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Danilo Lazić

DevOps Engineer | System Administrator | Developer

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About Me

Final-year Computer Science student with 10 years of programming experience and a strong foundation in DevOps, System Administration, and Software Development. Passionate about backend development, modern infrastructure tools, and scalable system design. Seeking opportunities to apply and expand my skills.

Skills

DevOps & Cloud

Docker Vagrant KVM OpenVPN HAProxy Zabbix Keycloak

Security

iptables Suricata IDS WAF Anti-DDoS server hardening

Languages

Bash/Shell Python Java C C++ C# JavaScript Perl SaltStack

Frameworks

Express Node.js React

Databases

MySQL MariaDB PostgreSQL

Tools

Git VS Code VirtualBox VMware Unity

Systems

Windows Ubuntu CentOS Debian Kali Linux

Experience

Tech Coordinator

Google Developer Group On Campus - UP

- Providing technical support and event organization/planning

Technical Coordinator

Google Developer Student Clubs

System Administrator

Freelance

- Managed Linux-based servers and security configurations
- Created a Bash-based Anti-DDoS system effective up to 30 GBit/s
- Acted as both White Hat and Red Hat team for a private client

Assistant Manager

Udruženje građana "Prava Žena"

- Organized humanitarian events to fundraise for children's medical treatments

Bartender and Waiter

MCaffe 037 & Y Club

- Developed teamwork and communication skills in high-pressure environments

Education

University of Primorska

Oct 2022 - Present

Bachelor of Science in Computer Science

University of Coimbra - ISEC

Feb 2025 - Jul 2025

Erasmus+ Exchange, Informatics Security - IT Security, DevOps, Game Design

High Music School "Stevan Hristić"

Sep 2018 - Jun 2022

Sound Design - Music Production

Projects

Anti-DDoS Script

  • Developed using Shell and iptables
  • Effectively mitigated 30Gbit/s attacks for a private client
  • Updated in November 2024 with enhanced filtering rules

View Project

Management of Internet Infrastructures and Services Projects

  • Project 1: Configured DHCP, DNS, Mail, LDAP servers on Debian
  • Project 2: HAProxy load balancing with Keepalived and Zabbix monitoring

IT Security Projects

  • Project 1: Secure remote access using OpenVPN (Road Warrior)
  • Project 2: Network filtering with NFTables and Suricata IDS
  • Project 3: Keycloak SSO with brute-force detection

DoS Detection

  • Developed using Java and Shell
  • Filtered packets with tcpdump and analyzed using Bollinger Bands
  • Class project with complete threat detection pipeline

View Project

Python Flask Booking System

  • Developed using Python Flask, MySQL
  • DJ booking platform with Google Calendar API integration
  • Live at duxymusic.com

View Project

Unity Multiplayer Game - Shifting Tides

  • Group project for Game Design course (Erasmus)
  • Used Unity, Unity Multiplay, and Netcode for GameObjects
  • Developed card-based mechanics and real-time interaction system

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Dutch AR Game

  • Developed using Unity, Vuforia Engine and C#
  • This project was developed for a class project

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Elevator and Hangman simulators

  • Developed using C
  • Program that simulates elevator and the Hangman game
  • These programs were developed for a class project

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More or less, less is more

  • Developed using Java
  • This program was developed for a class project

View Project

WordPress Website

  • Developed using WordPress
  • This website was developed for the humanitarian association
  • Optimized with WPCache, improved security with WPSecurity

View Project

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