Senior Associate - React Native Engineer

The Senior Associate - React Native Engineer is responsible for architecting, developing, and optimising world‑class mobile applications across Davies’ digital product ecosystem. As a senior technical leader within a cross‑functional Agile squad, the role designs and delivers high‑quality, high‑performance mobile experiences using React Native, TypeScript, and modern mobile engineering practices. Working closely with Product Owners, UX/UI Designers, Backend Engineers, Architects, and QA teams, the Senior React Native Engineer ensures that mobile interfaces are intuitive, scalable, secure, and aligned with the organisation’s broader engineering and design strategy. The role leads mobile technical decisions, champions engineering best practice, and contributes to evolving Davies’ approach to mobile‑first digital experience delivery. This position is ideal for a highly skilled engineer with strong mobile fundamentals, deep React Native expertise, and a passion for building mobile applications that deliver exceptional value to customers and internal users.

Key Responsibilities

Mobile Application Development

• Architect, build, and maintain high‑quality, scalable React Native applications for both iOS and Android.
• Develop robust, reusable, and maintainable UI components, screens, modules, and native integrations.
• Ensure mobile experiences are performant, responsive, accessible, and aligned with the organisation’s design system.
• Integrate mobile applications with backend APIs, microservices, event‑driven systems, and cloud‑native infrastructure.
• Write clean, secure, modular code applying SOLID, DRY, clean architecture, and secure‑by‑default principles.
• Implement advanced mobile patterns including offline support, caching, animations, gestures, native bridges, and deep linking.
• Lead discussions on mobile architecture, patterns, navigation, and platform‑specific differences.

UI/UX Collaboration

• Partner with UX/UI Designers to bring mobile wireframes, mockups, and prototypes to life with pixel‑perfect accuracy.
• Provide technical guidance on mobile design feasibility, interaction patterns, and accessibility.
• Advocate for a mobile‑first, user‑centred approach in all design and development decisions.

**Quality Engineering & Testing **

• Define and implement mobile testing strategies including unit, integration, component, and E2E testing (e.g., Jest, React Native Testing Library, Detox/Appium).
• Promote and support CI/CD automation for mobile builds, releases, and OTA updates (e.g., App Center, CodePush, Fastlane).
• Lead code reviews to enforce standards, maintainability, and quality consistency across the mobile codebase.
• Diagnose and resolve performance issues across devices, platforms, OS versions, and environments.

Agile Collaboration & Delivery

• Contribute as a senior member of Scrum or Kanban teams, shaping backlogs, defining acceptance criteria, and supporting sprint ceremonies.
• Collaborate closely with backend, QA, UX, and product functions to deliver high‑quality increments every sprint.
• Provide accurate estimations and break down complex features into actionable, manageable tasks.
• Mentor engineers across squads, supporting their growth in mobile development, testing, and architecture.

Continuous Improvement & Innovation

• Stay up to date with React Native releases, mobile ecosystem advancements, native APIs, and emerging trends.
• Proactively recommend and implement enhancements that improve performance, developer experience, security, or maintainability.
• Contribute to shared tooling, libraries, standards, and development patterns.
• Explore new mobile technologies including biometrics, secure storage, offline capabilities, device sensors, and push notification strategies.

Skills, Knowledge and Expertise

• Extensive experience developing mobile applications using React Native in production.
• Strong proficiency in JavaScript, TypeScript, and modern React/React Native patterns.
• Deep understanding of mobile architecture, native modules, navigation, gestures, animations, and platform APIs.
• Experience with iOS and Android development concepts such as app lifecycle, permissions, signing, and store submission.
• Strong experience integrating with REST APIs, backend systems, and cloud platforms.
• Proficient with CI/CD for mobile applications and OTA updates (e.g., Fastlane, CodePush, App Center). Strong experience with mobile testing frameworks including Detox, Jest, Appium, or similar.
• Experience contributing to architecture decisions, code reviews, and cross‑team technical leadership. Strong understanding of security, offline-first patterns, and performance optimisation for mobile apps.