Sr. Linux Platform Engineer (Chicago)

A prestigious company is looking for a Senior Linux Platform Engineer. This role is focused on Linux infrastructure, performance, reliability, etc. Also needed for this role is experience with Python, Bash, Ansible, SaltStack, Kernel Tuning, Kubernetes, etc.

Responsibilities :

• Managing and improving our Linux-based infrastructure with a focus on performance, reliability, and scalability.
• Designing, deploying, and maintaining on-premises Kubernetes clusters and containerized workloads.
• Developing and maintaining system-level software, middleware, and APIs to support internal platforms and services.
• Automating system workflows and infrastructure tasks using Python, Bash, and configuration management tools like SaltStack.
• Building and maintaining RPM packages and internal software repositories.
• Collaborating with Application Support (SRE), Development, and Security teams to ensure secure, automated CI / CD and platform integration.
• Diagnosing and resolving complex system-level issues involving the OS, network, or container runtime.
• Implementing hardened security configurations, including system hardening, secure communications, and identity / access integration.
• Participating in an on-call rotation to support critical infrastructure services.
• Documenting architectures, tools, and operational processes to support long-term maintainability.

Qualifications :

• 5+ years of experience in Linux systems administration and infrastructure / platform engineering.
• Production experience managing Kubernetes, preferably in bare-metal or on-premises environments (e.g., with kubeadm, RKE, or OpenShift).
• Strong scripting and automation skills in Python and Bash.
• In-depth knowledge of Linux internals, kernel tuning, and performance diagnostics.
• Hands-on experience with SaltStack (preferred), Puppet, or Ansible for configuration management.
• Familiarity with observability tools such as Prometheus, Grafana, or Loki.
• Solid understanding of core infrastructure protocols and services (TCP / IP, DNS, NTP / PTP, DHCP, etc.). Experience managing CI / CD pipelines with tools such as Jenkins, GitLab, or similar.