Current work and experience
I develop my own infrastructure, build web projects, and contribute to a cybersecurity training platform. I'm particularly interested in what happens between an application and its server: how to deploy it, keep it running, and secure it.
BreachLab.org
In May 2026, I joined the BreachLab.org team as a Crew member, following a series of bug and vulnerability reports on the platform.
I test training challenges before publication and after deployment, looking for unintended solutions, validation bypasses, privilege escalation paths, and flag leaks. I also provide feedback on challenge architecture and usability, and help users who get stuck while working through tasks.
One of my reports concerned the Dirty Frag exploit. I tested it on my own machines and shared the results and a proposed mitigation with the platform administrator, who then deployed it on the platform's infrastructure. I documented the analysis and reporting process in Dirty Frag: from vulnerability analysis to production mitigation.
Internship at Arris Agency
During my internship at Arris Agency in late May and June 2026, I worked on containerization with Docker and Kubernetes and CI/CD pipelines in GitLab CI.
My own infrastructure
I maintain a Linux and Proxmox homelab that supports my projects and self-hosted services. In 2026, I added a dedicated backup server running Proxmox Backup Server, automated Docker service updates using Renovate and Portainer, and expanded monitoring and firewall rules.
The environment lets me try solutions in practice, from deploying services to diagnosing failures and maintaining backups. The project page covers the architecture, decisions, and problems I encountered in more detail.
Web projects
I also build commercial projects, ranging from websites to applications with order management and payments. My 2026 projects include Client Portal, the Clein.pl website, and the migration of Sizal.pl from WordPress to a static website.
Learning and training
I continue learning Linux administration and automation. I completed Red Hat courses in System Administration I (RH124), System Administration II (RH134), and Automation with Ansible (RH294). Other training courses and wargames I have completed are listed on my certificates page.
How I got here
2021 - starting with hardware
I built and upgraded computers. Learning about hardware sparked my interest in technology.
2022 - hardware and my first virtual machines
I continued building and upgrading computers. I also experimented with virtual machines, learning how operating systems work and interact with hardware.
2023 - first applications and hosting
I learned PHP, databases, and session management. At the same time, I started hosting Minecraft servers for friends, which led me towards system administration.
2024 - my first homelab
I set up Proxmox VE and explored networking and virtualization. I started using Git and built web applications, including a quiz management platform.
2025 - developing my projects
I improved application configuration, security, and change documentation. I scored 97% on the practical INF.03 vocational exam and also designed a hybrid Minecraft server.