C Software Engineer Jobs in Illinois
C Software Engineer jobs in Illinois are open across Chicago, Byron, and Clinton and other Illinois metros, with employers like S&C Electric Company, Constellation, and Chicago Trading Company hiring at every experience level. Find a role that fits below and apply directly.
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INTRODUCTION
Old Mission is a global proprietary trading firm that leverages state-of-the-art technology and research to identify and execute profitable trading strategies across multiple asset classes around the world. Our offices in Chicago, New York, and London are all composed of naturally-curious individuals who thrive in a team environment and constantly strive for improvement. Old Mission does not seek capital from outside investors, allowing us the flexibility to aggressively invest in our team members and keep them engaged in the firm’s growth.
ABOUT THE POSITION
Old Mission Capital LLC is looking to add several C++ Software Engineers to join our team in Chicago. In this role, you will be building and optimizing our current automated trading infrastructure, and you will also be tasked with working directly with our Traders and Quants to develop the next generation of the firm’s trading algorithms and strategies. Additionally, you will be responsible for creating and developing scalable multi-tiered applications. Our Software Engineers work on small collaborative teams and are a key component for our success.
REQUIRED SKILLS
- BS/BA degree in Computer Science, Engineering, or another technical related field
- 5+ years of experience developing applications in C++ (with at least 3 years of C++ 11), preferably with high availability systems with very tight latency constraints
- Experience with C++ 11/14/17/20, Linux, and Python and BASH scripting
- In-depth knowledge of the Linux kernel, systems programming
- A passion for solving challenging problems
- Strong systems knowledge and prefer some experience in developing low latency systems
- Experience with writing applications connecting to exchange APIs or using network protocols
- Experience with parallel, concurrent, and multi-threaded programming
- Prefer experience with low-latency computing and hardware-level design
- Experience with Git, SVN, Mercurial
BENEFITS AND PERKS
- Fully paid Medical, Dental, Vision, Disability, and Life Insurance
- Fully stocked kitchen; free breakfast and lunch every day on-site
- Tuition Reimbursement Program
- 401(k) with employer match
- Paid Vacation, Sick, and Parental leaves
- Commuter and Flexible Spending Programs
- In office M-F with 10 remote days per year
BASE SALARY RANGE
$175,000 - $300,000 - Salaries are based on numerous factors such as skills, experience, and education. Our compensation package also includes a discretionary bonus and a comprehensive benefits program for full-time employees. For more information, reach out to your recruiter.
Old Mission is not accepting unsolicited resumes from any staffing/search firms. All resumes submitted by staffing/search firms to any employee at Old Mission via email, the Internet or directly without a valid signed search agreement will be deemed the sole property of Old Mission, and no fee will be paid in the event the candidate is hired by Old Mission.
LOCATION
Chicago
See All 33 C Software Engineer Jobs in Illinois
Find roles in Illinois that match your experience and apply in just a few clicks.
Find C Software Engineer JobsC Software Engineer Jobs by City in Illinois
Where Illinois roles are concentrated, by current openings.
C Software Engineer Job Market in Illinois
A snapshot from current Illinois openings, updated as new roles post.
Who's Hiring
- S&C Electric Company16

- Constellation8

- Chicago Trading Company1

- Cintal1

- Codal1

Top Industries Hiring
- Energy24
- Consulting & Professional Services2
- Investment & Asset Management2
- Technology & Software2
- Electronics & Hardware1
What Illinois Employers Look For
The qualifications that appear most often in C software engineer jobs across Illinois.
- Proficiency in C with demonstrated experience in systems or embedded development
- Familiarity with memory management, pointers, and low-level debugging techniques
- Experience with real-time operating systems such as FreeRTOS, VxWorks, or QNX
- Knowledge of hardware interfaces including UART, SPI, I2C, and CAN protocols
- Bachelor's degree in computer science, electrical engineering, or a related field
- Experience with version control systems and build tools such as Git, Make, or CMake
C Software Engineer Jobs in Illinois: Frequently Asked Questions
How many C software engineer jobs are there in Illinois?
There are 33+ C software engineer openings in Illinois on Migrate Mate as of June 2026, with the most roles in Chicago, Byron, and Clinton. New positions post regularly as employers across Illinois hire.
How much do C software engineers make in Illinois?
C software engineers in Illinois earn a median of about $132,110 a year, based on May 2025 Bureau of Labor Statistics wage data, ranging from around $80,980 for the lowest 10% to over $194,740 for the top 10%. Pay rises with experience, specialty, and employer.
Which Illinois cities have the most C software engineer jobs?
Chicago, Byron, and Clinton have the most C software engineer openings in Illinois right now, with additional roles spread across smaller metros statewide.
Which companies hire C software engineers in Illinois?
Employers hiring C software engineers in Illinois include S&C Electric Company, Constellation, and Chicago Trading Company, based on current listings on Migrate Mate as of June 2026.
Are there remote C software engineer jobs in Illinois?
Yes. About 21% of C software engineer openings tied to Illinois are remote or hybrid as of June 2026. The rest are on-site roles based in Illinois metros.
How do I apply for C software engineer jobs in Illinois?
You can apply to C software engineer jobs in Illinois directly on Migrate Mate. Search the listings above, find roles that match your experience and preferred Illinois location, then apply to each one that fits.
See All 33 C Software Engineer Jobs in Illinois
Find roles in Illinois that match your experience and apply in just a few clicks.
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