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Constantly improving,

STARTERGATE / Hoseung Choi

Back-end Engineer

01 — About

I'm a backend engineer.
I build what you don't see.

I build programs that run on servers, and the programs that connect to them.

Stack

I build with TypeScript on Node.js, mainly using NestJS as the server framework. I work with MySQL-family databases both through raw queries and TypeORM, and have run Aurora MySQL migrations and operations, Redis/DynamoDB caching, and task distribution combining RabbitMQ and SQS in production.

Experience

I've worked on everything from a backend serving 750K MAU to a crawling system handling 5M jobs a day, four-tier database clusters, and infrastructure and internal networking spanning cloud and on-premise. Across about 9 years of development and 5 years 3 months in industry, I've built frontend, infrastructure, and CI/CD alongside backend work, and designed the architecture for several projects.

Cloud & Ops

I ran AWS as the primary cloud, mixing in GCP and Naver Cloud Platform as cost and needs required. I built and ran CI/CD with GitHub Actions, deployment logic with the AWS SDK, and monitoring with Sentry and Grafana wired into Slack.

Collaboration

Beyond my own team, I've worked with MSPs like Bespin Global, partners like SmartRo, PortOne, and Naver Shopping, onboarded merchants, and public institutions — a wide range of external collaboration and API integrations.

02 — Project Highlights

Project Highlights

startergate

See all projects →

03 — Technologies

Technologies

stackshare

Using

TypeScript

JavaScript

Node.js

NestJS

React

MySQL

MariaDB

Aurora MySQL

Redis

RabbitMQ

Elasticsearch

AWS

Docker

Learned / Used

Python

C++

Java

PHP

Express.js

Koa.js

Django

Django REST Framework

jQuery

MongoDB

Jest

Learning / Interested

Gatsby

Spring

04 — Experiences

Experiences

FETCHING Back-end Engineer

2020.12 ~ 2026.03 (5y 3mo)

Seongdong-gu, Seoul

I've worked across a wide range of systems — from building and operating a backend server supporting 750K MAU, to a crawling system handling 5 million records a day, to an admin covering everything from orders and commerce content management to accounting, as well as the infrastructure and internal network that run it all.

TypeScript

Node.js

NestJS

MySQL

Aurora MySQL

Redis

RabbitMQ

AWS

I took part in developing every product at the company — the internal admin, commerce, and product collection systems among them — and owned the architecture design from the ground up on several of them. I was also involved in operating everything I built: running databases efficiently and reliably under cost constraints, and setting up CI/CD myself, including automated builds and automated deployment to both AWS cloud and on-premise environments.

PeopleFund Company* Back-end Engineer (Internship)

2020.01 ~ 2020.02 (1mo)

Gangnam-gu, Seoul

Worked as a field trainee for one month during winter break of my second year of high school. Improved the account authentication middleware and refactored related features.

Python

Django

Education · Awards · ActivitiesSee them all on the TimelineTimeline →

05 — Links