Web Server/Reverse Proxy
Apache
nginx
Envoy
Caching Proxy (Squid)
Email Server (Postfix, Dovecot, RSpamd)
Application Server (Tomcat, JBoss)
Remote FS(S3, NFS, SMB, FTP)
Content Delivery Network (CDN)
Istio Service Mesh
Distributed Systems
Cloud Networking
DNS Server (bind9, CoreDNS, PowerDNS)
Minio
Rook/Ceph
OpenEBS
NFS
Samba/SMB
ZFS
Kubernetes
Openshift 3.x/4.x
Kubermatic Kubernetes Platform
AKS
EKS
Kubeadm
Kubeone
containerd
CRI-O
Podman
Docker
Docker Compose
BuildKit
VMWare ESXi
kvm
qemu
Xen
Virtualbox
Grafana
Kibana
ElasticSearch/ECK
Loki
Prometheus
Datadog
NewRelic
Alertmanager
Check MK/Nagios
Elastic Beats
FluentD
FluentBit
Elastic APM
Logstash
Jaeger Tracing
Open Telemetry
Arcsight Security information & Event Management (SIEM)
Puppet
Ansible
HashiCorp Vault
Keycloak
Dex
draw.io
UML
EC2
S3
VPC
Gateways
Load Balancer
KMS
HSM
Route53
Compute Engine
Kubernetes Engine
Cloud Functions
App Engine
Cloud Storage
Big Query
Cloud SQL
Cloud Pub/Sub
Jenkins
Gitlab CI
GitHub Actions
Azure DevOps
Argo Workflows
Argo Events
ArgoCD
Argo Rollouts
RunDeck
Harbor
Nexus Repository Manager
Artifactory
Terraform
Crossplane
AWS CloudFormation
Azure Resource Manager Templates
Cloud-Native Architecture
Rancher
Openshift
Cluster-Auto-Scaler
Containerization
Kubebuilder
Istio
Ingress-Nginx
Traefik
Cilium
Calico
External Secrets Operator
External-DNS
Cert-Manager
Knative Functions & Events
Descheduler
OPA Gatekeeper
Kiali
NVIDIA-GPU-Operator
nfs-subdir-external-provisioner
Strimzi (Kafka, Kafka-Connect, Mirrormaker,Kafka-Registry
MongoDB
PostgreSQL
Hyperscaler CLIs(aws, az)
API Design
Confluence
Jira
Bitbucket
Relational Data Modeling
Relational Databases
Oracle
MariaDB
Non-relational Databases MongoDB, Redis, Couchbase, Memcache
Messagebus/-queue
Kafka
NATS
RabbitMQ
IBM MQ
Scrum
Kanban
Lean
DSGVO. BSI Grundschutz 100-1,2,3,4
IAM
WAF
Threat-Detection
DDoS-Protection
SSO
OpenID Connect
OAuth2
SAML
Kerberos
LDAP
Symmetrical/Asymmetrical Encryption & Standards
Container Security
Security by Design
Microservices
Distributed Architecture
Functions/Serverless
Domain Driven Design
Distributed Tracing
Operator Pattern
Throttling Pattern
Datacenter- und Cloud-Design