Available to hire
Backend-focused Senior Software Engineer with 10+ years of experience building and maintaining enterprise web applications and logistics systems. Strong expertise in Java/Spring Boot, PostgreSQL, Kafka, Redis, and scalable service design for warehousing and logistics workflows.
Experienced in system integration, database optimization, and platform modernization, including migrations from legacy platforms to modern web stacks and collaborative projects with overseas partners. Available for remote contract and freelance work worldwide.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Beginner
Language
Korean
Fluent
English
Advanced
Work Experience
Senior Backend Engineer (LMS/SRM Development) at Makevalley
January 1, 2026 - PresentDeveloped LMS and SRM features. Contributed to learning/service modules and related backend implementations for business workflows.
Senior Software Engineer at DPLUX C&C / Kumho Tire Internal Platform
October 1, 2024 - December 31, 2025Maintained and enhanced enterprise employee portal systems. Improved operational efficiency through UI and business-process enhancements. Developed and maintained backend business logic and database integrations.
Full-Stack Engineer at YBM TOEIC
October 1, 2024 - December 31, 2025Re-engineered a legacy Windows desktop TOEIC testing application (WinForms/MFC) into a modern web-based testing platform.
Full-Stack Engineer at YBM COS Pro
October 1, 2024 - December 31, 2025Added TypeScript and JavaScript exam environments to an existing assessment system. Modularized feature logic to support multilingual versions (e.g., for Vietnam). Built and improved code conversion tools (e.g., C to Java) and enhanced the automated grading engine including partial scoring logic. Fixed infinite loop issues during exam sessions using request timeout controls on the web server.
Full-Stack Engineer at Redcap Tour
October 1, 2024 - December 31, 2025Developed and maintained a closed corporate shopping mall for employees. Implemented frontend/application logic independently while performing database operations through the company back-office internal system.
Backend Engineer at Kumho Tire
October 1, 2024 - December 31, 2025Managed internal system improvements and maintenance for an LMS context. Built evaluation and equipment-related management capabilities and developed interactive dashboards from evaluated data.
Backend Engineer at 디플럭스씨앤씨
October 1, 2024 - December 31, 2025Developed and maintained LMS features, including management modules for facility specifications and equipment tracking, and evaluation management per equipment item. Designed interactive dashboard screens based on evaluation data. Also maintained a closed corporate shopping mall, handled frontend/application logic, and integrated with internal back-office systems for data operations.
Full Stack Engineer (Freelance Contractor) at Consplay
May 1, 2023 - September 30, 2024Designed and developed a logistics management platform. Built backend services with Spring Boot, created frontend applications with Angular, and designed PostgreSQL databases. Developed PDA applications using React Native. Implemented Kafka CDC for database synchronization, centralized logging using ELK stack, and Redis caching to reduce database load. Configured Spring Cloud Bus for zero-downtime deployment strategy.
Full-Stack Engineer at 컨씨플레이
May 1, 2023 - September 30, 2024Developed frontend and backend systems for a logistics management system. Designed and built PostgreSQL databases. Built web frontend using AngularJS and mobile PDA applications using React Native. Implemented backend services with Java and Spring Boot. Established real-time DB-to-DB synchronization using Kafka CDC. Built an ELK pipeline for backend logging (Server Log → Kafka → Logstash → Elasticsearch → Kibana). Improved performance with Redis caching to reduce high-I/O operations. Integrated Spring Cloud Bus for zero-downtime configuration deployment.
Software Engineer at GC LabCell
May 1, 2020 - March 31, 2023Developed and maintained logistics management systems. Implemented warehouse operation workflows and supported system maintenance and operational improvements.
Software Engineer at 녹십자랩셀
May 1, 2020 - March 31, 2023Developed and maintained sales and settlement logic, clinical and lab testing logic, and logistics systems. Built and maintained PDA apps for PUD (Pick-Up & Delivery) drivers and Sales Managers, including location tracking and route management, and batch photo transmission. Automated data integration between clinical/testing shipments and logistics systems.
Software Engineer at Pyunghwa Dream
November 1, 2019 - April 30, 2020Developed warehouse outbound process systems. Implemented integrations between PIS and WMS platforms and supported logistics process automation.
Backend / Integration Engineer at 평화드림
November 1, 2019 - April 30, 2020Managed outbound warehouse logistics processes and developed systems. Built API interfaces to integrate PIS and WMS.
Backend / Integration Engineer at 신세계인터내셔날(Shinsegae International Inc.)
October 1, 2019 - November 30, 2019Improved WMS API interfaces for inbound, inventory, and outbound operations.
Cloud QA & Automation Engineer (Contract) at Naver Business Platform
August 1, 2017 - October 31, 2019Performed UI/UX testing for cloud products and validated features. Developed API automation testing tools and identified product improvement opportunities.
UI/UX Testing & Automation Developer at 네이버클라우드(NAVER Cloud)
August 1, 2017 - October 31, 2019Conducted web UI/UX testing, verified key product features, and produced actionable recommendations. Developed automated API testing tools.
QA / UI Automation Developer at Naver Cloud Platform
August 1, 2017 - October 31, 2019Performed UI/UX testing and implemented automated API testing.
Web Developer at ePASS Co., Ltd.
March 1, 2016 - July 31, 2017Maintained PHP-based web applications and developed automation tools for data collection and processing. Enhanced electronic journal services and improved database and application performance.
Software Developer at 이패스(주)
March 1, 2016 - July 31, 2017Extracted scripts for search functionality, maintained and updated PHP-based systems and databases, and processed e-journal data. Enhanced and added features to e-journal viewing interfaces and built automation programs for e-journal data management and maintenance workflows.
Android Developer at (주)에어
May 1, 2015 - August 31, 2015Designed, built, and developed Android applications. Implemented Bluetooth communication between Android apps and fine dust monitoring devices.
Education
Associate Degree, Computer Information at 수원과학대학
March 1, 2009 - February 28, 2015Associate Degree at Suwon Science College
January 11, 2030 - January 1, 2015Qualifications
Pro Certification Platform (COS Pro)
January 11, 2030 - August 4, 2026Industry Experience
Software & Internet, Education, Transportation & Logistics, Retail, Healthcare, Professional Services
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Beginner
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