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Software Engineer – 2027 Internship Program (June Start)

Old Mission Capital, Chicago, IL

Posted pay

$150K–$200K

a year

Location: Chicago, IL
Work type: Onsite
Level: Intern
Skills in the job text: Python
TypeScript
C++
Posted: Jul 15, 2026
Last check: 4 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

Our internship program is geared for current students who want to work alongside our talented software engineers creating impactful solutions to further the firm's market initiatives. We are a smaller firm, which means you'll get to know the people you're working with and they'll get to know you. Responsibilities include supporting the development of C++ based trading applications and tools. You will be given hands-on projects that contribute to the firm's daily activities, giving you real exposure to how our business runs, not just observation.

In this role, you'll have the opportunity to learn more about creative programming and the tools needed to support electronic trading. If you're looking to make an immediate contribution this summer and get a firsthand look at building out our business, feel free to apply today!

What you will do

Gain exposure to how trading works, from the underlying theory to the systems and tools we build around it
Regular sessions with senior engineers covering the fundamentals of the systems and tools we use
Get direct feedback from the engineers you're working alongside, learning in real time
Work directly with engineers, traders, and other teams on projects that matter to the firm day to day

What you need

Currently pursuing a bachelor's or master's in Computer Science, Computer Engineering, or a similar technical field
Minimum 3.0 GPA
A strong work ethic and ability to adapt quickly in a fast-paced environment
At least junior standing, with a graduation date of December 2027 or May 2028
Comfortable with one or more of C++, Python or TypeScript
A solid grasp of computer science fundamentals: data structures, algorithms, systems
Genuine interest in markets and how software supports them
Ability to start the internship on June 1, 2027
No finance experience is required

Pay and benefits

Benefits and Perks

Fully stocked kitchen; free breakfast and lunch every day on-site
Corporate housing at no cost to you
Access to people across the firm – traders, researchers, and engineers

Base Salary Range

$150,000 - $200,000 - Salaries are based on numerous factors such as skills, experience, and education. 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 4 h ago. We first saw it 24 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.

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Old Mission Capital

Open tech jobs: 25
With posted pay: 76%
Median posted base: $170K–$250K

About Old Mission Capital: funding, hiring and pay

Compared with similar jobs

This base pay is above the median for intern software engineering jobs in other US places.

Median: $119K a year
Other jobs in the group: 42

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