Linux Administrator | IoT & Home Automation Specialist | Aspiring DevOps Engineer
Technology enthusiast with 4+ years of hands-on Linux experience through personal projects and home lab environments. Passionate about automation, containerization, and building reliable infrastructure.
📧 maciej@krajewma.pl | 📱 +48 732 494 110 | 🏠 Gliwice | 🐙 GitHub: NoTreblee
@szlacroxx:matrix.org
About Me
Technology enthusiast with 4 years of practical experience working with Linux systems (Arch, Debian, Ubuntu, RHEL, Windows, macOS) through personal projects and home lab environments [1] I possess knowledge in network and system administration, including server configuration, Docker containerization, and automation. Currently preparing for LPIC-1 certification and completing intensive DevOps training [2]
My background in customer service has taught me effective technical communication and problem-solving under pressure. I can translate complex technical issues into simple, understandable language—an essential skill for cross-functional collaboration in technical teams [2]
Beyond IT, I design and 3D print custom parts using CAD software, including building my own 3D printer from scratch—demonstrating my ability to learn complex systems and solve hardware-software integration challenges.
Technical Skills
| Category | Technologies |
|---|---|
| Operating Systems | Linux (Arch, Debian, Ubuntu, RHEL), Windows, macOS |
| Containerization | Docker, Podman, Docker Compose |
| Infrastructure & Automation | Ansible, Terraform (learning), Bash/Shell scripting |
| Cloud | AWS (learning), OVH |
| IoT & Embedded | ESP32, Raspberry Pi, Arduino, MicroPython |
| Smart Home | Home Assistant, ESP32 integrations |
| Monitoring & Backup | Cockpit, Portainer, Prometheus, Grafana (learning) |
| Version Control | Git, GitHub, GitLab |
| Networking | DHCP, NAS, VPN, Cloudflare Tunnel |
| Databases | PostgreSQL, MySQL |
| Programming | Python, Rust (basics), Bash |
| Web | Nginx, reverse proxy, load balancing |
| CAD & 3D Printing | Custom 3D printer build, CAD design, part fabrication |
Certifications & Training
| Certification | Status | Date |
|---|---|---|
| LPIC-1 Linux Professional Institute | In progress | Q1 2026 (planned) [1] |
| Python Bootcamp | Completed | December 2025 [2] |
| Web Development Course | Completed | April 2022 [1] |
| Junior DevOps Intensive Program | In progress | 2026 [3] |
Featured Projects
🌡️ ESP32 Temperature Switch & Home Assistant Integration
Technologies: MicroPython | ESP32 | IoT | Home Assistant | REST API
Real-time binary entity control in Home Assistant, reducing manual temperature monitoring. WiFi communication with API integration.
🔐 Smart Lock System
Technologies: MicroPython | ESP32 | IoT | Bluetooth | WiFi | NFC
Gate electric lock control via Home Assistant with alternative dedicated microcontroller button control. Wireless communication with access security, supporting Bluetooth, WiFi, and NFC.
🏠 Home Lab Infrastructure
Technologies: Docker | Linux | Networking | Automation
Complete self-hosted environment demonstrating system administration skills:
- DHCP Server: IP address management for home network
- NAS: Nextcloud for file storage and synchronization
- Print Server: Centralized network printing
- Game Server: Minecraft Server (Docker containerized)
- Home Assistant: Home automation with custom microcontrollers
- Monitoring: Cockpit, Portainer for system oversight
- Backup: Automated backups with rsync
- Remote Access: Secure Cloudflare Tunnel
🖨️ Custom 3D Printer Build
Technologies: CAD Design | Hardware Assembly | Firmware Configuration | Electronics
Designed, sourced, and assembled a fully functional 3D printer from scratch:
- Created custom parts using CAD software for mechanical components
- Integrated electronics: stepper motors, heated bed, extruder, control board
- Configured firmware (Marlin/Klipper) for precise motion control
- Calibrated and optimized print settings for various materials
- Troubleshot hardware-software integration issues
Demonstrates ability to learn complex systems, work across disciplines, and deliver functional hardware projects.
Professional Experience
Nestlé Nespresso S.A. — Customer Service Specialist
March 2023 – January 2025 | Warsaw
- Served 50+ customers daily in retail locations, including diagnosing machine malfunctions and providing technical support [1]
- Resolved complaints with high customer satisfaction rates
- Trained new employees on POS systems and service standards
- Two-time winner of sales target achievement competitions [2]
Polsat Box — Customer Retention Agent
September 2021 – February 2022 | Warsaw
- Provided telephone technical support, explaining decoder/router configuration in simple terms [1]
- Maintained customers through negotiation and technical problem resolution [2]
Profimed — Customer Advisor
September 2020 – May 2021 | Warsaw
- Independent operation of dental supplies retail point
- Comprehensive customer service: product consulting, cashier operations, order processing
- Returns and complaints management with high service standards
- Delivery verification and inventory management
- Periodic inventory stocktaking [2]
Amazon Fulfillment — Junior Team Leader, PiT Operator
November 2019 – August 2020 | Gliwice
- Coordinated team of 20+ people as Junior Team Leader
- Conducted on-the-job training and process optimization [1][2]
Education
IV Liceum Ogólnokształcące im. Orląt Lwowskich — Gliwice
2015 – 2018 [1][2]
Languages
| Language | Level |
|---|---|
| 🇬🇧 English | B2 (communicative, professional context) [2] |
| 🇩🇪 German | A2 [1] |
Current Focus
Since January 2025, I've been intensively preparing for my career transition into DevOps [2]:
- LPIC-1 Certification — Linux system administration
- DevOps Training Program — 6-week intensive covering Docker, Ansible, Terraform, CI/CD, and monitoring [3]
- AWS Cloud — Learning cloud infrastructure and services
- Practical Projects — Home automation, network infrastructure, IoT system integration, 3D printing with custom designs
Contact
- 📧 Email: maciej@krajewma.pl
- 📱 Phone: +48 732 494 110
- 🏠 Location: Gliwice, Poland
- 🐙 GitHub: github.com/NoTreblee
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