Senior Infrastructure & Systems Engineer

Overview

We are seeking an experienced Senior Infrastructure/System Engineer to help operate, maintain, and improve our on-premise infrastructure environment. You will work hands-on with Linux systems, Kubernetes, RabbitMQ, Redis, and Elasticsearch, ensuring that our platforms are secure, scalable, and highly available. This role is ideal for a technically driven engineer who thrives in complex, production-grade infrastructure environments and enjoys optimizing systems for reliability and performance. This position offers a hybrid work mode , combining on-site collaboration with flexible remote work.

Key Responsibilities

• Manage and enhance Kubernetes clusters, including configuration, upgrades, scaling, and deployment automation using Helm and Docker.
• Operate, maintain, and optimize Linux-based systems in an on-premise datacenter environment.
• Manage, monitor, and troubleshoot RabbitMQ clusters, ensuring message delivery reliability, scalability, and fault tolerance.
• Administer and optimize Redis, Elasticsearch, and MySQL databases for performance, stability, and data integrity.
• Support and execute database migration and infrastructure modernization projects within the on-prem environment.
• Implement and maintain infrastructure-as-code practices using Terraform, Ansible, GitLab CI/CD and Puppet.
• Maintain and improve monitoring, logging, and alerting systems (e.g., Prometheus, Grafana, Zabbix, ELK).
• Collaborate with development and product teams to support deployment pipelines and performance optimization.
• Participate in incident response, root cause analysis, and on-call rotations to ensure system reliability.
• Ensure all systems meet security and data protection requirements.

Qualifications

• 5+ years of hands-on experience in system or infrastructure engineering, focused on on-premise environments.
• Strong expertise in Linux system administration (Debian/Ubuntu or RHEL/CentOS).
• Deep understanding of RabbitMQ, including clustering, high availability, performance tuning, and troubleshooting.
• Experience managing and optimizing Redis and Elasticsearch in production.
• Solid practical knowledge of Kubernetes, Docker, and Helm, including cluster management, deployments, upgrades, and troubleshooting.
• Experience with infrastructure automation and configuration management using Terraform, Ansible, GitLab CI/CD and Puppet.
• Strong understanding of networking, including routing, firewalls, VPNs, and secure access.
• Experience with monitoring and observability tools (Prometheus, Grafana, Zabbix, ELK).
• Excellent problem-solving and analytical skills, with attention to performance, reliability, and maintainability.
• Familiarity with cloud providers such as AWS would be a plus.

Preferred Qualifications

• CKA (Certified Kubernetes Administrator) certification.
• Experience managing RabbitMQ, Redis, Elasticsearch, and MySQL at scale in production environments.
• Experience working with high-availability and distributed on-prem systems.
• Familiarity with container security and system hardening best practices.
• Knowledge of disaster recovery and business continuity planning for on-prem environments.

About Us

At ROMEO, we’re on a mission to connect 3 million queer people worldwide for Dates, Friends, and Love. As a Senior Backend Developer, you’ll play a crucial role in modernizing and maintaining our platform’s backend systems. Join our diverse team of 54 professionals based in Berlin at Erasys, where we offer a hybrid work environment with flexible options for both home and office work.