---
title: 'Quantitative Trader at Old Mission'
canonical: 'https://feeny.ai/job/quantitative-trader-old-mission-london-6bg4vwk5sf9j'
type: 'job'
last_seen: '2026-09-11'
---

# Quantitative Trader at Old Mission

- **Company:** Old Mission
- **Location:** London, United Kingdom
- **Posted:** 2021-05-04
- **Last confirmed live:** 2026-09-11
- **Apply:** https://www.oldmissioncapital.com/careers/?gh_jid=4455441003

## 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 Europe is a quantitative proprietary trading firm and is currently recruiting a quant trader to join our London office. Our traders work in teams to seek out and profitably trade mispriced securities. The quant trader job responsibilities will include disciplined decision making, risk management, derivative pricing, and researching new opportunities.

Required Skills

- An undergraduate or an advanced degree in a quantitative field such as computer science, engineering, or one of the hard sciences
- Proficiency with at least one of the following languages: Python, C++, Java, VBA, R, Matlab, or Ruby
- The ability to work and solve problems as part of a team, often in a high-pressure environment
- 1+ years of relevant trading experience
- Proven trustworthiness and performance under the highest ethical standards
- A strong desire for knowledge and to understand how things work
- Superior written and verbal communication skills

## Benefits and Perks

- Competitive salary with discretionary annual bonus
- Fully paid private medical, dental, vision with extended coverage and life insurance
- Robust Pension Scheme, income protection, and salary exchange
- Free on-site lunch daily
- Season Ticket Loan Scheme
- Tuition Reimbursement Program

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/)

## Other roles at Old Mission

- [Junior Trading Operations/DevOps Engineer](https://feeny.ai/job/junior-trading-operations-devops-engineer-old-mission-chicago-il-va0rv6jnef56) — Chicago IL, United States
- [Fundamental Research Analyst - 2027 Graduate Program - (August Start)](https://feeny.ai/job/fundamental-research-analyst-2027-graduate-program-august-start-old-mission-y9dc91kf89ft) — Chicago IL, United States
- [Technical Sourcer/Jr. Recruiter](https://feeny.ai/job/technical-sourcer-jr-recruiter-old-mission-chicago-il-g6pwc0xyb538) — Chicago IL, United States
- [Senior Software Engineer - Post Trade](https://feeny.ai/job/senior-software-engineer-post-trade-old-mission-chicago-il-ntjkp3acw5f4) — Chicago IL, United States
- [Associate Head of Trader Education](https://feeny.ai/job/associate-head-of-trader-education-old-mission-chicago-il-78k1pp8tynaf) — Chicago IL, United States
- [Legal Intern - Summer 2027](https://feeny.ai/job/legal-intern-summer-2027-old-mission-chicago-il-23p68m9kchd8) — Chicago IL, United States
- [Compliance Analyst Co-Op](https://feeny.ai/job/compliance-analyst-co-op-old-mission-chicago-il-0z7a8e5wqr7f) — Chicago IL, United States
- [Quantitative Researcher (Ph.D.) - 2027 Graduate Program - (August Start)](https://feeny.ai/job/quantitative-researcher-ph-d-2027-graduate-program-august-start-old-mission-g7e1q81tw5az) — Chicago IL, United States
- [Senior Compensation Manager](https://feeny.ai/job/senior-compensation-manager-old-mission-chicago-il-62sfe15prynz) — Chicago IL, United States
- [Software Engineer – 2027 Internship Program (June Start)](https://feeny.ai/job/software-engineer-2027-internship-program-june-start-old-mission-chicago-il-t5cb8qz30ykx) — Chicago IL, United States