YEJUA.
Portfolio & Case Studies

Not just our own products.
Work other people paid for.

Client Work

Delivered engagements

Enterprise client work · delivered

KT&G Leadership Assessment

Delivered

A live, timed leadership development-centre simulation

A demanding enterprise assessment system: 40 minutes of case review, a 20-minute interview, a 5-minute follow-up, then a full evaluation report.

Timed case review with enforced deadlines
Interview simulation against two AI personas
Automatic generation of the summary evaluation report
Google Sheets logging synced to an admin dashboard
Session state survives a page reload
React 19Tailwind 4ExpressPM2
Internal Systems

Infrastructure we run ourselves

These are not for sale. The surest way to prove we can build something is that our own company runs on it.

ECHO

Client work · in progress
In progress

Self-understanding built on a hypothesis-and-test question loop

An AI mirror that writes a new question every turn. It forms hypotheses from your answers and aims the next question at whatever it is least sure about.

  • Unstructured psychological hypothesis–verification question engine
  • Conversation-driven self-understanding reports
  • Voice input via speech-to-text
  • Paid report delivery
  • Eight Supabase Edge Functions in production

AI Office

Internal infrastructure
Live

Departmental AI staff that report every morning

AI staff handle work by department and only send a link when a human decision is required. A daily report arrives by email.

  • Decision portal with signed-token approval and resume
  • Department debate engine: draft, rebut, synthesise, judge
  • Automatic daily work reports
  • 08:30 daily digest of government support programmes
  • Zero-cost stub mode toggled against live inference

Yejua Mall Operations

Internal system
Live

Cross-border commerce operations dashboard

Product and order operations for our Japan-sourcing proxy-purchase mall, synchronising Cafe24 orders every 15 minutes.

  • Unified product and order management
  • Automatic Cafe24 order sync every 15 minutes
  • Personal customs code extraction
  • Collector pushes into the admin API

Need a system at this level?

Assessment simulations, diagnostic reports, internal automation portals — we take them from design through to running them.

Discuss an engagement