Senior Site Reliability Engineer

Quick Facts

• Role: Senior Site Reliability Engineer (Senior Cloud & Infrastructure Engineer)

• Work mode: Full-time

• Languages: Polish and English

Description

You will help move infrastructure from manual operations to a predictable, automated, and proactive hybrid environment. This role covers Kubernetes on on-premise and bare-metal, cloud-agnostic infrastructure architecture, Infrastructure as Code, and reliability engineering through observability, incident response, and SLA/SLI/SLO practices.

Responsibilities

• Deploy, maintain, and optimize Kubernetes clusters in on-premise and bare-metal environments.
• Develop a cloud-agnostic infrastructure architecture prepared for future hybrid and cloud environments.
• Design and build Infrastructure as Code with Terraform, Ansible, and Bash/Python scripts to reduce manual/repetitive work.
• Work with development teams to improve SaaS reliability by defining, measuring, and optimizing SLA/SLI/SLO.
• Diagnose complex infrastructure and networking issues across Linux, TCP/IP, DNS, reverse proxies, Kubernetes, and storage layers.
• Develop proactive observability using tools such as Prometheus, Grafana, and Loki (metrics, dashboards, alerts).
• Participate in incident handling, analyze root causes, and write technical post-mortems to prevent recurrence.
• Maintain existing Docker Swarm environments and supporting platform infrastructure.
• Work on network and storage infrastructure, including performance optimization and traffic to external S3-compatible object storage.
• Share knowledge and support implementation of automation, reliability, and modern DevOps/SRE standards.

Requirements

• Minimum 4 years of commercial experience as a Senior System Engineer, DevOps Engineer, SRE, or similar role.
• Practical experience with on-premise and bare-metal environments.
• Strong Kubernetes and Docker skills, including independent troubleshooting of networking topics (CNI, Ingress).
• Excellent Unix/Linux administration and ability to troubleshoot at system and network levels.
• Experience with reverse proxies (e.g., nginx, HAProxy).
• Infrastructure as Code experience (Terraform) and automation with Ansible plus Bash or Python.
• Knowledge of SLA, SLI, SLO, monitoring, and incident handling.
• Observability experience with Prometheus, Grafana, and Loki.
• Experience with at least one major cloud (AWS, GCP, or Azure) and with object storage (S3/S3-compatible) including performance troubleshooting.
• Polish language skills and English at least B2 (primarily for technical documentation).

Benefits

• Employment model: UoP or B2B.
• UoP: 16,500–23,000 PLN gross; B2B: 120–165 PLN/hour net + VAT.
• 26 days of paid service suspension for B2B; 10 days of inability to provide services for B2B.
• Tools and equipment from day one; employee referral program.
• Training budget; free English lessons.
• Private medical care (Luxmed, package from 1 PLN); Multisport co-financing.
• “Day for U” extra paid day off for health prevention; menstrual leave; life insurance co-financing.
• Welcome pack, annual recognition gala, integration trips, holiday gifts, and a child starter kit.