Senior Software Engineer – Post-Trade Systems (Python/C++)

Old Mission; Chicago (IL); On-site; USD 200,000 - 250,000; Full time

Benefits offered by this job

Medical Insurance

Dental Insurance

Vision Insurance

Disability Insurance

Life Insurance

On-site meals

Tuition Reimbursement

401(k) with employer match

Paid vacation

Commuter benefits

Remote days (10 per year)

Job summary

Old Mission is seeking a Senior Software Engineer to build reliable systems at scale for post-trade operations. You will coordinate across inputs, outputs, and latency requirements, bringing proven Python and C++ expertise to a distributed system supporting global trading from Chicago.

You will work with Linux, relational databases, and FIX, contributing to a fast-paced, collaborative team with strong problem-solving skills. Competitive salary and comprehensive benefits offered.

Qualifications

• Bachelor's degree in Computer Science, Mathematics, or related Engineering/Science discipline.
• 5+ years of professional Python and C++ experience in a production setting.
• Strong Linux knowledge including performance tuning and networking.
• Experience with relational databases (PostgreSQL, MySQL, etc.).
• Experience with FIX (execution management, market data, drop copy).
• Excellent written and verbal communication skills.
• A collaborative team player who owns and drives projects.

Skills

Python

C++

Linux

Relational databases

FIX experience

Strong communication

Team collaboration

Education

Bachelor's degree in Computer Science/Math/Engineering

Tools

PostgreSQL

MySQL

FIX

Job description

Old Mission is seeking a Senior Software Engineer to build reliable systems at scale for post-trade operations. You will coordinate across inputs, outputs, and latency requirements, bringing proven Python and C++ expertise to a distributed system supporting global trading from Chicago.

You will work with Linux, relational databases, and FIX, contributing to a fast-paced, collaborative team with strong problem-solving skills. Competitive salary and comprehensive benefits offered.