Ian Leitch
Borough of Rossendale, England, United Kingdom
Summary
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RockstarIan Leitch is a seasoned software engineer with 16 years’ experience focused on backend systems, tooling and value-driven technology delivery. Based in Rossendale, UK, he is an active open-source contributor in the Ruby and Swift ecosystems, with notable work on Rubinius (VM-level agent APIs), Periphery (unused-code detection for Swift) and XcodeGen. His contributions show a mix of deep runtime-level thinking—adding process and memory diagnostics to a Ruby VM—and practical developer productivity improvements like indexing refinements and test automation. Ian excels at refactoring and compatibility work, having driven migrations and updates across mature codebases to maintain correctness with evolving platforms. He combines a pragmatic engineering approach with attention to tooling and observability that helps teams ship reliably.
15 years of coding experience
English, Japanese
Github Skills (33)
data-generation10
spec10
testing10
rubinius10
virtual-machine10
migration10
ruby10
project-setup10
xcode10
new-project10
code-generation10
rubyspec10
yaml10
swift10
debug9
Programming languages (14)
Github contributions (5)
peripheryapp/periphery
Feb 2019 - Jan 2023
A tool to identify unused code in Swift projects.
Role in this project:
Backend Developer & Automation Engineer
Backend Developer & Automation EngineerContributions:72 releases, 36 reviews, 400 commits in 3 years 11 months
Contributions summary:Ian contributed primarily to the development and maintenance of the Periphery tool, specifically focusing on improving its accuracy and performance. They implemented changes to core functionality, such as modifying the indexing process by splitting syntax tree and substructure requests, and resolving conflicts introduced by Xcode updates. Additionally, they automated and improved the testing framework by adding tests for code with #if conditions, identifying edge cases, and managing the test setup.
unusedswift-projectsswiftiosmacos
rpush/rpush
Jan 2014 - Mar 2018
The push notification service for Ruby.
Role in this project:Back-end Developer
Back-end DeveloperContributions:453 commits, 26 PRs, 120 pushes in 4 years 2 months
Contributions summary:Ian's primary focus appears to be refactoring and renaming classes and methods within the Rpush project. They made several commits aimed at changing the class names and project's overall name from "Rapns" to "Rpush". Code changes indicate they worked primarily on Ruby code, modifying test files, core libraries, and code related to Android Push Notification Service (ADM) delivery. Further contributions involve adding a migration to rename all classes and tables to "Rpush", indicating a significant architectural change.
pushnotification-servicenotificationspush-notificationsubscription
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