Python Software Engineer — Trading Systems Innovator
old missionChicago (IL)
Python Software Engineer — Trading Systems Innovator
Posted 2 days ago
old missionChicago (IL)
SENIORITY
Senior
About the role
Old Mission, a global proprietary trading firm with offices in Chicago, New York, and London, seeks a Software Engineer specializing in Python. You will own and advance cutting‑edge trading systems and mission‑critical applications, working closely with quants, traders, and research teams to improve adaptability and scalability.
You will leverage a strong Python background on Linux, collaborate across disciplines, and contribute to innovative trading applications in a fast‑paced environment.
Before you apply
Applying takes about a minute. These four things decide how fast it moves after that.
Your profile is current
It's what we read first. Occupations, seniority and locations matter more than a long history.
Two examples you can talk through
Not a portfolio — just two pieces of work where you can explain the decisions and what you'd change.
A number in mind
What you're on now and what would make you move. We negotiate better when we know both.
Your notice period
Employers plan around it, and it's the question that stalls offers most often.
Once you apply, someone reads it and calls you before anything reaches the employer — usually within two working days.