Infrastructure Engineer

Simplex is looking for smart, curious, and driven individuals to join our technology team.

• 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 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

• 3+ years of experience as a System Administrator, Linux Administrator, or similar
• Thorough understanding of Linux (kernel, modules, file systems) with special emphasis on the network stack, especially multicast, and Open Onload
• 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, file systems)
• 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)

Annual base salary ranges from $125,000 to $200,000. Eligibility for a discretionary bonus and additional compensation and benefits including health/dental/vision insurance and 401(k) contributions.

• The Office: stocked kitchen, daily breakfast and lunch stipends
• Tuition Reimbursement available for professional development
• Employee Discounts to gyms, national brands, and more
• Access to a building gym and full cafeteria (Federal Reserve building)
• Charity Match up to $2,000 a year
• Fun Events: in‑person happy hours, celebrations, game nights, etc.

Simplex is an Equal Opportunity Employer