Joseph Duffy
IOS Lead at Yetii Ltd.
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolJoseph Duffy is an iOS lead and founder with 13 years of experience building mobile and web products from startup to scale, currently leading iOS development at Sporty Group while running his own app studio, Yetii Ltd. He combines hands-on Swift engineering with team leadership and mentoring, having shipped apps across agencies and in-house teams since 2014. An active contributor to open-source tooling, he improved SwiftLint integration in the widely used danger/swift project to handle shell environments and CI edge cases. Based in London, he pairs a First-class BSc in Software Development with practical expertise in automation, build scripting, and developer ergonomics—often solving subtle environment and tooling issues that break builds.
13 years of coding experience
6 years of employment as a software developer
Software Development BSc(Hons), Computer Software Engineering, First, Software Development BSc(Hons), Computer Software Engineering, First at The University of HuddersfieldSouth Hunsley SchoolSouth Hunsley Sixth Form College
English, Spanish
Stackoverflow
4,666reputation
546kreached
45answers
64questions
ios
top-5%
swift
top-5%
Github Skills (21)
swiftlint10
automation10
swift10
automations10
scripting9
testing9
xctest9
ios9
uitest9
shell9
script9
sh9
githubaction-workflow8
github-ci8
appstore6
Programming languages (14)
Github contributions (5)
danger/swift
Mar 2019 - Jun 2019
⚠️ Stop saying "you forgot to …" in code review
Role in this project:
Automation Engineer & Swift Developer
Automation Engineer & Swift DeveloperContributions:20 commits, 3 PRs, 3 pushes in 3 months
Contributions summary:Joseph primarily focused on improving the SwiftLint integration within the `danger/swift` repository, which is a tool to stop "you forgot to..." in code review. Their work involved updating the SwiftLint plugin to correctly handle environment variables, specifically when the system shell is fish. They addressed issues related to file path handling and quoting within the SwiftLint execution, alongside refactoring code and fixing SwiftLint warnings. They also modified the build script to prevent homebrew tap creation for forks, and added support for GitHub bot users.
JosephDuffy/XbICalendar
Dec 2015 - Mar 2019
Contributions:2 releases, 3 pushes, 2 tags in 3 years 4 months
c-wrapperobjective-cios
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