Network Engineer – Datacenter (f/m/d)
GMX, WEB.DE & mail.com | IT System Administration / Network Administration | Karlsruhe / Munich | Permanent | Full-time | Experienced professionals | Reference ID: 308
- Your tasks
Are you passionate about shaping the future of data center networks with modern technologies and automation? As a Network Engineer, you’ll design and operate our next-generation datacenter network systems—powering millions of users across WEB.DE and GMX. Join a team that’s building a European alternative to email and cloud services, committed to privacy, digital sovereignty, and operating under European law.
Do you enjoy working with cutting-edge network technologies? Are you excited by automation and Infrastructure-as-Code? Do you want to help build secure, scalable infrastructure for millions of users?
- You will design, implement, and operate highly available datacenter network architectures.
- You will automate network operations using tools like Ansible, Terraform, and Python.
- You will collaborate closely with internal stakeholders to develop and implement technical solutions.
- You will help ensure 24/7 operational continuity as part of a shared team responsibility.
- Your profile
Do you have a degree in a technical field and several years of experience in building and operating complex network infrastructures? Are you confident working in agile, international teams and solving challenging networking problems? We believe the following skills and experiences will help you succeed in this role:
- Strong knowledge of protocols and technologies such as IEEE 802.1Q, BGP, IS-IS, VRF, EVPN, VXLAN, firewalling, overlay, and tunneling architectures.
- Experience with datacenter-grade network components from vendors like Cisco Nexus, Juniper, Arista, or similar.
- Proficiency in Linux-based systems and open-source routing/firewall components.
- Skilled in designing large-scale network solutions, including proof of concepts and creating high-level/low-level documentation.
- Bonus: Experience with Cisco ACI, Arista EVPN, or VMware NSX is a plus.
- Our benefits in detail
🏢 Lived corporate culture: Flat hierarchies, a culture of respect and appreciation, signatories of the Diversity Charter, open communication and no dress code
🎓 Wide range of further training: Internal and external training opportunities, LinkedIn Learning, language courses, talent development programs, conferences and mentoring
💡 TEC-Campus: Free choice between Linux, Mac, or Windows, slack days, conferences, lecture series, courses, open-source projects, community meetups and user groups
❤️ Active health care: Wellpass, free internal sports and fitness classes, health days, family & care support services, discounts at fitness centers, mental health first responder, fresh fruit and drinks for free
🚝 Mobility: Subsidy for job bike leasing, job ticket and relocation service if you live outside Germany
💻 Flexible working models: Home office options, flexible working hours and 30 days of vacation with the option for additional unpaid leave
💰 Financial benefits: Corporate benefits, company pension scheme, capital-forming benefits, occupational disability insurance and various partner discounts
🎉 Events: Summer and winter parties, sports tournaments and team events
We are brand. With GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communication platform in Germany, Austria and Switzerland.
We are future. Our services and apps simplify digital life from cloud storage to news and ID management.
You are at home. Your digital passion finds a professional home with us. Your strength makes us stronger, your expertise complements our ideas, your success becomes visible. Together we shape the digital future.
Diversity enriches. Different cultures, nationalities, genders, age groups, sexual orientations and religions as well as people with disabilities - we desire diversity and encourage it. Because only teams that reflect all facets of society offer the best framework conditions for creativity and make a company productive and distinctive. We value diversity and welcome all applications.

Apply now
We look forward to receiving your application, including your salary expectations and the reference number given above. Please use our online application form. If you have any questions about the position or the application process, please send us an email.
1&1 Mail & Media Applications SE
Recruiting & Candidate Management
Brauerstraße 48
D-76135 Karlsruhe
We are awarded!



