Senior Mobile Developer

Location: Lower Eashing, United Kingdom

Department: Product Development

Job Purpose

As we continue to expand our market share in the rapidly emerging Employee Experience platform category, we are looking for a Senior Mobile Developer to help rebuild our market-leading Employee Experience App and play a key role in an exciting new phase of development.

Main Responsibilities

In this role, you will lead the design, development, and maintenance of our cross-platform mobile app using React Native. You will integrate the app with our backend product through RESTful and GraphQL APIs, ensuring seamless functionality and performance. Writing clean, well-documented, and testable code (unit and integration tests) will be central to your work. Additionally, you will stay ahead of emerging technologies and mobile development trends, particularly within the fast-moving React Native ecosystem, to keep our app innovative and competitive.

Requirements

• At least 5 years’ professional experience building mobile apps, including at least 3 years’ with React Native.
• Experience building apps using Expo and EAS.
• Proficiency in JavaScript and Typescript.
• Understanding of performance optimization and profiling techniques.
• Understanding of React Native ecosystem, common libraries, patterns and practices.
• Strong knowledge of React fundamentals (hooks, context, lifecycle etc).
• Complete understanding of build and distribution processes for iOS and Android.
• Expertise in unit testing and E2E testing of mobile apps.
• Understanding of how AI can be used to improve developer productivity, along with the benefits and risks involved.
• Knowledge of mobile security risks and development best practices.
• Ability to diagnose functional and non-functional issues, including crashes.
• Excellent communication and collaboration skills.
• Passion for mobile app development underpinned by intellectual curiosity.

Desirable

• Portfolio of relevant projects or contributions.
• Understanding of building and diagnosing web applications.
• Familiarity with using Swift/Kotlin to create native modules.
• Experience with branding/white labelling apps.
• Knowledge of OAuth and integrating with Identity Providers.
• Experience with Enterprise mobile solutions such as Intune MAM.

Why Work For Unily? 

In addition to a generous base salary and discretionary company bonus, here are some things we think you will love: 

Our awesome team culture. We are focused on achieving results as a team and having fun while we do it. You won’t find a friendlier or more dedicated bunch of people. 

Our industry leading product. We are very proud of our ever-evolving product, naturally we use (and love) it internally and provide the tools and resources for you (and our clients) to become a Unily expert. 

The flexibility that we offer. We don’t just mean working from home occasionally. We operate on a hybrid basis, and also recognize that life happens during the 9-5.30 and encourage a sustainable work/life balance. 

Our bright and modern office spaces. When you need to be in the office we want it to be like being at home. We have a well-stocked kitchen and the option to bring your dog to work. 

We offer a fantastic suite of benefits. Including 25 days holiday plus an extra paid day off to enjoy your birthday, Vitality life cover (for health, sight, hearing and dental), Aviva pension (via a salary sacrifice scheme), life assurance, income protection and so many more. 

Our commitment to sustainability and giving back to the community. We know working for an organisation that takes its environmental & social impact seriously is important, and we are proud to offer 1 fully paid volunteering day per year, an employee matching charity donation scheme and options to lease an Electric Vehicle through our salary sacrifice scheme. 

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About the Company

About Unily

Unily partners with the world’s largest and most complex enterprises to power Organizational Velocity through digital Employee Experience transformation. Iconic brands, including Estée Lauder Companies, CVS Health, and British Airways, use Unily’s market-leading Employee Experience platform to improve productivity, streamline communication, and foster a highly connected workplace.

Unily is the only triple leader recognized by all three of the major analysts. Unily is recognized as a Leader in the 2025 Gartner® Magic Quadrant™ for Intranet Packaged Solutions, the 2024 Forrester Wave™: Intranet Platforms, and the IDC MarketScape: Worldwide Experience-Centric Intelligent Digital Workspaces 2025. With these accolades, we continue to grow and expand our employee community with people who are passionate about joining us on this exciting journey.