Welcome to koborin.ai
About This Proving Ground
Section titled “About This Proving Ground”This is a personal technical proving ground where I explore, document, and share my journey through modern software development — shaped through repeated cycles of hypothesize → verify → return.
Who runs this
Section titled “Who runs this”Built by @nozomi-koborinai.
- 🏢 Serverless Application Developer at a Google Cloud Partner company in Japan
- 🏆 Google Cloud Partner Top Engineer 2025 & 2026 (Application Modernization)
- 📖 Contributing to developer communities through Genkit books, OSS, and conference talks
- 🎯 Specialized in DDD and Clean Architecture for quality assurance
- 🤖 Exploring AI-driven development — building tools like contextlint
Background
Section titled “Background”I graduated from an IT technical college in March 2019, where I built my foundation in object-oriented programming with Java.
During my first four years, I worked on enterprise legacy systems while teaching at App University (Japan’s app development engineering community) and co-authoring a book on Flutter design patterns.
Currently working across cloud architecture, pre-sales, and team leadership at a Google Cloud Partner company — while exploring AI-driven development on the side.
Book: Mastering Genkit
Section titled “Book: Mastering Genkit”
Building
Section titled “Building”
contextlint
A semantic linter for AI-era Markdown. Verifies cross-references, required sections, and dependency graphs deterministically — across your editor, AI assistants, and CI. Tagline: “markdownlint for syntax. contextlint for meaning.”
TerraDart
As the Dart ecosystem grows — Flutter on the client, more server-side Dart (Firebase Functions, Cloud Run, Cloud Run functions) — teams often still use Terraform for delivery: HCL or *.tf.json, alongside the usual GCP console workflows.
TerraDart is my pre-alpha take on type-safe IaC for that stack. Author typed GCP resources in Dart, emit standard *.tf.json, and keep your existing terraform apply pipeline.
GCP Cost MCP Server
An MCP server that lets AI assistants like Claude or Cursor estimate GCP running costs — instead of manually using the Google Cloud Pricing Calculator. Built on the Cloud Billing Catalog API with Go + Genkit. Works with conversational requirements and architecture diagrams alike. Adopted for use at the GCP partner company I work for.
Ableton OSC MCP Server
An MCP (Model Context Protocol) server that lets AI assistants like Claude or Cursor drive Ableton Live 11+ via AbletonOSC. Built in Go + Genkit. Tracks, MIDI clips, tempo, and clip slots are exposed as MCP tool calls so AI conversation can drive beat-making and music production directly.
OSS Contributions
Section titled “OSS Contributions”Genkit for Dart and Flutter
Originally co-developed the Dart client for Genkit with the Genkit team, aiming to grow the Flutter/Dart Genkit community. The project has since evolved from a client library into Genkit for Dart and Flutter — a full AI SDK with client features alongside. Now contributing as a community member.
Genkit (core)
Small contributions to the upstream Genkit repository: docs improvements and minor PRs.
Highlights
Section titled “Highlights”| Item | Description | Link |
|---|---|---|
| Google Cloud Partner Top Engineer 2025 & 2026 | Selected for Application Modernization two years in a row | - |
| Introduction to Flutter Design Patterns (co-author) | Covers layered / onion architecture | Zenn |
| App University (formerly Flutter University) | Former instructor, current 1-on-1 mentor | flutteruniv.com |
Speaking & Events
Section titled “Speaking & Events”| Date | Event | Title | Attendees |
|---|---|---|---|
| 2025/07 | Google I/O Extended Tokyo 2025 | Dart client for Genkit: Official Client for Using Genkit from Flutter | 434 |
| 2025/02 | FlutterGakkai (7th) | Accelerating Generative AI App Development with Flutter × Firebase Genkit | 191 |
| 2024/12 | Genkit Hands-on (Organizer) | Technical supporter | 45 |
| 2024/11 | GDG DevFest Tokyo 2024 | Orchestrating Firebase and AI: Genkit Architecture Example | 369 |
| 2024/06 | TECH+ Seminar | Revolutionizing Logistics with Google Maps Platform | 246 |
| 2024/06 | Map The Way Tokyo | Retail DX Strategy for Competitive Advantage | 75 |
| 2024/04 | Retail DX | Retail DX Strategy for Competitive Advantage | 138 |
| 2024/04 | Google Cloud RetailTech Recap Seminar | Integrating Google Maps, Firebase, and PaLM | 51 |
| 2024/03 | RetailTech JAPAN | Enhancing Development Efficiency with Google Maps, Firebase, and PaLM Integration | 429 |
| 2024/02 | GDG Tokyo Monthly Online Tech Talks | IaC and CI/CD Pipeline Construction in Firebase | 200 |
| 2023/12 | Cloud Ace Webinar | Rapid Development of a Healthy Review App with Firebase × Google Maps API | 61 |
Project Experience
Section titled “Project Experience”| Year | Project | Overview |
|---|---|---|
| 2026 | Cloud Modernization (On-prem Alfresco → GCP) | Tech lead & PM overseeing backend and SRE engineers. Migrating on-premises Alfresco to GCP with a platform engineering mindset — building harnesses to maximize developer experience for the team |
| 2025 | Full-scratch Business System Development | Secure architecture with Cloud Run + Cloud SQL Auth Proxy. Fully automated IaC with CDKTF. Solo full-stack TypeScript development |
| 2025 | Platform Engineering Support | Supported a project struggling with dev environment differences and Firebase Authentication implementation. Standardized dev environments for 20+ engineers using Cloud Workstations and conducted Firebase Auth best practices workshops |
| 2025 | Generative AI App Development Support (Won Competition) | Proposed Genkit and DB security architecture, winning the contract over 2 competitors. Also supported team building focused on Agentic AI coding |
| 2025 | Google Cloud Next ‘25 Live Reporting App (Award Winner) | Developed an app using Genkit for speech-to-translation-to-draft generation. Team published 23 live reports in 3 days. Received award from Google Cloud Japan |
| 2024 | Identity & Access Management Architecture | Introduced Identity Platform as IDaaS. Proposed dynamic authorization with Cloud Run sidecar + Open Policy Agent (OPA), supporting SAML auth providers |
| 2024 | Firebase Architecture Support | Implemented IP restrictions for Cloud Functions deployment via VPC Service Controls. Designed auto-documentation pipeline with Gemini Code Assist |
| 2023 | Tokyo Flutter Hackathon Winner | Participated with App University (formerly Flutter University) team. Developed real-time online game in 24 hours. Handled Firebase full-stack (Auth, Firestore, Hosting, Cloud Storage, Cloud Functions) |
| 2023 | Cloud Management Platform Construction | Tech lead on a custom Cloud Management Platform centralizing change management and operational tasks across a customer’s GCP environment. Wired Snyk IaC into the Terraform pipeline for both static IaC scanning and drift detection between Terraform state and the actual cloud |
| 2023-24 | MoodTrend | Mood tracking app for bipolar disorder. As tech lead, designed Flutter software architecture and CI/CD pipeline (Workload Identity + GitHub Actions + Terraform), contributing to initial release. Currently off the project (iOS / Android) |
| 2019–2023 | Large-scale Electronic Medical Record System (4 years) | Team member on a 30+ developer codebase with 400+ tables. Incrementally migrated parts of the legacy VB.NET / C# / ASP.NET / WPF stack from tightly-coupled to loosely-coupled — introducing ViewModel / Repository layers (MVVM), replacing live network calls in unit tests with mocks |
Beyond Code
Section titled “Beyond Code”When I’m not coding, I enjoy:
- 🎸 Music: Guitar playing and beat-making (YouTube)
- 📚 Reading: Exploring new ideas and perspectives
- 🧖 Digital Detox: I value downtime in baths and saunas above all else
Work hard, rest well.
Why koborin.ai?
Section titled “Why koborin.ai?”- koborinai is my family name
- koborin is my nickname
- koborin.ai = nickname +
.aiTLD
I frequently work with AI-related products like Genkit, and with the rise of Agentic AI, the .ai domain feels like a natural fit.
Feel free to explore this proving ground—I’ll keep tending to it bit by bit.