Nikolay Lyan

DevOps / SRE / Infrastructure Engineer

Built and maintained Kubernetes clusters on VMware vSphere, bare metal and Talos/Kubespray: control plane, worker nodes, CNI, ingress, storage, TLS, monitoring and access management. Designed GitLab CI/CD and GitOps delivery processes: Docker image builds, dynamic tags, Helm values, deployments to dev/stage/predprod/prod and synchronization through Argo CD. Implemented observability stacks with Prometheus, Grafana, Alertmanager, Loki/Vector/OpenSearch/Zabbix, improving incident diagnostics and visibility into service health. Administered Linux infrastructure, Nginx/HAProxy, DNS, TLS, VPN, routing and load balancing; investigated complex production incidents across network, OS and application layers. Operated PostgreSQL, MySQL, MongoDB, Redis, Kafka, RabbitMQ and ClickHouse; handled backup/restore, migrations, access management, integrations and troubleshooting. Automated operational tasks using Bash, Python and Ansible: deployments, health checks, reports, AWS/Yandex Cloud/S3 operations, backups, bulk changes and repeatable infrastructure workflows. Worked with security and identity: LDAP/Keycloak/Dex, TLS certificates, secrets, GitLab/Argo CD permissions and basic production hardening practices.

• Built and maintained Kubernetes clusters on VMware vSphere, bare metal and Talos/Kubespray
• Designed GitLab CI/CD and GitOps delivery processes
• Implemented observability stacks with Prometheus, Grafana, Alertmanager, Loki/Vector/OpenSearch/Zabbix, improving incident diagnostics and visibility into service health
• Administered Linux infrastructure, Nginx/HAProxy, DNS, TLS, VPN, routing and load balancing
• Operated PostgreSQL, MySQL, MongoDB, Redis, Kafka, RabbitMQ and ClickHouse
• Automated operational tasks using Bash, Python and Ansible