Sébastien Duperron is an experienced iOS-focused software engineer with 11 years building robust tooling and automation for Swift projects. He contributes to high-profile open-source projects like SwiftGen, Sourcery and fastlane, improving code generation, template processing and build/release automation to reduce boilerplate and harden CI workflows. Practically-minded, he blends mobile development with backend and test automation skills—adding linker fixes, rsync repairs, path-resolution robustness and comprehensive test coverage. Based in France, he’s an independent engineer who quietly surfaces subtle build and template edge-cases that save teams hours of debugging and keep complex Swift toolchains reliable.
Meta-programming for Swift, stop writing boilerplate code.
Role in this project:
Full-stack Developer
Contributions:6 releases, 63 commits, 41 PRs in 2 years 2 months
Contributions summary:Sébastien primarily contributed to the Swift code generation project, focusing on improving the template processing and build system. Their work included fixing template parsing errors and adding support for features like includes. They also addressed build issues related to the Swift template compilation process, by adding linker options and fixing rsync calls. Furthermore, the user made bug fixes related to nested types auto-inline generation, adding documentation for variables and methods.
Stub your network requests easily! Test your apps with fake network data and custom response time, response code and headers!
Role in this project:
Mobile Developer (iOS)
Contributions:2 reviews, 32 commits, 10 PRs in 10 months
Contributions summary:Sébastien primarily focused on updating and maintaining dependencies within the iOS project. They addressed Swift and Xcode version compatibility issues by modifying test code and build configurations. Their contributions included fixing compiler warnings, adjusting code to align with updated Swift versions, and adding preconditions to matchers.
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