# Charlie Tang Hoong

> Forward Deployed AI & Automation Engineer based in Selangor, Malaysia.
> 15+ years of production software delivery across AdTech, e-commerce,
> logistics and enterprise automation. Works with customers in Malaysia,
> Singapore and the wider APAC region.
> Display name: Charlie Tang Hoong. Handle: tanghoong. Chinese name: 郑虎.
> Contact: charlie@tanghoong.com

## Start here
- [About](https://tanghoong.com/about/index.md): the full professional history
- [Selected Work](https://tanghoong.com/work/index.md): five deliveries, discovery to production
- [Contact](https://tanghoong.com/contact/index.md): roles sought, locations, email

## Case studies
- [Building against a system we did not own](https://tanghoong.com/work/legacy-erp-booking-platform/index.md): A multi-role booking and ordering platform went live against an enterprise client's legacy ERP, with the API contract negotiated directly with the client's own engineers and every scope change signed off before it reached engineering.
- [Taking the typing out of a document workflow that could not go offline](https://tanghoong.com/work/ocr-llm-document-pipeline/index.md): A hybrid OCR and LLM pipeline substantially reduced the manual data entry in a high-volume shipping-document workflow, inside an operation whose source systems had no API and could not be replaced.
- [Serving an AI assistant's traffic without holding a connection open](https://tanghoong.com/work/ai-assistant-queue-architecture/index.md): Re-architected an AI customer-support assistant's request path so that a conversation is queued and polled rather than held open on a synchronous connection — delivered and merged.
- [Three AI proposals, and the two I advised against](https://tanghoong.com/work/ai-feasibility-assessments/index.md): Three AI feasibility engagements in three unrelated domains, each turned into a solution design with a costed build estimate: two were correctly declined on capital cost, and the third was built.
- [The engineering floor: billions of impressions, and a marketplace that ran itself](https://tanghoong.com/work/adtech-scale-marketplace/index.md): Eleven years across two stints at the same AdTech company: four as the sole front-end engineer on a platform conversion, then a self-serve advertising marketplace built end to end, then backend services carrying tens of thousands of requests a second.

## Reference
- [How I Work](https://tanghoong.com/how-i-work/index.md): the seven-step delivery method
- [Capabilities](https://tanghoong.com/capabilities/index.md): five capability groups, each linked to the case that proves it
- [Experience](https://tanghoong.com/experience/index.md): the verifiable employment record
- [Products](https://tanghoong.com/products/index.md): tulis, lukis and cakap — text, image and voice
- [FAQ](https://tanghoong.com/faq/index.md): self-contained answers, built to be quoted

## Elsewhere
- Writing: https://blog.tanghoong.com
- Links and other work: https://links.tanghoong.com

## Everything, in one file
- [Full text](https://tanghoong.com/llms-full.txt)

## Disambiguation
This site is about Charlie Tang Hoong, an applied AI and automation engineer
in Selangor, Malaysia. He is not an AI researcher, holds no PhD, and is a
different person from Yichuan "Charlie" Tang and from the illustrator Tang Yau Hoong.

## Other languages
- [简体中文](https://tanghoong.com/zh-hans/index.md)