07/09/2026 updated
100 % available
DevOps Engineer / Linux System Administrator
Szczecin, Poland
Only remote
College (2nd-Year Student, Optima College)Linux
Linux System Administration
Advanced Linux administration with deep knowledge of monolithic kernel architecture, DeviceTree, Systemd, and process management. Expertise in low-level system operations and OS internals.
Web Servers & Proxies
Configuration, tuning, and management of Nginx and Apache web servers including reverse proxying, load balancing, and ensuring high availability and optimal response times.
Networking & Security
Implementation of VPN solutions, SSL/TLS lifecycle management, TCP/IP networking, network routing, and server hardening to ensure secure and reliable infrastructure.
Automation & Scripting
Bash scripting for automation of workflows, pipelines, and manuscript processing. Use of PM2 for process management and fault-tolerant operation under concurrent loads.
Node.js Backend Deployment
Deployment and management of Node.js-based backend applications including secure web messenger infrastructure and backend application lifecycle management.
SMTP Integration
Configuration of secure authentication flows integrating external SMTP services for reliable email delivery and verification.
Infrastructure Architecture
Architecting, deploying, and managing hosting infrastructures from the ground up, including digital branding and hosting reseller platforms.
SSL Certificate Management
Implementation of automated SSL certificate provisioning and secure data routing as part of comprehensive security protocols.
Advanced Linux administration with deep knowledge of monolithic kernel architecture, DeviceTree, Systemd, and process management. Expertise in low-level system operations and OS internals.
Web Servers & Proxies
Configuration, tuning, and management of Nginx and Apache web servers including reverse proxying, load balancing, and ensuring high availability and optimal response times.
Networking & Security
Implementation of VPN solutions, SSL/TLS lifecycle management, TCP/IP networking, network routing, and server hardening to ensure secure and reliable infrastructure.
Automation & Scripting
Bash scripting for automation of workflows, pipelines, and manuscript processing. Use of PM2 for process management and fault-tolerant operation under concurrent loads.
Node.js Backend Deployment
Deployment and management of Node.js-based backend applications including secure web messenger infrastructure and backend application lifecycle management.
SMTP Integration
Configuration of secure authentication flows integrating external SMTP services for reliable email delivery and verification.
Infrastructure Architecture
Architecting, deploying, and managing hosting infrastructures from the ground up, including digital branding and hosting reseller platforms.
SSL Certificate Management
Implementation of automated SSL certificate provisioning and secure data routing as part of comprehensive security protocols.
Experience
Professional experience0 - 5 years
Freelancer since2025
Languages
EnglishFluentPolishBasic knowledgeUkrainianNative speaker
Project history
Architected and currently maintains the core server infrastructure for a digital branding and hosting reseller platform. Deploys and tunes Nginx and Apache web servers for high availability and optimal response times. Implements security protocols including automated SSL certificate provisioning and secure data routing. Manages backend application lifecycles and ensures continuous uptime for hosted client services.
Authored Linux Encyclopedia, a comprehensive technical book detailing the internal mechanisms and architecture of the monolithic Linux kernel. Developed automated Bash workflows to process manuscripts and compile the final publication for digital platforms (Leanpub, Amazon).
Designed and deployed the backend server infrastructure for a secure, Node.js-based messaging application. Configured secure authentication flows integrating external SMTP services for reliable email delivery and verification. Optimized server processes using PM2 to ensure fault-tolerant operation under concurrent loads.