JungHyun Ryu
Cloud Solutions Architect / Backend Developer
Uijeongbu-si,41
Summary
Every architecture decision I make is guided by two key questions:
“What truly needs to be done?” and “What does the user genuinely want?”
With over 16 years of experience in backend development and cloud architecture, I design solutions that are resilient, scalable, observable, and ready for change.
My approach emphasizes automation over repetition, fault-tolerance over assumptions, and clarity over complexity.
I believe a system should not just run — it should be able to recover, adapt, and evolve.
“Functionality is not the end goal. Creating value through thoughtful architecture and meaningful user experiences is.”
Overview
7
7
years of professional experience
2
2
Certifications
Work History
Solutions Architect /R&D Group Leader
ShareValue Co., Ltd.
11.2024 - Current
- Developed and maintained SmartBooking engine (Amadeus, Galileo, TOPAS).
- Architected scalable SaaS travel solutions for 40+ clients.
- Automated IaC with AWS CloudFormation and Serverless.
- Implemented centralized logging, monitoring, and alerting using Prometheus, Grafana, YACE.
Solutions Architect /R&D Group Leader
BYYJ Co., Ltd.
11.2023 - 11.2024
- Built fashion e-commerce platform infrastructure and backend system.
- Refactored legacy monolith to MVC frameworks with API split.
- Improved video delivery system with S3 + MediaConvert + CloudFront
Enterprise Cloud Architect (Finance Sector)
Bespin Global
07.2022 - 08.2023
- Designed mission-critical systems for major finance clients (Hyundai Card, NH Investment, Samsung).
- Built MyData, Big Data, and HPC platforms with AWS/OCI.
- Applied strict security and DR configurations for sensitive workloads.
General Manager /Backend Developer
Tour Marketing Korea (Subsidiary of HANA TOUR)
06.2018 - 06.2022
- Led backend and infrastructure modernization for OTA platforms of global brands including Royal Caribbean Cruises and Enterprise Rent-A-Car (Alamo, National, Enterprise).
- Re-architected legacy infrastructure and executed full cloud migration from KT Cloud to AWS.
- Integrated responsive frontend and adopted CodeIgniter framework for modular development.
- Established CI/CD pipelines using Jenkins, AWS CodeDeploy, and S3; implemented APM tools.
- Created internal development guidelines: code review, API naming rules, inter-service communication standards.
- Achieved infrastructure cost reduction through DevOps automation and monitoring optimization.
Education
Bachelor of Science - Computer Systems Engineering
Hansung University
Seoul, South Korea 04.2001 -
Skills
AWS Solutions Architect, Application Architect
System Automation & Cost Optimization
Web programming
SOAP and restful web services
Database programming
CI/CD Pipeline (GitHub Actions, Jenkins, AWS CodeDeploy)
MySQL, PostgreSQL, MongoDB performance tuning & modeling
Observability (Prometheus, Grafana, YACE, Whatap)
Certification
AWS Certified Solutions Architect – Professional
Timeline
Solutions Architect /R&D Group Leader
ShareValue Co., Ltd.
11.2024 - Current
Solutions Architect /R&D Group Leader
BYYJ Co., Ltd.
11.2023 - 11.2024
AWS Certified Solutions Architect – Professional
10-2022
Enterprise Cloud Architect (Finance Sector)
Bespin Global
07.2022 - 08.2023
General Manager /Backend Developer
Tour Marketing Korea (Subsidiary of HANA TOUR)
06.2018 - 06.2022
Information Processing Engineer (Korea Industrial HR Corp.)
12-2007
Bachelor of Science - Computer Systems Engineering
Hansung University
04.2001 -
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