Shin Miyagi
Software Engineering Manager SIM IoT at ソフトバンク
Kawasaki, Japan
Summary
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RockstarShin Miyagi is a seasoned software engineering manager at SoftBank with over 25 years in telecommunications, specializing in SIM technologies and IoT security. He led device testing and global program coordination from early GSM phones to today’s pSIM, eSIM and iSIM standards, acting as the primary interface to device manufacturers. Over the past 15 years he has driven SIM specification work and, since 2018, steered security-focused IoT device development, blending standards expertise with hands-on engineering. An active open-source contributor, he has shipped parser and language fixes to the Ruby core and improved tooling across projects like rbs, slim-rails and xremap, showing deep systems and backend competence. Comfortable operating across Japan and European field trials, he pairs practical field experience with protocol-level design insight. Colleagues rely on him for bridging device vendors, carrier requirements and developer-facing tooling to deliver secure, interoperable mobile solutions.
15 years of coding experience
Stackoverflow
101reputation
0reached
0answers
0questions
Github Skills (31)
parserator10
ruby-rails10
debug10
parser10
type-check10
testing10
linux10
rails10
object-oriented-programming10
c1110
interpreter10
ruby10
c1710
type-system10
j10
Programming languages (19)
Github contributions (5)
ruby/rbs
Oct 2019 - Jun 2020
Type Signature for Ruby
Role in this project:
Back-end Developer / Compiler Engineer
Back-end Developer / Compiler EngineerContributions:437 commits, 62 PRs, 25 comments in 8 months
Contributions summary:Shin primarily contributed to the `rbs` repository, which involves type signatures for Ruby. The commits focused on fixing warnings, updating type definitions, and improving type checking within the Ruby type system. They also worked on improving the handling of tuples, adding support for array type checks, and creating test cases for new features. The user's work impacted the core functionality and reliability of the type system.
railssignaturerubytype-checking
yasslab/railsguides.jp
May 2015 - Feb 2018
📕 Ruby on Railsガイドの公開リポジトリです。1600ページ超えの大型リファレンスとなっています。
Role in this project:Technical Writer
Technical WriterContributions:121 commits, 24 PRs, 33 pushes in 2 years 9 months
Contributions summary:Shin primarily contributed to the documentation of the Ruby on Rails guides repository. They added the ability to translate the guide's documents.yaml file, made changes to the file paths for translations, and regenerated the Japanese HTML output. The user also fixed a dead link and made minor improvements to the sitemap generation and formatting.
ruby-on-railsrailsjapaneserubyruby-on
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