Initializing Security Protocols...
Hello, I'm

Marin Susic Cybersecurity Professional

Breaking and fixing codebases for over 12 years — sometimes intentionally.

Backend developer turned security expert, specializing in Secure Application Development and ISMS implementation. Because the best defense is understanding how things break.

12+ Years Experience
7+ Years Security
20+ Projects Completed
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About Me

Passionate about securing digital landscapes and building robust solutions

Education

Master's in IT Security

Current

Technical University of Darmstadt

Darmstadt, Germany

2024 - Present

Bachelor's in Computer Science

Technische Hochschule Ulm

Ulm, Germany

Mobile App Development & Information Security

2020 - 2024

Computer Technician

SŠ fra Andrije Kačića Miošića

Ploče, Croatia

High School Diploma

2016 - 2020

Certifications

Jr Penetration Tester

TryHackMe

View Certificate

Web Fundamentals

TryHackMe

View Certificate

Introduction to Cyber Security

TryHackMe

View Certificate

Pre Security

TryHackMe

View Certificate
Skills & Expertise

Over 7 years in Security, 12 years in Development

Security

Protecting digital assets and implementing robust security measures

Secure Application Development 95%
ISMS Development & Implementation 90%
Security Architecture 85%

Development

Building scalable applications and robust backend systems

Backend Development & Cloud Functions 95%
Database Architecture & Security 90%
Frontend Development 75%

Technology Stack

Flutter
Dart
Python
Kubernetes
Supabase
Firebase
PostgreSQL
SQL
BurpSuite
Metasploit
ISO/IEC 27001
Linux
Wireshark
Nmap
Featured Projects

A selection of my work in security and development (that I'm allowed to show)

Development
Completed

Queasy

A comprehensive mobile quiz application built with Flutter and Firebase. Features user authentication, real-time quiz gameplay, leaderboards, and quiz management system.

Flutter Firebase Dart Real-time
Social Platform
Live

App4it

A social networking platform focused on real-world connections. Enables users to connect through events and QR code-based authentication for genuine interactions.

Mobile Social Flutter Dart PostgreSQL DB Functions Auth
Security
Open Source

Ducky Scripts

A collection of custom-written rubber ducky scripts for security testing and automation. Includes various payloads for different security testing scenarios.

Security Automation Testing Hardware
Tool
Open Source

Dirch

A directory discovery script written in Python. Created to practice Python programming and as an alternative to existing directory discovery tools.

Python Security CLI Learning
Web App
Live

PDF Tools

Privacy-first browser tools to combine PDFs and convert Markdown to PDF with live preview—all processing runs locally on your device.

TypeScript pdf-lib marked
DevOps
Tool

YAML SpiceDB Converter

CLI tool that converts YAML files into SpiceDB schemas, bridging configuration and authorization. Simplifies access control implementation in applications.

CLI Security DevOps YAML
Get in Touch

Interested in collaboration? Let's connect!

Let's Build Something Amazing Together

Whether you're looking for a cybersecurity expert, a backend developer, or someone to help secure your applications, I'm always interested in challenging projects and meaningful collaborations.

Feel free to reach out through any of these channels. I'm usually quick to respond!

Location Darmstadt, Germany
Response Time Usually within 24 hours