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.

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Profile

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

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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

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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

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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

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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

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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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