Selected as the first domestic insurtech to make it into the world's top 100, with 3.2 million cumulative app downloads, the No.1 insurtech startupService Team/Development Team Lead (Nov 2023 - Present)Developed new APIs for the admin serverMaintained and developed new APIs for Bomap/Planner serversResolved OutOfMemory issue in test code through context sharing, improving performance from 80 seconds to 35 secondsEnforced API documentation updates by adopting Spring Rest Docs (replacing Excel)Development Team/Backend Developer (Jul 2022 - Oct 2023)Resolved overall MyData integration failures, improving average performance from 300 seconds to 20 seconds (Link)Enhanced productivity by designing and implementing a multi-module structure for 6 serversImproved productivity by extracting common logic in test codes using TestFixtures (Link)Managed logs through Logback configuration (Link)Refactored legacy code for MyData token/list/detail inquiries and guarantee analysisProactively introduced tech seminars and internal study groups to improve development cultureUsed AOP for logging to understand the legacy APIs in use

A specialized company in planning, developing, operating, and servicing nano-satellite systems equipped with laser-based inter-satellite communication and ultra-high-resolution miniaturized electro-optical sensors, led by a distinguished research team with over 10 years of experience in domestic satellite development projects such as the Multi-purpose Practical Satellite (Arirang), Cheollian Satellite, and Next-Generation Medium Satellite.Image Science Research Team/Backend Developer (Feb 2022 - Jul 2022)Built servers and automated CI/CDEnhanced productivity and prevented errors by adopting a template pattern considering the addition of new document formatsConverted documents to PDF using Template Engine (Thymeleaf)(Link)Automated API documentation with 124 unit tests and Spring Rest DocsHandled authentication and authorization using Spring Security + JWTCrawled GOCI-II and Landsat satellite images using Python and Selenium

A startup offering English conversation services for intensive short-term learningDevelopment Team/Backend Developer (Apr 2021 - Jan 2022)Migrated from Java to KotlinBuilt servers and automated CI/CDIntegrated payment system using IamportAutomated documentation using SwaggerHandled authentication and authorization using Spring Security + JWTDeveloped all APIs required for the mentoring service (reservation, schedule, payment, refund, mentor page, etc.)Developed all APIs required for the English lecture service (video viewing permissions, payment, refund, etc.)