C++ Software Engineer

Careers - See Current Openings - Old Mission

Apply to this job
London Until 8/23/2026 7+ years exp H-1B sponsor history First posted March 27, 2025 Last posted March 13, 2026
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.

Old Mission does not seek capital from outside investors, allowing us the flexibility to aggressively invest in our team members and keep them engaged in the firm’s growth.

About the Position

Old Mission Capital LLC, is looking to add a C++ Software Engineer to join our team in London. In this role, you will be building and optimizing our current automated trading infrastructure, and you will also be tasked with working directly with our Traders and Quants to develop the next generation of the firm’s trading algorithms and strategies. Additionally, you will be responsible for creating and developing scalable multi-tiered applications. Our Software Engineers work on small collaborative teams and are a key component for our success.

Required Skills

  • BS/BA degree in Computer Science, Engineering, or another technical related field
  • 7+ years of experience developing applications in modern C++ 
  • Experience with C++ 11/14/17/20, Linux and Python and BASH scripting
  • In-depth knowledge of the Linux kernel, systems programming
  • A passion for solving challenging problems
  • Strong systems knowledge and prefer some experience in developing low latency systems
  • Experience with writing applications connecting to exchange API’s or using network protocols
  • Experience with parallel, concurrent, and multi-threaded programming
  • Prefer experience with low-latency computing and hardware-level design
  • Experience with Git, SVN, Mercurial 
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
  • Fully stocked kitchen and free on-site lunch daily
  • Season Ticket Loan Scheme
  • Tuition Reimbursement Program
  • Cycle to Work Scheme

 

 

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 this role

Summary

Develops and optimizes trading infrastructure; works with traders and quants

Job title

C++ Software Engineer

Experience level

7+ years

Minimum experience

7+ years exp

Industry

financial trading

Location requirements

London-based, on-site work required

Salary

Not specified

Visa sponsorship

H-1B sponsor history

Management role

No

Skills & keywords

Required skills

BS/BA in computer science or related fieldC++ 11/14/17/20LinuxPythonBASH scriptingsystems programminglow latency systemsexchange API connectivityparallel programmingmulti-threaded programmingGitSVNMercurial

Preferred skills

None specified

Specializations

C++systems programminglow latencyconcurrent programmingnetwork protocols
Locations

Structured locations inferred from the posting.

London, UK

On-site City