Software Developer Jobs in Illinois, United States

The Options Clearing Corporation (OCC) seeks a Senior Associate, Software Engineering: Software Development Test (SDET) to support the design, development, and maintenance of automation frameworks and test coverage for enterprise and SaaS systems. Day-to-day work includes building and deploying automation tools with Python and Shell scripting, performing unit testing and defect diagnosis across SAP and Clarity PPM, designing test strategies for platforms like HP NGQ, and debugging ETL pipelines

OCC's Enterprise Quality Engineering organization seeks an Associate Principal in Performance Testing to design and execute comprehensive performance and failover testing strategies across mission-critical clearing, risk, and settlement systems. This role combines hands-on performance engineering expertise to ensure systems meet regulatory RTO/RPO requirements while handling multi-region failover scenarios and cloud-native architectures.

Software Developer to design, build, and maintain applications with the IT team at Crossway. Responsibilities include coding, testing, debugging, and supporting users in UNIX/Linux environments.

Campus Software Engineering team at DRW builds proprietary trading software across the full technology stack, from low‑latency strategies to large‑scale data platforms. As a Software Developer you will design, develop, test and deploy C++, Java or Python applications, optimize performance, and collaborate with quantitative researchers and traders.

Experience more with a career at COUNTRY! COUNTRY Financial is seeking a talented and driven Software Developer with specialized expertise in MuleSoft to join our dynamic technology team.

Software Development Intern at Clearwater Analytics in Chicago (Office) collaborates with colleagues and mentors to strategize, design, create, evaluate, and launch new software applications or improvements to existing systems. Day-to-day work includes learning development tools and programming concepts with mentor guidance, independently completing simple coding tasks, engaging in design discussions, documenting and testing features, and participating in code reviews.

RevStar, an AI-first innovation shop and AWS Advanced Tier Partner, seeks a Software Development Lead to act as a player-coach and technical standard bearer across its practice. Based remotely in the US (Eastern or Central Time Zone preferred), you will raise the quality bar across delivery teams through hands-on code contribution, architectural governance, developer enablement, and reusable technical accelerators.

Transportation Geospatial Information System (TGIS) team builds and maintains the geospatial data platform for transportation operations at Scott AFB. The Intermediate Software Developer writes clean .NET, C# and C++ code, creates unit tests, modernizes legacy applications, and troubleshoots production issues in a fast‑paced, highly technical environment. Hybrid work model with onsite presence at Scott AFB, IL.

MACC, a division of Harris, is seeking a Software Developer to design, develop, and maintain high-quality software solutions for its billing system used by telecommunication companies across the United States. Day-to-day work includes building database solutions in MSSQL, developing RESTful APIs, writing C#/.NET Core code, and maintaining Angular front-end applications while partnering with cross-functional teams.

Software Development Team at DRW builds advanced trading and risk applications using cutting‑edge technology. As a Software Developer Intern you will design, develop, test, and deploy proprietary software solutions, collaborating with engineers, quantitative traders, and researchers on cross‑functional projects.

WorldQuant seeks a Software Development Manager to lead a high‑performing team focused on electronic execution. The role requires managing and growing a lean group of developers, driving cross‑team collaboration, and implementing best‑in‑class engineering practices.

Software Development Intern at Clearwater Analytics in Chicago, working on-site to collaborate with colleagues and mentors on strategizing, designing, creating, evaluating, and launching new software applications or improvements to existing systems. Day-to-day work includes learning development tools and programming concepts with mentor guidance, independently completing simple coding tasks, engaging in design discussions, documenting and testing features, and participating in code reviews.

Software Development Intern at Clearwater Analytics in Chicago (on-site). The intern collaborates with colleagues and mentors to strategize, design, create, evaluate, and launch new software applications or improvements to existing systems.

Karmak Inc. powers the commercial transportation industry with smart tech, serving truck dealerships and service shops. As a Senior Software Developer in Carlinville, IL, you will develop high-quality software in a collaborative, Agile team environment, mentor junior team members, and provide expert guidance.

Clarity Partners is hiring a Software Development Intern to design, develop, test, and deploy web applications for long-term clients such as the Chicago Police Department and Cook County Clerk. Working alongside senior application developers in downtown Chicago, you will gain hands-on experience across the full software development lifecycle using technologies including C#/.NET, React/Redux, Svelte, Oracle, Microsoft SQL Server, AWS, and AWS Bedrock.

Clearwater Analytics platform team builds the world’s most trusted investment reporting and analytics technology. Senior Software Development Engineer designs, implements, tests, and deploys scalable backend services and critical processes, mentors junior developers, and leads architectural decisions.

I2X Technologies' Data Engineer Software Developer role supports federal customers at Scott AFB, IL, designing, building, and maintaining scalable data pipelines and platforms for analytics and reporting. The role implements solutions using Confluent Kafka, Elastic Stack, AWS, and Red Hat OpenShift, collaborates with analysts and engineers, and ensures data security and compliance with DoD standards.

CF Industries’ Software Engineering team builds mission‑critical applications that support global fertilizer production and logistics. The Sr. Software Application Developer designs, codes, and tests scalable solutions, mentors junior developers, and collaborates with business analysts to translate requirements into robust software.