Company profile

Old Mission Tech Stack

Multi-asset market maker pricing securities and derivatives via automated trading

Financial Services Chicago, Illinois 201–500 employees Founded 2008 Privately Held

Old Mission is a Chicago-based market maker running automated trading on a C++ and Python core, with Protocol Buffers, WebSockets and OpenGL pointing to custom low-latency and visualization tooling. Its adoption of Bazel alongside a legacy mix of Subversion, Mercurial and three CI systems suggests a build-system consolidation push. Hiring is accelerating and weighted evenly across engineering, research and trading-side finance roles.

Tech Stack 44 technologies

Core StackPython C++ JavaScript React PostgreSQL MySQL MATLAB Java Ruby Docker Kubernetes Jenkins CircleCI Intune TypeScript Redux Jest Webpack Bloomberg Subversion Mercurial VBA Travis CI Exchange Online WebSockets Protocol Buffers OpenGL Canvas API Web Workers Red Hat Enterprise Linux+10 more

AdoptingBazel

What Old Mission Is BuildingChallenges and projects from their job posts

◆Challenges

Performance and stability of low-latency trading systems
Scalability and performance improvements
Complexity of data sources
Building a formal trader development pipeline
High interview volume straining hiring process

▲Active Projects

Pricing model development and enhancement
Next-generation trading algorithms
Options research infrastructure
Automating trading infrastructure in Python
Rollout of latency-sensitive trading systems
Designing data pipelines

Hiring Activity

Accelerating30 roles · 8 in 30d

Department

Engineering

Research

Finance

Data

Education

Ops

Seniority

Senior

Mid

Junior

Lead

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About Old Mission

Old Mission is a privately held, multi-asset market maker founded in 2008 and headquartered in Chicago, Illinois. The firm prices individual securities and complex derivatives and provides liquidity and risk transfer to exchanges, brokers and institutional investors. Its focus areas span automated trading, arbitrage and in-house software development. The company employs 201–500 people and hires in the United States and the United Kingdom.

HeadquartersChicago, Illinois

Company Size201–500 employees

Founded2008

Hiring MarketsUnited States, United Kingdom

Frequently Asked Questions

What tech stack does Old Mission use?

Old Mission's stack centers on C++, Python and Java, with React, TypeScript and Redux on the front end, PostgreSQL and MySQL for data, Docker and Kubernetes for deployment, and Bloomberg for market data. It is adopting Bazel.

Is Old Mission hiring?

Yes. Hiring is accelerating, concentrated in engineering, quantitative research and trading-focused finance roles, mostly at senior and mid levels, across the United States and the United Kingdom.

What is Old Mission working on?

Job posts point to pricing model development, next-generation trading algorithms, options research infrastructure, automated trading infrastructure optimization in Python, and rollout of new trading systems.

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How this profile is built

Old Mission's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.