B.E. in Information Engineering from Chubu University. Fundamental Information Technology Engineer (FE) certified. Built over 6 years of career as a freelance system engineer since 2019, and founded SterriaR LLC in September 2024.
As a hands-on executive who still writes code, his strengths lie in both cross-domain implementation skills spanning AI / Web / Mobile / Infrastructure, and the engineering organization management cultivated through CTO experience (KAKAN LLC and Macros Inc.). At KAKAN, he experienced a buyout / M&A.
He has accumulated proven results on projects that combine sensitive information, strict deadlines, and emerging technologies — including a major insurance company's AI FAQ system, KINTO's in-vehicle driving-diagnostics AI agent, and a local government's online medical care system (taken to production in 3 months).
Specialties
AI / LLM Integration & Voice AI
Developed an in-vehicle driving-diagnostics agent leveraging the OpenAI API (STT/TTS/GPT-4V) for KINTO. Integrated functionality through Function Calling, built CNN/RNN models, and developed a FAQ system based on vector similarity search (major insurance company project). Operates an in-house AI pipeline daily using Claude / Gemini / Dify.
Web / SaaS Development
Next.js / React / Ruby on Rails / Django / Laravel / Node.js. Proven track record in SaaS news crawling, Stripe payment integration, real-time updates, and internal business systems (todo / work hours / chat / notifications). Programming experience on enterprise AI infrastructure (Dify RAG / multi-tenant).
Mobile / Cross-platform
Flutter / FlutterFlow / Firebase. Took an online medical care app for a local government to production in 3 months, including multi-department selection, video calling, and referral letter issuance.
Infrastructure / Automation
AWS (Lambda / EC2) / Docker / Linux / GCP. Numerous projects in DX with VBA macros and business efficiency. Built and currently operates an in-house daily AI distribution pipeline combining Playwright / APScheduler / ffmpeg.
Philosophy as an Executive
Solving Social Challenges with Technology
Through DX support in healthcare, education, and the public sector, we respond to regional disparities and labor shortages with technology. We focus not only on large enterprises but also on hands-on support for regional SMEs and startups.
Proposals Engineered Backwards from Implementation
Because the people who can build are the ones proposing, our suggestions never end up as pie in the sky. Like the AI pipeline that runs in-house every day, we design from working implementations as the starting point.
Both Wheels: Management & Technology
By combining engineering organization design grounded in CTO and M&A experience (KAKAN buyout) with hands-on engineering capability as an active developer, we present the optimal options for each client's business phase.
Career
Sep 2024 – Present (1 yr 8 mo)
Ginza, Tokyo
Founder & CEO — SterriaR LLC
Oversees AI-driven business improvement, contract development, and in-house product development. Drives projects across a broad technology stack including Ruby on Rails, Java, and Python.
Nov 2024 – Feb 2026 (1 yr 4 mo)
Remote
CTO — Macros Inc.
Joined as Chief Technology Officer.
Jan 2024 – Present (2 yr 4 mo)
Kanagawa
Programmer / SE / PL — Self-employed
Built an online medical care system for a local government with FlutterFlow. Achieved production launch in three months from October to December (multi-department selection, video calling, referral letter issuance).
Sep 2024 – Dec 2024 (4 mo) / Jan 2024 – Aug 2024 (Spela LLC)
Remote
AI Agent Development (KINTO Driving Diagnostics)
Built a driving-diagnostics AI in Python. Developed a voice AI agent combining STT (OpenAI API), TTS, GPT-4V, and Function Calling. Integrated location data, hard-braking detection, weather APIs, and vehicle control (windows, A/C).
Jan 2023 – Dec 2023 (1 yr)
Chiba / Remote
CTO / Programmer — KAKAN LLC
Served as CTO with concurrent engineering duties, ultimately experiencing a buyout / M&A. In parallel, developed a major insurance company's AI FAQ system (vector similarity search, CNN/RNN, AWS EC2, offline build).
Oct 2019 – Present (6 yr 7 mo)
Remote
System Engineer — Freelance
Continuously contracted on projects with a skill set covering 17+ technologies including Node.js and Java.
Dec 2021 – Dec 2022 (1 yr 1 mo)
Chiba / Remote
Programmer — Freelance Project
Developed a general-purpose internal management system (todo, work hours, chat, notifications, API).
Apr 2020 – Nov 2021 (1 yr 8 mo)
Kanagawa / Remote
Programmer — Freelance Project
SaaS news site crawling, subsidy / grant search API, Stripe payment screen, LP production, real-time display updates, MySQL design.
Apr 2019 – Mar 2020 (1 yr)
Aichi / Onsite
Programmer — Axxas Inc.
System implementation for DX (business efficiency). Built shift scheduling automation, business checklists, and internal applications using VBA macros.
Education
Chubu University
B.E. in Information Engineering
Apr 2015 – Mar 2019
Lab: MPRG (Machine Perception & Robotics Group). Graduation research: forward-collision risk prediction using LiDAR point cloud data.
Certifications
Fundamental Information Technology Engineer (FE)
Information-technology Promotion Agency (IPA)
June 2019
Top Skills
* The full list of skills is available on LinkedIn.
Looking to Speak Directly with the CEO?
For project inquiries, the CEO personally handles the initial discovery call.
Online available nationwide / First 30-minute Google Meet consultation free.