Walter Holohan
CTO at Runna
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolWalter Holohan is a CTO and founder with a decade of hands-on full‑stack experience building mobile-first products and teams across fintech and consumer apps. Since 2021 he’s been leading Runna to help people train better, drawing on prior roles delivering digital banking apps and replatforming sportsbook products for organisations like Nationwide, Sportsbet and 11:FS. He combines deep React Native and Node.js expertise with practical DevOps and CI/CD experience, having built microservices, automated test suites and security pipelines in production. An engineer-turned-leader, he still contributes to open-source mobile tooling—improving Apple Watch <> React Native file transfer handling—and mentors teams to ship reliable cross-platform iOS/Android and web experiences.
10 years of coding experience
10 years of employment as a software developer
Leaving Certificate, Leaving Certificate at St Kierans College KilkennyMaster of Engineering (ME) Electronic and Computer Engineering, Master of Engineering (ME) Electronic and Computer Engineering at University College DublinStudy Abroad Program Electronic Engineering, Study Abroad Program Electronic Engineering at The University of Connecticut
Stackoverflow
1reputation
0reached
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Github Skills (10)
eventsource10
watchkit10
eventing10
file-transfer10
ios10
react-native10
event-emitter10
event-sourcing10
javascript9
react-native-component9
Programming languages (15)
Github contributions (5)
watch-connectivity/react-native-watch-connectivity
Jun 2022 - Sep 2022
Enable communication between apple watch app and react native
Role in this project:
Mobile Developer
Mobile DeveloperContributions:11 reviews, 5 commits, 3 PRs in 3 months
Contributions summary:Walter primarily worked on implementing features related to file transfer and event handling within the React Native Watch Connectivity library. They added new event listeners, such as file-received and error events. Furthermore, the user made changes to both the iOS native code and the Javascript, adding file queue management and fixing the path where received files should be saved. Their contributions improved the handling of file transfers between Apple Watch and React Native applications.
apple-watchreact-nativeiwatchreact
walterholohan/react-native-crisp-chat-sdk
May 2020 - Jun 2022
React-Native bridge for Crisp Chat iOS and Android SDK's
Contributions:17 releases, 5 reviews, 55 commits in 2 years 1 month
androidiosreact-native-bridge
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