Real job — pulled straight from Old Mission Capital LLC’s careers page · Verified September 9, 2026 · No reposts.
Job description
Old Mission Capital LLC is hiring a Senior Software Engineer, Post Trade — a full-time, based in Chicago, IL role ($200k–$250k). Apply directly on Old Mission Capital LLC's careers page below.
Senior Software Engineer - Post Trade
Location: Chicago, IL, United States
Department: Technology
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.
About the Position
We are actively hiring a Senior Software Engineer with a passion for building reliable systems at scale. As a post-trade developer, you will coordinate solutions across a wide range of inputs, outputs, and latency requirements. You will bring proven expertise in Python and C++ to a distributed system that supports global trading across the entire firm.
Required Skills
- Bachelor's degree in Computer Science, Mathematics, or a related Engineering/Science discipline
- A minimum of 5 years of professional Python and C++ experience in a production setting
- Strong Linux knowledge (e.g. performance tuning, networking)
- Comfortable working with relational databases (e.g. PostgreSQL,MySQL, etc.)
- FIX experience (e.g. execution management, market data, drop copy)
- Exceptional written and verbal communication skills
- A collaborative team player with a knack for owning and driving exciting projects
- Thrives in a fast-paced work environment, showcasing effective problem-solving abilities
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
$200,000 - $250,000 - 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.
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Frequently asked questions
What is the salary for Senior Software Engineer, Post Trade at Old Mission Capital LLC?
The estimated salary range for Senior Software Engineer, Post Trade at Old Mission Capital LLC is $200,000 - $250,000 USD per year.
What skills are required for Senior Software Engineer, Post Trade at Old Mission Capital LLC?
The required skills for Senior Software Engineer, Post Trade at Old Mission Capital LLC include: Python, C++, Linux, PostgreSQL, MySQL.
What is the seniority level for Senior Software Engineer, Post Trade at Old Mission Capital LLC?
Senior Software Engineer, Post Trade at Old Mission Capital LLC is a Senior level position.
How do I apply for Senior Software Engineer, Post Trade at Old Mission Capital LLC?
You can view the full description and apply for Senior Software Engineer, Post Trade at Old Mission Capital LLC on EchoJobs: https://echojobs.io/job/old-mission-capital-llc-senior-software-engineer-post-trade-57rkx.