Daisuke Adachi's profile on Product Hunt

About

Full-stack engineer with 20+ years of professional development experience, specializing in Ruby on Rails (Hotwire / Turbo / Stimulus) backends that power native iOS and Android clients. I design, ship, and operate all three layers single-handedly — from Rails 8.1 multi-tenant SaaS APIs to App Store / Google Play releases. Former project leader on a Rails web service used by ~50,000 users across ~100 schools. Since 2025 my focus has been AI-driven development with Claude Code and the Claude Agent SDK. I work most effectively in environments where Claude Code is available as a coding assistant.

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Gemologist

Tastemaker

Gone streaking 10

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Maker History

FieldPic ChecklistPhotograph every item on a checklist. Export one ZIP
Oct 2026
AriataAn iPhone instrument you cannot play wrong. Free.
Sep 2026
NativeAppTemplate AgentOne sentence → Rails + SwiftUI + Compose Android. Free, MIT.
May 2026
NativeAppTemplateNative iOS + Android + Rails boilerplate, now open source
My Texas MethodAutomate your strength training with Texas Method
Feb 2026

Forums

p/fieldpic-checklist

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7d ago

I priced 30 items at three supermarkets with FieldPic Checklist. Here is what came out

Before launch day I wanted a real job for the app, not a demo. So I took one 30-item checklist to three supermarkets on National Route 17 in Saitama, just north of Tokyo, and photographed every price tag: 124 photos.

Each photo landed on its item as I took it. The three exports (a CSV and the photos each) went to Claude, which read the tags and converted the prices so they compare fairly: per potato, per 100g of coffee, per 2 fillets. The same jar of Nescaf Gold Blend 120g was 862 at one store and 1,295 at another.

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5d ago

FieldPic Checklist - Photograph every item on a checklist. Export one ZIP

For site work that means a photo of every item on a list. Tap the camera on a row and the photo lands on that item, already named. Export one ZIP: a CSV, every photo in order, and a README with AI prompts. No account, no cloud. First 2 projects free.

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12d ago

Ariata - An iPhone instrument you cannot play wrong. Free.

The screen is a lattice of rows. Every touch lands on a note that fits, and a four-bar classical grammar moves the harmony underneath you. Loop a phrase, share a sound as a link, export background music that ends on a real cadence. Free. No account, no ads.