Віталій П.

Senior DevOps / Infrastructure Engineer

Infrastructure engineer with a strong focus on Kubernetes platform operations, GitOps delivery and production reliability. I design and run multi-cluster environments end to end — from provisioning and networking to CI/CD, secret management and observability — and I'm comfortable owning systems where downtime is not an option.

Core strengths

• Kubernetes platform engineering: multi-cluster operations, workload isolation via node pools/taints, autoscaling, resource tuning and cost control
• GitOps delivery at scale: ArgoCD and Flux, app-of-apps patterns, sync ordering, safe rollouts and rollbacks
• CI/CD architecture: pipeline design and refactoring, reusable templates, build/scan/deploy separation, release automation across multi-repo setups
• Secret management and supply-chain hygiene: Vault + External Secrets, SOPS/age, Sealed Secrets, image scanning and static analysis in the pipeline
• Observability: Prometheus, Grafana, Loki/Alloy — metric and log pipelines, label standards, meaningful alerting instead of noise
• Infrastructure as Code: Terraform and Ansible for reproducible provisioning, baseline hardening and fleet-wide changes
• Production troubleshooting: latency, OOM and eviction issues, ingress and networking problems, storage and disk pressure — root-cause driven, not restart-driven
• Blockchain infrastructure: validator and node operations with the uptime, key-security and monitoring discipline that comes with them

Technology stack

• Orchestration: Kubernetes (k3s, DOKS, EKS, managed offerings), Helm, Docker
• GitOps / CI: ArgoCD, Flux, GitLab CI with self-hosted runners, GitHub Actions, CircleCI, Drone
• IaC & config: Terraform, Ansible
• Networking & security: Cilium, Traefik, HAProxy, nginx, Cloudflare, DNS, TLS/SSL, SSH, iptables/UFW
• Data & messaging: Kafka (Strimzi), PostgreSQL, ClickHouse, Redis, S3-compatible object storage
• Monitoring: Prometheus, Grafana, Loki, Alloy, VictoriaMetrics
• Clouds: AWS, GCP, DigitalOcean, Hetzner, OVH, GCore; bare metal and Proxmox virtualization
• Scripting: Bash, Python
• OS: Linux (Ubuntu / Debian)

Background

Around three years of hands-on work with blockchain node and validator infrastructure, including testnet participation across a wide range of protocols, plus a formal blockchain developer course. Prior to that, several years in web development — which still pays off: I read application code, work with developers on their terms, and build pipelines that fit how the product is actually built rather than forcing a generic template onto it.