Mengchhiv Onn

Mengchhiv works across ChatEaver's backend, management dashboard, embeddable widget, and external integrations. ChatEaver is AEAI.studio's multi-tenant SaaS — an AI assistant businesses train on their own knowledge, deployed on the web and Telegram with human handoff. It supports English and Khmer, with paid plans from $20/month.

• Multi-tenant RAG and agentic system architecture
• Outcome and action workflows that turn conversations into business operations
• Human handoff and guarded confirmation flows
• Widget actions and structured conversational interactions
• Credit-safe AI execution, rate limits, signed webhooks, and S2S integrations
• AEAI.studio's ChatEaver identity, quote extraction, and saved draft-quote workflow

• AutoUS Direct

  Senior Backend Engineer · contract

  • Production Django/DRF APIs for US-to-Cambodia vehicle import, sales, and internal operations.
  • Weekly Scrapy + Celery pipeline that scrapes auction sites and upserts ~2,000 vehicles/week by VIN — replaced manual entry.
  • Reliability via DB indexing and ORM query refactors; real-time ops messaging with Django Channels.
  Jul 2025 – present

• GasApp

  Backend Architect & Technical Lead · contract

  • Backend architecture across FastAPI, Vue portals, a React Telegram Mini App, a customer bot, and a Flutter app.
  • Order & routing workflows with row locks, idempotency keys, and guarded state transitions — no duplicate dispatch or wallet mutations.
  • Hardened auth/session security; CI gates blocking merges when any of 400+ endpoints lacks tests; 2,100+ backend tests kept green through a major refactor.
  2026

• Runbodia

  Backend Lead · event ticketing platform

  • Backend for the officially launched bilingual event ticketing platform at runbodia.com.
  • Ticketing system: event registration, pricing tiers, capacity controls, and online payment via ACLEDA (a local Cambodian bank) with KHQR confirmation.
  • Modular Django/DRF APIs, Telegram-powered attendance workflows, code review, and Docker deployment.
  2025

• WingBank

  Backend Developer

  • Production ERP & HR modules (Django/DRF, PostgreSQL, Celery) for internal enterprise operations.
  • Cut a slow ERP list page from 7–10s to <1s by removing N+1 queries; designed RBAC, JWT auth, and approval flows.
  Mar 2023 – Dec 2024

• Techbodia

  Software Engineer

  • Microservice backend (.NET Core, SQL Server) for a betting platform peaking at 1M+ requests/day during the World Cup.
  • Decoupled services over a message queue / event bus; containerized and orchestrated to scale horizontally under live peak traffic.
  • Game-provider integrations, settlement callbacks, bet calculation, and CI/CD kept green under production load.
  Sep 2022 – Feb 2023

• Atech

  Software Developer

  • ERP features and internal tools in C#/.NET/SQL Server.
  • Inventory, purchasing, POS sync, Acumatica, and QuickBooks integrations via API automation.
  May 2019 – Aug 2022