TETSTACK. portfolio — 2026 / CH.00 PROLOGUE
CH.00 Prologue
A dossier by Kirubel

Tetstack.

Cybersecurity Researcher/Systems Engineer
Software Developer/Digital Designer

Addis Ababa, Ethiopia — Open to Remote
> whoami

(Kirubel)

Sup, I am a security researcher and a software engineer. I love to break things and just see how and to what level they function. I mostly focus on offensive security at low-level to check if I can get a buffer overflow on the software, and develop apps, websites, and APIs. On my free time, I try to make some digital arts like 3D designs, posters and drawings.

root@tetstack-core:~ (i386 · busybox · real kernel)
awaiting operator CLICK TO TYPE
/root/ └─
CH.01 The Work

I break things to understand them, then build them back stronger.

Everything I've made (The Undeleted Ones), audited, or contributed to is open-source. Click any project to view its repository on GitHub.

CH.02 The Craft

Between the binaries, I make things that don't need to compile.

Poster Design 02
Poster Design 02
Poster Design 03
Poster Design 04
Poster Design 04
Poster Design 07
Live Render — The-Donut Spinning
C++ · ASCII · 1.7 KB 80 × 22 chars Z-buffered torus View Source
PicasoTheDeal's Isometric Commit Calendar

Off-screen work. When I'm not auditing binaries I'm pushing pixels — 3D renders, poster compositions and digital drawings. Click any piece to see it full size.

CH.03 Live Signals

The systems keep running while I sleep.

Chaos Engine Streaming
Controlled Chaos Seed — — today View Source
CH.04 The Arsenal

Tools are just extensions of intent.

Languages
C
C++
C#
Assembly x86 / arm
Python
Go
Kotlin
Rust
TypeScript
JavaScript
Bash
Offensive & Research
Sliver C2
Nmap
Burp Suite
Metasploit
AFL++ Fuzzing
Ghidra
IDA Pro
GDB / ptrace
Wireshark
Frameworks & DBs
React / Next.js
Node.js
FastAPI
Three.js / WebGL
PostgreSQL / SQLite
Systems & DevOps
Arch / Debian
Docker
Git CI/CD Pipelines
CMake / Make
Vim / VS Code
CH.05 The Record

The part where I tell you what I've done.

ALX

African Championship Hackathon

Competitor

Competed in the ALX African Championship Hackathon — a continent-wide build sprint bringing engineers from across Africa together to ship working products under tight deadlines. Built and shipped under pressure with a distributed team.

ALX · Kuriftu

Kuriftu-Sponsored ALX Hackathon

Competitor

Participated in ALX hackathons sponsored by Kuriftu — collaborative sprints focused on solving real problems in limited time, shipping under real constraints with a distributed team.

Got a system that needs breaking — or building?

Open to remote security research, systems engineering and full-stack contracts. Drop a line and let's scope it out.

Get in touch