All about me as a developer and as a person.

Table of Contents:

• Ethan Kletschke
  • About Me
  • My Languages/Frameworks
  • Concepts I'm Familiar With
  • Concepts I'm Improving
  • What I'm Currently Learning

Heyo, I’m Ethan Kletschke! I'm a second-year Bachelor of Computer Science student at Emeris in Sandton, Johannesburg.

• I’m mostly interested in web development, but am well-versed in a wide variety of programming languages related to software and web apps.
  • See my portfolio site here.
• How to reach me:
  • LinkedIn: LinkedIn
  • Email: EthanKletschke@Outlook.com
• Pronouns: he/him
• Fun facts:
  • My birthday is on 2006-12-06
  • I taught myself the basics of many programming languages, listed here, as well as most of what I know in terms of programming concepts and syntax.
    • I taught myself using sites like W3Schools.com, Tutorialspoint.com, GeeksForGeeks, and countless programming languages' documentation.
  • I use AI sometimes for debugging or explaining concepts, but I prefer writing my own code

I am proficient in:

• JavaScript (Both for node.js and web development)
• TypeScript
• React
• CSS
• Markdown
• HTML
• Git

And I know at least the basics of:

• "Basic" (Standard) SQL
• JSON
• JSON Schemas
• PostgreSQL
• Bash scripting for Linux (practiced via the Windows Subsystem for Linux (WSL))
• Java (From my 1st year of university)
• C# (From my 2nd year of university)
• Pascal (Delphi specifically, from high school)
• Python
• Makefiles
• HTML DOM Handling via JavaScript
• Docker

I use COBOL for hobby apps, specifically with GnuCOBOL, using Arnold Trembley's pre-built Windows binary. I also use it via my WSL2 Ubuntu distro.

Additionally, I use XML and its related languages (XSD, DTD, XSLT) for hobby projects as well.

I have previously experimented to varying degrees with the languages and frameworks listed below. Unless otherwise specified, I do not use these languages and frameworks anymore.

• Perl
• C++
• Bootstrap 4
• Bootstrap 5
• Fortran 90
• PHP
• Material UI (React)
• jQuery
• Extended Backus-Naur Form (EBNF)
  • Specifically, in my repository "E-Calc", I used the stricter ISO standard for EBNF to create a basic calculator and assignment language.

I am familiar with the following concepts:

• Conventional Commits (Git)
• Signed Commits and Tags with GPG keys
• Object-oriented Programming (OOP)
• Data Structures and Algorithms (DSA)
• GitHub repositories (I currently have 23 public repos all made by myself as of 2026-09-10)

These are areas I'm actively working on improving:

• Writing readable, self-documenting code with meaningful, targeted comments
• Improving debugging skills in larger or unfamiliar codebases
• Deep understanding of algorithms and data structures
• Applying object-oriented design principles (DRY, SOLID)
• Using Conventional Commits for cleaner Git history

• Docker
  • Building images with Dockerfiles
  • Running Containers
  • Container networking
• The HTTP Protocol (In-depth)
• PostgreSQL
  • Database admin topics
  • The different object types available in PostgreSQL
  • Inner and Left Joins