Rainpulse LLC / Independent Technology Consulting Firm

Enterprise transformation, carried through to implementation.Delivered through AI and software engineering.

From strategic intent to technical implementation and lasting enterprise value.

Through technology consulting, AI adoption, and large-scale web application development, we connect business priorities with execution on the ground. From strategy and architecture to development and operational improvement, we work alongside clients with accountability for business outcomes.

Technology ConsultingAI TransformationProduct Architecture

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About Rainpulse

A consulting partner connecting technology and business with implementation accountability

Rainpulse LLC is an Osaka-based technology consulting firm supporting enterprise digital transformation from strategy through architecture, implementation, and adoption. We connect management priorities with operational constraints through AI engineering, large-scale web application development, and product architecture. Led by a representative with more than 11 years of hands-on experience as CTO, technical lead, and global team operator, Rainpulse takes responsibility beyond advisory work and delivers working systems.

Rainpulse LLC is led by Shuji Iwata and based in Osaka, Japan. We support clients end to end, from consulting and architecture discussion to hands-on implementation and post-launch operational advisory.

AI Transformation

AI transformation

We embed generative AI, LLMs, and RAG into business processes, supporting operational design and product implementation beyond PoC.

Architecture Advisory

Architecture advisory

We design technology foundations, development organizations, and quality practices that withstand business growth, grounded in CTO and technical lead experience.

Technical Consulting

Technical consulting

We support problem framing, technology selection, architecture design, and team setup, implementing systems robust enough for real operation.

Consulting Division

Consulting

Strategy, operations, UI/UX, and software delivery—carried end to end.

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AI Research Division

AI Research

Connecting research and engineering to design AI systems that work in the field.

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Selected Engagements

Selected engagements

A selection of service and product development engagements delivered by Shuji Iwata as an individual contractor and consultant.

AI / LLMNov 2025 – Present

LLM feature development for education products

codeTakt

Developing LLM features for education technology products under the CTO as part of a three-person core AI integration team.

LLMTypeScriptAI Integration

BackendMay – Jun 2025

Layer 2 infrastructure backend

PocketSign

Designed and implemented core backend services for Layer 2 infrastructure in Go.

GoInfrastructure

AI / WebJan 2023 – Oct 2025

Healthcare AI platform / RAG Slackbot

CureApp / axianext

Led web development and optimization for a healthcare AI platform, and built a ChatGPT-powered RAG Slackbot for internal knowledge management.

LangChainRAGTypeScriptPython

PlatformSep 2021 – Jan 2023

Meta-internet platform

Trishula LLC (CTO)

Led development of a Reddit-like meta-internet platform as CTO, owning architecture, CI/CD, and deployment end to end.

Next.jsRustSeaORMTypeScript

EdTechSep 2020 – Sep 2021

Online education platform

ClassDo (Singapore)

Improved canvas rendering, stroke interpolation, and PDF output pipelines while also serving as Data Scientist.

VueTypeScriptAWS

AutomationJun 2017 – Jun 2020

Amazon listing automation system

Contract

Designed and built an end-to-end product listing automation system, including browser automation, admin console, and data pipelines.

ReactPythonNode.jsAWS

FintechJan 2014 – Jun 2017

Payment service Staple frontend

Contract

Frontend development for a payment service, including unit tests and admin console implementation.

JavaScriptFrontend

Experience

Professional experience

More than 11 years of practical experience, from frontend contracting to CTO and independent consulting roles.

codeTakt Inc.

Nov 2025 – Present

LLM Engineer·Full-time·Tokyo / Remote

—Developing LLM-related product features under the CTO
—AI integration for education technology products
—Member of a three-person core engineering team

PocketSign Inc.

May 2025 – Jun 2025

Backend Engineer·Contract·Tokyo

—Backend development for Layer 2 infrastructure in Go
—Design and implementation of core backend services

CureApp / axianext

Jan 2023 – Oct 2025

Tech Lead·Contract / Independent·Remote

—Led web development and service optimization for a healthcare AI platform
—Built a ChatGPT-powered RAG Slackbot for internal knowledge management
—Built AI services with LangChain, LangSmith, and SentenceTransformer
—Formed and operated a three-person global engineering team
—Frontend/backend optimization and UX improvement

TypeScriptPythonLangChainLangSmith

Trishula LLC

Sep 2021 – Jan 2023

CTO·Executive·Tokyo

—Led development of a Reddit-like meta-internet platform
—Owned architecture, CI/CD, deployment, and team workflows
—Managed a six-person engineering team

Next.jsTypeScriptRustSeaORM

ClassDo Inc.

Sep 2020 – Sep 2021

Full-stack Engineer / Data Scientist·Full-time·Singapore / Fully remote

—Developed an online education platform
—Optimized canvas rendering and stroke interpolation algorithms
—Improved the PDF output pipeline
—Also served as Data Scientist
—Worked in an English-speaking Singapore-based environment

VueTypeScriptAWS

Amazon Listing Automation System

Jun 2017 – Jun 2020

Full-stack Engineer·Contract·Tokyo

—Designed and built an end-to-end product listing automation system
—Browser automation, admin console, and data pipelines
—Owned the full system architecture as the sole engineer

ReactPythonNode.jsTypeScriptAWS

Payment Service "Staple"

Jan 2014 – Jun 2017

Frontend Engineer·Contract·Tokyo

—Frontend development for a payment service
—Implemented unit tests and admin console features

Capabilities

Programming languages

TypeScript

9+ years

Python

10+ years

Rust

2+ years

Production (2025)

JavaScript / React

7+ years

Frameworks and tools

Frontend

ReactNext.jsVueTailwind CSSThree.js / R3FGSAP

Backend

Node.jsFlaskExpressGo (net/http)

Database

PrismaTypeORMSeaORMPostgreSQLSQLiteBigQuery

AI / ML

LangChainLangSmithSentenceTransformerRAG systemsDifyPrompt Engineering

Cloud

AWS (EC2, S3, Lambda)

Other

DockerLinuxGitCI/CD

Strengths

—

Architecture design optimized for long-term product evolution

—

Bridging business strategy and technical implementation

—

Building and operating cross-functional and global engineering teams

—

Driving AI adoption, process improvement, and product development through implementation

Open Source

Open source / personal projects

GitHub: 92+ repositories · 12,000+ contributions per year

root-paradigm

→

Event-sourcing state system with PostgreSQL/SQLite, SSE, and MCP server

TypeScript

lay

→

Minimal deep-lens state management library

TypeScript, React

darkcore

→

Functor / Applicative / Monad abstractions for Python

Python

markdown-next

→

Markdown parser with AST output and plugin system

TypeScript

rex

→

Rx (Reactive Extensions) library for Nim

Nim

cray

→

Workflow engine library

TypeScript

Contact

For consultations and project inquiries, please reach out through one of the channels below. We can discuss consulting, architecture advisory, implementation, and operational support according to your business needs.

minamorl@rainpulse.ai