Marin Susic

Cybersecurity Professional & Developer

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.

About Me

Passionate about securing digital landscapes and building robust solutions

Education

Master's in IT Security

Technical University of Darmstadt

Darmstadt, Germany

Current

Bachelor's in Computer Science

Technische Hochschule Ulm

Ulm, Germany

Mobile App Development & Information Security

Computer Technician

SŠ fra Andrije Kačića Miošića

Ploče, Croatia

High School Diploma

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

Secure Application Development
ISMS Development & Implementation
Security Architecture

Development

Backend Development & Cloud Functions
Database Architecture & Security
Basic Frontend Development

Featured Projects

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

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

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 Events

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

Dirch

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

Python Security Learning

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

Get in Touch

Interested in collaboration? Let's connect!

Feel free to reach out through any of these channels: