Quantitative Developer

London Stock Exchange Group; Buffalo, Northern (NY, KY); Hybrid; USD 99,000 - 164,000; Full time

Benefits offered by this job

Annual Wellness Allowance

Medical

Dental

Vision

401(K) Savings Plan with Company match

Paid time-off

Job summary

London Stock Exchange Group is seeking an Application Developer to join the Fixed Income Analytics Application Development team in Buffalo, NY. You design and build fixed income analytics applications used by the front office for trading decisions, and enhance the Structuring Tool for securitized products.

You will modernize the codebase, leverage AI coding assistants, collaborate with product management and client services, and create unit/integration tests to ensure quality.

Qualifications

• Master's degree or higher in a quantitative field (e.g., Financial Engineering, CS, Physics, Engineering, Mathematics)
• Excellent programming skills in C/C++, .NET, Java or Python
• 1–3 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 and testing AI-generated code
• Experience with automated testing and version control
• Strong teamwork and communication skills with cross-functional teams
• Willingness to learn and develop deep financial knowledge

Responsibilities

• Design and develop fixed income analytics applications used by front office for trading and investment decisions
• Implement and enhance the Structuring Tool for securitized products used for 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 Quality Engineering to ensure high quality deliverables

Skills

C/C++

.NET

Java

Python

AI coding assistants

Code review

Testing & version control

Teamwork & communication

Education

Master's degree in quantitative field

Tools

Git

Job description

Job Description London Stock Exchange Group is looking for an application developer to join a team of Fixed Income Analytics Application Development.

Main 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

Essential Skills and Experience

• 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

Career Stage

Senior Associate

Compensation and Benefits

LSEG is committed to offering competitive Compensation and Benefits. The anticipated base salary for this position is $98,500 - $164,100. Please be aware base salary ranges may vary by geographic location, city and state. In addition to our offered base salary, this role is eligible for our Annual Incentive Plan (AIP/”bonus plan”). Target AIP rates will be commensurate with role level and posted career stage. Individual salary will be reflective of job related knowledge, skills and equivalent experience.

Annual Incentive Plan (AIP/”bonus plan”).

• Annual Wellness Allowance
• Paid time-off
• Medical
• Dental
• Vision
• Flex Spending & Health Savings Options
• Prescription Drug plan
• 401(K) Savings Plan
• Company match
• basic life insurance
• disability benefits
• emergency backup dependent care
• adoption assistance commuter assistance etc.

LSEG roles (excluding internships and part-time roles of less than 20 hours per week) are typically eligible for inclusion in our LSEG Benefits program, which includes offerings of: Annual Wellness Allowance, Paid time-off, Medical, Dental, Vision, Flex Spending & Health Savings Options, Prescription Drug plan, 401(K) Savings Plan and Company match.

LSEG’s Benefits plan also includes basic life insurance, disability benefits, emergency backup dependent care, adoption assistance commuter assistance etc.

About LSEG

Join us and be part of a team that values innovation, quality, and continuous improvement. If you're ready to take your career to the next level and make a significant impact, we'd love to hear from you. LSEG is a leading global financial markets infrastructure and data provider. Our purpose is driving financial stability, empowering economies and enabling customers to create sustainable growth. Our purpose is the foundation on which our culture is built. Our values of Integrity, Partnership, Excellence and Change underpin our purpose and set the standard for everything we do, every day. They go to the heart of who we are and guide our decision making and everyday actions. Working with us means that you will be part of a dynamic organisation of 25,000 people across 65 countries. However, we will value your individuality and enable you to bring your true self to work so you can help enrich our diverse workforce. We are proud to be an equal opportunities employer. This means that we do not discriminate on the basis of anyone’s race, religion, colour, national origin, gender, sexual orientation, gender identity, gender expression, age, marital status, veteran status, pregnancy or disability, or any other basis protected under applicable law. Conforming with applicable law, we can reasonably accommodate applicants' and employees' religious practices and beliefs, as well as mental health or physical disability needs. You will be part of a collaborative and creative culture where we encourage new ideas. We are committed to sustainability across our global business and we are proud to partner with our customers to help them meet their sustainability objectives. Our charity, the LSEG Foundation provides charitable grants to community groups that help people access economic opportunities and build a secure future with financial independence. Colleagues can get involved through fundraising and volunteering. LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.

Please take a moment to read this privacy notice carefully, as it describes what personal information London Stock Exchange Group (LSEG) (we) may hold about you, what it’s used for, and how it’s obtained, your rights and how to contact us as a data subject. If you are submitting as a Recruitment Agency Partner, it is essential and your responsibility to ensure that candidates applying to LSEG are aware of this privacy notice.