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Rene Kärkkäinen

Finnish technology student at Business College Helsinki, with a background at WithSecure, a leading Nordic cyber security company. Skilled in IT infrastructure, networking, cyber security, web development, and data analysis. Actively seeking opportunities in IT from all over the world to contribute in enhancing system security.

About me

Welcome to my digital abode! I'm Rene Kärkkäinen, a tech enthusiast and student navigating the landscape of information technology with a security first mindset. This platform serves as a hub for insights, experiences, and explorations in the world of technology.

Contact me via your preferred method:

Work experience

IT Manager | Internship
Nordiska Partners Limited, Causeway Bay, Hong Kong SAR
Jun - Jul 2024

I’m responsible for overseeing IT infrastructure, network, and server maintenance. I also focus on implementing information security measures and providing technical support to our team. Managing vendor relations, developing IT strategy, and handling budget and policy development are key parts of my job. I lead various IT projects, ensuring they align seamlessly with company goals.

Information Technology Trainee | Internship
WithSecure Oyj, Helsinki, Finland
Oct - Dec 2023

Maintained computer systems and hardware, analyzed customer data to ensure accuracy and integrity, troubleshooted internal IT issues, and wrote documentation for hardware installation procedures.

Nursing Home Assistant | Summer Job
City of Helsinki, Helsinki, Finland
Jun - Jul 2022

Brightened residents' days with walks, reading time, and fun outings like disco nights, bingo games, and trips to parks.

Store Assistant | Internship
K-Market Rekola, Vantaa, Finland
Dec 2021

Contribute to efficient store operations by assisting with sales, shipment logistics, providing customer service, and ensuring the store maintains a clean and organized environment.


Vocational qualification in ICT specialized in Cyber Security
Business College Helsinki
2022 - present

High School
Töölön Yhteiskoulun aikuislukio
2022 - present

Technical Skills

Diving into the Tech Wonderland, I transform ideas into IT magic!

Network Administration

Proven skills in configuring and maintaining secure and efficient network infrastructures.

Cyber Security

Experienced in implementing robust security measures to protect against cyber threats.

Server Environments

Proficient in managing server environments, using software like ESXi, Proxmox, Puppet and Jenkins.

Linux Systems

In-depth knowledge of Linux systems, including system hardening and proficient troubleshooting skills.

Virtualization Technologies

Skilled in using virtualization platforms like VMware ESXi, Hyper-V, Proxmox and XCP-ng for efficient resource utilization.

IT Infrastructure

Experienced in designing and maintaining reliable and scalable IT infrastructures.

Scripting and Automation

Adept at scripting languages to automate repetitive tasks and enhance workflow efficiency.

Team Collaboration

Proven ability to collaborate seamlessly with cross-functional teams for project success.


Effective problem-solving skills with a keen attention to detail for identifying and resolving issues.

Experimenting with Technology

Server Lab
Where Ideas Take Flight

Gained valuable insights into networking, virtualization, server management, and hardware configurations. The art of running servers, understanding how networks work, and the importance of adaptability in the tech landscape were among the many discoveries.

Experimented with a variety of software tools including Jenkins, Puppet, Git, pfSense, Suricata, OpenVPN, unbound, Nextcloud, NGINX and Apache.

FPS Multiplayer made with Unreal Engine 4
Inspired by Counter-Strike Series

In 2021, I developed 'Beryllium,' an online multiplayer tactical first-person shooter using Unreal Engine 4. The game features competitive gameplay where two teams, Attackers and Defenders, engage in strategic encounters. Attackers aim to achieve specific objectives while Defenders employ various tactics to protect key positions and thwart their opponents.

Haven't looked at the source code since 2022 nor have I any game servers running anymore but if you would like to test the game locally send me an E-Mail and I will send you a Steam redeem code ;)

Software Development

Read More

In programming, comfort is key. I navigate through languages like Python, JavaScript, C++, C# and beyond with ease, using them as tools to bring ideas to life. From exploring frameworks and libraries to tackling real-world problems.

My projects range from software to IoT hardware. I've developed tools such as a search engine for my vinyl record collection and a concept for a peer-to-peer digital banking system. On the hardware side, I've transformed an old Japanese flip-clock to run on USB power using Arduino, which also controls my room's audio system (and will eventually function as an alarm clock).

Let's work together

Seeking opportunities in IT from all over the world!