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tsisar/README.md

Pavlo Tsisar

DevOps Engineer

10+ Years in IT & Networking | Kubernetes | Terraform | Web3 Infrastructure | CI/CD & GitOps | Cloud & Security

Summary

DevOps Engineer with 10+ years in IT and networking, focused on building and operating Kubernetes-based platforms, both managed and self-hosted.
Build infrastructure as code with Terraform and Ansible, deliver through CI/CD and GitOps (ArgoCD, GitHub Actions, GitLab CI), and keep systems observable with Prometheus and Grafana.
Strong networking and security background: routing, VPNs, DNS, firewalls, and secrets management (HashiCorp Vault, 1Password, Infisical).
Experienced in running stateful workloads in production, including PostgreSQL, MySQL, Elasticsearch, and Neo4j.
Write tooling and automation primarily in Go, and use AI tooling (LLM agents, MCP servers) to automate alert triage and routine operations.

Web3 Expertise

  • Extensive experience in Web3 infrastructure, working with RPC nodes, The Graph, Substreams, and SubQuery to support decentralized applications.
  • Designed and deployed multiple Kubernetes-based Web3 environments from scratch, managed with a GitOps approach.
  • Implemented secure and scalable networking solutions for Web3 environments, ensuring high availability and fault tolerance.
  • Hands-on experience running and maintaining blockchain indexers (EVM, Solana, Stellar, Starknet).

Skills

  • Kubernetes & Containers: Kubernetes (managed & self-hosted), Docker, Helm, Cilium, ingress-nginx, cert-manager
  • Infrastructure as Code: Terraform, Ansible
  • CI/CD & GitOps: ArgoCD, GitHub Actions, GitLab CI
  • Secrets Management: HashiCorp Vault, 1Password, Infisical
  • Observability: Prometheus, Grafana, InfluxDB, Telegraf
  • Networking & Security: VPN, VLAN, OSPF, NAT, DNS, firewalls (MikroTik RouterOS, pfSense, OPNsense, OpenWrt)
  • Databases: PostgreSQL, MySQL, Elasticsearch, Neo4j
  • Web3 & Blockchain: RPC nodes, Wormhole, The Graph, Substreams, SubQuery, blockchain indexers
  • Programming: Go, TypeScript, Python, Rust, Java, Kotlin
  • Other: GraphQL, gRPC, MCP servers, LLM agents

Outside of work: embedded & IoT tinkering — ESP32 firmware (ESP-IDF, PlatformIO), AI-powered devices that integrate with LLM assistants, and homelab hardware projects.

@tsisar's activity is private