Alexander Gusarov

DevOps / Infrastructure Engineer

DevOps engineer with 1 year of hands-on production experience in Kubernetes, Linux server management (750+ servers via Ansible), IaC on AWS, and observability from scratch. Scripting and debugging skills from prior dev work help diagnose incidents faster and communicate with dev teams without friction.

Contacts
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Achievements

  • Automated infrastructure management for 750+ Linux servers (Selectel VPS + bare metal) using Ansible playbooks and Kubernetes, reducing manual operations by ~80%
  • Reduced deployment time from 8 to 2 minutes (−75%) by optimizing GitLab CI caching, build parallelization, and Docker layer structure
  • Reduced MTTR by 60% through centralized monitoring stack (Prometheus, Grafana, AlertManager)
  • Reduced Docker image size from 500MB to 200MB by switching to Alpine base, multi-stage builds, and removing debug tools from production images
  • Replaced manual service health checks with automated SaaS monitoring service (Go + PostgreSQL + React) supporting configurable check intervals (10s–24h)
  • Responded to production incidents including SSH brute-force attacks with 1.5–2 minute SLA via KVM live access and automated blocking

Experience

InfoScale Dec 2024 — Jan 2026
DevOps Engineer
  • Monitored and maintained 750+ Linux servers (Selectel VPS and bare metal) — network interfaces, port configuration, SSH access management, and incident response
  • Deployed and maintained Kubernetes clusters on Yandex Cloud and self-hosted infrastructure (GitLab, Matrix, Keycloak, Vault); wrote Helm charts for internal services and adapted community charts for production use
  • Built Terraform infrastructure for ~20 AWS services, reducing monthly costs from $550 to $300; wrote custom modules for repeatable deployments, provisioned ClickHouse clusters; used Ansible for per-instance configuration and secrets management
  • Optimized CI/CD pipelines across multiple repos (GitHub Actions + GitLab CI); unified pipeline structure, added caching and build parallelization, reduced deploy time from 8 to 2 minutes
  • Built observability stack from scratch using VictoriaMetrics for metrics storage, Prometheus for scraping and alerting, custom Grafana dashboards for service health visualization; integrated AlertManager with Telegram and Matrix for incident notifications
  • Developed and deployed SaaS monitoring service (Go + Gin/GORM + React) with ping, domain, and SSL checks; configurable intervals from 10 seconds to 24 hours
  • Responded to production incidents including SSH brute-force attacks via KVM live access; blocked malicious IPs, rotated compromised credentials, configured fail2ban and SSH timeouts
  • Grew infrastructure team from 3 to 6 engineers; mentored 3 junior members on Kubernetes basics, GitLab CI best practices, and incident response procedures
AZNResearch Jul 2022 — Oct 2023
Fullstack Engineer
  • Developed backend services with .NET Core + EF Core; built REST APIs for internal government and enterprise systems
  • Introduced Git workflow, GitLab CI pipelines and Docker for dev environments
  • Improved team productivity by ~25% through code reviews, CI automation, and knowledge sharing
Project Tech Feb 2017 — Oct 2019
Software Engineer / Co-Founder
  • Built multiplayer backend for Bhop Jump (on-prem master server + Google Cloud); P2P + dedicated servers supporting up to 16 players
  • Delivered 10+ production projects including mobile games, web apps, and business software
  • Deployed services using Docker; set up macOS VMs for iOS build pipelines