Michael Kohl

Rising Codementor

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ABOUT ME

Versatile IT professional with 15+ years experience in various fields

I’m Michael Kohl, generally known as citizen428 online. I started programming in BASIC on my Commodore 64 and am lucky enough that I could turn my hobby into a career: over the years I worked as systems engineer, software developer, penetration tester, CTO and IT journalist. I’m currently self-employed, so if you have an interesting project to talk about, please contact me at citizen428 at omg dot lol.

I’m also very interested in community building. I previously ran the Lambdaheads functional programming user group in Vienna, and am currently involved in Bangkok.rb, RubyConf Thailand, as well as PyCon Thailand.

German, Spanish, English

Bangkok (+07:00)

Joined October 2013

EXPERTISE

Ruby

18 years experience

Ruby since 2004. First contact with Rails at version 0.5 in 2005. Worked professionally with Rails since 2010. Lead several teams of Rail...

Ruby since 2004. First contact with Rails at version 0.5 in 2005. Worked professionally with Rails since 2010. Lead several teams of Rails developers and was CTO of a Rails-focused consulting company.

Ruby on Rails

Server

18 years experience

Linux user since 2000 or so. Gentoo Linux developer from 2004-2006. Worked as Linux consultant (HA, storage). Worked as systems engineer ...

Linux user since 2000 or so. Gentoo Linux developer from 2004-2006. Worked as Linux consultant (HA, storage). Worked as systems engineer (Puppet etc).

Linux

Git

9 years experience

Using git on a daily basis for several years at work. Comfortable with standard workflow, but there's so much more to it...

AWS (Amazon Web Services)

5 years experience

Amazon EC2

Clojure

5 years experience

Got interested in Clojure in late 2008. Taught different Clojure courses on Rubylearning.org (Clojure for Beginners and Clojure 101). Nev...

Got interested in Clojure in late 2008. Taught different Clojure courses on Rubylearning.org (Clojure for Beginners and Clojure 101). Never worked professionally with the language.

HTML/CSS

15 years experience

Wrote my first HTML in the late 90s. Know enough CSS to be dangerous.

Ruby on Rails

10 years experience

REVIEWS FROM CLIENTS

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SOCIAL PRESENCE

GitHub

methodfinder

A Smalltalk like Method Finder for Ruby. This is a mirror of the main repository on Sourcehub.

Ruby

265

unsavory-legacy

Removes outdated links from your Pinboard bookmarks

Ruby

Stack Overflow

61327 Reputation

121

145

Community Posts

Exploring foreign data wrappers in Postgres

For many years now Postgres has been my database of choice, but I still regularly find new and interesting features that I wasn’t yet aware of. The latest entry in this long list are “foreign data...

Git Tutorial: 10 Common Git Problems and How to Fix Them

10 most common Git tricks you should know about!

Quick Tips

What's my user agent when I parse website with rvest package in R?

I used https://httpbin.org/user-agent to find out: library(rvest) se <- html_session( "https://httpbin.org/user-agent"...

EMPLOYMENTS

Tech Lead

Gojek Financial Services

2018-10-01-Present

Taking Gojek's first financial services offering from prototype to live product with several hundred thousand users.

Ruby

Java

Kubernetes

Ruby

Java

Kubernetes

Terraform

Go (Golang)

Senior Lead Engineer

dev.to / Forem.com

2020-01-01-2022-02-01

IC as well as team management and mentoring

Ruby on Rails

PostgreSQL

React

Ruby on Rails

PostgreSQL

React

CTO

Lockstep Labs

2017-04-01-2018-10-01

Delivering high quality software by ensuring that our team of ~15 developers followed industry best practices across our whole technology...

Delivering high quality software by ensuring that our team of ~15 developers followed industry best practices across our whole technology stack and by providing continuous mentoring and other learning opportunities.

Ruby

Python

Ruby on Rails

Ruby

Python

Ruby on Rails

Heroku

RSpec

TypeScript

React

Protractor

JavaScript

React Native