Senior Site Reliability Engineer

Accountabilities

• Operate, maintain, and continuously improve Linux-based infrastructure, with a strong focus on Debian and Ubuntu environments.


• Deploy, manage, and scale production Kubernetes clusters across bare-metal, virtualized, and on-premise environments, overseeing upgrades, node pools, networking, storage, and security hardening.


• Design, implement, and maintain complex networking architectures covering VLANs, L2/L3 routing, VPNs, and multi-site connectivity.


• Build and maintain infrastructure automation using Ansible, Bash, Python, Git-based workflows, and GitOps practices, including automated provisioning through PXE boot, Preseed, and cloud-init.


• Deploy and maintain observability and monitoring platforms such as Prometheus, Grafana, Loki, ELK, and Graylog, ensuring operational data generates actionable insights.


• Lead incident response and escalation activities, troubleshoot complex infrastructure issues, and implement improvements that increase availability and reduce latency.


• Define and implement SLOs and SLIs across physical infrastructure, networking, virtualization, and software services to establish measurable reliability standards.


• Optimize alerting and monitoring pipelines while establishing effective on-call schedules to provide operational coverage across time zones.


• Create and maintain Standard Operating Procedures for recurring infrastructure operations, maintenance, troubleshooting, and incident management.


• Coordinate physical infrastructure maintenance, including hardware issues, periodic maintenance, and data-center operations.


• Manage virtualization and orchestration layers using technologies such as OpenStack, Proxmox, and VMware.


• Contribute to the overall architecture and evolution of infrastructure products, ensuring solutions remain scalable and reliable.


• Plan infrastructure capacity and resources for future initiatives based on projected demand and business growth.


• Partner with development teams to improve system quality, optimize resource utilization, and strengthen engineering practices.


• Collaborate with cross-functional stakeholders to align infrastructure priorities with broader product and customer needs.

Requirements

• Expert-level, hands-on experience operating Kubernetes in production, including cluster lifecycle management, networking, storage, security, and scaling.


• Strong network engineering expertise is essential, particularly across VLANs, L2/L3 routing, VPNs, and multi-site connectivity.


• Strong Linux systems administration skills, particularly with Debian and Ubuntu.


• Solid understanding of networking fundamentals and the ability to design and operate complex network architectures.


• Proven experience developing infrastructure automation using Ansible, Bash and/or Python, Git-based workflows, and GitOps methodologies.


• Practical experience with observability platforms such as Prometheus, Grafana, ELK, Loki, or Graylog.


• Experience working with virtualization technologies including OpenStack, Proxmox, and VMware.


• Experience with bare-metal provisioning and MAAS (Metal as a Service).


• Strong understanding of distributed systems and container orchestration.


• A process-oriented mindset, with the ability to create SOPs and operational procedures from the ground up.


• Experience managing production incidents, escalation processes, and on-call rotations.


• Ability to work independently and make sound technical decisions in a fast-paced, engineering-driven environment.


• Strong communication and collaboration skills, combined with a high level of technical ownership and alignment with team values.


• Fluent English is mandatory.


• Experience with service mesh technologies such as Istio or Linkerd, or advanced CNI implementations, is a plus.


• Knowledge of Cloudflare APIs, DNS automation, or tunnel configurations is advantageous.


• Experience with GPU infrastructure, node preparation, resource scheduling, security practices such as RBAC, firewalls, and network policies is beneficial.


• Familiarity with IT asset management or license tracking workflows is an advantage.


• Experience working across multiple time zones and establishing SRE or reliability frameworks within growing organizations is highly valued.

• 100% remote work within the EU time zone, with CET ±2 hours preferred.


• Flexible working hours designed to support autonomy and effective collaboration.


• High-impact position with significant ownership and the opportunity to influence infrastructure strategy.


• Opportunity to work with a modern technology stack spanning Kubernetes, cloud infrastructure, networking, virtualization, automation, and observability.


• Collaborative and international engineering environment with exposure to complex infrastructure challenges.


• Significant autonomy to shape operational processes, reliability practices, and technical solutions.


• Opportunity to contribute to ambitious cloud infrastructure initiatives with a strong focus on reliability, automation, and continuous improvement.

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