Infrastructure & Automation

• ▸Designed and deployed server infrastructure based on Proxmox, provisioned VMs using Terraform with Ansible configuration management
• ▸Deployed K3s cluster, ensured containerization with Docker, and orchestrated high-load Java services
• ▸Deployed self-hosted GitLab with custom runners, implemented secure CI/CD pipeline with Dockerfile linters and Trivy scanning in Harbor
• ▸Automated cluster deployments using ArgoCD
• ▸Managed and performance-tuned MySQL, PostgreSQL, and Redis
• ▸Implemented backup system using Restic with incremental copying and data deduplication

Observability & Monitoring

• ▸Developed business process monitoring based on VictoriaMetrics/Grafana, transforming raw metrics from internal services into analytical dashboards using complex PromQL queries (RPS, quantiles, aggregates)
• ▸Configured Telegram alerting via Grafana and Alertmanager
• ▸Redesigned index structure during migration from Elasticsearch to OpenSearch
• ▸Developed custom Helm charts from scratch for internal microservices and adapted existing external solutions (GitLab AI Gateway, KeepHQ)
• ▸Implemented systematic incident handling process, including maintaining outage registry and preparing technical post-mortems