giginet - Portfolio

About

Mobile DevOps Engineer at LY Corporation, working on build system improvements and developer experience for large-scale iOS applications. Leveraging deep expertise in the Swift compiler and build system, I develop OSS tools and speak at conferences.

Swift Build System Developer Tooling Mobile DevOps AI × Dev Tools Game Development

Career

Work Experience

2022/07 – Present

LY Corporation (ex-LINE Corporation) Mobile DevOps Engineer, Developer Experience Team

2015/04 – 2022/07

Cookpad Inc. Mobile Application Engineer

Technical Advisor

2022/08 – Present

Ubiregi Inc.

2021/03 – 2024/12

Money Forward, Inc.

2020/03 – 2023/07

taskey Inc.

Education

2015/03

Hokkaido University, Graduate School M.S. in Complex Systems Engineering

Open Source Projects

Scipio

A build tool that generates pre-built XCFrameworks from Swift Packages. Dramatically reduces build times for large-scale apps.

Swift Build Tool

Crossroad

A type-safe Custom URL Scheme routing library for iOS apps.

Swift iOS

xcprofiler

CLI tool for profiling Swift compilation times. Helps identify build bottlenecks.

Ruby Profiling

swift-testing-revolutionary

Automated migration tool that converts XCTestCase to swift-testing.

Swift Testing

Toybox

Manage and create Xcode Playgrounds from the command line.

Swift CLI

NESEmulator-watchOS

NES (Famicom) emulator running on Apple Watch. Presented at try! Swift Tokyo 2017.

Swift watchOS

xcodeproj-mcp-server

MCP Server for manipulating Xcode projects from AI Agents.

Swift AI MCP

Peafowl

Japanese Mahjong hand evaluation library written in Swift.

Swift Game

Maintainer / Contributor

fastlane

The easiest way to automate building and releasing your iOS and Android apps. Core contributor.

Ruby CI/CD

Carthage

A simple, decentralized dependency manager for Cocoa. Maintainer.

Swift Package Manager

XcodeGen

A command line tool that generates Xcode project files from a spec file. Core contributor.

Swift Xcode

Published Apps

PokeBox

ポケモンチャンピオンズ公式対応のパーティ管理ツール。構築の保存・調整・iCloud同期に対応。

VOXCHRONICLE

行動と音楽がシンクロする新感覚リズムRPG。Apple Vision Pro にも対応。

Conference Talks

2026

try! Swift Tokyo 2026 🀄️ on swiftc 🎥 Video

Findy dotfiles Event 15 Years of Dotfiles: Dev Trends from 2011 to 2026 🎥 Video

Claude Code Meetup Japan #3 Building a Claude Code Logging Infrastructure

Development with Agents Meetup #1 Building a Claude Code Foundation for LINE App Development

2025

iOSDC Japan 2025 Swift Build Bullet Tour — The New Ecosystem Built by Swift Build 🎥 Video

Kotlin Fest 2025 Inside of Swift Export — A New Bridge Between Kotlin and Swift 🎥 Video

HAKATA.swift #1 Building an MCP Server in Swift 🎥 Video

Okinawa.swift Embedded Swift + Playdate: Game Development on Embedded Devices

2024

iOSDC Japan 2024 Achieving Faster App Launch with Mergeable Library 🎥 Video

KWDC24 (Korea) Creating Intuitive Developer Tool in Swift 🎥 Video

Swift Lovers Spinoff WWDC24 Explicitly Built Modules in 5 Minutes

try! Swift Tokyo 2024 Open Source Swift Workshop

2023

iOSDC Japan 2023 Caching Strategies for Large Dependency Graphs in Swift Packages 🎥 Video

Tokyo iOS Meetup 2023 Deep Dive into Mergeable Library

swiftc Conf Go beyond the Actor Boundary — Concurrency Migration for Swift 6

2022

Mobile DevOps Summit 2022 Standardizing Build System Using Modern Swift Packages in LINE 🎥 Video

potatotips #80 iOS 16 Bullet Tour — Learn Through Pokémon

potatotips #81 Introducing Scipio: A New Build Tool

Waiwai swiftc #31 Waiwai DocC

2021

iOSDC Japan 2021 Multi-Module Architecture in Practice for Large-Scale Apps 🎥 Video

iOSDC Japan 2021 Practical Swift Concurrency You Can Use Today

iPhone Dev Sapporo Crossroad — The Technology Behind Custom URL Scheme Routing 2021

2020

Cookpad Tech Kitchen #25 Unifying Mobile App Analytics Logging Infrastructure

try! Swift Tokyo 2020 Meetup XcodeGen Primer

2019

iOSDC Japan 2019 Game Boy Development in the Reiwa Era

iOS Test Nights #10 Azure Pipeline

Cookpad Spring Internship 2019 Swift Compiler Workshop

Cookpad TechConf 2019 Destruction, Creation, and the Future of the Cookpad iOS App

2018

try! Swift Tokyo 2018 👾 🎥 Video

iOSDC Japan 2018 Fastfile In-Depth

iOSDC Reject Conference 2018 Fastest Trip to App Store Connect

Hakata Swift AWS Lambda Swift Runtime

swiftc #5 Waiwai Operator / Waiwai Swift Package Manager

potatotips #53 The Technology Behind Custom URL Schemes

2017

iOSDC Japan 2017 fastlane Contributor AMA 🎥 Video

try! Swift Tokyo 2017 👾&⌚️

#oi_study CONTRIBUTING TO SWIFT

#otemachi_swift #1 More Swift App Startup Time

fastlane Meetup Vol.2 Contributing to fastlane

fastlane Meetup Japan Automatic Release in Cookpad

2016

iOS Test Night #1 Deploying UI Library on Travis CI

potatotips #34 Useful Command Line Tools in Swift 3

Cookpad Tech Kitchen Vol.2 CDC Testing on iOS

PyConJP 2016 Introduction to Develop Django Plugin

2015

iOS 9 Bootcamp Building Games on watchOS 2

2014

TECHMIX HOKKAIDO 2014 Sustainable Indie Game Development — Anti-patterns and Solutions

OSC Hokkaido 2014 Kawaz: Sapporo Game Creators Community

2013

Community Meetup Getting Started with Game Development: cocos2d-x 3.0 + C++11

2011

Hatena Internship 2011 Workshop Presentation

Community Meetup Introduction to iPhone Game Development with cocos2d

Python Sapporo 3.0 Introduction to PyGame

TDDBC Sapporo 2.1 Learning TDD with Yaruo

Available for Technical Advisory