Daniel Sierra Caramés

Work Experience

1. Mar 2025 – Present

   System Engineer

   Nuek – Minsait Payments UST · Madrid

   • Administer and operate Linux systems in critical production environments across 15+ cloud projects.
   • Manage 9 Kubernetes clusters — 6 on GKE and 3 on OKE — covering development, pre-production and production environments, plus internal clusters running CI/CD pipelines, deployments and image builds.
   • Operate GCP and OCI cloud infrastructure: deployments, resource and architecture configuration, incident resolution.
   • Administer 10 Oracle Data Integrator VMs: 7 used for migration work and 3 running the development, pre-production and production ETL platform for a major banking client, which processes hundreds of files and gigabytes per day.
   • Apply data model and data changes in Oracle and PostgreSQL databases during deployments and maintenance windows.
   • Proactive monitoring across Datadog, OCI Monitoring and GCP Logging: build and tune dashboards and 500+ alerts covering the platform, catching and mitigating issues before they reach production.
   • Provide advanced technical support to development teams, ensuring operational continuity and collaborating on application- and infrastructure-level issues.
   • 24/7 on-call for Getnet's cloud infrastructure on a two-person rotation of alternating weeks: around 10 alert notifications a week and an out-of-hours callout roughly every two weeks.

2. Mar 2024 – Mar 2025

   Junior System Engineer

   Minsait Payments UST · Madrid

   • Level 2 technical support within Minsait Payments' Technology Support Unit for the Getnet project.
   • Administered and maintained GCP and OCI cloud environments: instances, networking, storage, and permissions.
   • Resolved incidents across development, pre-production, and production environments, documenting root cause and corrective actions.
   • 24/7 on-call support for production environments, handling incidents outside business hours.
   • Collaborated with development and operations teams on continuous process improvement.

3. Jan 2023 – Jul 2023

   Helpdesk / IT Support

   Real Canadian Superstore · Vancouver, BC, Canada

   • Level 1 support for the public and internal staff at a high-volume hypermarket in Canada.
   • Resolved basic hardware and software issues.
   • Developed customer service and technical communication skills in English in an international environment.

4. Mar 2022 – Sep 2022

   Systems Administrator

   Hopla! Software · Madrid

   • Administered Kubernetes and OpenShift clusters at a cloud-sector startup.
   • Supported and operated Telefónica Tech's Cloud Garden project (now TROS), a multicloud management platform.
   • Handled deployment, monitoring, and incident resolution on the OpenShift platform.

5. Oct 2019 – May 2020

   Workstation Imaging Technician

   INFOREIN S.A. · Madrid

   • Created and installed images on hundreds of workstations daily for Spain's Social Security IT Management (GISS), later for the Ministry of Health.
   • Configured, deployed, and verified equipment per client-defined procedures and deadlines.
   • First professional experience in large-scale corporate IT environments.