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FRANCESC CASTELL
— EXPERIENCE

Five years, five roles.

From administering networks for municipalities to modernising AWS infrastructure for Tier-1 public sector clients. A trajectory from systems to cloud to AI-infused operations.

  1. Cloud Engineer · IThinkUPC

    May 2025 — Present
    Barcelona, Catalonia Hybrid 1 yr 3 mos Current

    Architecting and managing multi-cloud infrastructure (AWS, Azure) for 130+ government, enterprise, and NGO clients. Leading internal tooling development and the adoption of AI-driven operations.

    • Designed and deployed CloudIA, an AI-powered DevOps assistant (Bedrock AgentCore) that reduces incident diagnosis from 6 days to minutes across 130+ client accounts.
    • Built Homer CLI (Python) to abstract Terraform and Packer workflows, saving the team ~5 hours/week company-wide.
    • Developed 15+ reusable Terraform modules standardizing deployments and ensuring ENS compliance across all environments.
    • Orchestrating advanced GitHub Actions pipelines with automated testing, security scans and seamless rollouts.
    • Designing end-to-end monitoring with Centreon, Grafana, and CloudWatch for real-time visibility.
    AWS Azure Terraform Packer GitHub Actions Centreon Grafana Python n8n
  2. SysAdmin & Cloud Services Administrator · SII Group Spain

    Sep 2024 — May 2025
    Barcelona, Catalonia Remote 9 mos

    Managed infrastructure and cloud environments for ~30 municipal and corporate clients, handling an average of 20 incidents per day across hybrid environments.

    • Resolved ~400 incidents per month across cloud (AWS, Azure) and on-premise environments, maintaining strict SLA compliance.
    • Administered cloud infrastructures, troubleshooting issues spanning compute, networking, storage, and identity services.
    • Coordinated cross-team efforts to implement infrastructure improvements for critical municipal services.
    Windows Server Azure Networking Hyper-V Active Directory
  3. Network Administrator · SII Group Spain

    Jun 2023 — Aug 2024
    Barcelona, Catalonia Hybrid 1 yr 3 mos

    Ensured the reliability and performance of network infrastructure at a national scale, resolving complex incidents and implementing continuous improvements.

    • Managed and maintained network infrastructure for municipal and corporate clients nationwide.
    • Collaborated with cross-functional teams to design and deploy network improvements (VLANs, VPNs, firewalls).
    • Developed diagnostic scripts (Bash) to streamline recurring troubleshooting tasks and reduce manual investigation time.
    Networking Windows Server Cisco VPNs
  4. Network Administrator · Cototo Wifi

    Jun 2021 — Nov 2021
    Ciudadela, Balearic Islands Part-time · On-site 6 mos

    Deployed network infrastructure for residential and commercial clients at a regional ISP, delivering end-to-end connectivity solutions.

    • Deployed and configured network infrastructure for ~100 client sites over 6 months.
    • Designed network topologies for new deployments based on site requirements and coverage needs.
    • Provided L2/L3 technical support for connectivity and performance issues.
    LAN/WAN MikroTik Ubiquiti Fiber
  5. Network Systems Administrator · Internship · Parlament de les Illes Balears

    Jan 2021 — Jun 2021
    Palma, Balearic Islands On-site 6 mos

    Managed network infrastructure and systems for the regional parliament, supporting secure communications for all users and departments.

    • Configured and maintained managed switches and VLANs, ensuring proper traffic segmentation.
    • Developed automation scripts (Python) for Cisco router configuration, Fortinet firewall management, and VMware.
    • Administered Cisco ASA firewalls and Fortinet appliances in line with government standards.
    Cisco IOS ASA Python VLAN