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Under direct supervision, participate in research and innovation efforts on complex solutions to security challenges in telecommunications and IP/computer networking equipment in the cyber security domain on multiple hardware platforms utilizing Linux and/or Unix-based operating systems. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.

<span itemprop="name">CACI</span> provides information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. A member of the Fortune 1000 Largest Companies, the Russell 2000 Index, and the S&amp;P SmallCap 600 Index, CACI provides dynamic careers for over 15,800 employees working in over 120 offices worldwide. Visit <a href="http://www.caci.com" target="_blank" itemprop="url" mns_rt="Company">www.caci.com</a>.<br/>
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      We strive to sustain a corporate culture based on integrity - one that's focused on treating customers ethically and making their priorities our priorities. We pride ourselves in finding and hiring people with the highest intellectual capital, and providing them with challenging opportunities and encouraging their innovation and initiative.

CACI

Software Engineer

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The Security Sales Engineer supports the Enterprise Sales team in achieving revenue targets by delivering high-quality pre-sales technical support and presentations. The Sales Engineer serves as a product solution specialist and supports strategic initiatives across designated areas such as System Integrators, Service Providers, and Channel Partners.

US HealthCare Careers

Security Sales Engineer

Responsible for complying with the security requirements set forth by the Information Security team and the established ISO 27001 Security Roles, Responsibilities, and Authorities Document found in the ISMS Document Library. This role will be responsible for taking aspects of software engineering and applying them to cloud infrastructure and operations solutions powering myQ, an industry leading IoT cloud platform.

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Chamberlain Group

Sr. Site Reliability Engineer

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You will join a highly experienced global team that supports a wide array of critical systems, including source control, continuous integration pipelines, artifact repositories, and observability tools, all of which are vital to the stability and performance of our trading platforms and are used by software engineering, research, and trading teams across IMC. Administer and oversee source control systems, continuous integration services and build agents, artifact repositories, metrics, logging, observability tools, and related systems across multiple data centers and regions, both in on-premises environments and leveraging AWS cloud services.

Systems Engineer - Global Development Platform

The USTC Managed Information Technology Services (MITS) contract is intended to provide strategic, technical, and program management guidance and support services to facilitate the operations and modernization of the combatant command's infrastructure, systems, and applications. The successful candidate will system engineering work to maintain, configure, and reliably operate network servers, server virtualization systems, laptops, desktops, VDI, and supporting software/hardware.

SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions.

We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.

Science Applications International Corp

Systems Engineer

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Strong communication and problem-solving skills, with the ability to troubleshoot issues with platform users, collaborate across teams, prioritize competing work, and deliver in a fast-paced trading environment. As a Senior Data Engineer in our Unified Platform organization, you will design, build, and operate the data platform and managed services used by Traders, Quantitative Researchers, and Back-Office personnel.

DRW Holdings LLC

Senior Data Engineer, Unified Platform

Have worked on challenging projects that involved things like building a custom compiler, writing a matching engine, or working with large amounts of data in real time. Bonus points if you have: Experience working in the trading industry or another ultra-low latency sensitive business that involves solving remarkably complex problems.

Senior Software Engineer, Trading Platform, C++

Working knowledge of Large Language Models (LLMs), Prompt Engineering, Retrieval-Augmented Generation (RAG), AI-powered search, and AI-assisted development tools such as GitHub Copilot, Microsoft Copilot, ChatGPT, or comparable platforms. For You: Grow and recharge with tuition reimbursement, flexible time off for exempt employees or paid time off for nonexempt employees, up to 12 paid holidays per year, commuter benefits, employee discounts, charitable gift matching, and paid volunteer time off, plus corporate volunteer events that make it easy to give back.

TransUnion

Lead, Full Stack Engineer

As a member of the desk, you will be integral in the interaction between research and trading teams; you will have the opportunity to work with cutting-edge low-latency technologies and will be surrounded by senior technologists providing you with the best possible environment to succeed. We are seeking a Senior Software Engineer to develop new and improve existing low-latency trade execution systems for our Asia Equity Options business.

Senior Software Engineer, Options Execution

This is an opportunity to solve challenging problems while working closely with experienced traders, researchers and software engineers to optimize operational workflow and use the right tools and technology for the job. Embed with Cumberland Mining trading and operations stakeholders, and deliver polished, ergonomic, and elegantly engineered software solutions to business problems faced by the trading operation.

Software Engineer - Trading Operations

As a Staff Engineer focused on the Data Platform, you will bring experience scaling data platforms to shape and uphold DRW's long-term data platform vision, translating data strategy into engineering products and managed services used by Traders, Quantitative Researchers, and Back-Office personnel. Design, guide, and build managed platform services for data storage, distributed query execution, batch and streaming processing, and workload orchestration, owning their lifecycle from provisioning and upgrades through production support, refining the managed offers from direct user feedback.

Staff Engineer, Data Platform

Proficient with containerization and Kubernetes in Linux environments, including Kubernetes architecture, workloads, networking, managed services, security configuration assessment, vulnerability remediation, and automated guardrails using infrastructure-as-code and policy-as-code. We are seeking a Cloud Security Engineer to work with various business units across the firm to empower our technologists to deliver secure cloud infrastructure and cloud integrated solutions.

Cloud Security Engineer

Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. Information Security Corporation, a SAIC company is seeking an experienced C++ Software Developer to help build state-of-the-art security software.

C++ Software Engineer

SAIC is seeking a skilled and motivated Cloud Engineer to join our team in supporting an IT Service Management (ITSM) effort for the U.S. Transportation Command (USTRANSCOM) located at Scott Air Force Base (AFB), Illinois. This is a career-defining opportunity to provide strategic, technical, and hands-on cloud engineering expertise to TCJ6, USTRANSCOM''s tech-forward Command, Control, Communications & Cyber Systems Directorate.

Senior Cloud Engineer

Diagnose and rectify complex problems involving multiple teams related to OpenStack including compute, storage, and networking issues. We''re looking for a Senior Engineer for our Virtualization team who will help guide the design and implementation of a new OpenStack-based virtualization platform.

Senior Virtualization Engineer

Demonstrated curiosity and hands-on experimentation with technology—whether through personal projects, home labs, open source contributions, or deep-dive exploration of operating systems and networking. We believe production ownership and engineering improvement go hand in hand — the best way to improve a system is to deeply understand how it behaves under real-world pressure.

Trading Engineer - Execution

Our researchers, traders, and engineers work as a collective, combining rapid experimentation, advanced infrastructure, and real-time feedback to turn insight into execution and execution into advantage. IMC is a research-driven trading firm where quantitative modeling, machine learning, and engineering shape how modern markets are traded.

Verification Engineer

We bring deep experience from organizations such as DeepMind, NASA JPL, Boston Dynamics, NVIDIA, Amazon, Tesla Autopilot, Cruise, Zoox, Toyota Research Institute, and SpaceX, along with a track record of field deployments and strong performance in DARPA challenge segments. As our Robotics Autonomy Engineer – Manipulation, you’ll lead the development and deployment of whole-body control and manipulation capabilities for humanoids and arm-equipped quadrupeds, turning real field scenarios into behaviors our robots perform reliably every day.

FieldAI

Robotics Autonomy Engineer, Manipulation

Provide middleware administration duties for critical banking platforms, end-to-end, including WebSphere, jBoss, Tomcat, Apache, IBM HTTP Server, and WXS (extreme scale cache). Key responsibilities include creating infrastructure tools and their integration as a service, facilitating deployment of technical solutions by developing templates, playbooks and automation used during implementation.

Linux Engineer Jobs in Illinois

Software Engineer CACI

Security Sales Engineer US HealthCare Careers

Sr. Site Reliability Engineer Chamberlain Group

Systems Engineer - Global Development Platform IMC

Systems Engineer Science Applications International Corp

Senior Data Engineer, Unified Platform DRW Holdings LLC

Senior Software Engineer, Trading Platform, C++ DRW Holdings LLC

Lead, Full Stack Engineer TransUnion

Senior Software Engineer, Options Execution DRW Holdings LLC

Software Engineer - Trading Operations DRW Holdings LLC

Staff Engineer, Data Platform DRW Holdings LLC

Cloud Security Engineer DRW Holdings LLC

C++ Software Engineer Science Applications International Corp

Senior Cloud Engineer Science Applications International Corp

Senior Virtualization Engineer DRW Holdings LLC

Trading Engineer - Execution IMC

Verification Engineer IMC

Robotics Autonomy Engineer, Manipulation FieldAI

Infrastructure Engineer II - Middleware Administrator Bank of America

CHI - 2026 - Systems Engineer IMC

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