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Old Mission

Senior Front End Software Engineer

Sorry, this job was removed at 04:25 p.m. (CST) on Thursday, Feb 19, 2026
In-Office
Chicago, IL, USA
In-Office
Chicago, IL, USA

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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

As a Senior Front End Engineer at Old Mission, you will help solve large scale, complex technical challenges and will build cutting edge, performant, and scalable frontend systems to help make a best-in-class trading experience for our end users. You'll work with traders, quantitative researchers, and other developers to build new systems and help improve existing ones, as well as work with our risk and security teams to ensure what you build is safe and trustworthy - all while not compromising on user experience. 
Responsibilities

  • Articulate and contribute towards a long term technical direction for maintaining and scaling our frontend systems
  • Build out performant & intuitive trading interfaces using modern web tools like Typescript, React, Redux, Jest, and Webpack
  • Mentor and train other developers on coding standards and design philosophy
  • Design internal tools to increase efficiency of data mining, risk management, and more

Required Skills

  • At least 5+ years of experience developing and shipping web applications using modern, component-based JavaScript frameworks like React
  • Industry experience within a global trading firm or hedge fund 
  • A desire to work closely with users, gather feedback, and understand their problems
  • Experience shipping products from start to finish
  • Great communication skills along with a team player mentality
  • Keep up with modern front end best practices including trends in performance, usability, and security
  • Write high quality, well tested code

Nice to haves

  • Experience with automated testing and building
  • Experience with Websockets & Protocol Buffers
  • Experience with Linux, Postgres
  • Experience building multi-window frontend applications, web workers, OpenGL, Canvas API

Benefits and Perks

  • 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 

$125,000 - $225,000 - 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.

Old Mission Chicago, Illinois, USA Office

1 N Dearborn St, 8th Floor, , Chicago, Illinois , United States, 60602

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