How much does a Software Systems Engineer III make in Illinois?
As of March 01, 2026, the average salary for a Software Systems Engineer III in Illinois is $120,125 per year, which breaks down to an hourly rate of $58.
However, a Software Systems Engineer III's salary can vary significantly. Here’s a look at the typical salary range:
- Top Earners (90th percentile): $140,939
- Majority Range (25th-75th percentile): $110,825 to $131,020
- Entry-Level (10th percentile): $102,359