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January 22, 2026 libgd-gis, satellite imagery, and a new way to think about maps Most mapping libraries start from the same place: roads, labels, vectors, tiles. But what happens if the map itself is not the goal? What if the map is just a lens to observe the planet? This article is about how libgd-gis, … Continue reading A New View of Earth, Powered by Ruby
Senior Ruby Engineer · Open-Source Author (ruby-libgd, libgd-gis) · FinTech & GIS January 20, 2026 In modern development teams, Proofs of Concept (PoC) are everywhere. They usually start as Jupyter notebooks: quick experiments, charts, metrics, comparisons, and visual insights. They work well for exploration — but too often, they stop there. The knowledge stays locked … Continue reading Running Notebooks the Ruby Way: From PoC to Production with RubyPyMill
How RIZAP Technologies Turns Junior Developers Into Senior Ruby Engineers December 29, 2025 At RubyWorld Conference 2025 and Kaigi on Rails 2025, a talk by Tomohiro Umeda from RIZAP Technologies quietly delivered one of the most important messages for the future of Ruby engineering. Most companies would love to hire senior engineers. But in reality … Continue reading How RIZAP Technologies Turns Junior Developers Into Senior Ruby Engineers
Ruby at the Front Line of Disaster Prevention December 26, 2025 How Tokyo Gas Uses Ruby to Protect Millions of People During Earthquakes Based on the RubyWorld Conference 2025 presentation by Maika Yamaguchi, Tokyo Gas i-Net Corp. When we think about Ruby in production, we usually imagine web platforms, SaaS products, or developer tools. But … Continue reading Ruby at the Front Line of Disaster Prevention
December 18, 2025 Running PicoRuby on an ESP32 is absolutely possible — but today it is not straightforward, and most guides omit critical details. This article consolidates everything that actually matters, based on real-world setup, debugging, and integration with ESP-IDF 5.5. If you follow this guide exactly, you will end with: PicoRuby running on an … Continue reading A Definitive Guide to Running PicoRuby on ESP32 (ESP-IDF 5.x)
December 17, 2025 Metaprogramming has always been one of Ruby’s most powerful — and most intimidating — features. While the book Metaprogramming Ruby by Paolo Perrotta is widely regarded as a classic, many developers share the same experience: it’s brilliant, but hard to truly internalize by just reading it. In a talk presented at RubyWorld … Continue reading From Reading to Mastery: Turning Metaprogramming Ruby into a Hands-On Learning Platform
December 15, 2025 Lessons from Ruby World Conference 2025 At Ruby World Conference 2025, Masatoshi Seki (関 将俊) and Miwa Fukaya (深谷 美和) presented a talk grounded in something rare in our industry: more than 20 years of real testing history. Their presentation, “How to Create Today’s Recommended Tests”, introduces Ninja Testing — a testing … Continue reading Smart Test Suites with Ruby
Building LLM-Powered Applications in Ruby: A Practical Introduction December 12, 2025 (Based on Koichi Ito’s “Ruby × LLM Ecosystem” presentation at Ruby World Conference 2025)** Large Language Models (LLMs) have rapidly evolved from experimental chatbots to foundational components of modern software. They now augment workflows in customer support, content generation, data analysis, and even development … Continue reading Building LLM-Powered Applications in Ruby: A Practical Introduction
December 10, 2025 Based on the presentation script from RubyWorld Conference 2025 This article is based on the script of the presentation “Why Now Is the Right Time for PicoRuby”, delivered by Hitoshi Hasumi (ANDPAD Inc.) at RubyWorld Conference 2025. The original session was a 30-minute conference talk, and this text adapts its core ideas, … Continue reading Why Now Is the Right Time for PicoRuby
December 9, 2025 A curated list of tools that accelerate development and keep your codebase clean One of the most underrated strengths of Ruby on Rails is its generator ecosystem. Beyond the native Rails generators, many gems ship with their own commands to scaffold authentication, background jobs, pagination, translations, slugs, geolocation, and much more. These … Continue reading 🧰 Ruby Gems With Powerful Generators You Should Be Using in Your Rails Projects
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