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Senior Python Software Engineer

Old Mission Capital, New York, NY

Posted pay

$200K–$250K

a year

Location: New York, NY
Work type: Onsite
Level: Senior
Experience: 5+ years
Skills in the job text: Python
Kafka
Linux
Posted: May 5, 2026
Last check: 1 h ago
Job type: Software engineering

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Old Mission Capital

About Old Mission Capital: funding, hiring and pay

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The role

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.

What you need

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

Pay and benefits

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.

About Old Mission Capital

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.

Read the job posting on the Old Mission Capital site

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Source: the Old Mission Capital Ashby job board. We last checked this job 1 h ago. We first saw it 1 h ago. A job on a job board does not always mean that the team interviews people now. We found this job board in a public list. We did not yet compare it with the careers page of the company.

Compared with similar jobs

This base pay is above the median for senior software engineering jobs in New York.

Median: $205K a year
Other jobs in the group: 656

We compare the middle of each posted range. This is base pay as posted. The group does not include this job.

Old Mission Capital

Open tech jobs: 24
With posted pay: 79%
Median posted base: $170K–$250K

About Old Mission Capital: funding, hiring and pay