Staff System Engineer - DNS / DHCP / Automation (m/f/d)

We are Europe's leading platform for cloud services and hosting services. We successfully accompany our customers in their company development. For our company success, over 4000 employees are active in several countries worldwide to meet the requirements and wishes of our 8.5 million customers.

We are a brand of United Internet AG, a listed company with around 10,200 employees.

We promote the development of our employees and their different talents, interests and languages. You operate, harden, and evolve our authoritative and recursive DNS, DHCP, forward-proxy, DNS and IP Management (DIM), and NTP services so You stay boringly reliable at internet scale You automate everything that should be automated, using infrastructure as code in Puppet, reviewed and version-controlled, and remove the toil that does not need a human You instrument and measure by building the metrics, dashboards, and signals that tell us what our services are actually doing, because we cannot improve what we cannot see You drive root-cause analysis and lasting fixes through structured ITIL Incident, Problem, Risk, and Change management, making our work and challenges transparent on purpose You take part in the team's on-call rotation for this KRITIS/NIS2 infrastructure, with your turn coming up roughly once a month, and use what you learn on-call to make the next on-call quieter

You have experience with DNS / DHCP / proxy / time technologies search as PowerDNS (authoritative, recursor, dnsdist), ISC DHCP (experience with or appetite for Kea is welcome), Squid, and chrony You are skilled in platform and automation tools like Enterprise Linux 9, Puppet (GitOps), BIRD, rsyslog, and collectd You are proficient in languages search as Python, Go, Java, Bash, and the classic Unix toolbelt (awk, sed, git) that still does more than people expect You have experience with data technologies like ClickHouse, MariaDB, and PostgreSQL You do not need to have mastered all of these on day one, but you are the kind of engineer who is comfortable for the right one and going deep when it matters You have operated DNS, DHCP, or comparable network services in production, ideally at scale and under real reliability You read RFCs for fun, debug with packets captures, and are not satisfied by ''it works again'' without knowing why it broke You automate by default and configuration as code You bring radical candor, saying the uncomfortable thing early in service of the work, not the ego You think in terms of blast radius, using AI-assisted tooling in development and test workflows, but ensuring production changes are always human-gated, as risk awareness is a feature, not a brake

Hybrid working model and flexible working hours through trust-based working hours Modern office space with very good transport connections, and at some locations, a subsidized canteen and various free drinks Various employee discounts for activities and products Numerous training and development opportunities to enhance your skills Various health offers, search as sports and health courses, to keep you fit and healthy Employee events such as summer and winter parties, as well as workshops, to foster team spirit