System Engineer - Application Networking (f/m/d) - onsite or remote / home office

at subsidary 1&1 Mail & Media Applications SE in Karlsruhe, Berlin or Munich
Full-time | Permanent | Professionals
Reference ID: 4336

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About us

With our strong brands GMX, WEB.DE and mail.com and over 42 million active users, we are the leading email and communications platform in Germany, Austria and Switzerland. From this strong market position, services and apps are developed that simplify users' digital lives - from office tools and cloud solutions to personal ID management.

Your Tasks

Are you interested in topics such as load balancing, Edge Gateways, DDoS Protection, and SDN in a highly available and load-intensive modern infrastructure for more than 43 million users? We handle massive operations: hundreds of petabytes of storage, 3.5 billion active logins per day, and nearly half an exabyte of internet traffic annually. We don’t just use technology; we push it to its limits, break it, then innovate on solutions that lead the industry forward. Our commitment to active-active and high-availability environments is proven and sustained.

You enjoy working in the context of such cutting-edge technologies, such as Kubernetes, and understand the concepts and requirements of highly available large-scale infrastructures? You’d like to work on innovative application networking standards that create real value for our customers and users? Do you believe that collaboration is the key to successful solutions? Then we are looking for you! Work with your team and colleagues to develop new application delivery and load balancing solutions for Germany's leading email and cloud providers WEB.DE and GMX.

• You will design, develop, and operate our future application network infrastructure with several distributed data centers in close cooperation with experts and colleagues and will be involved in architectural decisions.
• You evaluate and assess new technologies and products in the areas of load balancing, edge gateways, firewalls, web application firewalls, DDoS protection and SDN.
• You will work "hands-on" on sustainable solutions from concept via go-live to shutdown, including automating processes and creating transparency about the status of systems.
• You are the contact person for technical questions, interface between data center and application operations and support colleagues in the use and optimization of load balancing.
• You keep the systems running, identify anomalies and get to the bottom of them - also as part of a 24/7 on-call service.

We Appreciate

You have several years of experience in the operation and development of high-performance (application) networks and load balancer architectures? You have a technical degree or a comparable qualification? You strive for Infrastructure-as-Code, and quality and sustainability are your focus? You are passionate about agile and DevOps principles and continuous learning in a collaborative environment? You are a true team player, and your work attitude is "hands-on"? Then we are looking forward to your application!

• You are familiar with technologies such as L7 load balancers and the relevant protocols such as HTTP and TLS, ideally already in interaction with Kubernetes.
• You already have experiences with L3 routing, BGP and VXLAN and are interested in systems for attack detection and defense on application (WAF) and network level (DDoS).
• You have solid methodological skills in design and architecture of scalable infrastructures and are familiar with Git and CI/CD pipelines.
• You are Linux literate and an advocate of smart use of automation frameworks.
• You have strong communication skills in English and are enthusiastic about modern network architectures.

What else we would like to tell you

• Our corporate culture: „You“ culture and no dress code, flat hierarchies, open and transparent communication
• Individual development opportunities: diverse training courses, e-learning and internal communities, language courses, mentoring
• Events: Slack Days, open source projects, meet-ups
• Relocation service: support with the relocation to Germany
• Benefits and additional services: company pension scheme, capital-forming benefits, discounts on own products, job ticket, bike leasing, corporate benefits portal
• Attractive working conditions: 30 days holiday, hybrid working 2 days home office/week or remote work, full-time and part-time arrangements, free choice between Linux, Mac or Windows
• Social: team events, summer and winter parties, family and care service, sports and fitness programmes, subsidised canteen, free fruit and drinks, health courses
• Topics that are also important to us: Sustainability, diversity and our values and leadership principles - find out more on our website mail-and-media.com

apply online now