Technical Skills
Not just surface-level knowledge: An honest assessment of my technical skills from Ansible (95%) to Kubernetes (75%) and Incident Management (100%), structured across 15 categories and over 50 individual skills with experience levels.
As a DevOps engineer and system administrator with over 12 years of experience, I have developed comprehensive expertise in Linux system administration, CI/CD pipelines, container technologies, monitoring solutions, and IT automation. My technical skills are based on solid practical experience from numerous projects in mid-sized and enterprise environments.
My focus is on reliable, well-documented solutions and excellent support. I combine deep technical knowledge with strong troubleshooting skills and the ability to communicate complex technical matters clearly. I am particularly strong in administering Atlassian products, Linux systems, and monitoring infrastructures.
OS Administration
Linux (RHEL/Debian/Ubuntu)
95%12+ years
System administration, Package management, Security hardening
Windows Server (2012-2022)
85%10+ years
Active Directory, GPO, PowerShell automation
Container & Orchestration
Docker / Docker Compose
90%8+ years
Container development, Dockerfile, Compose, Registry management
OpenShift
80%3+ years
Container development, Deployment configuration, Build strategies, Routes
Kubernetes
75%5+ years
Pods, Services, Deployments, ConfigMaps, Persistent volumes
Monitoring & Observability
Prometheus & Grafana
90%7+ years
PromQL, Dashboard development, Alerting, Thresholds
Icinga2 / Nagios
85%9+ years
Service monitoring, Check plugins, Notifications, Performance data
TIG Stack
80%6+ years
Telegraf, InfluxDB, Grafana, Metrics collection, Data retention
ELK Stack
70%4+ years
Elasticsearch, Logstash, Kibana, Log aggregation, Search
IT Security & Identity Management
Samba4 & Active Directory
90%10+ years
Domain controller, LDAP integration, Group policies, Kerberos
Privileged Access Management (PAM)
80%4+ years
PAM solutions, Credential vaulting, Just-in-time access
Security Hardening
85%10+ years
SELinux, Firewall configuration, SSH hardening, Compliance
SSL/TLS & Certificate Management
90%12+ years
Certificate management, Let's Encrypt, Certificate lifecycle
Databases & Directory Services
Microsoft SQL Server
80%8+ years
Administration, Backup/Restore, Performance tuning, Always On
PostgreSQL
80%8+ years
Administration, Performance tuning, Replication, Backup/Restore
MySQL/MariaDB
80%9+ years
Administration, Slow query optimization, Installation
LDAP (OpenLDAP/Samba4)
90%10+ years
Directory services, Schema design, Replication, Kerberos, SSO
Cloud & Virtualization
Proxmox VE
85%7+ years
Cluster management, KVM, Backup, High availability, Storage
VMware vSphere & ESXi
80%8+ years
Cluster management, vMotion, DRS, Snapshots, Templates, Storage
Microsoft Azure
75%4+ years
VMs, Azure DevOps, Azure IoT Hub, Storage, Networking, Cloud migration
Amazon Web Services (AWS EC2)
70%3+ years
Virtual machines, Load balancing, Auto-scaling, VPC, IAM, CloudWatch
Citrix XenServer
70%6+ years
VM management, Storage repositories, High availability, Live migration
Scripting
Bash/Shell Scripting
95%12+ years
Automation, System scripts, Text processing, Cron jobs
PowerShell
85%8+ years
Windows automation, Active Directory, Exchange, WinRM
Python Scripting
80%7+ years
Automation, API integration, Requests, Tool development
Automation & IaC
Ansible (Linux & Windows)
95%6+ years
Playbooks, Roles, Collections, Windows management, Linux management
Terraform
70%3+ years
State management, Modules, Providers, AWS & Azure provisioning
Puppet
60%3+ years
Manifests, Resources, Classes, Hiera data management
Atlassian Expertise
Jira Administration
95%12+ years
Workflows, Automation, ScriptRunner, REST API
Confluence Administration
95%12+ years
Space administration, Macros, User management
Bitbucket Administration
90%10+ years
Repository management, Branch permissions, Hooks, API
Bamboo Administration
80%9+ years
Build plans, Deployment projects, Agents, Integration
CI/CD & Build Pipelines
Git
90%10+ years
Version control, Branching strategies, Code review, Merging
Jenkins
75%6+ years
Pipeline development, Plugins, Build automation, Integration
GitHub Actions
75%4+ years
Workflow automation, Custom actions, Runners, Matrix builds
ArgoCD
70%2+ years
Continuous deployment, Sync policies, Helm integration
GitOps
70%3+ years
Declarative configuration, Git as source of truth, Automated deployments
Webserver & Reverse Proxy
Apache HTTP Server
90%12+ years
Web server configuration, Modules, SSL/TLS, Virtual hosts
Nginx
85%8+ years
Reverse proxy, Load balancing, SSL/TLS, Performance tuning
Traefik
70%3+ years
Docker integration, Let's Encrypt, Dynamic configuration
Microsoft IIS
70%6+ years
Webserver configuration, Application pools, SSL certificates, URL rewrite
Network Services
HAProxy
85%6+ years
Load balancing, SSL termination, Health checks, ACLs, Backend pools
WireGuard VPN
80%4+ years
Site-to-site VPN, Peer configuration, Routing, Performance
pfSense
75%5+ years
VPN, Routing, Traffic shaping, NAT, High availability, Rules
Network Troubleshooting
95%12+ years
tcpdump, Wireshark, netstat, Routing, Firewall, iptables
Troubleshooting & Support
System Performance Analysis
100%10+ years
Bottleneck analysis, Capacity planning, Resource optimization
Log Analysis & Debugging
100%12+ years
grep, awk, sed, journalctl, systemd, Debugging, Root cause analysis
Incident & Problem Management
100%12+ years
Troubleshooting, Post-mortem, ITIL, Ticket system, SLA management
Disaster Recovery
95%7+ years
Backup/Restore, Business continuity, Recovery testing
Consulting & Migration
Atlassian Cloud/DC Migration
95%8+ years
Datacenter to Cloud migration, Planning, Coordination
Requirements Engineering
90%10+ years
Stakeholder interviews, Requirements analysis, Architecture
Technical Documentation
95%12+ years
Confluence, Markdown, Diagrams, Runbooks, Knowledge base, SOPs
Web Development & CMS
Static Website Generators (Hugo CMS)
65%3+ years
Templates, Content management, Multi-language, Deployment