Mirko Bjelic

Database Administrator

Specializing in database management, optimization, and security

About Me

I am a passionate Database Administrator with expertise in designing, implementing, and maintaining database solutions. My focus is on ensuring data integrity, optimizing performance, and implementing robust security measures.

Curriculum Vitae

Experience

Jun 2025 - Present

Database administrator

Optica Abrechnungs­zentrum Dr. Güldener GmbH

  • De-/Installing and configuring databases
  • Operating, maintaining and monitoring databases
  • Coordinating and execute operations essential to the availability, recoverability and performance
  • Creating system copies for development and test environments
  • Conducting necessary recovery, restart and restore proceedings
  • Support during planning, test and implementation of new systems
  • Collaboration and support in various projects as a DBA
  • Scripting: Shell, Powershell, Python
Oct 2023 - May 2025

Database administrator MSSQL, SAP HANA, DB2 LUW & PostgreSQL

gkv informatik GbR

2021 - Oct 2023

Database administrator MSSQL, DB2 LUW & SAP HANA

gkv informatik GbR

2015 - 2021

Database administrator DB2 LUW & SAP HANA

gkv informatik GbR

Jul 2013 - 2015

Database administrator DB2 LUW

gkv informatik GbR

Skills & Languages

Database Skills

DB2 LUW 8/10
SQL Server 8/10
SAP HANA 6/10
PostgreSQL 5/10
Informix 2/10

Additional Technologies

Container 3/10
OpenShift, Docker
Git 3/10
GitHub, Bitbucket
Web Development 3/10
HTML, PHP, CSS

Languages

German Native
Mother Tongue
English B2
Professional working proficiency

Certifications

University of Michigan

Building Web Applications in PHP

University of Michigan

Issued Dez 2024 · No Expiration

Credential ID: 9U1E1PPDVFZ9 Verify Certificate
University of Michigan

Introduction to Structured Query Language (SQL)

University of Michigan

Issued Dez 2024 · No Expiration

Credential ID: SED7SS29W9N2 Verify Certificate
Red Hat

Foundations of Red Hat Cloud-native Development

Red Hat

Issued Feb 2024 · No Expiration

Credential ID: 4WQPDR6BLYWW Verify Certificate
Google

Foundations: Data, Data, Everywhere

Google

Issued Jan 2023 · No Expiration

Credential ID: AVRAHJDACKVE Verify Certificate
IBM

Relational Database Administration (DBA)

IBM

Issued Dez 2022 · No Expiration

Credential ID: ZG9ZFQMHYM68 Verify Certificate
University of Cambridge

Business English Certificate Vantage (B2)

Cambridge Assessment English

Issued June 2019 · No Expiration

IBM

IBM Certified Database Associate - DB2 11.1 Fundamentals for LUW

IBM

Issued Sept 2016 · No Expiration

Credential ID: Verify Certificate
IBM

IBM Certified Database Associate - DB2 10.5 Fundamentals for LUW

IBM

Issued Sept 2016 · No Expiration

IBM

IBM Certified Database Administrator - DB2 10.1 for Linux UNIX and Windows

IBM

Issued Sept 2016 · No Expiration

Projects

WebGUI for Inventory DB

Build a GUI for our Inventory Database running on Oracle. Used as the main tool for our team.

WebGUI Preview

On-Call-Duty Planner (Personal)

Building an web based on-call duty planner to learn HTML, PHP, CSS and JavaScript. It's a work in progress!

Duty-Planner Preview

DBA Fun Facts

🚀

Query Speed

A well-optimized database query can be up to 100,000 times faster than a poorly optimized one!

💾

Data Growth

Global data creation is projected to grow to more than 180 zettabytes by 2025. That's 180 billion terabytes!

⚡

Response Time

The average human notices a delay after 100ms. DBAs work to keep query responses under this threshold!

🔒

Security

The average cost of a data breach in 2023 was $4.45 million. DBAs are the guardians preventing these breaches!

Beyond the Database

When I'm not optimizing queries or managing databases, you'll find me...

✈️

Aviation

Passionate about aviation and everything that flies. From modern jets to vintage aircraft, the complexity and engineering behind flight fascinate me.

Favorite Aircraft: Airbus A350 & Boeing 787
🌍

Travelling

Exploring the world, experiencing diverse cultures, and collecting memories across continents.

Countries visited: 42 Continents visited: 6/7
View Flight Profile
Flightradar24 Profile Banner
🏈

American Football

Die-hard New England Patriots fan. The strategic depth and team coordination in football mirror the complexity of database management.

Favorite Team: New England Patriots
🎵

Music

Eclectic taste in music spanning jazz, country, and hip hop. Music is my way to find rhythm in both code and life.

Favorite Genres: Jazz, Country, Hip Hop
💻

Web Development

Exploring the creative side of technology through web development. Building functional and (sometimes) beautiful interfaces is my hobby.

Current Stack: HTML, CSS, PHP, JavaScript
🖥️

Homelab

Passionate about self-hosting and network infrastructure. Experimenting with Docker containerization, Wireguard VPN, and PiHole for network-wide ad blocking and DNS management.

Get in Touch

📧

Email

contact@mbjelic.de

💼

LinkedIn

www.linkedin.com/in/mirko-b-22a72b78

💻

GitHub

https://github.com/nubbeldupp

Imprint

Mirko Bjelic
Mailänder Platz 19
70173 Stuttgart, Germany

Contact:
Email: webmaster@mbjelic.de
Phone: +49 (0) 1575 4669941

Disclaimer: This is a personal portfolio website. All rights reserved. © 2024 Mirko Bjelic

Legal Notice: This website is for professional presentation purposes. The views and opinions expressed are solely those of the author.