Anna Joung

About me

Anna Joung

Anna Joung

Eight years shipping products in Seoul and Tokyo. 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 AI customer service platform · 250K+ business customers across 22 countries · Series D

First paid SMB tier 30% adoption, 10pp above benchmark 32 manual hours/month eliminated
What I didClose

Built the small-business AI freemium business from zero. After 30+ customer interviews, repositioned the offer from customer-service efficiency to revenue growth, packaged three revenue-driving AI products into one offering, and established product-market fit by converting the first free account into a $110-per-month paying customer.

Positioned the company's new AI analytics agent around YouTube trend analysis. Found small businesses' highest-demand use case by pre-selling a Claude Code prototype across 20+ sales calls, then shipped it to 30% adoption, 10 points above the internal benchmark.

Engineered the qualification branches and hallucination guardrails for the company's first AI sales agent pilot, with an e-signature SaaS company, replacing a lead-qualification process that converted at just 7%. The pilot established the benchmark for future pilots.

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

Founder & CEO · Valuelab
Mar 2024 – Jan 2026

Growth agency for startups · 10+ zero-to-one product and growth engagements

10x MoM sign-ups 3 → 1 conversion steps 2x leads at 80% lower CAC
What I didClose

Redesigned the user journey and product architecture for InAnswer, an AI EdTech startup — conversion steps from three to one, SKU portfolio from five to three, driving 10x month-over-month sign-up growth.

Spearheaded Japan market entry for Brandazine (YC W22), a creator marketing platform. Designed the localized go-to-market motion and a structured testing framework that doubled lead volume at 80% lower acquisition cost.

Growth Product Manager · Kakao Pay Securities
Sep 2022 – Jan 2024

Korea's leading fintech firm · over $2.8B in assets under management

$165M trading volume $19M inflows 50% of dormant users back, day one
What I didClose

Designed a tiered stock-transfer program through competitive analysis, generating $19M in inflows and $165M in trading volume that enabled management to advance acquisition discussions with U.S. brokerage Siebert Financial.

Launched a two-tier reactivation system. Behavioral analysis surfaced the milestones that predict retention; aligning eight cross-functional teams reactivated 50% of 10K dormant users on day one, at 80% retention.

Built the firm's first paid acquisition system, running 50+ structured tests to acquire 60K users at $0.8 CAC (20% below target) and codifying the channel allocation framework the team adopted as standard.

Growth Manager · LINE PLUS / LINE Corp.
Apr 2018 – Aug 2022

Global messaging platform · 220M+ monthly active users · Seoul and Tokyo

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

Pioneered the Japan launch of OpenChat, LINE's anonymous messaging app. 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 competitive benchmarking and 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 referrals — eliminating landing pages lifted conversion 26% and cut three ops hours per week.

My story

Eight years scaling products. Now I build my own.

3M+
monthly users for OpenChat JapanLINE
$165M
trading volume from one incentive programKakao Pay Securities
10x
month-over-month sign-up growthValuelab · InAnswer
30%
adoption for a new AI agent use case, 10pp above benchmarkChannel 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 consultancy, 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 built the company's small-business AI freemium business and converted its first paying customer.

Cover of the book 미국주식 처음공부

Scale is also why I write. I co-authored a book on U.S. stock investing for Korean readers in their twenties — 60K+ readers across Korea and Taiwan, twenty printings over six years. 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.

The Undertone interview report: a headline verdict, recommended actions, and each answer with its recording and measured score.
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.

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.

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.