Portfolio · 2026

Multilingual AI, built and evaluated.

I design and ship AI products that work across languages — Portuguese, English, Japanese — and I evaluate where meaning breaks between them.

Shipped two live AI products from zero full-stack knowledge. One is still used daily by its owner.

Based in Miyazaki, Japan · Open to remote (JST/EU/US overlap).

Flagship project
Storefront
Dashboard
Live · used daily by the owner

Continue Love — Bilingual E-Commerce Storefront

A Traditional Chinese / English jewelry storefront with shopping cart, Instagram-based order flow, and a backend order dashboard — designed end-to-end including brand voice in both languages. Built with Lovable + custom logic.

Visit the live store
Flagship project
Flagship project · Shipped

Hana — Bilingual AI Bar Assistant

Built and deployed from zero full-stack knowledge in under a month.

01
Problem

At a Miyazaki hotel café-bar, international guests couldn't navigate Japanese-style cocktails and staff couldn't bridge every language.

02
Build

I designed, built, and deployed a bilingual (EN/JA) AI assistant: guests scanned a QR code, chatted naturally, and got drink recommendations with visual cards pulled from a live menu database.

03
Run & status

Ran in production at the hotel café-bar (March–April 2026). No longer deployed at the venue — the working app is live below, try it.

ReactTypeScriptSupabaseOpenAI API
Live walkthrough
How I work
01

Multilingual Service Operations

PT-BR · JP · ES · ZH-TW

Multilingual guest support

02

AI Quality & Evaluation

4+ years of LLM evaluation, MQM error taxonomy, SxS scoring, MTPE for Toloka, OneForma, Meridial AI.

Structured, rubric-driven quality judgment at scale.

03

AI Support Assistants & Workflow Automation

Support That Runs Itself

I design and ship AI assistants and automated workflows that handle repetitive customer questions — so small teams respond faster, in more languages, without adding headcount.

Hana shipped and demoable.

Available for select multilingual AI builds and evaluation work — get in touch.

About
Andrei Rocha in Miyazaki, Japan
Miyazaki, Japan
PT · EN · JA · ES · ZH-TW
Remote · JST / EU / US overlap

I'm Brazilian, based in Miyazaki. I'm a geographer who works across languages — Portuguese, English, Japanese, Spanish, and Traditional Chinese — and I've lived in Brazil, Japan, and Taiwan. My work has circled one thing the whole way: meaning, and the small ways it breaks between languages. That took me from translation desks to evaluating language models — writing rubrics, catching where meaning shifts — and to designing and shipping Hana, a bilingual AI assistant that ran in a real bar every night during its production window. It's also taking me back to where I started: the sea. My earliest research was on ocean governance and maritime disputes, and I'm now returning to it with a sharper question — how the values people hold for the ocean survive translation, and what gets lost when they don't. I care about the customer on the floor, the rubric on the page, and the instrument that measures what people actually value.

Contact

Let's build something that works across languages.

LinkedIn
linkedin.com/in/andreitartaroni
Location
Miyazaki, Japan · Remote-friendly · JST