About
My name is Mateusz Sobański. I have over 14 years of experience in Linux system administration, large production environments, security, monitoring and infrastructure automation.
My background comes mainly from banking, payments and FinTech environments, where stability, security, compliance, documentation and fast production troubleshooting are critical.
Over the years I have maintained large Linux environments covering hundreds of production and test systems. I worked on system hardening, service configuration, monitoring, SSL certificates, log analysis, automation, vulnerability patching and critical service maintenance.
Large environment maintenance
I help maintain environments where continuity matters: Linux servers, VPS, Proxmox, nginx, PHP-FPM, MariaDB/MySQL, Redis, web applications, WordPress, PrestaShop and custom business applications.
Security and post-hack support
I improve system security and help after incidents. I analyze logs, suspicious PHP files, WordPress/PrestaShop infections, redirects, spam, unusual processes, user accounts and server configuration.
- system and network hardening of Linux machines,
- configuration of nginx, SSL, PHP-FPM, MariaDB/MySQL and Redis,
- SSH hardening, firewall, VPN, permissions, service and account separation,
- deployment of ModSecurity, CrowdSec, Wazuh and security rules,
- website cleanup after hacks and analysis of the root cause,
- Zabbix, Nagios, Grafana and Site24x7 monitoring with availability alerts,
- administrative automation with Bash, Python, Ansible and operational scripts.
WordPress, PrestaShop and hosting
I have practical experience maintaining websites and online stores. I help with migrations, updates, 500/502/504 errors, performance issues, PHP configuration, nginx, cache, databases, SSL certificates, backups and security.
I do not treat a website as just WordPress. I look at the whole stack: application, server, database, web server, logs, backup, monitoring, firewall and disaster recovery process.