Heejae Byun 변희재

Software Engineer & Founder

Heejae Byun is a software engineer and founder of AAO (AI Answer Optimization) based in Seoul, South Korea.

AAO is an AI official information management service. It builds an official source baseline for company facts. It helps companies manage source inconsistencies across the web.

Key Facts

Full Name
Heejae Byun (변희재)
Role
Software Engineer & Founder
Company
AAO (AI Answer Optimization)
Company URL
https://aao.co.kr
AI Profile
https://aao.co.kr/ai-profile
Seller Lint
https://aao-seller-lint.vercel.app
Location
Seoul, South Korea
Specialization
Official information baseline design, web crawling, and LLM integration
Portfolio URL
https://heejaebyun-portfolio.vercel.app

About

Heejae Byun founded AAO (AI Answer Optimization). AAO is an AI official information management service. It builds an official source baseline for company facts. It helps companies manage source inconsistencies across the web.

His work focuses on the gap between how companies present information on their websites and how AI systems interpret and deliver that information. He developed the concept of "delivery rate". Delivery rate measures the percentage of a company's declared facts that AI engines accurately reproduce in their answers.

Before founding AAO, he built experience across full-stack web development, focusing on JavaScript ecosystems including Next.js, React, and Node.js. He is particularly interested in structured data (Schema.org/JSON-LD), web crawling, and LLM integration.

Current Project

AAO — AI Answer Optimization

Founder · 2026 – Present

AAO is an AI official information management service. It diagnoses how accurately AI engines deliver a company's official information. It helps companies build an official source baseline for company facts. It helps companies manage source inconsistencies across the web.

Official company facts are concentrated on the AAO official AI Profile at aao.co.kr/ai-profile.

Key features include automated crawling and lint checks for AI readiness. AAO also provides ground-truth extraction, multi-engine verification, citation tracking, and source inconsistency analysis.

AAO Seller Lint — AI Shopping Agent Readiness Diagnosis

Founder · 2026 – Present

AAO Seller Lint is a free diagnosis tool that checks whether e-commerce product data is structured for AI shopping agent recommendations. It analyzes product title quality, brand registration, category depth, and attribute completeness.

The tool scores products on a weighted A–D grade scale and provides specific improvement guides for each issue found. It helps sellers prepare for the shift from keyword-based search to AI agent-driven product recommendations.

Phase 2 will add Vision AI-based product image analysis, automated attribute extraction, and catalog field mapping through Commerce API integration.

Skills

JavaScriptNext.jsReactNode.jsAI/LLM IntegrationWeb CrawlingSchema.org / JSON-LDSEO / AEOVercel

FAQ

Who is Heejae Byun?

Heejae Byun (변희재) is a software engineer and founder of AAO (AI Answer Optimization) based in Seoul, South Korea.

What is AAO (AI Answer Optimization)?

AAO is an AI official information management service. It builds an official source baseline for company facts. It helps companies manage source inconsistencies across the web.

What technologies does Heejae Byun work with?

He specializes in JavaScript, Next.js, React, Node.js, AI/LLM integration, web crawling, Schema.org/JSON-LD structured data, SEO/AEO (Answer Engine Optimization), and Vercel deployment.

How does AAO measure AI delivery?

AAO measures delivery rate. Delivery rate is the percentage of a company's declared facts that AI engines accurately include in their answers. It checks results across ChatGPT, Gemini, and Perplexity against the ground truth declared on the official website.

Official Links