Yu-Cheng (Ethan) Keng

Technical Consultant | Expert in Retail Media Integrations & E-Commerce Ad Tech

About Me

Hi, I'm Yu-Cheng (Ethan) Keng - a technical consultant specializing in retail media integrations, e-commerce ad tech, and data migration. I'm currently a Sr. Technical Solutions Specialist at Criteo in Tokyo, and I've worked across Tokyo and Taipei. I'm fully trilingual in Japanese, Mandarin, and English, and fluent in Taiwanese.

Outside of work, I love building side projects, exploring AI tools, and playing chill-pop & folk guitar.

Areas of Expertise

Retail media integrations & e-commerce ad tech (APIs, troubleshooting, launch support)
Data migration & ETL (SQL transforms, validation, UAT support)
Cross-functional technical leadership (stakeholders, roadmap, delivery)
Software development & automation (Python, JavaScript)
Multilingual communication (Japanese, Mandarin, English; fluent Taiwanese)

Independent products

Things I build

Small, practical tools for clearer communication, faster writing, and less repetitive work.

Send feedback

Browser app Live

Always Skitch

Paste a screenshot, add bold arrows, boxes, text, steps, or blur, then copy the finished image. Freeform mode lets you arrange and annotate multiple images together.

No upload
No sign-in
Single image + Freeform

Open the app Try Freeform

Android app

AI Keyboard

Voice dictation with optional Gemini- and Groq-powered rewriting for clearer grammar, tone, and phrasing—right inside your keyboard.

View on Google Play Learn more

Chrome extension

Excalidraw Drive Sync

Save, organize, and automatically sync Excalidraw drawings with Google Drive.

Chrome Web Store Project guide

Chrome extension

AI Prompt Assistant

Turn rough ideas into stronger prompts and iterate faster across the AI tools you already use.

Chrome Web Store User guide

Get in Touch

For inquiries or collaboration opportunities, please reach out to me at: [email protected]