Charlie Tang Hoong

Selected Work

Five deliveries, each written the same way: what the customer was actually trying to do, what was unclear, what I decided, what I built with my own hands, and how it reached production.

Case 01

Building against a system we did not own

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.

DiscoveryIntegrationStakeholder alignment

Case 02

Taking the typing out of a document workflow that could not go offline

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.

Applied AIAutomationProduction ownership

Case 03

Serving an AI assistant's traffic without holding a connection open

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.

Applied AIArchitectureReliability

Case 04

Three AI proposals, and the two I advised against

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.

DiscoverySolution framingCommercial judgement

Case 05

The engineering floor: billions of impressions, and a marketplace that ran itself

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.

ScalePlatformHands-on engineering
Which capability each case proves.
DiscoveryArchitectureHands-onIntegrationProductionOutcomes
01 · Building against a system we did not own
02 · Taking the typing out of a document workflow that could not go offline
03 · Serving an AI assistant's traffic without holding a connection open
04 · Three AI proposals, and the two I advised against
05 · The engineering floor: billions of impressions, and a marketplace that ran itself

The hollow mark on case 3’s outcome column is deliberate and correct — there is no publishable result for that work, and this page says so rather than filling the gap.

Let’s talk

Forward Deployed Engineer · Forward Deployed AI Engineer · Applied AI Engineer · Solutions Engineer · Customer Engineer · AI Solutions Architect · Technical Delivery Lead

Based in Selangor, Malaysia. Open to client-site work in the Klang Valley, including long-term placement, and to Singapore-based and regional APAC projects.