Open to opportunities

Ronan Doyle

@ronandoyle

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Senior software engineer building high-performance cross-platform mobile apps with React Native and React.

Ireland

Message

What I'm looking for

I’m looking for a collaborative, fast-paced startup or SaaS where I can take ownership of critical mobile features, improve performance and reliability, and mentor others in an agile team.

I’m an experienced Senior Software Engineer with 11+ years across Android, iOS, and React Native development. I specialize in building cross-platform mobile applications using React Native, Expo, JavaScript/TypeScript, and Redux, with a focus on reliability, performance, and seamless UI/UX.

In my recent role, I led core app feature development using React.js and Ruby on Rails while delivering fintech-ready solutions with React Native and Expo. I used Redux for state management, integrated React Navigation for smooth flows, optimized performance by reducing load times, and supported AI-powered personalization through machine learning algorithms. I also implemented CI/CD using GitLab CI and Docker (reducing release cycles by 20%), integrated third-party APIs, improved offline storage with Redux Persist, and worked with Firebase for real-time sync.

I’ve built healthcare and iGaming experiences by addressing performance bottlenecks, improving memory management, and strengthening test coverage with Jest and React Testing Library. I enjoy mentoring junior developers, running code reviews, and taking ownership of critical features in agile teams—especially in collaborative, fast-paced startup and SaaS environments.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Bank of Hope

Mar 2023 - Present (3 years 2 months)

Led development of core fintech app features using React.js and Ruby on Rails, collaborating with design and product teams to improve user experience. Built React Native (Expo) functionality with Redux, Firebase, and offline persistence, and implemented CI/CD with GitLab CI and Docker to reduce release cycles by 20%.

React Ruby on Rails React Native Redux React Navigation Firebase Gitlab CI Docker Performance Optimization Machine Learning Algorithms

Mobile Developer

Neko Health

Aug 2018 - Feb 2023 (4 years 6 months)

Contributed to a cross-platform healthcare app using React Native for iOS and Android, owning UI delivery with pixel-perfect implementation. Optimized performance by addressing bottlenecks and improving memory management, and ensured stability with Jest and React Testing Library.

React Native Redux REST APIs Performance Optimization Memory Management Jest React Testing Library App Store Deployment

Software Developer

Zartis

Sep 2013 - Jul 2018 (4 years 10 months)

Developed native iOS applications with Swift and Objective-C, transitioning to React Native to unify cross-platform codebases. Integrated REST APIs and Core Data, and delivered responsive animations with Core Animation while reducing crashes through debugging and performance tuning.

Swift Objective C React Native REST APIs Core Data Core Animation UIKit Agile Scrum