# Hyun Sung C.

> Software Engineer @ SoJo Spa Club

Location: New York City Metropolitan Area, United States
Profile: https://flows.cv/hyunsungc

I am a software engineer with experience building integrated hospitality platforms—
combining property management, point-of-sale, scheduling, and payment systems into 
unified solutions.

My core strength is backend development using TypeScript and Node.js, with a focus on
API design, performance optimization, and system reliability.

I have experience replacing inefficient or over-complex third-party solutions with
practical in-house systems, helping teams reduce operational friction and gain better
control over their workflows.

I value clear communication, thoughtful trade-offs, and building software that remains
understandable, reliable, and maintainable as systems grow.

## Work Experience
### Software Engineer II @ SoJo Spa Club
Jan 2024 – Present

### Software Engineer I @ SoJo Spa Club
Jan 2023 – Jan 2024 | United States
System Development
•Contributed to development of an all-in-one POS system, consolidating diverse functionalities into a unified platform
•Designed and engineered APIs for in-house tools to streamline order processing, employee management, and daily operations
•Redeveloped the front-end UI for reservation systems using modern frameworks, ensuring a seamless user booking experience
•Built a real-time calendar-based scheduling system with WebSocket, enabling efficient order management and team collaboration
•Implemented a rule engine–based campaign and coupon system to support configurable and scalable promotional workflows
Performance Optimization
•Improved high-demand endpoint response times by over 60% through code refactoring and database query optimization
•Resolved concurrency issues in the queue system, ensuring reliable, scalable operation under heavy traffic loads
•Optimized backend processes for reservation systems, reducing CPU usage on Azure-hosted MySQL
•Migrated critical workflows to efficient libraries, achieving faster and more reliable performance
Automation & Scalability
•Developed and automated key operational processes, including scheduled batching, customer notifications, and dynamic schedule generation, utilizing cron services and Azure Logic Apps
Payment Integration & Optimization
•Maintained and optimized integrations with third-party payment gateways, ensuring secure and seamless transaction processing
Deployment & Monitoring
•Managed CI/CD pipelines with GitHub Actions for deployment across local, staging, and production environments, ensuring consistent software delivery
•Monitored system performance using SEQ, proactively addressing potential issues to maintain system stability
System Support & Collaboration
•Conducted bug fixes across backend and frontend systems, ensuring efficient resolution of system issues
•Collaborated within cross-functional Agile teams to design and implement solutions aligned with evolving business needs


## Education
### Bachelor's in Economics and Studio Art
University at Albany

### Computer Software Engineering
Flatiron School


## Contact & Social
- LinkedIn: https://linkedin.com/in/chothechallengebreaker
- Website: http://thedevhyun.com/

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Source: https://flows.cv/hyunsungc
JSON Resume: https://flows.cv/hyunsungc/resume.json
Last updated: 2026-04-05