Aleksa KrstovićAI engineer / System administrator
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From the cable
to the model.

I'm Aleksa Krstović, an AI engineer and system administrator in Belgrade. My work is built on solving problems through automation.

Based in
Belgrade, Serbia
Current role
IT technician and system administrator
Languages
Serbian (native), English (fluent)
Works
On site in Serbia, remotely anywhere
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Portrait of Aleksa Krstović
Aleksa Krstović AI engineer and system administrator

Every layer, one person.

That foundation shapes how I build software. AI assistants and automations are only as reliable as the servers, networks and accounts underneath them, and I set those up myself. One person accountable for both layers means no gap between “the software” and “the IT”.

Alongside work I study law at Union – Nikola Tesla University. It shows in the paperwork: written scopes, clear ownership and careful handling of personal data.

InfrastructureAI and software

  1. Cabling

    Patch panels wired to patch sockets and structured cabling across several open-space offices.

  2. Network

    Managing network equipment, TCP/IP, IP routing and port faults, network printers and the telephone exchange.

  3. Hardware

    More than 200 custom PCs, laptop upgrades, exchange machines and photo kiosks.

  4. Servers and storage

    NAS setup and configuration, Hyper-V virtual machines for testing and backups. Server administration is what I'm learning next.

  5. Systems and accounts

    In-depth knowledge of Windows, plus Microsoft 365, Entra ID, role-based access and Linux.

  6. Software

    Python and Bash, WordPress and HTML sites, hosting on cPanel and HestiaCP.

  7. AI model

    LLM APIs, assistants that answer from company documents, and automations.

My domain is system administration and software development: I build and maintain infrastructure that runs flawlessly in the background of your business.

Experience

  1. 2025 – present

    IT technician and system administrator

    IT 011 d.o.o., Belgrade

    HighlightMoved whole companies to new offices without downtime.

    • Technician and administrator for companies with more than 200 employees.
    • Moved whole companies to new offices, including NAS, hardware and telephone exchanges, without downtime.
    • Set up IT equipment in several open-space offices and wired patch panels to patch sockets.
    • Manage network equipment and set up and configure NAS devices.
    • Administer Microsoft 365 and Entra ID accounts with secure access and role-based permissions.
    • Assembled, tested and tuned more than 200 custom desktop PCs; upgrade laptops and operating systems.
    • Troubleshoot network and IP routing problems and maintain Hyper-V virtual machines for testing and backups.

  2. 2023 – 2025

    IT support and maintenance specialist

    TrePunti d.o.o., Belgrade

    HighlightExchange machine and kiosk systems kept running without interruption.

    • Maintained and repaired the systems inside currency exchange machines and photo kiosks across several locations, keeping them running without interruption.
    • Provided first-line IT support for staff on Windows and Linux.

  3. 2021 – 2022

    Digital marketing and technical assistant

    CarDetailingPro Rodić, Belgrade

    HighlightClient engagement up 50% from multimedia campaigns.

    • Ran multimedia campaigns and social media, increasing client engagement by 50%.

  4. In progress

    Bachelor's degree in law

    Faculty of Business Studies and Law, Union – Nikola Tesla University, Belgrade. Expected 2028.

    Education

  5. 2024

    Pharmaceutical technician, bilingual programme

    Pharmaceutical-Physiotherapy High School, Belgrade

    Education

Work I'm proud of

Projects from both sides of what I do. Move across a card to light it up.

Certificates

Toolkit

The systems and tools I work with every day. The light shows which pillar they serve.