RubyWorld Conference 2025 Speakers Announced

We are pleased to announce the speakers for RubyWorld Conference 2025. We sincerely thank you for the many outstanding submissions we received from around the world this year. After careful consideration, we have selected 13 speakers.

Please look forward to valuable presentations at this year’s conference.

The detailed program, including the timetable, will be published on our website at a later date.

The speakers and their presentation titles are listed below in alphabetical order.

Speaker Title
ESM, Inc.
Engineering Manager
Koichi Ito
Ruby x LLM Ecosystem
RIZAP TECHNOLOGIES,Inc.
Tomohiro Umeda
The Key to Growing Ruby Engineers for DX — Exploring the Training Know-How for Building a Development Team with Over 90% New Graduates
ANDPAD Inc.
Yoh Osaki
Mastering Scalable Organizations with Modular Monoliths
TIS Inc.
Asami Kawakami
Section Chief
Nobuya Hayashi
Ruby Enables Business Continuity Management
freee K.K.
Hayao Kimura
Exploring the World of Electronic Engineering with PicoRuby
SmartBank, Inc.
Engineering Manager
Miyuki Koshiba
Tangible Code: Understanding Code Through Touch and Real-time Visuals with Ruby
Bloomo Securities, Inc.
Director & CTO
Satoshi Kobayashi
Building a Securities System from Scratch with Ruby and Go: What Went Well, What Was Hard, and the Lessons Learned
ninja-testing.com
Masatoshi Seki
Miwa Fukaya
Recommended Test Suite Extraction Algorithm
5xRuby Co., Ltd.
CEO
Mu-Fan Teng
Parsing Taiwanese Like Code: Three-Stage Analysis of Pe̍h-ōe-jī Romanization with Ruby
ANDPAD Inc.
Hitoshi Hasumi
Why Now Is the Right Time for PicoRuby
Willnet, Inc.
Representative Director, President
Shinichi Maeshima
SmartHR, Inc.
Yasuhiro Kinoshita
Utilizing the Metaprogramming Challenges in Ruby
MEDLEY, Inc.
Division Manager, Dental Clinic Division
Toshio Maki
Ruby Powering Dental DX - Development Case Study of "Dentis" Dental Management System
TOKYO GAS i NET CORP.
Maika Yamaguchi
Use of Ruby in Tokyo Gas Group’s Earthquake Disaster Prevention Systems