Staff Network Reliability Engineer (f/m/d)

IONOS SE; Berlin; Hybrid; EUR 90.000 - 130.000; Vollzeit

Benefits dieser Stelle

Hybrid working model

Training and development opportunities

Employee discounts

Office near transport connections

Zusammenfassung

IONOS SE in Berlin seeks a senior/staff Network Engineer to own reliability of large production networks across data centers. You will define health metrics, lead major incident response, and drive automation with AI-driven insights.

You will work in a hybrid setup with close collaboration across global teams, shaping observability, SLOs, and lifecycle practices while applying cutting-edge AI to network operations.

Qualifikationen

• Extensive hands-on experience operating large-scale production data center networks.
• Deep Layer 2/3 routing knowledge: BGP/OSPF and VXLAN with BGP/EVPN.
• Multi-vendor operations across Juniper and Cisco; SONiC and NetBox familiarity is a plus.
• Strong Linux fundamentals and the toolset (bash, tcpdump, iptables, git).
• Network automation with Python using Ansible and CI/CD on GitLab.
• A reliability-engineering mindset: SLOs, observability, incident command, postmortems.
• Fluent English for international teams; German is a plus.

Aufgaben

• Own reliability of the physical fabric, SDN overlay, and VNF across IONOS data centers.
• Set service level objectives and drive down unplanned downtime.
• Lead incident response on major network incidents and run postmortems.
• Remove toil through automation with NRE Automation on pipelines and tooling.
• Apply AI to operations: anomaly detection, automated diagnosis, and remediation.
• Strengthen observability and shape lifecycle, upgrades, and capacity practices.
• Collaborate with NRE Provisioning on clean handovers.
• Share the on-call rotation covering the responsibilities listed.

Kenntnisse

Large-scale networks

BGP/OSPF routing

VXLAN/BGP-EVPN

Multi-vendor (Juniper, Cisco)

Linux fundamentals

Python automation

GitLab CI/CD

AI in operations

Observability/SRE

English fluency

German language (nice to have)

Tools

Juniper

Cisco

SONiC

NetBox

GitLab

Jobbeschreibung

NRE Operations runs the data center networks for the entire IONOS group: the physical fabric and underlay, the SDN overlay, and the virtual network functions on top, across dozens of data centers. We are looking for a senior or staff-level engineer who operates large production networks with a reliability mindset. You define what "healthy" means, catch problems before customers do, lead the hardest incidents, and partner with NRE Automation to push routine operations toward zero manual steps. AI is central to how we work, both to make the network smarter and to make each engineer faster.

Tasks

• Own reliability of the physical fabric, SDN overlay, and virtual network functions across all IONOS data centers. Set service level objectives and drive down unplanned downtime.
• Lead incident response on major network incidents and run postmortems that produce lasting fixes.
• Remove toil through automation, working with NRE Automation on pipelines and tooling for lifecycle, patching, and service configuration.
• Apply AI to operations: anomaly detection, automated diagnosis, config generation and validation, and automated remediation, with the judgment to know when AI output is trustworthy.
• Strengthen observability so problems surface before they reach customers, and shape lifecycle, upgrade, change-management, and capacity practices.
• Collaborate with NRE Provisioning on clean handovers.
• Share the on-call rotation covering the above.

Qualifications

• Extensive hands-on experience operating large-scale production data center networks (5+ years for Senior, longer for Staff).
• Deep Layer 2 and Layer 3 knowledge: routing (BGP, OSPF) and VXLAN with BGP/EVPN.
• Multi-vendor operations across Juniper and Cisco; SONiC and Netbox familiarity is a plus.
• Strong Linux fundamentals and the toolkit that goes with them (bash, tcpdump, iptables, git).
• Network automation you have built, using Python with Ansible and CI/CD on GitLab.
• A reliability-engineering mindset: SLOs, observability, incident command, postmortems, designing out toil.
• Fluent, critical use of AI in daily engineering, plus a track record or credible ideas for applying AI to network operations.
• Fluent English for international teams; German is a plus. Ownership and a calm approach when things break.

Benefits

• Hybrid working model.
• Flexible working hours through trust-based working hours.
• At some locations a subsidized canteen and various free drinks.
• Modern office space with very good transport connections.
• Various employee discounts for activities and products.
• Employee events such as summer and winter parties, as well as workshops.
• Numerous training and development opportunities.
• Various health offers, such as sports and health courses.