Architecting Intelligence.

Engineering the intersection of sophisticated web development and modular AI solutions.

Kazuki Inamura

Kazuki Inamura

AI Engineer | LLM | NLP

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I am a Full-Stack AI Engineer specializing in Large Language Models and Natural Language Processing, based in Tokyo, Japan.

With over 9 years of experience, my mission is to bridge cutting-edge AI research with scalable, market-ready deployments — building systems that deliver real business value.

I have led the full lifecycle of LLM-powered SaaS products from prototyping to production, including an Office add-in for automated contract review and a VoiceBot platform serving customers across diverse industries.

I have also led cross-functional teams of up to 12 engineers, acting concurrently as both Tech Lead and Product Manager to define roadmaps and drive product growth.

9+

Years of Experience

12+

Engineers Led

3+

Products Launched

10+

Industries Served

Capabilities

Engineered Solutions.

Specialized services focused on bridging the gap between sophisticated software architecture and autonomous intelligence.

LLM Product Development

Building production-grade LLM-powered features end-to-end — from prototyping and evaluation to deployment and continuous improvement using OpenAI APIs.

Specialized Service

NLP Solutions

Delivering custom NLP systems including text classification, named entity recognition, document summarization, and information extraction at scale.

Specialized Service

RAG System Design

Engineering retrieval-augmented generation systems with embeddings, vector search, and knowledge base automation to ground LLMs in domain-specific data.

Specialized Service

LLM Automation & Pipelines

Automating knowledge base configuration, model evaluation, and performance refinement — reducing onboarding time and maintenance costs for AI-driven products.

Specialized Service

Technical Leadership

Leading cross-functional engineering teams, defining technical direction, owning roadmaps, and bridging LLM research with practical product strategy.

Specialized Service

Full-Stack Integration

Integrating AI capabilities into web applications and Office add-ins using TypeScript, React, and Python backends with seamless API design.

Specialized Service
Proven Excellence

Career Highlights.

Key milestones from Kazuki@apos;s career — production LLM systems, product launches, and NLP innovations recognized for engineering depth and real business impact.

Market Launch
Contract Review Office Add-in

Contract Review Office Add-in

LLM-powered Office add-in for automated contract review — from prototyping to market launch using OpenAI APIs, embeddings, and vector search with seamless Office integration.

Production System
TypeScriptOpenAIPythonEmbeddingsVector Search
Production System
VoiceBot LLM Automation Platform

VoiceBot LLM Automation Platform

LLM-driven automation for a VoiceBot platform — automating knowledge base configuration, performance evaluation, and continuous model refinement across diverse customer domains.

Reduced Onboarding Time
PythonOpenAILangChainLLMNLP
Near State-of-the-Art NLP
Japanese Contract Analysis SaaS

Japanese Contract Analysis SaaS

NLP-powered SaaS platform for Japanese contract analysis achieving near state-of-the-art performance, later expanded to English contracts using deep learning.

Near SOTA Performance
PythonNLPDeep LearningTypeScript
Project Portfolio

Featured Creations.

A curated selection of autonomous systems and sophisticated applications bridging the gap between complexity and utility.

Featured Project

LLM-Powered
Contract Review Add-in.

Led end-to-end development of an Office add-in for automated contract review at MNTSQ — from prototype to production using OpenAI APIs, embeddings, and vector search.

TypeScriptOpenAIPythonNext.js
Contract Review Office Add-in
Contract Review Office Add-in

Contract Review Office Add-in

Led end-to-end development of an LLM-powered Office add-in for automated contract review at MNTSQ. From prototyping to market launch using OpenAI APIs, embeddings, and vector search with seamless Office integration.

TypeScriptOpenAIPythonNext.js
VoiceBot LLM Automation

VoiceBot LLM Automation

Designed and productionized LLM-driven features for a VoiceBot platform at IVRy. Automated knowledge base configuration, performance evaluation, and continuous refinement — reducing onboarding time and maintenance costs.

PythonOpenAILangChain
Japanese Contract Analysis SaaS

Japanese Contract Analysis SaaS

Built the MVP of a SaaS contract analysis platform using deep learning and rule-based NLP, achieving near state-of-the-art performance for Japanese contracts. Later expanded capabilities to English contracts.

PythonTypeScript
Document Summarization & NLP Tools

Document Summarization & NLP Tools

Delivered AI-powered NLP solutions across diverse industries at PKSHA Technology — document summarization, news article search & recommendation, and Voice of Customer (VoC) analysis engines.

PythonTypeScript
In-house NLP Framework

In-house NLP Framework

Designed and led development of standardized in-house NLP modules and reusable frameworks at PKSHA Technology to accelerate delivery and enable efficient knowledge sharing across client projects.

Python
Chatbot Dialog Classification

Chatbot Dialog Classification

Investigated deep learning models for dialogue classification at CyberAgent, improving recognition accuracy of chatbot systems in the AdTech division. Built automated training pipelines with Apache Spark.

Python
Social Proof

Client Feedback.

Trusted by technical leaders and industry pioneers across the globe.

"Kazuki transformed our chaotic data pipelines into a sleek, automated workflow. His understanding of LLMs and NLP is simply world-class."

Sarah Jenkins

Sarah Jenkins

CTO, TechStart

Austin, TX

"The custom RAG architecture he built allowed us to query our documentation with 99% accuracy. A truly game-changing implementation."

Mark Thompson

Mark Thompson

Senior Engineer, DataFlow

Seattle, WA

"We needed a full-stack platform that could handle real-time LLM inference. Kazuki delivered a solution that was not only fast but beautifully designed."

Emily Chen

Emily Chen

Product Lead, InnovateCorp

San Francisco, CA

"His expertise in CrewAI and multi-agent systems helped us automate our entire customer support tier. The ROI has been phenomenal."

David Wilson

David Wilson

Founder, AI Solutions

London, UK

"It is rare to find an engineer who bridges the gap between complex backend logic and premium UI so seamlessly. Highly recommended."

Jessica Rodriguez

Jessica Rodriguez

Director of Eng, SoftSys

Madrid, Spain

"The distributed system architecture he proposed saved us 40% in monthly infrastructure costs while boosting performance."

Michael Chang

Michael Chang

Staff Engineer, CloudScale

Toronto, Canada

"Kazuki is a visionary. He took our rough concept for an LLM-powered product and turned it into a polished, market-ready solution."

Amanda White

Amanda White

VP Product, FutureTech

New York, NY

"Technically brilliant and a pleasure to work with. His code is clean, well-documented, and incredibly robust."

Robert Baker

Robert Baker

Lead Architect, DevOps Inc

Berlin, Germany

"We threw some very difficult problems at him regarding vector search optimization, and he solved them in days. Exceptional talent."

Lisa Kumar

Lisa Kumar

CEO, StartNext

Singapore

"His ability to integrate Python-based ML models with Next.js frontends is unparalleled. He built us a seamless, high-performance dashboard."

James Peterson

James Peterson

ML Engineer, BrainWaves

Boston, MA

"Finally, a developer who respects design! He implemented our Figma prototypes with pixel-perfect precision and added great micro-interactions."

Olivia Martin

Olivia Martin

Design Lead, CreativeAI

Paris, France

"He architected a serverless solution that scaled automatically during our Black Friday event. Zero downtime, zero stress."

William Turner

William Turner

Backend Lead, Serverless Co

Chicago, IL

"The insights we get from the analytics dashboard he built are invaluable. He knows how to present complex data simply."

Sophie Anderson

Sophie Anderson

Head of Data, Insightful

Sydney, Australia

"Reliable, precise, and fast. Kazuki helped us design and optimize our NLP pipeline with exceptional technical depth."

Thomas Wright

Thomas Wright

Blockchain Dev, CryptoSecure

Zurich, Switzerland

"I was impressed by his component architecture. The system he established is scalable and easy for our junior devs to maintain."

Isabella Garcia

Isabella Garcia

Frontend Architect, WebFlows

Barcelona, Spain

"He set up a robust CI/CD pipeline that saved us hours of manual deployment work every week. A true automation expert."

Daniel Lee

Daniel Lee

SRE, UpTime

Seoul, South Korea

"Kazuki fits into any agile team perfectly. He communicates clearly, delivers on time, and always exceeds expectations."

Grace Kim

Grace Kim

Product Owner, AgileSoft

Vancouver, Canada

"His contributions to our open source project were high quality and well thought out. He understands the community and the code."

Nathan Clark

Nathan Clark

DevRel, OpenSource

Amsterdam, NL

"We needed a complex React Native module and he built it in record time. App performance improved by 20% immediately."

Hannah Scott

Hannah Scott

Tech Lead, MobileFirst

Dublin, Ireland

"Working with him was a learning experience. His knowledge of modern React patterns and server components is top notch."

Ryan King

Ryan King

Full Stack Dev, Stacked

Denver, CO

"Kazuki transformed our chaotic data pipelines into a sleek, automated workflow. His understanding of LLMs and NLP is simply world-class."

Sarah Jenkins

Sarah Jenkins

CTO, TechStart

Austin, TX

"The custom RAG architecture he built allowed us to query our documentation with 99% accuracy. A truly game-changing implementation."

Mark Thompson

Mark Thompson

Senior Engineer, DataFlow

Seattle, WA

"We needed a full-stack platform that could handle real-time LLM inference. Kazuki delivered a solution that was not only fast but beautifully designed."

Emily Chen

Emily Chen

Product Lead, InnovateCorp

San Francisco, CA

"His expertise in CrewAI and multi-agent systems helped us automate our entire customer support tier. The ROI has been phenomenal."

David Wilson

David Wilson

Founder, AI Solutions

London, UK

"It is rare to find an engineer who bridges the gap between complex backend logic and premium UI so seamlessly. Highly recommended."

Jessica Rodriguez

Jessica Rodriguez

Director of Eng, SoftSys

Madrid, Spain

"The distributed system architecture he proposed saved us 40% in monthly infrastructure costs while boosting performance."

Michael Chang

Michael Chang

Staff Engineer, CloudScale

Toronto, Canada

"Kazuki is a visionary. He took our rough concept for an LLM-powered product and turned it into a polished, market-ready solution."

Amanda White

Amanda White

VP Product, FutureTech

New York, NY

"Technically brilliant and a pleasure to work with. His code is clean, well-documented, and incredibly robust."

Robert Baker

Robert Baker

Lead Architect, DevOps Inc

Berlin, Germany

"We threw some very difficult problems at him regarding vector search optimization, and he solved them in days. Exceptional talent."

Lisa Kumar

Lisa Kumar

CEO, StartNext

Singapore

"His ability to integrate Python-based ML models with Next.js frontends is unparalleled. He built us a seamless, high-performance dashboard."

James Peterson

James Peterson

ML Engineer, BrainWaves

Boston, MA

"Finally, a developer who respects design! He implemented our Figma prototypes with pixel-perfect precision and added great micro-interactions."

Olivia Martin

Olivia Martin

Design Lead, CreativeAI

Paris, France

"He architected a serverless solution that scaled automatically during our Black Friday event. Zero downtime, zero stress."

William Turner

William Turner

Backend Lead, Serverless Co

Chicago, IL

"The insights we get from the analytics dashboard he built are invaluable. He knows how to present complex data simply."

Sophie Anderson

Sophie Anderson

Head of Data, Insightful

Sydney, Australia

"Reliable, precise, and fast. Kazuki helped us design and optimize our NLP pipeline with exceptional technical depth."

Thomas Wright

Thomas Wright

Blockchain Dev, CryptoSecure

Zurich, Switzerland

"I was impressed by his component architecture. The system he established is scalable and easy for our junior devs to maintain."

Isabella Garcia

Isabella Garcia

Frontend Architect, WebFlows

Barcelona, Spain

"He set up a robust CI/CD pipeline that saved us hours of manual deployment work every week. A true automation expert."

Daniel Lee

Daniel Lee

SRE, UpTime

Seoul, South Korea

"Kazuki fits into any agile team perfectly. He communicates clearly, delivers on time, and always exceeds expectations."

Grace Kim

Grace Kim

Product Owner, AgileSoft

Vancouver, Canada

"His contributions to our open source project were high quality and well thought out. He understands the community and the code."

Nathan Clark

Nathan Clark

DevRel, OpenSource

Amsterdam, NL

"We needed a complex React Native module and he built it in record time. App performance improved by 20% immediately."

Hannah Scott

Hannah Scott

Tech Lead, MobileFirst

Dublin, Ireland

"Working with him was a learning experience. His knowledge of modern React patterns and server components is top notch."

Ryan King

Ryan King

Full Stack Dev, Stacked

Denver, CO
Capabilities

Tech Stack & Expert Skills

My technical belt is well-stocked. I utilize a comprehensive arsenal of modern tools to architect resilient, scalable, and autonomous systems.

5 Skills

LLM & AI Engineering

Building and productionizing large language model systems end-to-end

Large Language Models

97%

OpenAI APIs & Embeddings

95%

Vector Search & RAG

92%

LLM Evaluation & Fine-tuning

88%

Prompt Engineering

95%
5 Skills

NLP & Machine Learning

Core natural language processing and deep learning expertise

Natural Language Processing

97%

Text Classification & NER

93%

Document Analysis & Summarization

92%

Deep Learning (PyTorch / TF)

88%

Machine Translation

85%
5 Skills

Python & Backend

Python-first backend engineering and ML pipeline development

Python

98%

FastAPI / REST APIs

90%

Apache Spark

82%

ML Pipelines & Data Annotation

88%

Data Orchestration

85%
5 Skills

TypeScript & Frontend

TypeScript-driven frontend and Office add-in integration

TypeScript

90%

React / Next.js

85%

Node.js

82%

Office Add-in (Office.js)

88%

GraphQL / REST Integration

80%
5 Skills

Cloud & DevOps

Cloud infrastructure and deployment pipelines for AI products

AWS / GCP

80%

Docker / Compose

85%

Git / GitHub

98%

CI/CD Pipelines

85%

Vercel / Cloud Deploy

88%
5 Skills

Leadership & Management

Engineering team leadership and product strategy

Team Management (12+ engineers)

92%

Product Management

88%

Roadmap & Technical Direction

90%

Cross-functional Collaboration

95%

Agile / Scrum

90%
Support

Frequently Asked Questions.

Here are clear answers to the most common questions about my process, tools, and pricing.

Can't find what you are looking for?

Ask me directly
Timelines vary based on complexity. A specialized AI agent prototype can take 1-2 weeks, while a comprehensive full-stack platform integrated with complex multi-agent workflows typically spans 6-12 weeks.
Get In Touch

Let's Build Something Great.

Have a project in mind or looking for advanced AI solutions? Reach out and let's discuss how we can bring your ideas to life with state-of-the-art technology.