JuniorFull-StackEngineer

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 Junior Full-Stack Engineer at Old Mission, you will work alongside experienced engineers to help build performant and scalable frontend systems that power a best-in-class trading experience for our end users. You'll collaborate with traders, quantitative researchers, and senior developers to contribute to new systems and improve existing ones, while learning our standards for safety, reliability, and user experience. This role is for 2026 college graduates to begin in August. Responsibilities Contribute to the development of intuitive trading interfaces using modern web tools like TypeScript, React, Redux, Jest and Webpack Write clean, well-tested code under the guidance of senior engineers Participate in code reviews to learn and uphold coding standards and design philosophy Assist in building internal tools to increase efficiency of data mining, risk management, and more Collaborate closely with teammates to understand user needs and translate them into effective UI solutions Required Skills An undergraduate or an advanced degree in a quantitative field such as Computer Science, Engineering, or one of the hard sciences Passion for UX and front-end development Internship experience in a front-end focused role coding in TypeScript, JavaScript, or React Minimum 3.0 GPA Understanding of systems programming, data structures, and algorithms Familiarity working in a Linux environment Strong analytical and probl