Software engineer focused on problem-solving and the completeness of services without limiting tech stack. Actively contributes from the planning stage to prioritize user convenience. Currently responsible for the overall billing and user-side services across multiple MSA environments.
Experience
LG Uplus VoltUp
Sep 2024 — PresentTech Innovation Tribe, Back-end
Billing — Payment & arrears reliability (DLQ, recovery batches) Promotions — Coupon & point platform for user retention User-Side — Vehicle lookup, PnC auth, backend & Flutter app Internal AI — Agent routing & automated log diagnosis DX Infra — CI/CD integration & auto-doc tooling
Kakao Style
Jun 2022 — Sep 2024Pricing System, Back-end
Final pricing service, product matching, Zigzag membership new development and migration, and shopping EP integrations (Naver Shopping / Google Shopping). Pipelines for external price collection and competitive position automation.
Storelink
Mar 2021 — Jun 2022R&D Engineer
Product-data collection and keyword-ranking analysis platform Developed AdLink, Uzzit, Pugshop, and Friday
Whatap Labs
Mar 2019 — Mar 2021Front-end Engineer
Frontend development for monitoring dashboards across infrastructure, JVM applications, and Kubernetes.
Hamschout
Aug 2017 — Aug 2018SW Engineer
Developed the Itfluencer platform matching influencers with businesses.
OpenBridge
May 2016 — Jul 2017SW Engineer
Developed AlarmTalk (alarm + chat), Potion (photo editing + missions), and the OpenBridge web platform.
Projects — LGU+ VoltUp
Multi-Vendor Payment & Arrears Recovery
Oct 2024 — PresentLed payment architecture from scratch, expanding into a modular multi-vendor PG structure and a multi-tiered arrears recovery system for state consistency and automated failover.
Promotion Platform (Coupon & Point)
Coupon: Jul 2025 / Points: Aug 2025 — PresentBuilt a scalable coupon & point backend for B2B partners (Nexen, Toyota, Bluemembers) with coupon-pack payment restrictions across issuance, lookup, usage, and admin workflows.
U+ VIP Coupon
Jun 2026 — PresentIntegrated feapp, coupon-service, and admin-fe for monthly U+ VIP coupon issuance and created operational proxy tooling to resolve VoC bottlenecks.
User-Side Backend
Jul 2025 — PresentDeveloped core user-side backend features including KakaoT account/payment integration across 4 MSAs, PnC (Plug & Charge) auto-charge, and unpaid-charge monitoring.
VoltUp Hybrid App (Flutter - iOS/Android)
Dec 2024 — PresentLed Flutter hybrid delivery for 2.0; designed WebView-native bridge flows and core app paths such as QR scanning, permissions, push notifications, and forced updates.
VoltUp App Validation & Ops Correction Extension
May 2026 — PresentBuilt a Chrome Extension that recreates app-dependent flows in the browser to reduce app-attachment validation delays, then extends into replayable single-API operational corrections not supported by Admin.
Voltbot — Internal Agent Platform
May 2026 — PresentDeveloped Voltbot, an internal AI agent platform featuring intent-based agent routing (Voltbot Crew) and automated log diagnosis cross-checking GCP logs, guides, and GitHub code.
EV Charger Roaming Service (Ministry of Environment Network)
Feb 2026 — PresentRedesigned card-state management for the Ministry of Climate, Energy and Environment public roaming integration and added retry/monthly resync paths so baseline data can recover after missed events or transient failures.
Developer productivity & DevOps
Oct 2024 — PresentAI-first reviews, mobile CI/CD hardening, remote Gradle cache, iOS TestFlight automation, obfuscation policy, Firebase distribution, and internal Admin API standards.
Projects — Kakao Style (2022.06 — 2024.09)
Mobile IP Pool Proxy Infrastructure & Dynamic Pricing
Jan 2024 — Sep 2024Built a mobile IP pool proxy infrastructure to bypass crawling blocks and automated a dynamic pricing pipeline based on price competitiveness.
Internal/External Identical Product Matching
Feb 2024 — Sep 2024Overhauled 1:1 matching to an N:M structure to match identical products across all stores and types.
Final Pricing (Unified API for Service-Level Pricing Logic)
Dec 2023 — Sep 2024Unified scattered pricing logic into a single API so coupons, promotions, and other benefits follow one contract.
Membership & Mileage Migration
Apr 2023 — Jun 2023Redesigned membership tiers for retention and migrated the legacy membership service to Spring Boot.
Shopping Catalog Engine Page & Lowest-Price Updates (Naver Shopping / YouTube Shopping)
Jun 2022 — Sep 2024Enhanced price competitiveness of Zigzag products for exposure on Naver Shopping price comparison.
Projects — Earlier experience
Backend development for commerce keyword analytics service.
Developed integrated monitoring dashboards to visualize data collected from various agents (App, Server, DB, Container).
Influencer platform
Aug 2017 — Aug 2018Developed an influencer marketing platform for campaign management and influencer matching.
Social alarm service combining alarms and chat for mutual wake-up calls.
Mission-based photo filter app where users earn points for printing photos.
Side Projects
Built a CLI & local Web media manager that scans media files, combining FFmpeg and LLM multimodal scene/voice analysis for smart file renaming, tag sidecar storage, and web UI file management.
Commit Map Personal Project
OngoingA map-based travel planning service built to share my travel plans and quickly draft route ideas.
A personal resume service that manages multilingual resumes and project portfolio pages from a single YAML source across multiple layouts, optimized for print and PDF output.
Other Activities
Kookmin SW-Centered University Mentor
Mar 2024 — PresentMentored students on SW architecture, problem-solving, and user flow optimization
[Mentor Profile]Codeit Backend Course Mock Interview Mentor
Sep, Dec 2025Technical and mock interview mentoring for backend bootcamp graduates
Kernel360 Backend Mentor (1st ~ 5th cohorts)
Dec 2023 — Aug 2025Guided collaboration-based enterprise problem-solving projects across 5 cohorts
Kakao Tech Campus Backend Mentor (2nd)
Jun 2024 — Aug 2024Mentored backend track project teams for 2nd Kakao Tech Campus
Hanyang ERICA SW Startup Lecture
Feb 2024Gave a lecture on "Effective Backend" for SW startup series
Boostcamp 8th Backend Mentor
Nov 2023 — Dec 2023Mentored two iOS service project teams for Boostcamp
Hanbit N MSA — Monitoring session
Dec 2023Led the 9th session on MSA Monitoring for Hanbit Media seminar
Boostcamp 7th~8th Backend Reviewer
Sep 2022 — Oct 2023Conducted campus meetings and code reviews for backend campers
UbuCon Korea 2023 Speaker
Sep 2023Presented on "Building a Development NAS using WSL"
SW University Joint Hackathon 2023 Mentor
Jun 2023Provided FE/BE technical mentoring and career counseling
[Mentor Profile]Programmers School JAVA Mentor (11th)
Mar 2023 — Apr 2023Provided Q&A, code reviews, and video mentoring
Gyeongbuk SW High School React Lecture
Sep 2022 — Oct 2022Conducted React lectures and project guidance for high school students
Ubuntu Korea Community Infra Manager
Mar 2018 — May 2021Managed community infrastructure including Forum, Wiki, and mail servers
AngelHack 2020 Winner (Common Computer Prize)
2020Developed local group-buying platform LiBi; awarded Common Computer Prize
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