01Live
B2B SaaS
ChatKram
A social CRM that turns conversations from Instagram, Facebook, WhatsApp, and other channels into organized customer records and workflows.
Fractional CTO · Forward deployed engineer · Product builder
I turn complex ideas into products that ship.
Fractional CTO and hands-on builder for ambitious products. Nearly two decades shaping architecture, teams, and delivery across web, mobile, and applied AI.
Scroll to recent work
Current focusForward deployed · Applied AI
Tokyo, JapanWorking across time zones
20years in software
22+recent products mapped
20products live now
3web · mobile · AI
Selected work
Products built to solve real friction.
Recent work spans climate tech, testing, food discovery, accessibility, location-aware experiences, and AI-supported workflows.
View the complete build log
02Live
Games
VettiBet
A web and mobile prediction game where communities create questions, compete on leaderboards, and earn virtual points.
03Private beta
Govtech
dejikami
A multilingual paper-to-digital companion that helps people understand, fill, review, and submit Japanese government paperwork.
04Live
Location
GeoDra
Location-aware notes, treasure hunts, and event experiences that reveal stories only when people reach the place.
05Live
Developer tools
noSwag
AI-powered API testing that turns OpenAPI specifications into executable, editable pytest suites.
06Private beta
B2B SaaS
Fitout CRM
A construction CRM for mall fit-out teams to manage shops, plans, change approvals, documents, and project handoffs.
How I work · six steps
From direction to durable delivery.
A practical path from the first product decision to a production system the team can keep improving.
Align
Fractional CTO
Set direction, priorities, and decision ownership before complexity compounds.
StrategyRoadmapsTeam designShape
Product engineering
Turn an ambiguous problem into a focused product slice people can use.
Product scopeWebMobileDesign
System architecture
Define secure boundaries, APIs, and services proportionate to the next stage.
API designCloudSecurityGround
Data and platforms
Establish pragmatic foundations for identity, data, deployment, and operations.
PostgreSQLFirebaseDockerAccelerate
Applied AI
Apply AI where it improves a real decision or removes measurable friction.
RAGLLM workflowsOCRShip & evolve
Quality engineering
Build testing, observability, and feedback into every production release.
AutomationCI/CDObservability
Operating principle
Technical strategy only matters when it reaches production.
I work from the decision to the deployment: framing the product, setting the architecture, unblocking the team, and building the critical path when that is what moves the product forward.
Explore my approachNotes from the work
Writing on systems, quality, and building.
Hello World, or a Recap of 2023
A quick recap of 2023 plan vs actual. Built 4 apps, get on with good communities, and had a productive year.
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