selected systems

Projects

Production AI and backend systems spanning RAG, agent tools, multi-tenant SaaS, payments, real-time dispatch, and institutional workflows.

Multi-tenant AI customer support

Biz24 AI E-commerce SaaS Platform

Production-ready SaaS platform that lets each shop run a customizable LLM-powered support agent with RAG, persistent memory, multilingual responses, and real-time chat.

  • Shop-scoped PDF/text ingestion, chunking, OpenAI-compatible embeddings, and Qdrant vector retrieval.
  • Hybrid product search with PostgreSQL full-text search and Reciprocal Rank Fusion.
  • Agent tools for product questions, orders, carts, checkout, cancellations, support escalation, Telegram, Facebook Messenger, and web chat.
PythonFastAPILangChainPostgreSQLQdrantRedisBullMQSocket.IO

AI image classification for construction assets

MKI AI Material & Asset Management System

AI-powered backend for classifying construction materials and assets from images, combining LLM image reasoning with AWS Rekognition Custom Labels.

  • Generated structured Japanese descriptions for shape, material, texture, pattern, color, and use case.
  • Matched image reasoning output against internal PDF knowledge records.
  • Built S3 image pipelines, presigned URLs, dataset cleanup, Rekognition model startup, and Ground Truth-compatible metadata workflows.
FastAPIPythonOpenAIAWSAWS RekognitionMySQLSQLAlchemyAlembic

Sales workflow automation

CRM & Sales Agentic System

Modular CRM backend with an AI-assisted quotation and sales agent architecture built around historical CRM context and approved business data.

  • Managed leads, customers, quotations, contracts, sales pipelines, bulk uploads, activity logs, analytics, user access, and document services.
  • Designed RAG-powered quotation description generation using approved CRM history.
  • Built Sales AI Agent workflows for lead analysis, quotation assistance, follow-up suggestions, and customer context retrieval.
Node.jsNestJSPostgreSQLTypeORMPythonLangChainpgvector

Payment platform integration

OBS Payment Gateway Backend

Production-grade payment gateway backend unifying major Myanmar payment providers and card networks behind a single secure REST API.

  • Implemented checkout sessions, API-key authentication, JWT request signing, duplicate order prevention, redirects, callbacks, and transaction inquiry workflows.
  • Built transaction lifecycle management, MDR/service-fee calculations, RBAC/CASL permissions, OTP login, audit logs, webhook trails, provider logs, and merchant analytics.
  • Integrated KBZPay, AYA Pay, Wave Pay, MPU, MMQR, APlus Pay, Visa, Mastercard, and JCB.
Node.jsNestJSTypeScriptPostgreSQLTypeORM

Real-time dispatch and mobility backend

Fair Price Taxi - Ride Hailing System

Production ride-hailing backend supporting passenger, driver, and admin workflows across booking, dispatch, transactions, notifications, and analytics.

  • Implemented real-time driver dispatch with Socket.IO, Redis, and BullMQ.
  • Handled location tracking, auto-reject timeouts, ride status updates, push notifications, and driver eligibility checks.
  • Designed dynamic pricing for car grades, distance fares, peak-hour rules, special-location fees, add-ons, penalties, multi-destination fees, and fare rounding.
Node.jsNestJSPostgreSQLRedisBullMQSocket.IOFirebaseAWS S3

Education platform and payment workflows

University Student & Payment Backend System

Centralized university backend for registration, admissions, academic structures, online examinations, payment workflows, financial transactions, and bulk processing.

  • Built external student validation APIs, dynamic fee calculation, multi-gateway aggregation, asynchronous webhooks, JWT/RBAC security, 2FA, and Turnstile protection.
  • Implemented activity logging and high-performance ExcelJS pipelines for bulk academic and financial data operations.
Node.jsNestJSTypeScriptPostgreSQLExcelJS