> about_me
I'm a network engineer and penetration tester based in Greece, with a purple team mindset — I think like an attacker, defend like an engineer. My core is networking: MikroTik infrastructure, complex VLANs, VPN tunnels, BGP, OSPF, QoS, and full network automation. On the security side I run authorized assessments — web app, wireless, infrastructure — then stay to harden what I found. In the field I work across the full RF spectrum (12.5KHz–90GHz): LoRa, wMBUS, microwave P2P links, WiFi deployments, antenna alignment, and spectrum analysis. I also handle fiber splicing, PON activation, CCTV integration, smart home energy automation, and photovoltaic installations. On the dev side I build full-stack applications with React, Next.js, C#, and Python — backed by Docker, MSSQL, and PostgreSQL — and integrate AI where it genuinely adds value. Down at the hardware level I design and build complete systems: custom workstations, watercooling, servers, embedded devices with RPi and Arduino, and IoT deployments planned with GIS from site survey to activation. If it runs on electrons, I've probably worked on it.
terminal://session
$ whoami ioannis $ cat roles.txt > Network Engineer (MikroTik / VLAN / VPN) > Penetration Tester > Purple Team Operator > Full Stack Developer > IoT & RF Systems Engineer > Embedded Systems (RPi / Arduino) > Security Systems Integrator (CCTV / Signal Center) > Smart Home Energy Automation Engineer > Field Technician (Microwave / Fiber / PV) $ locate passion /usr/bin/hacking /usr/bin/building /usr/bin/deploying /field/antenna_alignment /field/spectrum_analyser /field/wireless_coverage_and_efficiency /field/cctv_commissioning /lab/security_validation_and_hardening /iot/green_automation $ _
> skills_
Offensive Security
- Penetration Testing
- Network Scanning
- Web App Security Testing
- SQL Injection Assessment & Remediation
- Exploitation
- Privilege Escalation
- Social Engineering
- Metasploit
- Burp Suite
Defensive / Blue Team
- Threat Detection
- SIEM
- Incident Response
- Log Analysis
- Firewall Management
- IDS/IPS
- Security Hardening
Purple Team
- Attack Simulation
- Detection Engineering
- MITRE ATT&CK
- Red/Blue Collaboration
- TTPs
Networking
- TCP/IP
- Routing & Switching
- Complex VLANs
- VPN (IPsec / WireGuard / OVPN)
- MikroTik / RouterOS
- Captive Portal
- Packet Analysis
- Wireshark
- Nmap
- Network Automation
- Firewall Design
- MPLS
- 802.1X / NAC
- WPA2/WPA3 Enterprise
- OSPF Multi-Area Design
- BGP Peering & Policy Control
- QoS Traffic Shaping
Full Stack Dev
- React
- Next.js
- Nest.js
- TypeScript
- JavaScript
- C#
- .NET
- Node.js
- Python
- REST APIs
- MSSQL
- PostgreSQL
- MongoDB
- Docker
- AI Integration
- Java Spring Boot
- Rust (basics)
Tools & Platforms
- Kali Linux
- ParrotOS
- Burp Suite
- Metasploit
- Nessus
- OWASP ZAP
- Hashcat
- Crunch
- Suricata IDS
- Grafana + Prometheus
- GitHub
- VS Code
- Visual Studio
- Proxmox
- ArcGIS
- AutoCAD
Wireless & RF
- NFC (13.56MHz)
- Sub-GHz RF — 12.5KHz, 434MHz, 868MHz
- LoRa (868MHz / 915MHz)
- wMBUS (868MHz)
- WiFi — 2.4GHz, 5GHz, 6GHz (802.11 a/b/g/n/ac/ax)
- Microwave P2P Links (18GHz–90GHz)
- Antenna Alignment, Azimuth & Fresnel Zone
- Frequency Planning & Spectrum Analysis
- Smart Home / IoT
- Authorized Wi-Fi Deauth Resilience Testing
- Airodump-ng Capture Analysis (Authorized)
- SDR (Software Defined Radio)
- QPSK / OFDM / QAM Modulation
Embedded & Hardware
- Raspberry Pi
- Arduino
- Electronics
- Firmware Basics
- Hardware Integration
- IoT Device Deployment
- CCTV Installations & Programming
- Signal Center Integration
- Smart Metering / Energy Monitoring
- ESP32 (Wi-Fi / BLE Edge Nodes)
- Modbus RTU/TCP
- RS-485 Industrial Bus
- RS-232
Field & Infrastructure
- Fiber Optic Splicing & Installation
- PON Activation
- Photovoltaic Systems
- Basic Electrical Installations
- Microwave P2P Links
- GIS Network Design
- Network Site Surveys
- AutoCAD
- OTDR (Optical Time-Domain Reflectometer)
> selected_projects_
EM Spectrum Explorer
Interactive electromagnetic spectrum atlas — explore RF bands, wireless technologies, modulation types, and frequency phenomena with WebGL zoom/pan canvas. Educational & professional modes.
> contact_
Open to security collaborations, network infrastructure projects, IoT deployments, freelance dev work, and interesting problems — remote or on-site in Greece.
Based in Greece · Available for remote work
Self-taught with real deployments > paper cert