Stefanos Flokos

Dedicated, organized and detail-oriented cybersecurity engineer with a strong passion for coding and a deep interest in system security.

My goal is to expand my cyber security knowledge and skills through participating in key projects and contributing to the enhancement of a company's security policies and incident response protocols, ultimately improving the overall security posture.

• National and Kapodistrian University of Athens

  Department of Informatics and Telecommunications
  BSc in Computer Science ↳ conforming to ACM “Computer Science” curriculum Minor in Software

  Fall 2019 - Fall 2023

  Thesis: JSON Web Token vulnerabilities and their Mitigation

• CompTIA

  Security+ (SY0-701)

  ↳ Issued: August 2024

  

• AWS

  Cloud Practioner (CLF-C02)

  ↳ Issued: January 2025

  

• Software Competitiveness International

  October 2024 - Now

  Athens, Greece

  Automotive Cybersecurity Engineer

  • Performed Threat Analysis and Risk Assessment (TARA) for Over-the-Air update architecture of embedded Android device integrated in infotainment systems.

• Business & Bytes Ltd

  September 2023 - October 2023

  Athens, Greece

  Junior Software Developer

  • Developed a Windows application for remote server monitoring where users can add custom rules for different types of system and database checks. They can also create custom queries to retrieve essential business statistics. (.NET Framework, SQLite)
  • Additionally, created the corresponding web interface for companies to view the status of the aforementioned rules, obtain statistics in a reporting format (both single-level and two-level reporting) on demand for specific dates or date ranges, and make important announcements to their co-workers. (Postgres, Razor Pages, Docker)

• Business & Bytes Ltd

  October 2021 - April 2022

  Athens, Greece

  Software Developer Intern

  • Led the development team in creating the web interface for a health monitoring system designed to remotely assist and monitor COVID-19 patients as part of a European founded project. (Razor Pages)

• University Projects

  • Extended Command Line Projects (C, C++)

    • Miller-Rabin algorithm for primality test of very large numbers
    • System Processes management with semaphores and shared memory
    • LRU and Second Chance algorithms for memory pages replacement
    • Important Data Structures implementations (AVL Trees, Bloom Filter, Skip List etc.)
    • Simple database implementation with heap files

  • Java Projects mainly for Compiler Design (Java)

    • Implementation of a LL(1) parser for a simple calculator
    • Translator to Java for a simple language
    • Semantic Checker for MiniJava
    • Intermediate code Generator from MiniJava to LLVM

  • Artificial Intelligence (Python)

    • Different Search algorithms asked in Pac-Man Berkeley Project
    • Tweet sentiment classification with Softmax Regression
    • Tweet sentiment classification with neural networks (RNN, LSTM, GRU) with vectorizers
    • Q&A on a given text with custom trained BERT Transformer

  • Web Development (Docker, Angular, .NET, EF-Core, MySQL)

    • Ebay clone site with similar functionality

  • Parallel Programming (CUDA, MPI, OpenMP)

    • Jacobi Iteration Method with a combination of parallel techniques (pure MPI, hybrid MPI & OpenMP, Cuda & OpenMP)

  • Security Projects (PHP, C, Assembly, Python, Perl)

    • "Web Wars" project involving finding and exploiting vulnerabilities such as XSS, SQLi, CSRF, RFI on older version of OpenEclass.
    • "Capture the flag" project involving finding and exploiting vulnerabilities such as buffer overflows, string formatting attacks and oracle padding attacks on remote Pico HTTP Server in C.

• Personal Projects

  • Personal website - www.codebaseit.com - with coding content and technology news.(Docker, Postgresql, Nginx)
  • Usage and Maintenance of personal Raspberry Pi Server. (Bash, Docker, UFW, Network Management)

• Object-Oriented Languages: Java, C#, C++
• Scripting Languages: Python, Bash
• Low-Level Languages: C, C++, Assembly
• Frameworks: Angular, .NET, Entity Framework
• Infrastructure: Docker
• Database Management: PostgreSQL & PGAdmin, MySQL & MySQL Workbench
• Version Control: GitHub