android)

Performance profiling

Debugging

API integration

REST/GraphQL

Agile

Git

Tools

Docker

Git

FastAPI

Job description

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 optimise 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.

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.
• 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).
• Familiarity with containerised backend environments using Docker.
• Strong problem solving and debugging skills.
• Knowledge of cross-platform optimisation techniques.

Benefits

• Competitive basic salary
• 25 days annual leave, plus 8 Bank Holiday days
• Access to wellbeing and mental health benefits such as the Calm app, personal medical insurance, critical illness cover and dental insurance
• Pension contribution
• Access to our car benefit scheme
• Access to our online learning platform to continue to develop and grow your career with us.

Interview process

• Initial briefing with our recruiter
• Initial screening online
• Technical assessment and meeting the broader team in the office in Southwark
• Final stage online

Location

The business is currently based in our offices in Southwark. The position is full time and office based.

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.

If you don’t meet every requirement but are excited by the role, we’d still love to hear from you.

#Believ