Senior Software Engineer (React/React Native)

Addooco is a managed IT, cloud, and communications solutions provider specializing in enterprise-grade services for businesses of all sizes. Established in 2008, the company operates across the United Kingdom region and beyond, focusing on proactive management and in-house developed solutions delivered through their own datacenter infrastructure.

Summary

We are seeking a highly skilled Senior Software Engineer specialising in React and React Native to join our dynamic team. In this role, you will contribute to designing and developing innovative software solutions that support our clients’ needs and align with our mission to deliver top-tier IT services.

Required skills & experience

Essential:

• 5+ years professional software engineering experience
• 3+ years React experience
• 3+ years React Native experience with production iOS and Android apps
• TypeScript experience (strong typing, interfaces, generics)
• Mobile app deployment (iOS App Store, Google Play Store)
• Mobile CI/CD (Fastlane or similar)
• State management (Context API, Redux, or similar)
• RESTful API integration
• WebSocket/real-time features
• Git version control and GitHub workflows
• Jest and React Testing Library (or similar)
• Mapping libraries (TomTom, MapLibre, Mapbox, Google Maps, or similar)

Highly desirable:

• Expo experience
• Native module development (Swift, Kotlin/Java)
• Push notifications implementation (Notifee, Firebase)
• Stripe or payment SDK integration
• Geolocation and background location tracking
• Node or backend development experience (for full-stack understanding)
• Experience with Inertia.js
• Experience taking over codebases from external teams
• Previous experience in transport/logistics/dispatch systems

Responsibilities

Technical leadership:

• Act as Product Expert for all ongoing frontend applications
• Provide technical guidance and mentoring to mid-level engineers
• Review code and provide constructive feedback
• Make architectural decisions for frontend applications
• Establish coding standards and best practices for the team

Development:

• Take ownership of 3 existing systems from an external vendor during a handover period
• Develop new features across web and mobile applications
• Maintain and improve existing functionality
• Implement mapping and geolocation features
• Integrate with existing API (RESTful + WebSocket)
• Write comprehensive automated tests (Jest, React Testing Library)

Mobile expertise:

• Manage iOS and Android app store deployments
• Handle platform-specific issues and optimisations
• Configure push notifications and background services
• Optimise mobile app performance and bundle size
• Stay current with React Native ecosystem updates

Operations:

• Participate in 24/7 on-call rotation for system downtime events
• Investigate and resolve production issues (web and mobile)
• Monitor application performance and user experience
• Coordinate mobile releases and emergency patches

Collaboration:

• Work directly with stakeholders to understand requirements
• Coordinate with Ruby on Rails and Laravel teams on API contracts
• Provide input to project planning and estimation
• Lead frontend work on company websites and other projects

Knowledge transfer:

• Build comprehensive understanding of all application during external vendor handover
• Document frontend architecture and component patterns
• Share knowledge with mid-level team members
• Prepare the team to mentor junior engineers in the future

Key Success Metrics

• Successfully complete handover from external vendor and take full ownership of 3 applications within 3 months
• Maintain high-quality user experience across web and mobile platforms
• Deliver new features while maintaining code quality (test coverage 80-100%)
• Successfully manage app store deployments
• Build effective team processes and establish technical standards
• Develop mid-level engineers' capabilities through mentoring