Product-focused full-stack developer building governed, deterministic SaaS platforms for manufacturing, academic automation, and POS systems. I design systems where data integrity is non-negotiable and audit trails are sealed at the database level.

• Factory ERP — Multi-tenant workforce intelligence for garment/textile manufacturing
• Academic Automation — AI-powered thesis generation with multi-agent orchestration and HITL quality gates
• POS Systems — In-browser point-of-sale with payments and inventory workflows
• Payroll Automation — Piece-rate payroll engines for textile mills with deterministic calculation

Core Principles:

• 🏛️ Governance First — RBAC, audit trails, immutable logs
• 📱 Mobile-First — Owner and supervisor workflows on the go
• 🔒 Data Integrity — RLS-enforced tenant isolation, RPC-only approvals
• 🌏 Local-First — Built for Myanmar market realities

Governed, enterprise-ready workforce intelligence SaaS for garment factories.

• Repo: kohtun386/factory-erp-supabase (private)
• Stack: React + Vite · Supabase · MUI v7 · TypeScript
• Status: Active Development (Phase 2 — Onboarding & Governance)
• Key Features:
  • Multi-tenant architecture with Row Level Security
  • Deterministic production log approvals (RPC-only)
  • Immutable audit trails
  • Invite-only self-serve onboarding
  • Mobile-first UX for supervisors and operators

Architecture Invariants:

• Approvals via SECURITY DEFINER RPCs only
• Approved records are immutable (no UPDATE, no DELETE)
• Process gates enforce valid state transitions
• Audit trails are append-only

"Approval is RPC-only. Immutability is enforced at the database level. No client bug can violate boundary invariants."

B2B SaaS platform for automated thesis generation using Event-Driven Multi-Agent Orchestration.

• Repo: kohtun386/shadow-thesis-factory-poc (private)
• Stack: FastAPI · n8n · Supabase (PostgreSQL, pgvector) · Python · React
• Status: Active Development

Architecture Highlights:

• Human-in-the-Loop (HITL) — Quality control and approval gating at every stage
• Citation Hard Validation — Law 4 enforcement for verified scholarly sourcing
• Deterministic Data Parsing — SPSS exports: numeric extraction separated from AI narrative generation
• Event-Driven Orchestration — n8n workflow engine with centralized error handling

Key Components:

• FastAPI Backend-for-Frontend (BFF)
• n8n workflow orchestration (wf_05_chapter_writer, wf_error_handler)
• Supabase with pgvector for semantic search
• CONCURRENTLY indexed for performance (drafts, thesis_framework)

Web-based point-of-sale system with payments and inventory UI.

• Repo: kohtun386/POS-system
• Stack: TypeScript · React · Vercel
• Demo: pos-system-gilt-mu.vercel.app
• Status: In Development
• Highlights: In-browser POS, payment workflows, inventory management

Public bilingual landing site for Vibe Code Tours.

• Repo: kohtun386/vibe-code-tours.github.io
• Stack: Static Site · HTML/CSS
• Live: vibecode.tours

My systems follow deterministic flow design:

┌─────────────────────────────────────────────────────────────┐
│                    GOVERNANCE LAYER                         │
│  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐ │
│  │ RBAC/Auth   │  │ Audit Logs  │  │ Tenant Isolation    │ │
│  │ (Supabase)  │  │ (Immutable) │  │ (RLS Policies)      │ │
│  └─────────────┘  └─────────────┘  └─────────────────────┘ │
└─────────────────────────────────────────────────────────────┘
                            │
                            ▼
┌─────────────────────────────────────────────────────────────┐
│                   BUSINESS LOGIC                            │
│  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐ │
│  │ RPC-Only    │  │ Service     │  │ Deterministic       │ │
│  │ Approvals   │  │ Layer       │  │ State Transitions   │ │
│  └─────────────┘  └─────────────┘  └─────────────────────┘ │
└─────────────────────────────────────────────────────────────┘
                            │
                            ▼
┌─────────────────────────────────────────────────────────────┐
│                     PRESENTATION                            │
│  ┌─────────────┐  ┌─────────────┐  ┌─────────────────────┐ │
│  │ Mobile-First│  │ React       │  │ MUI v7              │ │
│  │ UX          │  │ Context API │  │ Components          │ │
│  └─────────────┘  └─────────────┘  └─────────────────────┘ │
└─────────────────────────────────────────────────────────────┘

Open to: Collaboration on SaaS ERP systems, AI-powered automation, manufacturing workflows, and Myanmar-focused tech products.

Building governed, deterministic, enterprise-ready SaaS platforms.
_{Last updated: June 2026}