Senior Engineer

CXC; Polska; On-site; PLN 180,000 - 260,000; Full time

Job summary

CXC is seeking a hands-on engineer to own third-line escalations and improve a large-scale on‑prem and container platform. You will work across Linux, Kubernetes, compute, storage and networking, diagnosing failures, restoring service, and delivering tested fixes that prevent recurrence.

Responsibilities include building and operating Kubernetes clusters, improving observability, automating provisioning and health checks, and managing server lifecycles from imaging to return to service.

Qualifications

• Hands-on production experience in platform, infrastructure, DevOps or reliability engineering.
• Deep Linux systems administration and troubleshooting.
• Strong production Kubernetes administration including control-plane and worker lifecycle.

Responsibilities

• Own third-line escalations across the platform, tracing failures through the workload, container, scheduler, operating system, network and storage layers.
• Build, operate and improve Kubernetes clusters and shared platform services, including scheduling, registries, persistent storage and observability.
• Write and maintain production automation using Ansible, Python or Bash, Git and CI/CD or GitOps pipelines.
• Carry out server lifecycle operations from imaging and role assignment through patching, reprovisioning and return to service.

Skills

Platform engineering

Linux administration

Kubernetes administration

Incident ownership

Tools

Ansible

Python

Bash

Git

CI/CD

GitOps

Job description

Provides hands-on engineering and third-line technical support for a large-scale on-premises infrastructure and container platform. Owns complex faults from diagnosis through recovery and permanent resolution, and builds the automation, observability and reliability improvements that make the service dependable. Works across Linux, Kubernetes, compute, storage and networking, with the depth to investigate unfamiliar failures and turn findings into tested fixes.

Key responsibilities

• Own third-line escalations across the platform, tracing failures through the workload, container, scheduler, operating system, network and storage layers. Restore service, establish root cause and deliver fixes that prevent recurrence.
• Build, operate and improve Kubernetes clusters and shared platform services, including scheduling, registries, persistent storage and observability. Resolve control-plane, operator, networking and service-dependency failures.
• Write and maintain production automation using Ansible, Python or Bash, Git and CI/CD or GitOps pipelines. Automate provisioning, configuration, health checks and recovery, with testing, peer review and clear rollback paths.
• Carry out server lifecycle operations from imaging and role assignment through patching, reprovisioning and return to service. Validate host and network health against the supported hardware and software baseline.

Essential skills and experience

• Substantial hands‑on production experience in platform, infrastructure, DevOps or reliability engineering on Linux estates, including ownership of complex incidents and changes in business‑critical environments. Able to explain the diagnosis, decisions and outcomes of work you personally delivered.
• Deep Linux systems administration and troubleshooting: boot and service failures, kernel and driver compatibility, CPU and memory pressure, filesystems, networking and performance under load. Confident investigating beyond standard runbooks.
• Strong production Kubernetes administration, including control‑plane and worker lifecycle, container runtimes, Helm, operators, CNI networking and CSI‑backed storage. Able to diagnose cluster failures as well as deploy workloads.