Infrastructure Engineer
$125k - $200kSimplex Trading
Infrastructure EngineerOur employees are truly our greatest asset. We have spent years building a team of talented, dedicated technologists, data-driven traders, and expert leaders with an emphasis on our core pillars: People, Process, Trading Edge, and Technology. Simplex is an in-office organization, helping to foster a collaborative and communicative culture.Career DescriptionSimplex 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.What Will You Be Doing?Develop and maintain monitoring and deployment systems (Systems and Network)Triage and respond to issuesPrepare and execute changes to the Linux environmentMaintain and deploy servers and workstationsProjects will be completed both independently and as a part of a team, when necessaryThis is an in-office position, with occasional onsite work at several colocation facilities in Chicago, Aurora, and New JerseyInfrequent evening/weekend work to allow for change execution outside of trading hoursOther opportunities as assignedSkills and Experience:3+ years of experience as a System Administrator, Linux Administrator, or similarThorough understanding of Linux (kernel, modules, filesystems) with special emphasis on the network stack, especially multicast, and OpenOnloadExperience 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 issuesAbility to lift and move heavy equipment (40-50 lb regularly)Annual base salary ranges from $125,000 to $200,000, and is influenced by a number of factors, including qualifications and experience. This role is also eligible for an annual discretionary bonus, of which can be a significant portion of total compensation. This full time role is also eligible for other forms of compensation and benefits including health/dental/vision insurance, and 401(k) contributions.Infrastructure Engineer pay range$125,000 - $200,000 USDWhy Us?Founded in Chicago in 2004, Simplex is a leading, technology-driven, proprietary market-making firm. We work with the most advanced technology and software in the market, and we've continued to remain at the forefront of the industry by always focusing on innovation, automation, and data-driven analysis. We also leverage our experience and expertise to make strategic investments and capitalize on opportunities in the venture capital markets with promising, early-stage financial and technology start-ups.Plus, The Goods!Benefits: Excellent a la carte Medical/Dental/Vision (free employee coverage!), 401(k) match, generous parental leave!The Office: The kitchen is stocked with snacks, and beverages; you also have daily stipends for breakfast and lunch!Tuition Reimbursement: As an investment in our employees' careers and the company's future, we offer educational assistance to provide employees with professional development opportunities that increase their skills and enhance their contributions to the organization!Employee Discounts: To gyms, national brands, and more!Building: We are located in the Federal Reserve building. As a tenant, you have access to a building gym and a full cafeteria. We are easily accessible to all public transportation.Charity Match: We match up to $2,000 a year in donations to the charities of your choice!Fun Events: In-person happy hours, celebrations throughout the year, game nights, video game fun, and so much more!Simplex is an Equal Opportunity Employer. Simplex and its recruitment partners may use artificial intelligence (AI) tools to support certain aspects of the recruiting and hiring process. Final hiring decisions are made by humans. For all job postings, Simplex may use AI to review and analyze applications, resumes, interviews, and applicant responses. Simplex complies with applicable federal and state laws governing AI use. Applicants may still request reasonable accommodations. For more information related to AI or to request an accommodation, please contact View email address on click.appcast.io.
$200k - $230k
Optiver is looking for an experienced and hands-on Infrastructure Lead to join our US Enterprise Infrastructure Engineering team in Chicago. In this role, you’ll lead a small team of high-performing engineers, drive technical initiatives across our hybrid infrastructure...SuggestedWork at office$100.79k - $160.26k
...for building, managing, monitoring and operating DLA Pipers infrastructure systems and environments. These environments support the Firm... ...stay on current versions.Resolves escalated cases from other Engineers and Helpdesk. Performs fault resolution and root-cause diagnosis...SuggestedFull timeWork at officeRemote workVisa sponsorship- General Information Job Title Infrastructure Engineer Job ID 106481 Work Areas Technology & Engineering Employment Type Permanent Full-Time Location(s) Boston, Chicago Description & Requirements WHAT MAKES US A GREAT PLACE TO WORKWe are...SuggestedPermanent employmentFull timeWork at officeLocal areaWorldwide2 days per week1 day per week
- VPC Pizza Management, LLC is seeking a Network Engineer/Systems Administrator to support network and business applications across our Chicago-area restaurants and corporate offices. You will design and migrate networks, maintain security, and support a hospitality-oriented...Suggested
- ...AWS Infrastructure Engineer, Chicago, ILWe are seeking a Chicago-based AWS Infrastructure Engineer to help manage the company's IT operations, security and infrastructure. In addition, the AWS Infrastructure Engineer is responsible for overseeing and maintaining IT-related...SuggestedFor contractorsLive inWork at officeRemote workWork from homeMonday to FridayFlexible hoursWeekend work
$181k - $220k
...Senior Infrastructure EngineerAt Komodo Health, our mission is to reduce the global burden of disease. And we believe that smarter use... ...you help operate and optimize. You will partner closely with engineering, data, and security teams, meeting the security and compliance...Work experience placementWork at officeLocal areaFlexible hours- ...Infrastructure EngineerInvenergy is North America's largest privately held developer, owner, and operator of power infrastructure. With... ...and support the energy future.We are seeking an Infrastructure Engineer to help evolve, support, and strengthen our core IT systems and...
- ...About the job Senior Infrastructure Engineer EDX is seeking a full-time Senior Infrastructure Engineer, responsible for implementing and maintaining the architecture of a highly available, high performance distributed system that processes trades and interacts with the...Full time
$125k - $140k
...Posted: 2026-08-19Company: Addison GroupRole: Senior Network Engineer - VoIP / Unified CommunicationsLocation: Chicago, IL - OnsiteSalary... ...undergoing a significant modernization of its technology infrastructure.This is a great opportunity for a hands-on enterprise voice...Local area- ...restructuring.Ropes & Gray is an equal opportunity employer.OverviewThe Cloud Solutions Engineer is responsible for implementing and managing cloud and on-premises IT infrastructure, with a primary focus on Microsoft Azure and Microsoft Entra ID. Reporting to the Senior...Work at office
- SENIOR NETWORK ENGINEER REQUIREMENTS:3+ years experience in routing, core switching, Firewalls, VLAN, VPN, WLAN, TCP/IP, DNS, DHCP, monitoring tools, network topologies and Cisco network components3+ years experience in F5 BigIP load balancing3+ year's with Exp in a POS...
- ...Senior Infrastructure EngineerChicago, Illinois, United StatesAbout the Job Senior Infrastructure EngineerSenior Infrastructure Engineer: EDXEDX is seeking a full-time Senior Infrastructure Engineer, responsible for implementing and maintaining the architecture of a highly...Full time
- ...A global food retailer is seeking a Manager III - Hosting Services in Chicago, IL. This role leads infrastructure operations across UNIX, Linux, and virtualization platforms, ensuring platform resiliency and compliance. Applicants should be experienced in AIX and Red...
$200k - $300k
...Networks team designs, builds and maintains all the communications infrastructure that allows our high-capacity, low-latency trading and data... ...and 100 locations. We are looking for a Senior Network Engineer with experience designing and managing large environments to...Work at officeLocal areaImmediate startWorldwide$55 - $60 per hour
Chicago, ILHybridContract$55/hr - $60/hrSenior Network Engineer (Contract): A mission-driven national organization dedicated to advancing... ...a Senior Network Engineer (Contract) to join their IT Infrastructure team. This individual will be responsible for designing, implementing...Full timeContract workTemporary workFlexible hours- ...encourage you to apply.Job DescriptionPosition SummaryThe Network Engineer is responsible for designing, implementing, automating,... ..., and automation — building and maintaining enterprise-grade infrastructure while advancing GGP’s network operations maturity through scripting...Full timeWork at officeRemote work
- ...ID31244463Reference25-263033TypeContract Title - Lab Network Engineer Location - Chicago, IL Job Description The Select Group... .... Implementing, administering, and troubleshooting network infrastructure devices, including wireless access points, firewall, routers,...Local areaRemote work
$60 - $65 per hour
...and Responsibilities:Oversee the full lifecycle of network infrastructure, including the design, deployment, support, compliance and documentation... ...(NIST-CSF, COBIT). Collaborate with vendors, carriers, and engineering teams to resolve complex issues and drive large-scale...Hourly pay- ...Infrastructure EngineerAs an Infrastructure Engineer, you will:Define requirements, design, build, and test data center technology components.Act as a Subject Matter Expert (SME), collaborate with and manage the team, and contribute to critical team decisions.Provide...Local area
$200k - $300k
Hudson River Trading’s High Performance Computing (HPC) Network Engineering team designs and engineers the low-latency communications infrastructure that underpins our incredibly large GPU and CPU compute clusters. Our mandate is to architect, optimize, and scale the high...Work at officeLocal areaImmediate startWorldwide- ...highest quality and best solutions to our members.Job Purpose: This position is responsible for collaborating with Solutions Engineering, Infrastructure Operations, and Infrastructure Service Management teams in the design and build of infrastructure solutions/blueprints...Temporary work
$135k - $182.1k
...and to meet increasingly rigorous compliance requirements.** This role requires a solid technical understanding of Infrastructure Architecture engineering solution design experience, defining technical requirements for Security Administration access capabilities.Role Description...Full timeWork at officeShift workDay shift- ...Hybrid/On-site)About the Opportunity We are seeking a high-caliber Network Engineer to spearhead the design, implementation, and optimization of a high-performance, global networking infrastructure. This role is pivotal in maintaining a low-latency environment for...
- ...client is seeking a technical manager to lead their network engineering team with a vision and guidance to define and support The Company... ...team. Driving Standardization and Innovation in their infrastructure. Responsibilities: Develop a multi-year strategy and roadmap...Full time
$110.24k - $181.9k
...World Report.Location680 Lake Shore DriveJob DescriptionThe IT Network (VoIP) Engineer Lead is primarily responsible for the design, implementation and support of enterprise voice infrastructure and applications utilized by Lurie Children’s. This includes...Hourly payFull timePart timeWork experience placement$163.63k - $240.63k
...together because what we do matters. We provide the financial infrastructure that powers the global economy. As a leading provider of... ...Overview Cboe Global Markets is seeking a Principal Network Engineer to serve as a deep technical anchor for our global network infrastructure...Full timeWork at officeImmediate startShift work$180.63k - $233.75k
...together because what we do matters. We provide the financial infrastructure that powers the global economy. As a leading provider of... ...office work model. Role OverviewThe Sr. Manager of Network Engineering is a senior technical leader responsible for leading a high-...Full timeWork at officeImmediate startRemote workShift work$130k - $160k
...Description and ResponsibilitiesThe Senior Manager, Network Engineer is responsible for the design, deployment, and maintenance of... ...engineers and technicians to maintain and improve the network infrastructure. This includes collaborating on projects, communicating with...Full timeTemporary workApprenticeship$193.5k - $406.5k
TransUnion's Job Applicant Privacy NoticePersonal Information We CollectYour Privacy ChoicesTeam OverviewThe Global Infrastructure, Engineering & Operations (GIO) organization is responsible for delivering TransUnion's enterprise infrastructure, cloud platforms, operational...Full timeContract workTemporary workWork experience placementWork at officeWorldwideFlexible hours2 days per week- **Senior Network Engineer Pan-American Life Insurance Group (PALIG)****Location:** Oak Brook, IL | Hybrid Work Opportunities Available... ...improvement of PALIG’s enterprise network and voice infrastructure. This includes LAN/WAN/SD-WAN, wireless, security, and cloud...Work at office
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