Mobile App Developer 3 in Grimsby, United Kingdom

Putting the ‘i’ into British Innovation.

Putting the ‘i’ into Inventing the Future.

Putting the ‘i’ into Inspiring Change.

myenergi is a growing global clean‑tech manufacturer dedicated to removing the barriers to a greener future. Known for our award‑winning zappi EV charger and our intelligent home energy management ecosystem, we empower customers to control, store, and optimise their self‑generated energy.

With an expanding international presence and ambitious plans for continued global growth, we’re shaping the future of smart, flexible homes, leading innovation in solar, EV, and battery technology to create a cleaner, more sustainable future for all.

⚡️Role Summary:

We’re looking for a Senior React Native Software Engineer to join our growing mobile team. You’ll help develop and maintain two key mobile apps:

• A customer-facing app that gives users real-time visibility and control over their myenergi devices (zappi, eddi, libbi, harvi, etc.).

• An installer-focused app used by professional installers to connect to our devices via Bluetooth for setup, configuration, and diagnostics.

You’ll work as part of a small, agile team with real ownership over product features and UX improvements. This is an opportunity to work on meaningful software that integrates closely with custom hardware and contributes to a more sustainable future.

⚡️Key Responsibilities:

• Build, maintain, and iterate on our two React Native mobile apps for iOS and Android.

• Help review, design and implement the architecture of our mobile apps.

• Work closely with product owners, designers, firmware engineers, and QA to deliver features from concept to release.

• Integrate with Bluetooth (BLE) APIs to support device configuration via the installer app.

• Collaborate on API integration for real-time energy data, settings management, and device control.

• Write robust, maintainable, and well-tested code.

• Identify and resolve performance bottlenecks, bugs, and UI/UX inconsistencies.

• Participate in regular code reviews and help shape best practices across the mobile team.

⚡️Required Qualifications and Experience:

• 5+ years using React Native in production apps.

• Strong skills in JavaScript and TypeScript.

• Experience building and maintaining cross-platform mobile apps (iOS and Android).

• Familiarity with Bluetooth Low Energy (BLE) integrations in React Native (or willingness to learn).

• Experience integrating RESTful APIs and handling asynchronous data flows.

• Version control with Git and familiarity with standard CI/CD processes (e.g. CircleCI).

• Experience delivering clean UI’s and user experience best practices.

• Good communication skills and a collaborative mindset.

⚡️Nice to Have:
• Experience working with native modules (Swift, Kotlin).

• Familiarity with BLE libraries.

• Testing tools like Jest.

• Previous experience in IoT, smart home, or hardware-connected apps.

• Understanding of energy systems or EV charging tech.

Our Values:

At myenergi, our values guide how we work every day

⚡Bold – Push for better

• Challenge the norm and set new standards

• Try new ideas and learn fast

• Focus on progress, not perfection

• Speak up, even when it's hard

Empowered – Own the outcome

• Take responsibility for your work and results

• Make informed decisions

• Welcome challenge and give it respectfully

• Put customers first

United – Work as one

• Collaborate and share openly

• Communicate clearly and honestly

• Support each other

• Think beyond your own team

Purposeful – Do work that matters

• Consider the impact of your decisions

• Help customers save money and cut carbon

• Build technology that is made to last

• Deliver value through continuous improvement

What myenergi Offers You⚡️

Free on‑site EV charging

Private Medical Insurance

Cycle to Work Scheme

25 days’ holiday (increasing with service) + Bank Holidays

Mental Health First Aiders across the business

Career development and ongoing support

Employee empowerment and autonomy

️ Free on‑site parking

A positive, purpose‑driven working environment

EV salary sacrifice scheme

Birthday leave – because everyone deserves a day off for their birthday

️ Life Assurance - death in service

Long service awards

Enhanced maternity and paternity pay

Life Celebrations – vouchers for birth and marriage

Employee Assistance Programme – a free, 24/7 UK‑based counselling helpline

myenergi is committed to being an equal opportunity, diverse and inclusive employer. We want a supportive and inclusive environment where our colleagues can reach their full potential without prejudice and discrimination. We are committed to a culture where respect and understanding is fostered, and the diversity of people’s backgrounds and circumstances will be positively valued.