Marko Janaćković
PROFESSIONAL SUMMARY Information Technology Engineer with a formal background in computer network administration and hands-on academic and practical experience across networking, Windows and Linux systems, Active Directory, virtualization, information security, web infrastructure, and technical troubleshooting. Practical exposure includes TCP/IP, the OSI model, Windows Server, Linux/Ubuntu, DNS, DHCP, Group Policy, Cisco Packet Tracer, VMware, Kali Linux, Python, SQL, and real-world website/domain security remediation. CORE TECHNICAL SKILLS Security: Information & Network Security | Access Control | Authentication & Authorization | Kali Linux | Hashcat | Malware Remediation | Website/Domain Security Troubleshooting Systems & Identity: Linux/Ubuntu | Windows Server | Active Directory | Group Policy | VMware | Windows & Linux Virtual Machines Networking: TCP/IP | OSI Model (7 layers) | DNS | DHCP | Cisco Packet Tracer | Virtual Networks | Proxy & Mail Server Fundamentals | Fiber/Coaxial Infrastructure Programming & Data: Python | SQL/MySQL | PHP | JavaScript | HTML/CSS Web & Hosting: WordPress | WooCommerce | Shopify | XAMPP | Apache | MySQL | Plesk | Hostinger/hPanel | Backup & Restore | Website Migration | PHP Configuration SECURITY & INFRASTRUCTURE EXPERIENCE Website & Domain Security Remediation - Practical Incident Hands-on • Investigated a domain previously abused by a third party and resolved malware/phishing reputation warnings that affected website trust. • Reviewed the WordPress environment, plugins, themes, configuration, hosting security status, and malware-scan results; restored a known-clean backup and verified normal operation. • Worked through domain/security reputation remediation and related hosting, caching, and configuration checks to restore normal use and credibility. Windows Malware Remediation - Practical Incident Hands-on • Diagnosed and removed malware from a Windows computer and restored normal system operation through troubleshooting and remediation. INFORMATION SECURITY PROJECTS Information Systems Security - Academic Projects 2024. • Developed an Access Control Policy project covering network and operating-system access, authentication, authorization, permissions, and user privileges. • Used Hashcat in Kali Linux for a password-security project involving password hashes and password-security concepts. • Used VMware to create an isolated virtual environment for security-related exercises. NETWORK & SYSTEMS ADMINISTRATION Computer Network Administrator - Practical Training - Electrotechnical School "Zemun", Belgrade 2019.-2020. • Worked hands-on with Windows Server and Linux/Ubuntu environments in laboratory settings. • Practiced Active Directory administration with users, groups, permissions, and Group Policy. • Configured DNS, DHCP, proxy, and mail-server services in laboratory environments. • Created Windows and Linux virtual machines and virtual network environments using VMware. • Built and simulated networks in Cisco Packet Tracer and studied end-to-end TCP/IP communication. • Covered all seven OSI layers, from Physical through Application, and end-to-end data flow across the stack. • Worked with fiber-optic and coaxial cabling, cable crimping, and fiber splicing; studied network-security fundamentals. Marko Janaćković - Security Engineer Application Marko Janaćković Information Technology Engineer | Network & Systems Administration | Security Engineering Belgrade, Serbia | markojanackovic9@gmail.com | +381 60 630 0057 Date of Birth: 28. April 2001. | Citizenship: Serbian | LinkedInSELECTED SOFTWARE PROJECT ATM Application - Python & SQL Academic / Personal Project • Developed an ATM simulation interface in Python connected to an SQL database. • Implemented user registration, database-backed credential validation/authentication, and controlled access to ATM functionality. • Implemented a cash-withdrawal workflow through the ATM interface, applying practical concepts in application logic, databases, credentials, and access control. PROFESSIONAL EXPERIENCE Web Programmer - Titan Dizajn 2026. • Built the NAVINO presentation website from the ground up and supported launch/production updates - navino.rs. • Edited and maintained the existing JETOUR Balkans website and production content/components - jetourbalkans.com. Digital Marketing / Website Editing - Fenix Camp 2025.-Present • Edited and maintained the existing Fenix Camp website; also created advertising content and managed Facebook/Instagram campaigns - fenixcamp.com. Web Programmer - BONIMA LTD, London, UK 2022.-Present • Designed and developed the Better Than Trend Shopify e-commerce project; maintained and troubleshot the website environment while the store was active. Web Programmer - Forever Living Products / Aloe Vera Project 2019.-Present • Designed, developed, and maintained a live WordPress/WooCommerce e-commerce website - aloeverazdravlje.com. • Administered hosting and website operations, including domains, backups/restores, migrations, PHP/WordPress troubleshooting, and security-related issues; also worked locally with XAMPP using Apache and MySQL. EDUCATION Bachelor's Degree in Information Technology - Faculty of Applied Management, Economics and Finance, Belgrade 2020.-2024. Applied Information Technology | 240 ECTS | Final Grade: 10/10 | Thesis: Dropshipping - Business Model as an Example of Modern E-commerce Computer Network Administrator - Electrotechnical School "Zemun", 2016.-2020. Belgrade Relevant training: Computer Networks, Windows Server, Linux, Active Directory, TCP/IP, DNS/DHCP, virtualization, and network security. LANGUAGES & ADDITIONAL INFORMATION Languages: Serbian - Native | English - C2 | Russian - A2 | Chinese - Beginner Driving Licence: Category B | Sport: Competitive basketball for 10 years - KK Žarkovo, KK Cerak
