---
title: 'C++ Software Engineer - Research Infrastructure at Old Mission'
canonical: 'https://feeny.ai/job/c-software-engineer-research-infrastructure-old-mission-chicago-mmxqrc98pq91'
type: 'job'
last_seen: '2026-10-16'
---

# C++ Software Engineer - Research Infrastructure at Old Mission

- **Company:** Old Mission
- **Location:** Chicago, IL
- **Posted:** 2024-09-03
- **Last confirmed live:** 2026-10-16
- **Apply:** https://www.oldmissioncapital.com/careers/?gh_jid=6107903003

## 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

Old Mission is seeking a highly skilled Software Engineer to join our Research Infrastructure team. The team is responsible for managing and maintaining datasets, infrastructure, and libraries that power the firm's research activities across a huge number of instruments in nearly all asset classes - a vast data universe of Equities, Options, Commodities, Bonds, and more. Our day to day consists of handling production issues, developing new datasets, building next-generation infrastructure, and maintaining our data pipelines. This person will sit in our Chicago office.

Responsibilities:

- The complexity of data sources presents unique engineering challenges that require innovative solutions that you will help create
- You will be responsible for designing, building, and maintaining data pipelines and data infrastructure
- You will help capture, archive, store, and index data for the entire firm
- You will design and implement big data tooling to support cluster computing and high-throughput computing tasks
- You will work on solving problems relating to how data is transmitted between C++ and Python
- Re-architect current APIs to ensure scalability and performance improvements
- Collaborate in the release process, including rolling out new releases, debugging and maintenance of systems
- Identify and implement strategies for upgrading the current data storage capacity
- Use a combination of technical expertise and analytical skills to ensure the efficient and effective functioning of our data infrastructure
- Focus on solving tough problems using research and data and spend time solving these problems utilizing modern technologies

Required Skills

- Experience with C++ (required) and Python (preferred)
- 4+ years of experience as a Systems Engineer, Platform Engineer, Data Engineer, Software Engineer, or similar - "Big Data" experience preferred
- Ability to drive and lead technical projects as well as mentor junior engineers
- Knowledge of software engineering practices - what makes code reusable and extensible
- Passion for infrastructure: building internal tooling and frameworks
- Experience with the design and implement big data tooling to support cluster computing and high-throughput computing tasks is a plus
- Experience with Linux APIs – filesystems, networking, processes management, etc.
- Experience developing big data technology, preferably complete rebuilds is a plus
- Bachelor's degree in Computer Science or a related field

## Benefits and Perks

- Competitive salary with discretionary annual bonus
- 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

Base Salary Range

$175,000 - $300,000 - 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

## 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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