---
title: 'Software Engineer – 2027 Internship Program (June Start) at Old Mission'
canonical: 'https://feeny.ai/job/software-engineer-2027-internship-program-june-start-old-mission-chicago-il-t5cb8qz30ykx'
type: 'job'
last_seen: '2026-09-11'
---

# Software Engineer – 2027 Internship Program (June Start) at Old Mission

- **Company:** Old Mission
- **Location:** Chicago IL, United States
- **Posted:** 2026-07-15
- **Last confirmed live:** 2026-09-11
- **Apply:** https://www.oldmissioncapital.com/careers/?gh_jid=7796180003

## Job description

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

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 get to 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

Required Skills

- 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

## 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

## Company Overview
- **One-liner**: Old Mission is a global, multi-asset market maker that uses proprietary technology to value securities and derivatives and provide liquidity to exchanges and institutional investors.
- **Entity Type**: Private (no external funding rounds disclosed; self-funded through operations)
- **Headquarters**: Chicago, Illinois, United States
- **Founded**: 2008
- **Founders**: Not publicly disclosed

## Core Business
- **Primary industry**: Financial Services – Quantitative Market Making
- **Target customers**: B2B – Exchanges, brokers, institutional investors
- **Mission**: “Make the financial markets more efficient by leveraging proprietary technology, sophisticated quantitative techniques, and unique ability to manage diverse portfolio of risks.” [oldmissioncapital.com](https://www.oldmissioncapital.com/)

## Products & Services
- **Market-Making Platform**: Proprietary system that dynamically values individual securities and complex derivatives, enabling rapid risk transfer across equities, options, FX, fixed income, and ETFs. [oldmissioncapital.com](https://www.oldmissioncapital.com/)
- **Risk Management Services**: Offers competitive pricing and liquidity on- and off-exchange, supported by a unique risk management approach that adapts quickly to changing market dynamics. [oldmissioncapital.com](https://www.oldmissioncapital.com/)

## Market Standing
- **Valuation / Market Cap**: Not disclosed (private company)
- **Key Metric**: Total employees – 206 (as of mid-2026), with 8.0% year-over-year headcount growth. [linkedin.com](https://www.linkedin.com/company/old-mission)
- **Notable Investors / Partners**: Privately held; no external investors listed. Works with the world’s largest exchanges, brokers, and institutional investors.
- **Growth Signals**: 30 active job postings (monthly +7.1%, quarterly +57.9%); operates in 6 countries (US, UK, Saudi Arabia, Netherlands, Ireland, Canada); paid a $13.1M distribution to parent in January 2026, indicating strong profitability. [sec.gov](https://www.sec.gov/Archives/edgar/data/1431146/000143114626000003/OMC_PUB25E.pdf)

## Competitive Advantages
- **Proprietary Technology**: Decade‑plus investment in a system that can dynamically value individual securities and intricate derivatives at market speed.
- **Tighter Pricing**: Often provides prices “much tighter than our competition” for a wide range of financial instruments. [oldmissioncapital.com](https://www.oldmissioncapital.com/)
- **Flat Hierarchy & Agility**: As a privately held firm with a flat structure, resources can be shifted rapidly; founders still sit on the trading floor, enabling quick decision-making.
- **Multi‑Asset, Global Reach**: Covers thousands of financial instruments globally, with offices in major financial hubs.

## Strategic Focus
- **Expanding Global Presence**: Adding offices in new regions (e.g., Saudi Arabia, Netherlands) and deepening relationships with exchanges and institutional clients.
- **Technology Investment**: Continual refinement of market-making models and risk management systems to maintain competitive speed and pricing.
- **Talent Development**: World‑class educational program and “learning while doing” philosophy to build the next generation of quantitative traders and engineers. [oldmissioncapital.com](https://www.oldmissioncapital.com/working-at-old-mission/)

## Why Work Here
- **Culture & Values**: “Outwardly competitive culture with a flat hierarchy that respects good ideas, wherever they come from.” Transparency and collaboration are core. [oldmissioncapital.com](https://www.oldmissioncapital.com/)
- **Immediate Responsibility**: Traders, engineers, and operations staff are given ownership of critical processes from day one; new hires work at scale and measure impact in real time.
- **Work Environment**: Modern offices with well-stocked kitchens and plenty of social opportunities; founders and senior leaders remain accessible on the trading floor.
- **Learning & Growth**: Formal education program combined with hands‑on mentorship. Engineers get exposure to the entire technology stack (Python, C++, Kubernetes, etc.) and traders learn from desk heads directly.
- **Compensation & Reviews**: Employer rating of 4.2/5.0 (42 reviews) with high marks for culture (4.6), compensation (4.4), and career development (4.6). [linkedin.com](https://www.linkedin.com/company/old-mission)
- **Work Policy**: Likely office‑focused given trading floor environment; roles are based in Chicago, New York, and London.

## Sources
1. [oldmissioncapital.com](https://www.oldmissioncapital.com/)
2. [linkedin.com](https://www.linkedin.com/company/old-mission)
3. [sec.gov](https://www.sec.gov/Archives/edgar/data/1431146/000143114626000003/OMC_PUB25E.pdf)
4. [oldmissioncapital.com – Working at Old Mission](https://www.oldmissioncapital.com/working-at-old-mission/)

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- [Technical Sourcer/Jr. Recruiter](https://feeny.ai/job/technical-sourcer-jr-recruiter-old-mission-chicago-il-g6pwc0xyb538) — Chicago IL, United States
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