Heechan Bak (CHANN)

Read this in other languages: 한국어(KR) 🇰🇷

Summary

Total over 7 years as a Software Engineer.
Automate recursive tasks to increase efficiency.
Fast adapting skills in new environments and build production grade application.
Production-experienced API and gRPC with Python, Golang, Node.js, etc.
Create sleek dashboard with React.js and MobX, Jotai, etc. from the bottom.
Savvy in building/operating container-based architecture, and hobby-experienced kubernetes.

Profile

Name : Heechan Bak
Address : Seoul
Language : Korean (Native), English (Limited Working Proficiency)

Experience

December and Company Inc. (2019.09 ~ Current, over 3y) - Backend Developer
- Fint API (Python, Django, Docker, etc.)
- Openbanking deposit batch, installment transfer batch, etc. (Python, Django, etc.)
- Electronic Signature for non-repudiation process. (Python with RSA Package)
- Backoffice Management Tool (Python, Django, Docker, React.js, etc.)
- Production-experienced in-app webview and deeplink development (Next.js, etc.)
OWDIN Network(Closed) (2018.01 ~ 2019.09, 1y 9m) - DApp and Backend Developer
- Blockchain based decentralized application development (DApp)
  - Ethereum, EOS, COSMOS Network
  - Experienced Smart Contract and DApp Development
  - 1st Prize in EOSYS DApp Contest
- IPFS Management Tool
  - Middleware file server built with golang and echo
  - Knowledge of distributed storage systems
  - Dropbox-like file/folder management dashboard
  - Upload files into ipfs cluster with pub-sub message queue
  - Tech stack : Golang, Echo, RabbitMQ, MySQL, React.js, MobX, Ant Design
- Backoffice Management Tool
  - Container-based microservice architecture and single page application
  - Tech stack : Golang, Node.js, MySQL, MongoDB, React.js, MobX, Ant Design
- CI/CD Automation with Docker Container
  - Up and running private docker registry and GitLab
  - Deploy production containers at scale into multiple IaaS
  - Test, build, deploy automation with docker container and private docker registry
- Stand-up Meeting Chatbot on Slack
  - Answer the simple question to chatbot
  - Switch to asynchronous daily meetings
LAWDY(Closed) (2017.05 ~ 2017.12, 7m) - Software Engineer and Founding member of legaltech startup
- Questionnaire-based standard legal contract generator
- Research blockchain for adopting notarization of a legal contract
- Tech stack : Django, Semantic UI, Docker, MySQL, Ethereum, etc.
Cafe24 (2016.08 ~ 2017.04, 9m) - Backend Developer
- Varnish Cache Checker
  - Read apache weblog and check static assets cached or not
  - Send alarm message to operations manager if assets does not cached
  - PHP(Code Igniter) and jQuery for frontend, python script for backend
- Autoscaling Server with Test Automation
  - Automate procedures of scale-out shopping mall servers
  - Send alarm message to operations manager if test has failed
  - PHP(Code Igniter) and jQuery for frontend, python and shell script for backend
- Server / Application Configuration Checker
  - Check apache congif, db config, etc. automatically
  - Send alarm message to operations manager if config is invalid
  - Python(Django) and jQuery for frontend, python, ansible for backend
NHN Entertainment 1st CodeCamp (2015.06 ~ 2015.08, 3m) - Bootcamp of newbie developer
- Frieday - Gamification service of ordering chicken (slide)

Personal Project

KUPLEZONE (2010.02 ~ 2016.12) - Korea University (Sejong) Online Service

Education

Degree

Korea University(Sejong) (2010.03 ~ 2017.02)
- B.E. in Computer and Information Science
Korea University(Seoul) (2012.03 ~ 2017.02)
- B.Sci. in Brain and Cognitive Science

Extra Courses

Seoul National University, Institute of Computer Technology (2014.07 ~ 2014.09)
- A course in Multicore Programming on supercomputer(Chundoong)
- Coursework: C, Linux, Pthread, OpenMP, OpenCL, MPI
Korea Productivity Center (2015.07 ~ 2015.08)
- A course in Wearable Device Programming(IoT)
- Coursework: Android, JSP, IoT, Server, API

Skills

Programming Language

Golang (Favored)
Python (Favored)
JavaScript
TypeScript

Frameworks and Libraries

Echo, xorm
Django, Flask
Express.js
React.js, MobX, Ant Design
Docker, Kubernetes
GitLab CI/CD, Jenkins
RabbitMQ, Redis
Terraform

DB

MariaDB (or MySQL)
PostgreSQL
MongoDB

Activities & Certificates

Production Machine Learning Systems - Coursera (2019-07)
End-to-End Machine Learning with TensorFlow on GCP - Coursera (2019-07)
Launching into Machine Learning - Coursera (2019-05)
Getting Started with Google Kubernetes Engine - Coursera (2019-04)
Machine Learning APIs - Google Qwiklabs (2019-02)
Kubernetes in Google Cloud - Google Qwiklabs (2019-01)
EOSYS DApp Contest 2018 - 1st Prize (2018-11)
Git and Github Instructor
OSS Dev Forum Hands on Lab Teaching Assistant
Djangogirls Seoul Coach (2017-06)
Pycon Korea (2016-10 ~ 2017-08)
Etc

Open Source Contributions

Pull Requests

Add: Add federated search and change header style #55 in planetarium/libplanet-explorer-frontend
Update: Support reverse order and show payer option - Fix #324 #464 in EOSIO/eosjs
Fix: Kakao OAuth Failure - Headers for authorization #171 in python-social-auth/social-core
Fix: Bithumb Bad Request(Auth Data) - Convert header value to string #1030 in ccxt/ccxt
Add: Bithumb Private API - Withdraw #1077 in ccxt/ccxt
Init: Entrance #99 in pythonkr/pyconkr-2017
Add: Language version and print output in one line #11 in Baekjoon/submit-tool
Update: Translate introduction in Korean #145 in tiimgreen/github-cheat-sheet

Maintained

cleos-zsh-completion - Auto-completion for cleos

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