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Old Mission CapitalChicago, IL

Software Engineer – 2027 Internship Program (June Start)

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Programme

Internship

Location

Chicago, IL

About the role

Join Old Mission's 2027 summer internship as a software engineer, working on C++ trading applications and gaining hands-on experience in a collaborative environment.

About the Role

  • Support development of C++ based trading applications and tools.
  • Work on projects contributing to daily firm activities.
  • Learn creative programming and electronic trading support tools.
  • Collaborate closely with engineers, traders, and other teams.
  • Gain real exposure to trading systems and market initiatives.

Responsibilities

  • Develop and maintain trading software solutions.
  • Participate in regular sessions with senior engineers.
  • Receive direct feedback and mentorship.
  • Engage in projects impacting firm operations.
  • Understand trading theory and system fundamentals.

Requirements

  • Currently pursuing bachelor's or master's in CS or related field.
  • Minimum 3.0 GPA required.
  • Junior standing with graduation in Dec 2027 or May 2028.
  • Proficient in C++, Python, or TypeScript.
  • Strong grasp of data structures, algorithms, and systems.
  • Interest in markets and software's role in trading.

Internship Details

  • Start date: June 1, 2027.
  • Duration: Summer internship (exact length not specified).
  • No prior finance experience required.
  • Work in a small, collaborative team environment.

Benefits

  • Free breakfast and lunch daily on-site.
  • Fully stocked kitchen available.
  • Corporate housing provided at no cost.
  • Access to professionals across trading, research, and engineering.

Compensation

  • Base salary range: $150,000 - $200,000 depending on skills and experience.