Top Systems Engineer Jobs in Chicago, IL

Lead reliability, performance, and operational excellence for large-scale ad-tech distributed systems. Design and operate monitoring, incident response, capacity planning, automation, and secure production infrastructure. Mentor engineers, influence architecture for production readiness, run on-call rotations, and drive continuous improvement of engineering operations and observability.

The IT Systems Engineer will architect and maintain Tempo's IT infrastructure, focusing on identity management, endpoint security, and automation, ensuring efficient provisioning and compliance.

Develops and maintains complex software applications and operating systems, defining specifications, designing software, hardware, and communications architectures, and ensuring compliance with DoD and open-systems standards. Responsibilities include coding, testing, debugging, documentation, quality assurance, software evaluation, systems maintenance, technical analysis, and directing other personnel. The role also requires business intelligence, analytics, data modeling, dashboard design, and modern security solution experience.

Supports and improves enterprise hybrid infrastructure across Linux, Windows, Azure, and on-premises environments. Responsibilities include VoIP and telecommunications support, application and systems troubleshooting, Microsoft 365 administration, vulnerability remediation, monitoring, disaster recovery, documentation, incident response, and on-call support. The role collaborates with technical teams, stakeholders, vendors, and leadership to deliver reliable infrastructure solutions.

Lead development and integration of Salesforce-centered GTM systems: build Apex/LWC solutions, design event-driven integrations, optimize data flows to Snowflake, manage CI/CD with Gearset/Git, write SQL for reporting and data quality, troubleshoot production, and mentor developers while advancing AI-enabled, composable CRM automation.

Implements and supports client desktop, server, networking, security, backup, and cloud technologies in an MSP environment. Provides second-level service desk escalation, remote troubleshooting, onsite support, project engineering, documentation, ticket management, status reporting, and client communication. The role owns resolution time, customer satisfaction, utilization, and SLA metrics while maintaining certifications and adapting to new platforms.

Lead CICS systems engineer responsible for CICS engineering, maintenance, performance tuning, debugging and dump analysis in a 24x7 Sysplex/CICSPlex environment. Interface with developers and operations, perform upgrades and SMP/E maintenance, monitor with Sysview/CICS tools, support WebSphere MQ and COBOL applications, and provide on-call support to resolve production issues.

Provides remote and on-site IT support for clients, diagnosing and resolving hardware, network, and software issues. Maintains knowledge of client environments and performs major technology migrations involving Exchange, Active Directory, and other platforms. The role requires strong networking, Windows infrastructure, troubleshooting, documentation, communication, prioritization, and customer-service skills, along with process improvement and continuous learning.

Leads the overall systems engineering effort for complex defense systems, directing engineering activities and ensuring compliant processes and work products. Collaborates across hardware, software, and firmware disciplines, manages requirements decomposition, systems integration and testing, verification, technical presentations, cost accounts, schedules, and MBSE artifacts. The role is full-time and on-site in Rolling Meadows, Illinois, supporting EOIR and electronic warfare programs.

Designs and tests custom algorithms and develops, validates, and documents complex models and simulations for EOIR and RF electronic warfare systems. Applies systems engineering, physics, and mathematics to create performance models and integrate algorithms into products. Collaborates with engineers and physicists, supports technical presentations, requirements development, and system integration testing. The role is full-time and on-site in Rolling Meadows, Illinois, with Secret clearance required before starting.

Designs and tests custom algorithms, develops and validates complex models and simulations, and applies systems engineering to physics phenomenology, performance modeling, and targeting, EOIR, and RF systems. Collaborates with engineers and physicists to implement algorithms in products. Requires technical presentations, documentation, and proficiency in MATLAB, Python, and/or C/C++. The role is full-time, on-site in Rolling Meadows, Illinois, with 10% travel and a Secret clearance required for start.

Designs and maintains enterprise data integrations, metadata pipelines, APIs, workflows, data models, catalogs, and governance solutions. Resolves data quality and interoperability issues, documents technical processes, and collaborates with developers, data stewards, analysts, and governance stakeholders. Independently manages technical workstreams from requirements through implementation, testing, troubleshooting, and documentation. The role requires SQL, relational database, data modeling, cloud platform, API, and structured data experience, plus eligibility for a Secret clearance and DoD CAC.

Administer Braven’s Jira Service Management, Slack, Zoom, and related collaboration platforms. Design workflow automations using Jira rules, Okta Workflows, scripting, and other tools to improve internal processes. Provide tier 2/3 support, maintain technical documentation, collaborate on infrastructure decisions, manage integrations, coordinate with vendors, and evaluate new technologies. The role is hybrid in Chicago, Newark, or New York City, with occasional onsite support and travel two to four times annually.

Design, maintain, and scale secure AI and automation solutions for enterprise productivity. Build API- and connector-based workflows, configure centralized platforms, document standards, train users, and partner with technical and business stakeholders to reduce manual work and improve operational efficiency.

Design, evolve, and optimize Scala-based, low-latency trading services. Lead architecture for scalability and performance, tune JVM/Akka systems, enhance observability, ensure security and regulatory compliance, and mentor junior engineers while collaborating cross-functionally to support 24x7 high-volume trading.

As a Software Engineer, you'll design high-performance applications, collaborate on trading software development, optimize systems, and troubleshoot issues in production environments.

Investigate and resolve complex Tier 3 customer and production issues across Windows endpoints, cloud services, APIs, networking, and application data. Reproduce issues, analyze logs and source code, identify root causes, validate fixes, and coordinate with Engineering, QA, Product, Support, and Customer Success. Build troubleshooting automation, improve monitoring and observability, and document technical findings and known issues.

Designs and maintains automation scripts for network provisioning, application deployment, CI/CD integration, regression testing, and server monitoring. Deploys applications to WebLogic and JBoss, supports development-to-production transitions, and builds proactive alerting for server and application health using Python, Bash, and shell scripting.

Designs, implements, administers, and supports IBM i environments on IBM Power systems. Responsibilities include partition management, OS upgrades, PTFs, backups and restores, high availability replication, networking, security, capacity planning, hardware maintenance, and tier-three customer support. The engineer also provides technical guidance, documentation, training, vendor coordination, and 24/7 on-call support.

Designs and maintains system architectures across applications, infrastructure, and platforms. Provides technical leadership, translates requirements into scalable and secure solutions, optimizes reliability and performance, supports system integration, and collaborates with development, DevOps, security, and business stakeholders. Maintains technical documentation and participates in Agile delivery and continuous improvement. Preferred experience includes federal contracts, migrations, Ansible, Linux, Red Hat, cloud platforms, DevOps, CI/CD, and secure system design.

Provide technical support and hands-on delivery for integrating ICAM requirements into DLA enterprise systems and applications. Conduct infrastructure research and development, ensure hardware and software compliance, document technical specifications, project plans, configurations, test plans, and results, and communicate complex designs and project status to varied audiences.

The Systems Engineer will administer and maintain Linux hosting environments, troubleshoot issues, and assist development teams while ensuring performance and security standards are met.

The Systems Engineer will manage and improve the compute infrastructure for research and trading at Aquatic, focusing on HPC, storage systems, developer experience, and providing mentorship.

The Trading Systems Engineer ensures optimal performance and stability of trading platforms, monitors incidents, and implements automation tools for trading processes.

The role involves designing and building AI-native systems for revenue teams at Upside, including developing applications, partnering with teams, managing the entire stack, and improving system reliability and performance.