Old Mission Capital

Senior Software Engineer - Post Trade

Old Mission Capital · Chicago, IL
Chicago, IL $200K–$250K Posted 2026-08-26
Salary
$200K–$250K
Type
Full-time
Experience
5+ yr

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.

PythonPostgreSQLC++
$110K — 10th pctl $270K — 90th pctl
This role’s midpoint $225K vs. market median $180K for Engineering roles
+25%
above median
Based on 10,000+ Engineering roles with disclosed salary ranges tracked on NewJob.
S
ETF Sales Trader
London, UK
Sales
D
Quantitative Trader - 2027 Micro-Internship Program
Chicago, IL
Data & ML
O
Fundamental Research Analyst
Chicago, IL
Operations
$170K–$200K
See all 10+ roles at Old Mission Capital →
F
Senior Software Engineer - Site Reliability
Funded.club Toronto, Canada
Engineering
$180K–$220K
A
Staff Software Engineer - Files Platform
Addepar Remote (US) Remote
Engineering
$158K–$248K
E
Sr. C++ Software Development Engineer - 3D Data and Editing
Environmental Systems Research Institute Redlands, CA
Engineering
$123K–$202K
A
Senior Software Engineer - Integrated Test
Archer Aviation San Jose, CA
Engineering
$140K–$180K
See all Engineering roles →

Interested in this role?

Apply directly on the company site — no recruiter middleman, no account required.

Apply now →
Apply on company site