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# Infrastructure Engineer

- **Company:** Simplex Trading, LLC
- **Location:** Chicago, United States
- **Experience:** Experienced
- **Salary:** $125,000.0 - $200,000.0
- **Contract:** Permanent contract
- **Skills:** AWK (Programming Language), Intelligent Platform Management Interface, Bash Shell, Protocol Stack, Linux, File Systems, Memory Management, Perl (Programming Language), Python (Programming Language), Multicasting, Nagios, Ansible, Simple Network Management Protocols, Sed (Programming Language), Scripting, Git, Simplex Dental Software, Grep
- **Published:** September 4, 2026
- **Apply:** https://startup.jobs/infrastructure-engineer-simplex-trading-8114364

## About the Role

Simplex is looking for smart, curious, and driven individuals to join our technology team. Technology at Simplex is the core of the business. We are a leading technology-driven proprietary market-making firm. You will be someone excited by challenges and proactive in problem-solving., * 3+ years of experience as a System Administrator, Linux Administrator, or similar

 * Thorough understanding of Linux (kernel, modules, filesystems) with special emphasis on the network stack, especially multicast, and OpenOnload
 * Experience working with Linux and standard tools (bash, grep, sed, awk) and scripting languages (Python, Perl, bash)
 * Understanding of Linux concepts (kernel, modules, memory allocation, filesystems)
 * Familiarity with common server technologies (IPMI, SNMP), or software (Nagios, Ansible, dnf/rpm, git)
 * Experience troubleshooting complex performance issues
 * Ability to lift and move heavy equipment (40-50 lb regularly)

## Description

* Develop and maintain monitoring and deployment systems (Systems and Network)
 * Triage and respond to issues
 * Prepare and execute changes to the Linux environment
 * Maintain and deploy servers and workstations
 * Projects will be completed both independently and as a part of a team, when necessary
 * This is an in-office position, with occasional onsite work at several colocation facilities in Chicago, Aurora, and New Jersey
 * Infrequent evening/weekend work to allow for change execution outside of trading hours
 * Other opportunities as assigned


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