Иван Сергеев - Резюме DevOps Engineer

Systems-focused DevOps Engineer with 4 years of hands-on experience in Linux administration, containerization, and infrastructure automation. Strong background in system internals and networking from roles at Kaspersky and Reg.ru. Experienced in migrating legacy bare-metal workloads to containerized environments (Docker Swarm and Kubernetes) and setting up high-availability databases, automated CI/CD pipelines, and robust monitoring. Redbox Solutions (Web & Fintech Development Studio) DevOps Engineer | 2024 – Present Migrated 20+ legacy PHP and Node.js projects from native bare-metal servers to containerized environments (Docker Swarm and Kubernetes). Configured and maintained lightweight Kubernetes (k3s) clusters for development and staging environments. Wrote basic Kubernetes deployment manifests, ConfigMaps, Secrets, and customized Helm charts for microservice deployments. Built and maintained high-availability database clusters for PostgreSQL and MySQL using Orchestrator. Designed and optimized automated GitLab CI/CD pipelines (gitlab-ci.yml) for seamless code testing and delivery. Set up Traefik and Nginx reverse proxies with automated SSL certificate generation. Deployed and configured Prometheus, Grafana, and Loki stacks to monitor system health and aggregate application logs. Reg.ru (Web Hosting Provider & Domain Registrar) System Administrator / DevOps Intern | 2023 – 2024 Administered client-facing VPS/VDS infrastructure, troubleshooting kernel, OS-level, and filesystem issues. Wrote Bash scripts to automate routine server provisioning and configuration tasks. Managed network routing, firewalls, and internal OpenVPN/WireGuard configurations. Assisted development teams in configuring local Docker environments and troubleshooting container network issues. Kaspersky Lab (Cybersecurity Company) System Administrator | 2022 – 2023 Managed corporate Linux server infrastructure and network hardware. Diagnosed and resolved complex hardware, operating system, and routing issues. Configured and monitored secure site-to-site VPN tunnels for corporate offices. Hardened server configurations to meet internal cybersecurity compliance standards.

Kazan State Power Engineering University | 2021 – 2023 Pursued Bachelor of Science in Mechatronics and Robotics (Software Engineering & Control Systems focus) — Discontinued to focus on full-time engineering career

Operating Systems: Linux (Debian/Ubuntu, CentOS/RHEL) Containerization & Orchestration: Docker, Docker Compose, Docker Swarm, Kubernetes (k3s, kubectl, Helm, manifests) CI/CD & Version Control: GitLab CI/CD, Git, GitHub Actions Web Servers & Proxies: Nginx, Traefik, Caddy Databases & HA: PostgreSQL, MySQL, Orchestrator (HA clustering), Redis, RabbitMQ Monitoring & Logging: Prometheus, Grafana, Loki Networking & Security: Firewalls (iptables/ufw), VPN (OpenVPN, WireGuard, XRAY-core), TCP/IP troubleshooting, VPS/VDS management

Английский

LANGUAGES
English: B2 (Upper-Intermediate) — fluent in technical discussions and daily communication.
Russian: Native