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

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

Benefits offered by this job

Fully paid Medical, Dental, Vision, to

On-site meals, free breakfast and? at

Tuition Reimbursement

401(k) with employer match

Paid Vacation, Sick, and ParentalLeave

Commuter and Flexible Spending

In office M-F with 10 remote days per

Job summary

Old Mission, a global proprietary trading firm, is seeking a Senior Software Engineer in Chicago. You will help build reliable, low-latency post-trade systems and coordinate solutions across inputs, outputs, and latency requirements.

You will apply Python and C++ expertise to a distributed infrastructure that supports global trading, collaborating with teams in Chicago, New York, and London to drive performance and continuous improvement.

Qualifications

• Bachelor's degree in Computer Science, Mathematics, or a related Engineering/Science discipline.
• 5+ years of professional Python and C++ experience in production.
• 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; collaborative team player; strong problem-solving.

Responsibilities

• Build reliable systems at scale in a distributed post-trade environment.
• Coordinate solutions across inputs, outputs, and latency requirements.
• Collaborate with teams across offices to support global trading.
• Apply Python and C++ expertise to post-trade infrastructure.

Skills

Python & C++

Linux

Communication

Team leadership

Problem solving

Fast-paced environment

Education

Bachelor's degree in Computer Science, Mathematics, or related Engineering/Science discipline

Tools

PostgreSQL

MySQL

FIX protocol

Job description

Old Mission, a global proprietary trading firm, is seeking a Senior Software Engineer in Chicago. You will help build reliable, low-latency post-trade systems and coordinate solutions across inputs, outputs, and latency requirements.

You will apply Python and C++ expertise to a distributed infrastructure that supports global trading, collaborating with teams in Chicago, New York, and London to drive performance and continuous improvement.