Work
Systems I built and run
Each one is in production or published, with the numbers it produced.
Multilingual Booking Platform
Booking and payments for a Tokyo photo studio whose customers book from 20+ countries.
After checkout
every booking, automatically
$19.9k
best month in revenue
754
transactions in 8.5 months
39%
funnel drop-off identified
- Next.js
- TypeScript
- Go
- PostgreSQL
- AWS
- Stripe
- Cloudflare
Staff Operations App (iOS)
An iOS app that moved job assignment, earnings, and month-end invoicing for eight contract photographers out of DMs and spreadsheets.
Step 01
Claim a job
Open jobs appear in the app. One tap claims it.
Step 02
Track earnings
Pay is calculated per job, automatically.
Step 03
Invoice at month end
Invoices generate and submit themselves.
#418
Sat · 10:00
Location A
#419
Sat · 14:30
Location B
#421
Sun · 09:00
Location C
Sample data
8
contract photographers on one app
Weekly
production use by the team
- React Native
- Expo
- Stripe
- Google Calendar API
- AWS
AI Agent for Product Management
An agent built on Claude Code and MCP that runs the chain from problem discovery to PRD to UI prototype.
Published
on the Mercari Engineering blog
In use
internally at Mercari
- Claude Code
- MCP (Model Context Protocol)
- Anthropic API
Automated Content Pipeline
A pipeline that selects footage, writes captions, and renders 10 short-form videos every morning with no human input.
Instagram Insights · last 30 days — @tettyphotostudio, the studio account this pipeline posts to: 17K profile visits, 2.5K link-in-bio taps, Reels 77% of views.
10
videos generated every morning
1.14M
views on the account in 30 days
- Python
- AWS
- LLM APIs
- Video processing
Iron & Code — A Free Tool Every Monday
Free calculators for lifters, from plate math to 1RM and macros, shipped on a weekly cadence with a short video for each.
Mon · W1
Mon · W2
Mon · W3
Mon · W4
Mon · W5
Mon · W6
Weekly
a new free tool every Monday
Solo
designed, built, and shipped alone
- Next.js
- TypeScript
- Vercel
Measured, not guessed
Every step of the booking funnel is instrumented — which is how a 39% drop-off between picking a date and picking a time showed up, and got fixed.
Booking funnel
7 steps1.03%visit → booked
- Users
- 87
- Of visitors
- 1.6%
- From prev.
- 12.4%
- 1Visited site5,332
- 2Viewed plans82.9%4,418
- 3Viewed locations29.5%1,305
- 4Opened booking90.1%1,176
- 5Picked a date59.4%699
- 6Reached payment12.4%87
- 7Booked63.2%55
GA4 · book.tettyphotostudio.com · Aug 1 – Aug 31, 2026
Seven steps tracked in GA4, from the first visit to a completed booking — the biggest leaks stand out on their own.
Try the flowBookings, Stripe deposits, calendar sync, and photographer assignment arrive as one ordered stream.
See the stackMicrosoft Clarity replays showed where people stalled. The fix went to the time-slot step, not a redesign.
Ask about itGA4 funnel events
Instrumentation on every step of the booking funnel, from plan to deposit.
Session replay
Microsoft Clarity recordings show where customers stall, step by step.
Stripe payment events
30% deposit at booking, remaining balance collected automatically after the shoot.
Calendar sync
Photographer assignment kept in sync with Google Calendar.
Search Console
Branded searches bring nearly every click. Non-branded terms like “tokyo photo studio” sit around position 14 — the next thing to grow.
book.tettyphotostudio.com · web · last 3 months
- Clicks
- 138
- Impressions
- 910
- CTR
- 15.2%
| Top queries | Clicks | Position |
|---|---|---|
| tetty photo studio | 41 | 4.2 |
| tettyphotostudio | 24 | 1.2 |
| tokyo photo studio42 impressions · next to grow | 1 | 14.2 |
AUDIENCE
Personal Brand — 0 to 30,000 Followers
Founder, creator, analyst.
Built a personal brand in the motivation, fitness, and self-growth space from zero. Multiple videos passed 1M views.
I ran a 13-month analysis of my own account data and found that share count — not follower count — is the only reliable leading indicator of reach. Follower count turned out to be nearly useless as a signal.
Why this is on a developer's portfolio
- Most developers can build a product but can't get anyone to see it.
- Most creators can get attention but can't build anything.
- I do both, and I measure both.
Audience analytics
- @imshogo.k
- Motivation
- Fitness
- Self-growth
- 0 → 30,000 followers
- Multiple videos past 1M views
- 13 months of account data
- Shares → reach
- 2.03M views · last 30 days
Views
2.03M
FollowersNew followers
+1,264
Interactions
234K
Daily average
CalculatedPer day
- Views≈ 67,604
- New followers≈ 42
- Interactions≈ 7,799
≈ 115 interactions per 1,000 views.
Instagram Insights · @imshogo.k · last 30 days · Sep 2026
Have something that needs to be built?
Tell me the workflow and what a good outcome looks like. I'll reply with a clear next step.
- 1,200+ clients handled
- Published at Mercari
- 30K followers