(#4479)We are looking for an experienced Site Reliability Engineer to ensure the stability, scalability, and operational excellence of a Kubernetes-based platform running in a hybrid environment. The project is entering a pivotal phase, with a major go-live planned for mid-February and a target audience of 75,000 users. User onboarding is already underway, with over 5,000 users connected and 15,000–20,000 expected to be active by year-end. While the system is stable, we anticipate increased activity and new challenges in January, February, and after the go-live - making this an exciting opportunity to make a real impact. The role focuses on performance optimization, scaling strategies, observability, and reliability engineering.Required Skills: 4+ years of experience as SRE / DevOps Engineer Strong hands-on experience with Kubernetes in production Experience working with hybrid infrastructure (on-prem + cloud) Solid knowledge of PostgreSQL performance tuning and scaling Experience with Qdrant or other vector databases Experience with Helm, Kubernetes autoscaling, and resource optimization Familiarity with observability stacks (Prometheus, Grafana, ELK/Loki) Understanding of performance engineering and load testing Experience with Linux systems and networking Strong troubleshooting and incident-management skills Nice to Have: Experience with STACKIT or other sovereign clouds Experience with PgBouncer Knowledge of SRE practices (SLO/SLI) Experience in regulated or public-sector environments German language skills Responsibilities: Operate and optimize hybrid infrastructure (on-prem & STACKIT) Manage and scale Kubernetes clusters Optimize Helm charts, resource usage, and autoscaling Conduct performance, load, and stress testing Ensure reliability, availability, and monitoring of production systems Tune and operate PostgreSQL Operate and optimize vector databases (e.g. Qdrant) Implement monitoring, logging, and alerting Support incident response and capacity planning We offer: Flexible working format - remote, office-based or flexible A competitive salary and good compensation package Personalized career growth Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) Active tech communities with regular knowledge sharing Education reimbursement Memorable anniversary presents Corporate events and team buildings Other location-specific benefits