Systems & network administrator — ASIR · IT systems at Zataca Systems, Elche, Spain.

Based in Torrevieja, Spain — open to relocation.

• ASIR — Administración de Sistemas Informáticos en Red (higher vocational degree in systems & network administration).
• Hands-on with Linux, Docker, Proxmox, networking, security and monitoring.
• Going deeper into DevOps: CI/CD with GitHub Actions, Kubernetes (k3s), Terraform + Ansible on AWS, Prometheus/Grafana observability — all applied to my own projects below.
• I like building small, self-hosted tools that make infrastructure easier to see and operate.
• Open to: sysadmin, DevOps, networking, cloud, infrastructure.

Self-hosted monitoring dashboard (ICMP/TCP/SSH probes, live CPU/RAM/disk, threshold alerts, history charts) that doubles as my end-to-end DevOps playground — the same app, taken through the whole lifecycle:

• CI/CD — GitHub Actions: lint + tests + Docker build with a real smoke test (run the image, poll the API), auto-publish to Docker Hub on version tags, Dependabot.
• Kubernetes — production-style manifests for k3s (deploy/k8s/): PVC, probes, Traefik ingress.
• Cloud (IaC) — one-command AWS deployment (deploy/aws/): Terraform provisions the EC2 instance, Ansible hardens it with my own debian-hardening-ansible roles and runs the container. ./deploy.sh up, ./deploy.sh destroy down.
• Observability — the app exposes Prometheus metrics (/metrics), and the repo ships a kube-prometheus-stack setup: ServiceMonitor, alert rules and a provisioned Grafana dashboard.

Stack: Node.js · Express · SQLite · Docker · GitHub Actions · Kubernetes (k3s) · Terraform · Ansible · AWS · Prometheus · Grafana

End-to-end deployment of a Wiki.js service on Docker Compose (PostgreSQL + Wiki.js + Nginx) over a hardened Debian VM. Two isolated networks, named volumes, healthchecks, automated backups with retention, monitoring and a tested restore procedure. My ASIR final project — the one that ties everything together.

Stack: Docker Compose · PostgreSQL · Nginx · Debian · Bash · cron

Idempotent Bash script that turns a fresh Debian server into a CIS-mapped secure baseline: sudo user + SSH key, key-only SSH (with a lockout guard), UFW, Fail2Ban, automatic updates, kernel sysctl, mount options, login banners, sudo & password policy, core-dump limits, cron restrictions and AIDE file-integrity monitoring — each step skippable, with a real --dry-run and an end-to-end test that hardens a throwaway container and verifies every promise from the outside.

Stack: Bash · Debian · SSH · UFW · Fail2Ban · AIDE · GitHub Actions

The same CIS-mapped baseline, rebuilt as a suite of idempotent Ansible roles — declarative and role-per-control — with ansible-lint (production profile) + syntax checks in CI, kept symmetric with the Bash version by a shared end-to-end test. Consumed as a pinned dependency by didactic-dashboard's AWS deployment — written once, reused across projects.

Stack: Ansible · Debian · GitHub Actions

Visual LAN scanner on top of nmap: point it at a CIDR, see who's there, browse the topology and diff scans over time. Schedule recurring sweeps with baseline-divergence alerts and webhook/ntfy notifications, and track each host's history, latency and uptime. Runs in Docker with host networking; multi-arch image on GHCR, live read-only demo.

Stack: Node.js · Express · nmap · SQLite · Docker (host net) · GHCR

Visual analyzer for iptables / ip6tables / nftables / ufw rulesets — paste a dump, see the structure. Packet tracing across the full NAT/filter pipeline and a security linter for common ruleset smells. 100% client-side, no backend.

Stack: JavaScript · client-side · GitHub Pages

Visual analyzer for docker-compose.yml — paste a compose file, see the architecture (services, networks, volumes, ports). Security linter, Dockerfile inspection and multi-file extends/include merging. Client-side, no backend.

Stack: JavaScript · client-side · GitHub Pages

• Email — dannyruizboluda@gmail.com
• LinkedIn — danny-ruiz-boluda
• Location — Torrevieja, Spain (available for relocation)

Hola, soy Danny — administrador de sistemas y redes (titulado ASIR), actualmente en el equipo de sistemas de Zataca Systems (Elche). Vivo en Torrevieja, abierto a moverme. Me gusta montar herramientas self-hosted que hacen la infraestructura más fácil de ver y operar, y ahora estoy profundizando en DevOps: CI/CD, Kubernetes, Terraform, Ansible y Prometheus/Grafana sobre mis propios proyectos. Si quieres hablar sobre oportunidades de sysadmin, DevOps, redes o cloud, escríbeme por email o LinkedIn.