Making cool stuff with AI & marketing

I'm Roméo — a French marketer living in Taiwan, obsessed with AI apps, matcha, and telling stories that actually connect with people.

🤖 AI Product Marketing 📈 Growth 🔍 SEO Nerd 🍵 Matcha Founder ✍️ Blogger since '09
👨‍💻

Roméo Arnault

Product Marketer @ PicCollage

📍 Taipei, Taiwan · Originally from France 🥐

A little bit about me

The tldr; version of my journey

By the numbers

16+
years in digital
11
active websites
4
countries lived
1
book published
🌏

My journey so far

Started blogging at 13, now building AI apps in Taiwan. Life's weird and I love it.

🇫🇷 Born
🇯🇵 4 years
🇹🇼 Now

What I'm up to now

📱

Building AI apps at PicCollage

🍵

Running Maïdo Matcha

✍️

Still blogging after 16 years

🎯

What I do

Growth marketing for AI-powered mobile apps. Test, learn, iterate, repeat.

👨‍🏫

Teaching

6+ years teaching SEO & influence marketing at university. Sharing knowledge is my thing.

🛠️

Skills & tools

Things I actually know how to use

Meta Ads Apple Search Ads Snapchat Ads SEO ASO Content Strategy Go-to-Market A/B Testing WordPress Ahrefs Analytics

Where I've worked

A decade+ of building things

2024 — Now

Product Marketer - AI Apps

PicCollage · Taipei

Marketing AI-powered video & photo apps. Running ads on Meta, Apple, Snap. Building go-to-market strategies. Living the "always be learning" life.

2025 — Now

Founder

Maïdo Matcha

Bringing authentic Japanese matcha to France & Europe. Fresh powder canned 24h before shipping. A love letter to my years in Japan.

2022 — 2024

Head of Content & Global SEO Lead

RHINOSHIELD · Taipei

Led SEO for EMEA, APAC, and NOAM markets. Managed social media teams. Made phone cases show up on Google (it's harder than it sounds).

2020 — 2022

SEO & Affiliate Manager

IGLOOO Inc. · Kyoto

Ran SEO for Voyapon travel media in 5 languages. Helped tourists discover Japan through content that actually ranks.

2017 — 2024

Professor

Université Bordeaux Montaigne

Teaching SEO, influence marketing & fact-checking to university students. Even from 10,000km away when needed.

2009 — Now

Professional Blogger

Gronemo · 11 sites web

Started at 13. Still going. Tech, gaming, travel, food, Japan — if it's interesting, I write about it. This is where it all began.

Things I'm building

Current projects I'm excited about

📱
AI / Apps

PicCollage Explore

Marketing AI-powered mobile apps for video, photo & audio. Where creativity meets generative AI.

Visit picc.co →
🍵
E-commerce

Maïdo Matcha

Premium matcha from a family micro-producer in Japan. Fresh, authentic, and shipped with love to Europe.

Visit maidomatcha.com →
📝
Content

Blog Network

11 websites covering everything from tech to travel. Including MerciJapon.fr and MerciTaiwan.fr — 16+ years of writing.

Let's chat

Always down to talk about growth, AI, matcha, or whatever's on your mind. Don't be a stranger!