Software Engineer jobs in Illinois

US Army Civilian Human Resources Agency

Rock Island, IL · $106,437 – $140,580

A senior developer role managing and building ServiceNow applications for a military human resources agency, supporting both platform administration and custom development. Suited for experienced ServiceNow professionals who can handle complex configurations, troubleshooting, and direct interaction with end users across a DoD environment.

Via USAJOBS · Apply there ↗

CNA Financial

Chicago, IL · $72,000 – $141,000

This role leads AI engineering transformation across enterprise platforms, mentoring teams to adopt AI-assisted development practices while architecting scalable, cloud-native solutions. It suits experienced engineers who want to combine hands-on technical work with leadership responsibility and influence engineering culture at scale.

Listed on CNA Financial’s careers site · Apply there ↗

Country Financial

Full-time · Bloomington, IL · $113,200 – $155,650

This role develops and maintains enterprise API and integration solutions primarily using MuleSoft and Azure API Management platforms. It's for experienced integration engineers who want to work across the full development lifecycle in a large financial services company.

Listed on Country Financial’s careers site · Apply there ↗

Comcast

Chicago, IL · $109,759 – $164,639

This role builds and maintains high-performance identity and audience-targeting microservices in Go within AWS, serving FreeWheel's advertising platform. It suits backend engineers with cloud-native experience who want to work on low-latency systems that power real-time ad decisions at scale.

Listed on Comcast’s careers site · Apply there ↗

Geneva

Chicago, IL · $120,000 – $180,000

This role develops internal trading platforms and dashboards that visualization and manage trades, risk limits, and algorithmic logic for Geneva Trading's global operations. It suits experienced desktop application developers comfortable with high-performance, real-time systems and collaboration with trading teams.

Listed on Geneva’s careers site · Apply there ↗

US Army Civilian Human Resources Agency

Rock Island, IL · $89,508 – $133,142

This role involves developing and maintaining web-based applications for a federal defense agency, with responsibility for the full lifecycle from design through deployment and user training. The position suits someone with several years of software development experience who can work independently on complex system problems and serve as a technical authority for stakeholders.

Via USAJOBS · Apply there ↗

Comcast

Full-time · Chicago, IL · $109,759 – $164,639

FreeWheel is seeking a C++ engineer to build and optimize the ad-serving backbone of their Buyercloud platform, which processes billions of auctions daily. The role suits someone with systems experience who enjoys working on high-scale distributed infrastructure and can handle on-call responsibilities.

Listed on Comcast’s careers site · Apply there ↗

Comcast

Chicago, IL · $152,829 – $229,243

A senior C++ engineer role building real-time ad-serving systems that handle millions of concurrent requests across distributed cloud infrastructure. This suits experienced backend engineers comfortable with high-throughput systems, low-latency optimization, and operating at scale in the advertising technology space.

Listed on Comcast’s careers site · Apply there ↗