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πŸ‘¨β€πŸŽ“
Study Hard
πŸ‘¨β€πŸŽ“
Study Hard
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Achievement: Pair ExtraordinaireAchievement: QuickdrawAchievement: YOLOAchievement: Pull Sharkx2

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Achievement: Pair ExtraordinaireAchievement: QuickdrawAchievement: YOLOAchievement: Pull Sharkx2

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Seongwonp/README.md
Seongwon Park β€” Backend Systems and Platform Engineering

Portfolio LinkedIn Velog Email

I build backend systems, then stay around to see how they behave.

FastAPI and Spring Boot are my usual tools.
I enjoy the part after β€œit works”: deployment, load testing, failure analysis, and the next iteration.

λ§Œλ“€κ³  끝내기보닀, 직접 μš΄μ˜ν•˜κ³  μΈ‘μ •ν•˜λ©΄μ„œ λ‹€μŒ κ°œμ„ μ μ„ μ°ΎμŠ΅λ‹ˆλ‹€.


01 / WHAT I BUILD

πŸš— Streaming systems

MQTT, Kafka, time-series storage, consumer design, and load tests that check the final stored resultβ€”not just queue health.

πŸ“„ Deterministic pipelines

Parsers, layout engines, stable IDs, snapshot tests, and one-way data flows with explicit layer boundaries.

πŸ” Reliable web services

Authentication, payments, async workers, caching, monitoring, recovery paths, and security-conscious API design.

02 / SELECTED WORK

Telemetrix Β· Java

Vehicle telemetry platform built around MQTT β†’ Kafka β†’ storage and anomaly consumers.

load testing architecture decisions time-series data

Found a silent 50% data-loss bug and recovered storage throughput to 98.5% of target.

Han-Flow Β· TypeScript

Read-only macOS HWPX viewer with a one-way parser β†’ layout β†’ paint β†’ PDF pipeline.

parser boundaries deterministic IDs visual regression

The parser never knows React; the layout engine never knows ZIP or XML.

AI Exam Generator Β· Python

A deployed exam-generation service with payments, asynchronous workers, monitoring, and recovery paths.

FastAPI Redis workers service operations

Built the service, put it online, and stayed responsible for what happens when external APIs or workers fail.

Touch Bridge Β· Embedded / Python

Accessible IoT interface that helps visually impaired users operate existing home appliances through voice commands.

Flutter FastAPI Raspberry Pi / ESP32

Connected an accessible mobile interface to physical appliance control without requiring users to replace their existing devices.
More things I have built
  • No-Click β€” AI-assisted review analysis for promotional content and missing drawbacks
  • HoneyRest β€” a booking platform split across user, host, and admin applications
  • AIDA β€” a training-data quality experiment using KITTI, YOLOv8, and 13 injected error conditions
  • C Data Structures β€” lists, stacks, queues, AVL trees, graphs, hash tables, tries, and sorting algorithms implemented in C
  • Linux C System Programming β€” files, processes, memory, signals, sockets, pthreads, and IPC

03 / TOOLBOX

Languages & backend

Java Python C Spring Boot FastAPI

C foundations: pointers and dynamic memory, data structures, and Linux system programming with processes, signals, sockets, pthreads, and IPC.

Data & messaging

PostgreSQL Redis Kafka MQTT InfluxDB

Build, ship & observe

Docker Linux Nginx Prometheus Grafana

04 / GITHUB IN MOTION

Seongwon's GitHub activity stats Languages across Seongwon's repositories
Seongwon's GitHub contribution timeline
How the language card is calculated honeyRest_host is excluded because it vendors about 11.4 MB of third-party JavaScript libraries under its static assets. The chart weights both code size and repository count; it shows repository composition, not a proficiency score.

05 / RIGHT NOW

studying       Information Security @ University of Suwon
measuring      telemetry throughput, stored-data integrity, and query bottlenecks
building       a deterministic HWPX rendering pipeline
learning       where backend design meets security, IoT, and product operations

Good systems are not just built. They are observed.

If you want to talk about backend systems, strange bugs, or an ambitious project:

Say hello

Pinned Loading

  1. honeyRest_user honeyRest_user Public

    🐝 HoneyRest 감성 μˆ™μ†Œ μ˜ˆμ•½ ν”Œλž«νΌ | μ‚¬μš©μž(User) μ‹œμŠ€ν…œ (Spring Boot + React + Redis + Firebase)

    Java 1

  2. AI-ExamGenerator AI-ExamGenerator Public

    AI-powered exam generation from source PDFs Β· PDF 뢄석뢀터 검증 κ°€λŠ₯ν•œ μ‹œν—˜μ§€ 좜λ ₯κΉŒμ§€

    JavaScript 1

  3. touch_bridge touch_bridge Public

    μ‹œκ°μž₯애인을 μœ„ν•œ κ°€μ „ ν„°μΉ˜νŒ¨λ“œ μ ‘κ·Όμ„± μ†”λ£¨μ…˜ β€” 슀마트폰 μŒμ„± λͺ…λ ΉμœΌλ‘œ κ°€μ „ λ²„νŠΌμ„ λŒ€μ‹  λˆŒλŸ¬μ£ΌλŠ” IoT ν•˜λ“œμ›¨μ–΄ μ œμ–΄ μ•±

    Dart 3

  4. vehicle-telemetry-platform vehicle-telemetry-platform Public

    Real-time vehicle telemetry collection & monitoring platform. Features IoT data streaming via MQTT/Kafka, ML/Rule-based anomaly detection, and real-time visualization. Built with Spring Boot, Influ…

    Java 1 2