Kim Wonwoong (WoongE)

Kim Wonwoong (WoongE)

10-Year Productivity Driven Developer maximizing Business Impact

Email: woong17@naver.com

"10-Year Productivity Driven Developer maximizing Business Impact."

Over the past 9+ years, I have experienced both handling large-scale traffic at Coupang and building 0-to-1 services with business pivots generating revenue at Doctornow.
I believe the ultimate goal of engineering lies not just in 'maximizing team productivity' but in 'business success'.
With the agile execution of startups and the stable design capabilities of large-scale platforms, I am an engineer who solves complex business problems through technical solutions and contributes to real revenue and growth.

Experience Highlights

Doctornow Japan (γƒ‰γ‚―γ‚ΏγƒΌγƒŠγ‚¦)

Doctornow
2024.01 ~ Present

Led Japan expansion 0β†’1. Achieved $100K+ monthly revenue through business pivot, 83% AWS cost reduction, AI Agent platform development.

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Doctornow Community Squad

Doctornow
2022.05 ~ 2023.12

Led new business 0 to 1. Achieved 2M MAU through SEO optimization and AI RAG-based content automation.

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Coupang Review Team

Coupang
2020.01 ~ 2022.05

Achieved GMV +1.04%, review submission rate +152% through 24 service experiments. 20x message consumption speed through Kafka optimization.

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Coupang FC & Transportation Data

Coupang
2017.01 ~ 2020.01

Built Rocket Install Open API Platform (Samsung, LG integration). Developed real-time delivery/return status dashboard.

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Skills

Technical Leadership & Architecture

  • Cost-aware Architecture: Avoiding over-engineering for startup environments, designing and operating optimal architectures suited to business stage
  • Commerce & Logistics Domain: Domain knowledge and system design capabilities across e-commerce and logistics including product/order/payment/delivery/returns
  • AI Engineering: Production feature implementation using Spring AI, RAG (pg-vector + Text Embedding), LLM Tooling

Backend Engineering

  • Language: Kotlin/Java (Primary), TypeScript (Admin), Go/Rust (Hobby)
  • Framework: Spring Boot Ecosystem (JPA, QueryDSL, Kotlin JDSL), GraphQL-Kotlin
  • Database & Storage: PostgreSQL (+ PostGIS, pg-vector), MySQL, Redis, ElasticSearch (OpenSearch)
  • Messaging & Event: Kafka (Coupang high-volume processing experience), Spring Event

Infra & DevOps

  • AWS: Sole builder and operator of entire Japan service infrastructure
  • CI/CD & Monitoring: Github Actions, Jenkins, DataDog (APM, Logging)

Frontend (For Admin/Internal Tools)

  • React, Next.js (Built Japan admin solo using AI coding tools)

Education

  • Sogang University, Bachelor's in Computer Science / Mathematics (2010.3 ~ 2017.2)