Senior System Engineer - Load Balancer Platform

Your Tasks

Are you ready to take ownership of a global Loadbalancer platform serving millions of users? As a System Engineer, you’ll architect, secure, and operate high-throughput infrastructure based on HAProxy and Envoy, all within a GitOps-driven environment. You’ll collaborate across teams and act as a technical advisor - your work will directly influence the reliability and efficiency of our production systems.

We operate at serious scale: 3.5 billion logins per day, hundreds of petabytes of storage, and nearly half an exabyte of internet traffic annually. Join a team that’s building a European alternative to email and cloud services, committed to privacy, digital sovereignty, and operating under European law.

• You own the design, operation, and continuous evolution of our Loadbalancer platform.
• You define rollout strategies such as Canary Routing and Blue/Green deployments, and implement them via GitOps pipelines.
• You monitor and optimize key metrics like request rates, response times, and error rates.
• You establish and enforce security policies for TLS, SNI, header handling, rate limiting, and circuit breakers.
• You present architectural concepts and platform strategies to internal and external stakeholders.

Your Profile

Do you have a degree in Computer Science or equivalent experience? Are you confident in designing and operating platforms in large-scale environments? Do you thrive in cross-functional collaboration and technical leadership? We believe the following skills and experiences will help you to be successful in this role:

• 5+ years of experience in designing and operating infrastructure at scale.
• Expertise in HAProxy and/or Envoy, including advanced configuration (ACLs, TLS termination, routing strategies).
• Strong proficiency in GitOps tools (e.g., ArgoCD, GitLab Runners), CI/CD pipelines, and secret management (e.g., Vault), as well as Debian packaging.
• Programming experience in Lua, WASM, Python, or Bash, along with strong debugging skills using logs, Prometheus metrics, and tracing tools.
• Excellent communication skills in English, with the ability to advise stakeholders and lead cross-functional initiatives.

Our Benefits

• Our corporate culture: 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 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 of holiday, hybrid working, 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.

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