Deniz Yildirim
IT Network & Infrastructure Engineer
IT Network & Infrastructure Engineer with 9+ years of experience designing, operating, and optimizing business-critical infrastructure. Strong background in multi-site networking, Linux systems, virtualization, firewalls, security, backup, and enterprise platform operations.
Professional Experience
Dot size = tenure · brightness = recencyProfessional Reorientation / Active Job Search
Actively pursuing positions in IT systems administration, network engineering, IT support, and infrastructure across Baden-Württemberg while continuing technical and German-language development.
Intensive German Course
Completed an intensive German-language program focused on professional and social integration while continuing limited remote IT consulting activity during the early part of the program.
Freelance IT Consultant
Provided infrastructure, troubleshooting, maintenance, and technical advisory services to existing IT clients, first on-site in Turkey and later remotely after relocating to Germany.
IT Project Coordinator
Coordinated project delivery, technical planning, and customer communication while acting as the interface between engineering teams and clients.
IT Infrastructure Engineer / IT Consultant
Led and delivered enterprise infrastructure projects covering multi-site networking, VMware virtualization, Fortinet and Palo Alto security, backup and disaster recovery, and full-site IT infrastructure deployments.
IT System & Network Engineer / Team Lead
Led a three-person engineering team supporting multi-tenant customer environments, network operations, VMware clusters, Windows Server infrastructure, and SLA-driven incident and change processes.
Linux System Administrator / Platform Operations
Operated and secured Linux-based hospitality SaaS infrastructure, supported critical reservation services, automated operational tasks, and administered web, database, backup, and platform services.
Selected professional experience · 2016 — Present
Architecture Case Studies
Selected systems, architecture decisions, security boundaries and production trade-offs.
Product & Platform Systems
01 // 4 systemsEngineering & Research Systems
02 // 4 systemsTechnical Domains
- RHEL
- Debian
- Ubuntu
- CentOS
- SELinux
- AppArmor
- iptables/firewalld
- Fail2Ban
- BGP
- OSPF
- EIGRP
- MPLS
- VLAN
- QoS
- LACP
- Spanning Tree
- 802.1X
- DNS
- DHCP
- Wireshark
- VMware ESXi
- vSphere
- vCenter
- Proxmox VE
- KVM/QEMU
- Hyper-V
- Fortinet FortiGate
- Palo Alto NGFW
- Sophos
- MikroTik
- IPS/IDS
- DPI
- SSL Inspection
- IPsec VPN
- SSL VPN
- Veeam
- Synology
- LVM
- RAID
- NFS
- iSCSI
- AWS — foundational experience
- Azure — foundational experience
- Bash
- Python
- Ansible
- Zabbix
- PRTG
- Grafana
- Wireshark
- Active Directory
- DNS
- DHCP
- IIS
- ADFS
- NPS/RADIUS
- Group Policy
- PowerShell
- PCI-DSS
- GDPR / DSGVO practical experience
Education
EN · TR · DE
- TRTurkishNative / C2
- ENEnglishB2 / Professional working proficiency
- DEGermanB2 / actively improving
Open a channel
Open to opportunities in IT infrastructure, network engineering, systems administration and IT support.