Infrastructure Engineer

Simplex Trading; Chicago (IL); On-site; USD 125,000 - 200,000; Full time

Benefits offered by this job

Stocked kitchen

Tuition Reimbursement

Employee Discounts

Access to gym and cafeteria

Charity Match

Job summary

A technology firm in Chicago is seeking a knowledgeable System Administrator to enhance their Linux environment. Responsibilities include system monitoring, issue triage, and server management. The ideal candidate will have over 3 years of Linux experience and skills in scripting. The position offers an annual salary range of $125K to $200K along with bonuses, health insurance, and unique workplace benefits such as meal stipends and professional development support.

Qualifications

• 3+ years of experience as a System Administrator or similar role.
• Thorough understanding of Linux including kernel and network stack.
• Experience with standard Linux tools and scripting languages.

Responsibilities

• Develop and maintain monitoring and deployment systems.
• Triage and respond to system issues.
• Prepare and execute changes in the Linux environment.

Skills

System Administrator

Linux expertise

Scripting (Python, Perl, bash)

Troubleshooting

Knowledge of server technologies (IPMI, SNMP)

Ability to lift heavy equipment

Tools

Nagios

Ansible

git

Job description

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

What will you be doing?

• 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

Skills and Experience

• 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)

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.

Benefits

• 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