Packages

Linux server administration: systemd services, firewall configuration (ufw/nftables), SSH hardening, log analysis, and system troubleshooting

Nginx configuration: reverse proxy, SSL/TLS termination, rate limiting, caching, and serving SPA and API backends

PostgreSQL operations: backups (pg_dump/restore), monitoring, vacuum tuning, replication setup, and schema migrations

GitHub Actions CI/CD pipelines: build, test, deploy workflows with caching, secrets management, matrix strategies, and reusable workflows

Dockerfile authoring, docker-compose stacks, multi-stage builds, health checks, and container security best practices