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Achievement: Pair Extraordinairex3Achievement: Pull Sharkx3Achievement: QuickdrawAchievement: YOLO

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@Employment-Study @ItWillBeNaming

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Sunro1994/readme.md

Gmail GitHub Blog

๐Ÿง  Who Am I

๊ฐ„ํ˜ธํ•™๊ณผ ์ถœ์‹  โ†’ ๋ฐฑ์—”๋“œ ์—”์ง€๋‹ˆ์–ด
"์™œ ์ด ๊ธฐ์ˆ ์ธ๊ฐ€"๋ฅผ ๋๊นŒ์ง€ ํŒŒ๊ณ ๋“œ๋Š” ์Šต๊ด€
์ฆ์ƒ โ†’ ์›์ธ โ†’ ํ•ด๊ฒฐ์˜ ๋ฐ์ดํ„ฐ ๊ธฐ๋ฐ˜ ํŠธ๋Ÿฌ๋ธ”์ŠˆํŒ…

๋น„์ „๊ณต์ž์˜€๊ธฐ์— ์˜คํžˆ๋ ค ๊ธฐ์ˆ ์˜ ๋ณธ์งˆ์„ ๋๊นŒ์ง€ ํŒŒ๊ณ ๋“œ๋Š” ์Šต๊ด€์ด ์ƒ๊ฒผ์Šต๋‹ˆ๋‹ค.
MSA ์ „ํ™˜ ยท Kafka ๊ธฐ๋ฐ˜ ๋ถ„์‚ฐ ์ฒ˜๋ฆฌ ยท ์„ฑ๋Šฅ ๊ฐœ์„ ์„ ํ•ต์‹ฌ ์—ญ๋Ÿ‰์œผ๋กœ ์‚ผ๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค.

โšก Performance Highlights

๋ฌธ์ œ ํ•ด๊ฒฐ ๊ฐœ์„ ์œจ
๋ถ„์‚ฐ ๋ฝ ๊ฒฝํ•ฉ (Redisson โ†’ Lua Script) ์ตœ๋Œ€ ์‘๋‹ต ์ง€์—ฐ 10s โ†’ 3s ๐Ÿš€ 66.7%โ†“
์™ธ๋ถ€ API ์ง€์—ฐ (Redis ์ด์ค‘ ์บ์‹œ ์ „๋žต) ์‘๋‹ต ์†๋„ 2,318ms โ†’ 14ms ๐Ÿš€ 99.4%โ†“
N+1 ์ฟผ๋ฆฌ (๋ฒŒํฌ ์กฐํšŒ + HashMap ์บ์‹œ) 5,000ms โ†’ 30ms ๐Ÿš€ 99.4%โ†“
Kafka Outbox ํŒจํ„ด ๋„์ž… 6,500๋ช… ๋™์‹œ ์š”์ฒญ ๋ฉ”์‹œ์ง€ ๋ฌด์†์‹ค ์ฒ˜๋ฆฌ โœ… ์›์ž์„ฑ ๋ณด์žฅ
DB ๊ฒฐ์ œ ํ…Œ์ด๋ธ” ์ •๊ทœํ™” (2๊ฐœ โ†’ 12๊ฐœ) ๊ด€๋ฆฌ์ž ์กฐํšŒ 1,320ms โ†’ 700ms ๐Ÿš€ 47%โ†“
Token Diet ์˜คํ”ˆ์†Œ์Šค ๊ฐœ๋ฐœ ํ”„๋กฌํ”„ํŠธ ํ† ํฐ 25,000๊ฐœ โ†’ 5,000๊ฐœ ๐Ÿš€ 80%โ†“

๐Ÿ›  Tech Stack

Backend

Java Spring Boot Spring Security Spring Batch Node.js NestJS Kotlin

Messaging & MSA

Kafka Spring Cloud OpenFeign

Database & Cache

PostgreSQL MySQL Redis Elasticsearch

DevOps & Infra

Docker AWS GitHub Actions Linux

Monitoring

Prometheus Grafana ELK Stack

๐Ÿš€ Featured Projects

๐ŸŽซ Earlybird-Ticket โ€” ์‹ค์‹œ๊ฐ„ ์˜ˆ๋งค ์‹œ์Šคํ…œ

BE 4๋ช… | ํ…Œํฌ๋ฆฌ๋” ยท Java ยท SpringBoot ยท Kafka ยท Redis ยท MSA

  • Outbox ํŒจํ„ด ๋„์ž…์œผ๋กœ Kafka ์ด์ค‘ ์“ฐ๊ธฐ ๋ฌธ์ œ ํ•ด๊ฒฐ โ†’ 6,500๋ช… ๋™์‹œ ์š”์ฒญ ๋ฉ”์‹œ์ง€ ๋ฌด์†์‹ค
  • Lua Script ๊ธฐ๋ฐ˜ ๋ถ„์‚ฐ ๋ฝ ์žฌ์„ค๊ณ„ โ†’ ์‘๋‹ต ์ง€์—ฐ 10s โ†’ 3s (66.7% ๊ฐœ์„ )
  • Prometheus + Grafana ๋ชจ๋‹ˆํ„ฐ๋ง ๋Œ€์‹œ๋ณด๋“œ ๊ตฌ์ถ• ๋ฐ ๋ณ‘๋ชฉ ํƒ์ƒ‰
๐Ÿ“Œ ํ•ด๊ฒฐํ•œ ๊ธฐ์ˆ  ๋ฌธ์ œ ๋ณด๊ธฐ
๋ฌธ์ œ ์›์ธ ํ•ด๊ฒฐ
Kafka ์›์ž์„ฑ ๊นจ์ง ์ด์ค‘ ์“ฐ๊ธฐ ๋ฌธ์ œ Outbox ํŒจํ„ด + DLQ
Consumer Lag ์ง€์—ฐ ํด๋ง ์ฃผ๊ธฐ / ํŒŒํ‹ฐ์…˜ ๋ถ€์กฑ ํด๋ง 500ms + ํŒŒํ‹ฐ์…˜ 30๊ฐœ
์ง๋ ฌํ™” ํƒ€์ž… ๋ถˆ์ผ์น˜ ๋‹จ์ผ ํƒ€์ž… ์ฒ˜๋ฆฌ ๊ตฌ์กฐ Event Dispatcher ์ „๋žต ํŒจํ„ด
๋ถ„์‚ฐ ๋ฝ ๊ฒฝํ•ฉ Redisson ์˜ค๋ฒ„ํ—ค๋“œ Lua Script ์›์ž์  ๋ช…๋ น

๐Ÿ“ฆ Owl-Express โ€” B2B ๋ฌผ๋ฅ˜ ๋ฐฐ์†ก ์‹œ์Šคํ…œ

BE 4๋ช… | ํ…Œํฌ๋ฆฌ๋” ยท Java ยท SpringBoot ยท Spring Cloud ยท Redis ยท ELK

  • ๋‹ค์ต์ŠคํŠธ๋ผ ์•Œ๊ณ ๋ฆฌ์ฆ˜ ์ง์ ‘ ๊ตฌํ˜„ โ†’ ํ—ˆ๋ธŒ-์Šคํฌํฌ ์ตœ๋‹จ ๊ฒฝ๋กœ ๊ณ„์‚ฐ
  • Redis ์ด์ค‘ ์บ์‹œ (Write Through + Cache Aside) โ†’ 2,318ms โ†’ 14ms (99.4% ๊ฐœ์„ )
  • N+1 ํ•ด๊ฒฐ โ†’ HashMap ์ธ๋ฉ”๋ชจ๋ฆฌ ์บ์‹œ๋กœ 5,000ms โ†’ 30ms (99.4% ๊ฐœ์„ )

๐Ÿ”ง save-your-token โ€” Claude Code ํ† ํฐ ์ ˆ์•ฝ ์˜คํ”ˆ์†Œ์Šค

1์ธ ๊ฐœ๋ฐœ ยท Python ยท Bash ยท JSONL

  • Claude Code ์„ธ์…˜ JSONL ํŒŒ์‹ฑ โ†’ ๋ช…๋ น์–ด๋ณ„ ํ† ํฐ ์‚ฌ์šฉ๋Ÿ‰ ์ง‘๊ณ„ ๋ฐ ๋ถ„๋ฅ˜
  • 4๊ฐ€์ง€ ํ›… ์ž๋™ํ™”: ReadOnce(์ค‘๋ณต ์ฝ๊ธฐ ์ฐจ๋‹จ) ยท prompt-lint(๊ณ ๋น„์šฉ ํŒจํ„ด ๊ฐ์ง€) ยท context-watch(์ž„๊ณ„๊ฐ’ ๊ฒฝ๊ณ ) ยท report-save(์ผ๋ณ„ ์Šค๋ƒ…์ƒท)
  • ํ† ํฐ ์†Œ๋ชจ 25,000๊ฐœ โ†’ 5,000๊ฐœ (80% ์ ˆ๊ฐ)

๐Ÿ’ผ Work Experience

Loword          2025.11 ~ 2026.03  โ”‚  Node.js ยท NestJS ยท PostgreSQL ยท ECS/ECR
                ๊ฒฐ์ œ ์‹œ์Šคํ…œ ์„ค๊ณ„ ยท 8๋งŒ๊ฑด ๋ฐ์ดํ„ฐ ๋งˆ์ด๊ทธ๋ ˆ์ด์…˜ ยท ํ…Œ์ด๋ธ” ์ •๊ทœํ™” (2โ†’12๊ฐœ)

The PAP (๋ฐ”๋กœ์ธํ„ด 13๊ธฐ)  2025.06 ~ 2025.07  โ”‚  Kotlin ยท Spring Boot ยท ElasticSearch
                ๋„ค์ด๋ฒ„ ์žํšŒ์‚ฌ ยท MSA ์žฅ์•  ์ „ํŒŒ ๋ฐฉ์ง€ ยท ์„œํ‚ท๋ธŒ๋ ˆ์ด์ปค ๋„์ž…

๐Ÿ“œ Certifications

SQLD ์ •๋ณด์ฒ˜๋ฆฌ๊ธฐ์‚ฌ ๋ฆฌ๋ˆ…์Šค๋งˆ์Šคํ„ฐ2๊ธ‰

๐Ÿ“Š GitHub Stats

GitHub Streak

๐Ÿ“ Tech Blog & Presentations

์ฃผ์ œ ๋งํฌ
๋ฐ์ดํ„ฐ ์‹ค์‹œ๊ฐ„ ๋™๊ธฐํ™” & Feature Flag ๐Ÿ”— ๋ณด๊ธฐ
์˜ฌ๋ฆฌ๋ธŒ์˜ ์‹ ๊ทœ ์žฌ๊ณ  ์‹œ์Šคํ…œ ๊ฐœ๋ฐœ ๐Ÿ”— ๋ณด๊ธฐ
Kafka์˜ ํ•œ๊ณ„์™€ Flink ํ™œ์šฉ ๐Ÿ”— ๋ณด๊ธฐ
Kafka ํŒŒํ‹ฐ์…˜ ํ• ๋‹น ์ „๋žต & MSK ๐Ÿ”— ๋ณด๊ธฐ
Toss ์ฆ๊ถŒ Kafka ๋ฐ์ดํ„ฐ์„ผํ„ฐ ์ด์ค‘ํ™” ๐Ÿ”— ๋ณด๊ธฐ

Pinned Loading

  1. Pupket/togedog-server Pupket/togedog-server Public

    ๋ฐ˜๋ ค๊ฒฌ ์‚ฐ์ฑ… ๋ฉ”์ดํŠธ ๋งค์นญ ์–ดํ”Œ '๊ฐ™์ด๊ฑท๊ฐœ'์˜ ์„œ๋ฒ„ ๋ ˆํฌ์ง€ํ† ๋ฆฌ์ž…๋‹ˆ๋‹ค.

    Java 1

  2. earlybird-ticket/backend earlybird-ticket/backend Public

    Java 1 1

  3. over-time-worker/backend over-time-worker/backend Public

    Java 1

  4. save-your-token save-your-token Public

    Shell