Senior Python Software Engineer
Confirmed on the employer's own hiring board on Nov 3, 2026. First seen by Alion on May 5, 2026. Old Mission scores B on the Alion truth index.
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 Python Software Engineer with a passion for building reliable systems at scale. This role involves developing and supporting execution platforms, real-time trader-facing applications integrated with our trading systems, large-scale data and research systems, and automation of trader workflows. You will bring proven expertise in Python to distributed systems supporting global trading across the firm.
Required Skills
Bachelor's degree in Computer Science, Mathematics, or a related Engineering/Science discipline
A minimum of 5 years of professional Python experience in a production environment
High proficiency in Python on Linux Platforms
Familiarity with relational databases and/or enterprise messaging/object storage (Kafka, Ceph, Iceberg)
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.