DevOps Engineer

Responsibilities

• Develop and maintain infrastructure on bare metal, virtual machines, and Kubernetes.
• Automate application build, delivery, and deployment using GitLab CI/CD and Argo CD.
• Ensure service reliability in a three-site infrastructure, participate in designing and testing failover and recovery scenarios.
• Maintain storage systems, databases, and infrastructure services: manage configurations, updates, backups, and recovery.
• Enhance monitoring and alerts, identify bottlenecks, troubleshoot incidents, and eliminate root causes of recurring failures.
• Ensure secure service interactions, manage secrets, certificates, and access.
• Document architecture, operational procedures, and technical decisions.

Requirements

• Container infrastructure and networking: Kubernetes, K3s, Cilium.
• CI/CD and artifact storage: GitLab CI/CD, Argo CD, Harbor, Nexus.
• Storage: S3-compatible systems — MinIO, SeaweedFS; Ceph.
• Databases and caching: PostgreSQL, ClickHouse, Redis / Valkey.
• Secrets and access management: Vault, Keycloak.
• Communication services: WebRTC, TURN / coturn.
• Monitoring: VictoriaMetrics, Grafana, Zabbix.
• Proficient with Linux and understanding of server infrastructure operation principles.
• Understanding of bare metal, hypervisors, and virtualization; familiarity with Proxmox VE and VMware is a plus.
• Strong understanding of the OSI model at L1–L7 and ability to apply this knowledge in diagnostics.
• Understanding of routing, NAT, and DNS, ability to troubleshoot network connectivity and service availability issues.
• Understanding principles of building resilient infrastructure across three sites: replication, quorum, system behavior during site loss or connectivity issues. Practical experience is highly valued.
• Understanding of cryptographic protection practices, working with certificates, and mutual TLS authentication — mTLS.
• Independence in diagnostics, attention to detail in changes, and ability to assess their impact on availability and security.
• Will be a plus:

- Experience with MikroTik and Huawei networking equipment. - Understanding of NGFW principles, including Positive Technologies solutions. - Experience with NetBird. - Understanding of UEM and MDM system architecture and principles. - Experience deploying and operating infrastructure for local LLM: vLLM, LiteLLM, llama.cpp, Hugging Face models and tools. - Familiarity with GPU infrastructure and computation acceleration: NVIDIA / CUDA, DGX Spark, macOS / Metal.