Quantitative Developer

LSEG•Buffalo, NY

1d•$98,500 - $164,100•Onsite

About The Position

London Stock Exchange Group is looking for an application developer to join a team of Fixed Income Analytics Application Development. The candidate is expected to work closely with other developers, making efficient and effective use of AI-assisted development tools, to drive application development for Yield Book product suite, including Excel Add-In, Structuring Tool and API. The Yield Book is a fixed income analytics system widely used by financial institutions and this position plays a vital role in the development of our products.

Requirements

An advanced degree (master’s or higher) in a quantitative field such as Financial Engineering, Computer Science, Physics, Engineering, Mathematics, etc.
Excellent programming skills in one of the languages (C/C++, .NET, Java or Python)
1 to 3 years of financial industry experience or academic training
Hands-on experience using AI coding assistants (e.g. GitHub Copilot, Claude, Cursor) in real development work
Strong code review skills applied to AI output — quickly assessing, validating, refining and testing AI-generated code
Experience with automated testing and version control
Strong teamwork and communication skills, with the ability to collaborate effectively with cross-functional teams
Excellent problem-solving skills and a proactive approach to identifying and resolving issues
Willingness to learn and develop deep financial knowledge

Responsibilities

Design and develop fixed income analytics applications, used by front office for trading and investment decision-making
Implement and enhance the Structuring Tool for securitized products, used for Securitized Product analysis and marketing
Maintain and modernize the existing codebase while preserving product stability
Use AI coding assistants and agentic tools to accelerate development, testing, and code understanding
Partner with product management and client service teams to solve product issues and deliver new features
Create unit tests and integration tests to ensure software meets requirements
Work closely with the Quality Engineering team to ensure the high quality of the deliverables