Apps, Backend Cloud
Technical Domains
+
Years of Experience
Multiple Markets experience
(KR · JP · AU)
+
Focus on Reliability & Performance
My Experience
Navigating diverse environments with adaptability and expertise for holistic solutions.
Laon People
Tech Firm
2024 - 2025
Software Engineer
• Enhanced real-time swing feedback accuracy for the SwingEZ AI golf swing analysis app by integrating YOLOv5 and custom machine learning models. • Improved ML inference latency by optimizing model loading and tuning pipeline throughput on edge devices.
Freelance
Tech Firm
2023 - 2024
iOS Developer
• Built a child safety iOS app using iBeacon and Bluetooth Low Energy (BLE) to detect proximity and trigger alerts, supporting real-time location sharing and abduction prevention features. • Integrated native iOS background services and push notifications for continuous monitoring with minimal battery impact.
Peluvis Inc.
Tech Start-up
2022 - 2023
Full Stack Developer
• Led backend development for a logistics tracking system leveraging the Sigfox protocol, contributing to the system architecture, database design, and integration with legacy services for a successful product launch • Built a CI/CD pipeline using Jenkins and Docker to automate testing and deployment, improving team delivery speed by 40%. • Integrated location tracking into the MRPS employee management app and developed a high-throughput backend platform using a multi- language stack (Python, Java, Redis), enhancing scalability and location control precision.
Freelance
Tech Start-up
2022
iOS Developer
• Developed a SwiftUI-based iOS module utilizing NTRIP protocol to enhance GNSS accuracy for golf range applications, enabling real-time centimeter-level positioning. • Designed the interface for seamless integration with the existing app, improving user satisfaction through intuitive UX.
HANCOM Robotics Co.
Robotics Firm
2021
Full Stack Developer
• Led backend development for the AI Home Robot service platform using Kotlin, Spring Boot, MySQL, Docker, and Kubernetes, enabling stable service for thousands of connected devices. • Created a custom Serial Communication Library to ensure seamless interaction between the robot and IoT peripherals, improving reliability for autonomous navigation and obstacle avoidance features.
UD Tech Service Co., Ltd
Tech Firm
2017 - 2021
Full Stack Developer
• Reduced image loading time in Kia Motors' insurance management system from 90+ seconds to under 10 seconds by optimizing image rendering and data transmission, significantly improving user experience and operational efficiency. • Developed and maintained Q-Friends mobile app (2M+ downloads), overseeing data migration and managing service shutdown with zero critical incidents. • Built and deployed Kia Motors' Next-Generation Vehicle Management System and Red Sams App using Java, PL/SQL, and Oracle DB, streamlining inter-departmental workflows across inventory, sales, and maintenance.
What I Build
Building reliable, scalable systems that power real-world applications across mobile, backend, cloud, and network environments.
Featured Projects
What I’ve built, how I built it, and why it works
