Senior Linux Infrastructure Engineer
tastytrade · Chicago, Illinois
About this role
**Senior Linux Infrastructure Engineer** **Company:** tastytrade **Location:** Chicago, IL - Hybrid --- **About the Role** We are looking for a senior Linux engineer who is equal parts operator and builder. You will own the systems layer of our production environment - from the metal to the configuration management code. This is a hands-on role: you will jump into incidents, tackle challenging engineering problems, design systems that scale, and evaluate new software and architectures. This is not a role where the abstractions hide the machine. You are expected to be curious about what is underneath and to be the person other engineers come to when a system is behaving in a way nobody can explain. --- **What You'll Do** • **Own Linux performance** - Diagnose and tune systems under real production load: CPU scheduling and NUMA placement, memory and page cache behavior, disk and filesystem I/O, and network stack tuning. • **Lead troubleshooting on hard problems** - Work incidents methodically, form hypotheses, and narrow the search. Write postmortems and future-proof the environment. • **Write and maintain configuration management code** - Build infrastructure declaratively with Salt, Ansible, Chef, or Puppet with application-code standards. • **Run containerized workloads** - Build, deploy, and operate services on Kubernetes or Nomad, including scheduling, resource limits, and failure modes. • **Automate in Bash and Python** - Replace manual runbooks with tooling and streamline repeatable work. • **Operate core network services** - Troubleshoot TCP/IP and manage DNS and DHCP as production services. • **Operate the traffic and data tier** - Configure Nginx and HAProxy, and support Redis and RabbitMQ in production. • **Manage virtualization** - Provision and maintain guests across VMware, Xen, or KVM. • **Handle secrets properly** - Use Vault for secret storage, dynamic credentials, and rotation. • **Own observability** - Maintain log aggregation and alerting systems with signal-focused alerts.
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