MASTER_OPERATOR_ONLINE

HASAN ÇİÇEK

Full-stack Systems Architect and Specialist in FreeBSD Mastery. Engineering high-density infrastructure with custom Bash/Node.js orcherstration, deep-packet filtering, and microservice architectures for ultra-scalable production nodes.

NETWORK_THROUGHPUT
2.8 Gbps / 35,000 CONC
KERNEL_STABILITY
99.98% UPTIME (2xx DAYS)
OS_ACTIVE_NODE: HASAN_SRV_PROD
KERNEL: FreeBSD 14.3 (MASTER)
JAILS_ACTIVE: 14 NODES RUNNING
PF_STATUS: ACTIVE (SNAT/BINAT_LOADED)
MEM_LOAD:
● HASAN@SHELL: LISTENING FOR TRAFFIC...
github/cicekhasann linkedin/cicekhasan
contact@hasancicek.com
ZONE: GLOBAL_ZONE_A

The Technical Repertoire

Deep systems architecture across the kernel, network, and application layers.

Kernel & Network

FreeBSD MasteryJail Management PF (SNAT/BINAT/Rules)OpenVPN Arch Traffic AnalysisDeep Packet Inspect tcpdump / WiresharkIP Routing

Services & Security

Docker SwarmSquid Proxy Snort IDS/IPSNginx (Adv Config) Kea (DHCP)Syslog / Syslog-ng LimitedShellPKI / SSL Audit Prometheus / Grafana

Automation & Core

Bash-to-Service (RC)Source Compilations Python AutomationCron Orchestration Microservices (Design)Concurrency Logic Git / CI / CDVim / Tmux Ops

The Build Stack

Node.jsPHP (Intermediate) ReactElectron (Desktop) Redis CachingPostgreSQL WebSocket LogicUI/UX Performance

Deployment Activity Stream

Jun 2024 - PRESENT

Backend & Systems Engineer

ePati Cyber Security
  • FreeBSD Mastery: Managing 14+ Jails and orchestrating specialized kernel-level networking with PF (NAT, SNAT, BINAT).
  • Service Engineering: Transforming custom automation scripts into robust FreeBSD Services (rc scripts) from scratch.
  • Security Ops: Deployed and tuned high-load Snort IDS, Squid Proxy, and Kea DHCP implementations.
  • Performance: Integrated Redis and custom C++ logic to manage 30k+ concurrent client VPN packets.
  • App Stack: Developed internal diagnostic tools using Electron and Node.js microservices.
Feb 2024 - Jun 2024

Software Engineering Intern

ePati Cyber Security
  • Developed web-based system management portlets using **PHP** and **React**.
  • Created custom Bash scripts for automated versioning and source compilation.

Architecture Artifacts

KERNEL

VPN_JAIL_SIM

Simulating 35k client nodes within FreeBSD Jails with custom PF routing rules for stress testing.

#FreeBSD #PF #Jails
ENGINE

BASH_RC_AUTOMATOR

Framework to automatically convert standalone Bash logic into production-ready FreeBSD services.

#Automation #Bash #RC
CLIENT

NODE_MONITOR_APP

Cross-platform desktop application built with Electron for real-time monitoring of server logs and traffic.

#Electron #NodeJS #Systems