Modern DevOps practices combining development and operations to automate CI/CD pipelines, manage infrastructure as code, and orchestrate cloud environments. Mastery of Kubernetes, Docker containerization, cloud platforms (AWS, Azure, GCP) and monitoring tools to build scalable, resilient and highly automated systems.
CI/CD with GitLab CI, Jenkins, ArgoCD and automated pipelines
Containerization with Docker, Podman and registries (Harbor, ECR)
Kubernetes orchestration with Helm, Istio, service mesh and autoscaling
Infrastructure as Code with Terraform (modules, best practices), Ansible, AWX
Public cloud platforms (AWS, Azure, GCP) and managed services
Monitoring and observability with Prometheus, Grafana, Dynatrace, CloudWatch
Linux administration (RedHat, Debian, Ubuntu) and Bash/Python scripting
DevSecOps security (EPP, EDR, system hardening, vulnerability scanning)
Databases (PostgreSQL, MariaDB) and scalability management
Virtualization (VMware vSphere, ESXi, Proxmox) and cloud migration
The most important concepts to understand this technology and ace your interviews
CI/CD: GitLab CI, Jenkins, ArgoCD, pipelines (build, test, deploy), artifacts
Docker: Dockerfile, multi-stage builds, layers, networking, volumes, Docker Compose
Kubernetes: Pods, Deployments, Services, Ingress, ConfigMaps, Secrets, namespaces
Advanced Kubernetes: Helm charts, Istio service mesh, HPA/VPA, observability (Jaeger, Kiali)
Terraform: providers, resources, modules, state management, workspaces, remote backend
Ansible: playbooks, roles, inventory, variables, handlers, idempotence, AWX/Tower
AWS Cloud: EC2, ECS/EKS, S3, IAM, VPC, ALB/NLB, Lambda, CloudWatch, Kinesis, WAF
Azure Cloud: VM, AKS, Storage, Active Directory, Load Balancer, monitoring
GCP Cloud: Compute Engine, GKE, Cloud Storage, IAM, networking
Linux: administration, systemd, networking, permissions, security hardening, troubleshooting
Scripting: Bash, Python for automation, cron jobs, log parsing
Monitoring: Prometheus (metrics, exporters, PromQL), Grafana dashboards, alerting
Observability: logs (ELK/EFK, Loki), traces (Jaeger), metrics (Prometheus), OpenSearch
Security: Linux hardening, firewalls, SSL/TLS certificates, secrets management (Vault)
Networking: DNS, load balancing, reverse proxy (Nginx, HAProxy), VPN, firewall rules
Scalability: clustering, horizontal/vertical scaling, autoscaling, load balancing
Databases: PostgreSQL/MariaDB administration, backups, replication, performance tuning
GitOps: ArgoCD, Flux, declarative deployments, Git-to-cluster synchronization
Performance: memory optimization, parallelism, caching, CDN
Troubleshooting: debugging containers, log analysis, performance profiling, incident response
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