Göksel Alemdar - Linux Systems & Infrastructure Engineer

Goksel
Alemdar

Welcome to my professional portfolio. I specialize in designing, deploying, and maintaining highly available, secure, and scalable technological infrastructures for environments.

Goksel Alemdar

Linux Systems Administration

Enterprise Linux ecosystems (RHEL-based & Debian-based distributions)
Deep understanding of Linux internals (process lifecycle, memory, I/O, networking)
Advanced troubleshooting & root cause analysis at OS level
System performance tuning, capacity planning & optimization
Filesystem & storage management (LVM, XFS, EXT4)
System security hardening & access control
Service management (systemd), logging, auditing & diagnostics

Infrastructure, Cloud & Virtualization

Design and operation of on-prem, hybrid and cloud-based infrastructure
Physical server provisioning and datacenter deployments
Virtualization platforms (VMware ESXi, KVM, Oracle VM)
Infrastructure scalability, high availability & fault tolerance design
VM lifecycle management, provisioning & resource planning
Disaster recovery planning and infrastructure resilience

Containerization & Orchestration

Container-based architecture design and implementation
Docker ecosystem (image lifecycle, networking, volumes)
Kubernetes cluster setup, administration & scaling
Workload orchestration, service discovery & resilience patterns
Resource optimization and autoscaling strategies

Monitoring, Observability & APM

End-to-end observability architecture (metrics, logs, traces)
Monitoring tools: Zabbix, Nagios, Grafana
ELK Stack (Elasticsearch, Logstash, Kibana) for centralized logging & analysis
Application Performance Monitoring (APM) with Dynatrace
Real User Monitoring (RUM) & synthetic monitoring strategies
Infrastructure, application and database monitoring
Alerting systems, incident detection & response workflows
Root cause analysis using telemetry and performance data

Web & Application Services

High-performance web server management (Nginx, Apache/HTTPD)
Reverse proxy, load balancing & caching strategies
TLS/SSL configuration and secure service exposure
Performance tuning and request flow optimization
Troubleshooting production-level web and application issues

Automation & DevOps

Infrastructure automation and configuration management
Scripting (Bash, Shell, Python) for operational efficiency
Automation tools (Ansible) for provisioning and configuration
Reducing repetitive operational tasks through scripting
CI/CD awareness and deployment process integration
Standardization of infrastructure and operational workflows

Networking

Strong understanding of TCP/IP and network fundamentals
DNS, routing, NAT, firewall and connectivity troubleshooting
Network performance monitoring and diagnostics
Service-level networking and distributed system communication
Secure and reliable network design principles

Database & Service Awareness

Database monitoring and performance awareness
Understanding of query impact and system resource usage
Backup, recovery and data reliability strategies
Integration of database systems into distributed architectures

Production Operations & Reliability

24/7 monitoring and management of production environments
First response and incident handling at OS and infrastructure level
Root cause analysis and long-term issue prevention
Proactive system health checks and anomaly detection
Resource utilization tracking and capacity planning
SLA/SLO awareness and uptime optimization

Reporting & Analysis

Creation of monthly and annual system performance reports
Downtime analysis and incident trend tracking
Continuous improvement planning based on operational data
Providing actionable insights for system and infrastructure improvements

Key Capabilities

Designing and operating large-scale production environments
Building monitoring, alerting and observability systems from scratch
Managing high-availability and fault-tolerant infrastructures
Troubleshooting complex multi-layer issues (OS, network, application)
Deploying and maintaining Kubernetes-based platforms
Optimizing performance across infrastructure and applications
Automating infrastructure to improve reliability and efficiency
Bridging infrastructure, monitoring and application performance domains