Senior Site Reliability Engineer (MAAS)

Job description

**Location:** Fully remote, EU timezone (CET ±2h) **Start date:** ASAP **Languages:** Fluent English required **Industry:** Cloud Computing / GPU Infrastructure ## About the Opportunity Pragmatike is hiring a **Senior SRE / Infrastructure Engineer** to help operate and scale a distributed infrastructure platform spanning **bare-metal GPU nodes, Kubernetes, virtualization, networking, and multi-site environments**. You’ll work close to the infrastructure itself, from **BMCs, hardware and MAAS provisioning** through Kubernetes, networking, observability, automation, and site operations. This is a hands-on role for someone who enjoys owning infrastructure end-to-end, building reliable systems, and automating everything that can be automated. Startup or hyper-growth experience is a strong plus: autonomy, ownership, and speed matter here. ## What You’ll Do - Operate and maintain large-scale **Linux infrastructure** across Debian/Ubuntu-based bare-metal and virtualized environments. - Own **MAAS-based bare-metal provisioning**, including region/rack controllers, PXE, commissioning, cloud-init, node lifecycle, and API/CLI automation. - Operate and maintain **production Kubernetes clusters**, including upgrades, node pools, networking, storage, security hardening, and troubleshooting. - Design and maintain multi-site networking across **VLANs, L2/L3 routing, bonded interfaces, VPNs, firewalls, and DNS**. - Automate infrastructure provisioning and operations using **Ansible, Bash/Python, OpenTofu/Terraform, and Git-based workflows**. - Build and maintain automated deployment workflows including **PXE, Preseed, and cloud-init**. - Operate observability platforms using **Prometheus, Grafana, Alertmanager, VictoriaMetrics/VictoriaLogs**, or comparable tooling. - Define and improve **SLIs, SLOs, alerting, and reliability practices** across infrastructure and platform services. - Lead infrastructure **incident response, troubleshooting, escalation, and post-incident improvements**. - Maintain on-call processes and operational coverage across distributed environments. - Work close to the hardware layer, including **IPMI/Redfish, BMCs, RAID, storage, hardware diagnostics, and GPU infrastructure**. - Manage virtualization platforms including **Proxmox, KVM/libvirt, OpenStack, or VMware**, including GPU passthrough where required. - Build and maintain internal infrastructure tooling for **host discovery, configuration, IPAM, hardware health, and operational automation**. - Own infrastructure lifecycle activities including **site onboarding, maintenance, decommissioning, drift detection, and operational runbooks**. - Work closely with engineering and cross-functional teams to improve reliability, resource utilization, and operational efficiency. ## What We’re Looking For - **5+ years of hands-on SRE, Infrastructure, Systems, or Platform Engineering experience.** - Expert-level **Linux administration**, particularly Debian/Ubuntu. - Strong production experience with **MAAS and bare-metal provisioning**. - Expert-level, hands-on experience operating **Kubernetes in production**, including cluster lifecycle, networking, storage, upgrades, and troubleshooting. - Strong network engineering skills across **VLANs, L2/L3 routing, bonding, VPNs, firewalls, and DNS**. - Strong automation skills with **Ansible, Bash and/or Python**. - Experience with **Terraform/OpenTofu and Git-based infrastructure workflows**. - Production experience with **Prometheus/Grafana or comparable observability platforms**. - Experience with **incident response, on-call operations, monitoring, alerting, and reliability practices**. - Experience with **Proxmox, KVM/libvirt, OpenStack, VMware, or comparable virtualization technologies**. - Experience with **bare-metal hardware, BMCs, IPMI/Redfish, storage, and hardware troubleshooting**. - Strong understanding of distributed systems, container orchestration, and infrastructure reliability. - Experience with infrastructure security including **RBAC, firewalls, network policies, secrets management, and security hardening**. - Ability to create **SOPs, runbooks, and operational processes from scratch**. - Comfortable working autonomously in a fast-paced, engineering-driven environment. ## Nice to Have - Experience operating **GPU infrastructure** or GPU-heavy Kubernetes/bare-metal environments. - Proxmox VE with **ZFS/Ceph and GPU passthrough**. - **VictoriaMetrics / VictoriaLogs** or similar large-scale observability platforms. - **NetBox** or other IPAM / infrastructure inventory platforms. - **Vault, SOPS, Atlantis**, or similar infrastructure security and automation tooling. - Experience with **Cloudflare APIs, DNS automation, or tunnels**. - Experience with **UniFi** or comparable site networking platforms. - Experience with **service mesh or advanced CNI implementations**. - Go experience, particularly for infrastructure tooling or custom exporters. - Experience with **Ceph or distributed databases** running on bare metal. - Experience operating infrastructure across multiple sites and timezones. - Experience establishing **SRE frameworks and reliability practices** in growing organizations. ## Why Join Us - **100% remote** with flexible working hours - High-impact role with significant **technical ownership and autonomy** - Work directly with **bare-metal, Kubernetes, networking, and GPU infrastructure** - International, engineering-driven team - Strong focus on **automation, reliability, and infrastructure at scale** - Opportunity to shape the architecture and operational foundations of a growing cloud platform *Pragmatike is committed to a fair, transparent, and inclusive recruitment process. We do not discriminate based on age, disability, gender, gender identity or expression, marital or civil partner status, pregnancy or maternity, race, religion or belief, sex, or sexual orientation.* *In accordance with GDPR, your personal data will be processed lawfully, fairly, and securely, and used solely for recruitment purposes, including sharing it with our client(s) for employment consideration.*