Mobile App Engineer

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 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 containerized backend environments using Docker. Strong problem-solving and debugging skills. Knowledge of cross-platform optimization 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.

Equal Opportunity

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’s meet every requirement but are excited by the role, we’d still love to hear from you. #Believ At Believ, we’re on a mission to accelerate the transition to electric vehicles by delivering reliable, accessible, and future-ready charging infrastructure. Backed by a proven track record and a commitment to sustainability, our team combines deep industry expertise with innovative technology to build solutions that support communities, businesses, and local authorities across the UK. We partner closely with stakeholders to design and operate EV charging networks at scale—helping to remove barriers to adoption, simplify operations, and enable a cleaner, more connected future. Through collaboration, innovation, and customer focus, we empower our partners to stay ahead in a rapidly evolving market and play a vital role in the journey to net zero.

Privacy Policy

The data included in the candidate account (eg. your name, e-mail address and CV; hereafter collectively "your data") will be processed by Believ as the Controller for the purposes of candidate selection, placement and employment. Your data can also be shared with Believ plc and/or its majority owned subsidiaries (collectively, the "Believ", "we" or "us") and third party organizations providing recruitment, selection, placement and employment services. Such third parties will use candidate information only in connection with such services, and applicable law. Your data will be retained for the period of up to 1 year after closing the selection process, after which it will be deleted. You have: the right to access your data or ask for a copy of the personal data that we hold about you and, if such personal data is inaccurate or incomplete, to request the rectification, erasure or blocking of such personal data. You have the right to object to the processing; and the right to lodge a complaint at a supervisory authority or a court of law in accordance with applicable laws. If you wish to exercise your privacy rights or if you have any questions about our use of your data or about your privacy rights please contact:

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