Mid-level Software Engineer Jobs in Illinois

10 open Mid-level Software Engineer jobs in Illinois at 7 companies, including Proofpoint, JP Morgan Chase and Flywire. Updated daily from company career pages.

Proofpoint

Proofpoint provides cloud-based email security, e-discovery, and compliance solutions for companies to protect sensitive business data.

JP Morgan Chase

JP Morgan Chase is a global financial services provider that offers investment banking, asset management, treasury, and other services.

Flywire

Flywire is a global payments enablement and software company that simplifies complex payments for its clients and their customers.

Invenergy

Invenergy is a privately-held developer, operator, and investor in clean energy solutions and services.

Clearwater Analytics

Clearwater Analytics offers a solution that automates the investment lifecycle, offering portfolio planning, performance reporting and more.

Jornaya

Jornaya is a consumer journey insight platform.

Akuna Capital

Akuna Capital is a proprietary trading firm specializing in derivatives market-making.

Updated 2026-10-10.