Curriculum vitae

Jaekook
Ahn.

Software engineer.
Systems architect. Technology leader.

Explore my experience

Building systems. Connecting people.

From online game platforms to cloud infrastructure, I design and build services that work at scale.

Over two decades of hands-on engineering and technical leadership across Korea, Indonesia, and the United States.

Currently

Senior Software Engineer

Rakuten Symphony Korea

Seoul, Korea · Since Nov 2024
20+Years in technology
3Countries worked in
300kPeak concurrent users at PT. Kreon

01 / Career

Work
experience

Engineering, architecture,
and leadership since 2000.

2000 — PRESENT

Rakuten Symphony Korea Current

Senior Software Engineer

Designing internal products and guiding junior engineers.

Role & technologies
  • Guide junior engineers.
  • Design and develop internal products.

Technologies & tools

  • Go
  • VSCode
  • Git
  • Markdown

BoldPlayGames

Principal Architect

Game backend architecture, from authentication to matchmaking.

Projects & technologies
  • Design and develop game backend systems for authentication, users, matchmaking, and statistics.
  • Adopt and apply microservices architecture (MSA) and message queues (MQ).
  • Manage AWS and EKS infrastructure.

Technologies & tools

  • Go
  • AWS
  • EKS
  • Istio
  • PostgreSQL
  • MongoDB
  • Redis
  • Loki
  • Ubuntu
  • RESTful
  • WebSocket
  • Skaffold
  • VSCode
  • Git
  • Markdown

Neonesia

CTO & Founder

Cloud reload platforms and banking workflow automation.

Projects & technologies
  • Design and develop reload systems and a cloud reload platform.
  • Design and develop banking flow automation.
  • Manage GCP and GKE infrastructure.

Technologies & tools

  • Go
  • GCP
  • GKE
  • Kubernetes
  • Istio
  • PostgreSQL
  • Ubuntu
  • VSCode
  • Copilot

PT. Jiran Tech Indonesia

CEO & Founder

Sales and technical support for Jiran Group products.

Projects & responsibilities
  • Provide sales and technical support for Jiran Group products.
  • Support factory automation at PT. Parkland World Indonesia.
  • Enhance security at PT. Pratama Abadi Industri, a Nike partner.

Funbit

CEO & Founder

Bringing Korean drama and movie streaming to Indonesia.

Projects & technologies
  • Develop an online streaming service for Korean dramas and movies in Indonesia.

Technologies & tools

  • Go
  • ReactJS
  • GCP
  • PostgreSQL
  • CentOS

Smilegate Megaport

General Technical Manager

International technical projects and overseas branch support.

Projects & responsibilities
  • Support overseas branch offices and international technical projects.
  • Manage the network infrastructure department.
  • Work on an online messenger business for Folha Group in Brazil with Kakao.
  • Provide technical support to Smilegate North (Canada) and Smilegate SEA (Malaysia).
  • Research and report on the gaming industries in South America and Southeast Asia.

PT. Teracord

CEO

Building a company and leading business and technology operations.

Role & technologies
  • Build the company, manage the business, and resolve technical issues.

Technologies & tools

  • CentOS
  • PHP
  • Nginx
  • HAProxy

PT. Kreon

CTO

Large-scale online game infrastructure supporting 300,000 concurrent users.

Projects & technologies
  • Support OnAir, PointBlank, Atlantica, FreeStyle, LostSaga, and other online games.
  • Design and implement systems with a maximum of 300,000 concurrent users and 8 Gbps outbound traffic.
  • Lead what was, at the time, the only company in Indonesia capable of handling over 10 Gbps of traffic.
  • Design and implement networks and service servers.
  • Design core systems and manage their development, alongside web development.
  • Manage game service technical issues and security.

Technologies & tools

  • CentOS
  • Java
  • PHP
  • Nginx
  • HAProxy

SK Communications

Developer

Development for the Cyworld Town service.

Projects & technologies
  • Develop the Cyworld Town service.

Technologies & tools

  • ASP
  • .NET
  • Windows

OnNet USA

Developer

Online game launches and game portal development.

Projects & technologies
  • Launch Heroes in the Sky and Manga Fighter online.
  • Set up and manage DNS, email, mass mail, wiki, and game forums.
  • Develop a game portal.

Technologies & tools

  • Windows
  • CentOS
  • PHP
  • PowerDNS
  • Nginx

Yahoo Korea

Developer

Online game services, partner support, and Windows applications.

Projects & technologies
  • Launch and manage online game services.
  • Support partners with technical issues.
  • Manage security issues with Yahoo Inc.'s Paranoid team.
  • Develop Windows applications.

Technologies & tools

  • Windows
  • Linux
  • FreeBSD
  • ATL
  • MFC
  • MSSQL

Korea Game Development & Promotion Agency

Manager · Now KOCCA

Game quality evaluation and distributed computing research.

Projects, contributions & technologies
  • Provide game testing services for RF Online, Flype, and other titles.
  • Develop PC and online game quality evaluation systems using LoadRunner and CodeScroll.
  • Research and port IBM's Optimal Grid system at the IBM Almaden Research Center in San Jose.
  • Test the Raghaim MMORPG server for the Optimal Grid system.
  • Edit the Korea Game White Book, 2003 and 2004 editions.
  • Evaluate game venture companies.

Technologies & tools

  • Windows
  • Linux
  • LoadRunner
  • CodeScroll
  • IBM Optimal Grid

Tygem

Developer

Development of an online Baduk (Go) game system.

Projects & technologies
  • Develop an online Baduk (Go) game system.

Technologies & tools

  • MFC
  • MySQL

UNITEL

Developer · Now Samsung SDS

Messenger and real-time chat application development.

Projects & technologies
  • Develop Unitel Messenger using MFC.
  • Develop Samsung Electronics Anycallland chat using ATL, ActiveX, Pro*C, and C++.
  • Develop Weppy (www.weppy.com) chat using ATL, ActiveX, Pro*C, and C++.

Technologies & tools

  • Unix / Solaris
  • Windows NT
  • Windows
  • Oracle 8.0.5
  • MFC
  • ATL
  • ActiveX
  • Pro*C
  • C++

02 / Capabilities

Technical
expertise

From service design
to production infrastructure.

Service engineering

Online service design and development, with a focus on high-traffic service architecture.

Cloud & infrastructure

Cloud-based service development with GCP, AWS, Kubernetes, and microservices architecture.

Core languages

  • Go
  • SQL
  • Python

03 / Learning

Education &
certifications

GRADUATED 22 FEB 1999

Kangwon National University

Bachelor of Electronic Engineering

Full-time study

2013

Korean Language Teacher

Level 3 Certificate

2012 · MEDELLÍN, COLOMBIA

EAFIT

Spanish language studies

04 / Background

Personal data

Name
Jaekook Ahn
Date of birth
28 October 1973
Nationality
Korean
Sex
Male
Marital status
Single