About me

Anna Joung

Eight years shipping products in Korea and Japan. Now an MBA at Berkeley Haas, building with AI.

Work history

The short version. For the story behind each bullet, open the interactive resume.

MBA · UC Berkeley Haas

Class of 2028

Building with AI → see the builds

Product Manager · Channel Corp

Feb 2026 – Jul 2026

Korea's #1 enterprise conversational AI platform · 250K+ business customers across 22 countries · Series D

30% adoption at launch 32 manual hours/month eliminated First free user to $110/month

What I didClose

Owned the AI analytics agent, working directly with the CEO. Synthesized 30+ small-business interviews to redefine its scope around YouTube trend insights, then pre-sold a Claude Code prototype across 20+ sales calls, driving 30% adoption at launch.

Deployed a voice AI agent for Korea's leading commerce platform. Designed 20+ eval scenarios to pressure-test the prompts and drove three rounds of iteration with engineering, eliminating the client's 32 manual hours a month for customer support.

Defined packaging and monetization for a small-business AI offering. Repositioned it around revenue growth, the top need across 50+ interviews, and bundled three AI products into one package, converting the first free user to $110 per month.

The product ↗

Founder & CEO · Valuelab

Mar 2024 – Jan 2026

Fractional product and growth team for early-stage startups · 10+ zero-to-one engagements alongside founder-CEOs

2x leads at 80% lower cost per lead Revenue doubled in 3 months 10x MoM sign-ups

What I didClose

Spearheaded Japan market entry for Brandazine (YC W22). Designed a Meta Ads-to-Salesforce tracking pipeline and a lead-quality test framework in Korea, then applied them to double leads at 80% lower cost per lead.

Drove AI transformation for an online finance education startup. Automated the registration workflow with no-code tools to save 20+ hours a month and designed a trial-to-paid funnel that doubled revenue in three months.

Redesigned the purchase flow for an AI interview prep startup. Pinpointed checkout drop-off through Google Analytics and led engineering sprints to cut checkout from three steps to one, driving 10x month-over-month sign-up growth.

Growth Product Manager · Kakao Pay Securities

Sep 2022 – Jan 2024

Korea's leading fintech firm · over $15B in customer assets

10K dormant users reactivated $19M inflows $165M trading volume

What I didClose

Led an 8-team task force to build a two-tier rewards feature into the firm's recurring investments product, taking it from PRD to QA-tested launch after SQL analysis tied retention to the 1st and 10th purchase. It reactivated 10K dormant users.

Launched a stock transfer-in program for smaller retail investors, a group competitor research showed rivals overlooked. Built ledger logic with engineering to verify and track transfers, drawing $19M in inflows and $165M in trading volume.

Built an acquisition experimentation framework from scratch, defining CAC and LTV as success criteria and testing 50+ combinations across channel, message, and audience, tracked in Tableau. It acquired 60K users and became the team's playbook.

Kakao Pay Securities ↗

Growth Manager · LINE PLUS / LINE Corp.

Apr 2018 – Aug 2022

Global leading messaging platform, akin to WhatsApp · 220M+ monthly active users · South Korea and Japan

3M+ MAU, OpenChat Japan 100+ experiments +26% conversion

What I didClose

Pioneered the Japan launch of OpenChat, LINE's anonymous group-chat service. Ran 100+ experiments to scale it to 3M+ monthly active users, ranking it among LINE's global top three products by growth.

Architected an APAC localization playbook through gamified campaign testing, driving 13K users and 80% day-30 retention in Japan. LINE Indonesia adopted it as the regional go-to-market standard.

Rebuilt the sign-up flow after six months of user data showed 10% of sign-ups came from in-app recommendations — eliminating landing pages lifted conversion 26%.

OpenChat in the press ↗ LINE ↗

My story

Eight years scaling products. Now I build my own.

3M+

monthly users for OpenChat JapanLINE

$165M

trading volume from one stock transfer-in programKakao Pay Securities

10x

month-over-month sign-up growthValuelab

30%

adoption at launch for an AI analytics agentChannel Corp

I have spent my career taking products from small to large. At LINE I launched OpenChat in Japan and ran the experiments that scaled it past 3M monthly users. At Kakao Pay Securities I built the systems that brought dormant users back and moved $165M in trading volume. I ran my own fractional product and growth team, Valuelab, and took a YC-backed startup into the Japanese market from zero. Most recently, as a product manager on the AI Transformation team at Channel Corp, I owned the AI analytics agent and defined the packaging and monetization of a small-business AI offering.

Scale is also why I write. I co-authored a book on U.S. stock investing for Korean readers in their twenties — 60K+ copies sold across Korea and Taiwan. Making a hard subject plain enough that a beginner acts on it is the same problem as product: you are not simplifying the thing, you are removing what stands between the person and the thing.

I am now a first-year MBA at Berkeley Haas, and I have started building myself. Eight years of scaling products taught me what makes something grow. Building with AI is how I put that to work on my own ideas — the work is below.

Building with AI

What I am building with AI. I am deliberately mixing B2B and B2C, and rotating through agent design, evals, and the generative models I have not used yet. The goal is to learn the stack, not to grow users.

2026.09

Undertone

B2BAgentVoiceEval

A voice AI that interviews a customer and reads how they answered, not just what they said, by measuring each answer against that speaker's own baseline. Built in about three hours at a hackathon with three dependencies and no framework. What I got wrong is the part worth reading: I built the measurement and never tested the measurement.

Write-up → Live ↗ Code ↗

2026.09

Interactive resume

B2CClaude Code

My resume, where the key bullets open the story behind them: the problem, what I did, and the result. I planned it with a PRD and a task list, then built and shipped it with Claude Code in a day.

Open →

2026

Pre-selling a prototype

B2BClaude Code

At Channel Corp I built a Claude Code prototype and pre-sold it across 20+ sales calls to find the use case small businesses wanted most. Demand was validated by the customer, not by the roadmap.