Staff Infrastructure Engineer

Technology Lisbon, Portugal

Madrid, Spain

Dublin, Ireland

Full-time

1GLOBAL is a technology-driven global mobile communications provider helping enterprises and consumer brands deliver seamless connectivity worldwide. Powered by a best-in-class telecom platform, proprietary eSIM technology, and its own mobile core network across 15 countries, 1GLOBAL operates as a fully regulated telecommunications provider in 43 countries.

Founded in 2022, 1GLOBAL has rapidly become one of Europe's fastest-growing telecom technology companies, connecting more than 80 million people and devices globally. Our customers include leading banks, multinational enterprises, global retailers, travel companies, payment service providers, and digital-first businesses.

About the Role You will own the architecture and long-term technical strategy of our private cloud platform for compute and networking, distributed storage, and Metal as a Service (BMaaS). You will lead the design and rollout of new data center deployments, define the standards that the wider Infrastructure team builds to, and act as the technical authority on private cloud, distributed storage, and bare-metal automation across the organization. You will work hands-on while influencing the roadmap, mentoring senior engineers, and partnering with DevOps, IP Network, Security, and SRE leadership to ensure our platform scales reliably across regions.

Architect and Evolve the Private Cloud : Own the end-to-end architecture of our OpenStack-based private cloud (Nova, Neutron, Cinder, Glance, Keystone, Placement, Octavia, Designate) across multiple regions and data centers.

Lead Ceph at Scale:

Design, deploy, and operate large Ceph clusters, tiering, replication strategy, performance tuning, and lifecycle upgrades.

Operate Bare Metal as a Service : Architect and operate an Ironic-based BMaaS platform integrated with OpenStack and/or Kubernetes, covering hardware enrollment, inspection, image deployment, network provisioning, and lifecycle management at fleet scale.

Data Center Expansion : Lead the technical design of new data center buildouts, and bare-metal automation, defining reference architectures, hardware standards, and capacity models.

Infrastructure as Code:

Set the standards for IaC across the platform using Terraform, Ansible, Packer, and configuration management - including OpenStack lifecycle tooling (e.g. Kolla-Ansible, OpenStack-Ansible, Charmed OpenStack, etc).

Networking Architecture:

Define the SDN strategy (OVN/OVS), tenant networking, provider networks, BGP/EVPN integration with the underlay, and high-performance datapaths (SR-IOV, DPDK) for latency- and throughput-sensitive workloads.

Kubernetes on Bare Metal:

Architect Kubernetes platforms running on Ironic-provisioned hardware and OpenStack, including service mesh, CNI selection, and integration with Ceph CSI for persistent storage.

Performance, Capacity, and Cost:

Drive capacity planning, performance benchmarking, and TCO modeling for compute, storage, and bare-metal fleets - ensuring efficient resource utilization and predictable scaling.

Reliability and Operability:

Partner with the SRE team to define SLIs/SLOs for platform services, design failure domains, validate disaster recovery, and ensure operational maturity of every new component introduced.

Security and Compliance:

Work closely with Security to harden the platform end-to-end - secure boot, image signing, IAM (Keystone federation, OIDC, LDAP/AD), tenant isolation, and compliance with CIS, ISO 27001, and GDPR.

Technical Leadership : Mentor senior and mid-level engineers, lead design reviews, write RFCs and architecture decision records, and represent Infrastructure in cross-functional technical forums.

Support and Troubleshooting : Act as the deepest escalation point for the platform; participate in on-call for critical incidents, lead complex root-cause investigations across compute, storage, and network layers.

Requirements Must-haves

Experience:

Minimum 8 years in infrastructure engineering, with a track record of architecting and operating large-scale production platforms.

OpenStack Expertise:

Deep, hands-on experience designing, deploying, and operating production OpenStack clouds — including upgrades, HA control plane design, multi-region topologies, and at least one major lifecycle tooling stack (Kolla-Ansible, OpenStack-Ansible, or equivalent).

Ceph Expertise : Proven experience operating Ceph clusters in production, including CRUSH design, performance tuning, troubleshooting OSDs/MONs/MDS, RGW at scale, and Ceph version upgrades.

Ironic / BMaaS : Hands-on experience with Ironic for bare-metal provisioning at fleet scale, including driver selection (IPMI, Redfish), inspection, cleaning, deployment workflows, and integration with Nova or standa