Quantitative Python Developer

LSEG•Buffalo, NY

About The Position

Role Purpose The Model Validation team is responsible for independently validating and monitoring cross-asset models and analytics delivered by LSEG to its clients. Key Responsibilities Design and implement validation framework to assess the performance of analytics produced by LSEG quantitative Libraries. Perform in‑depth validation of quantitative models and evaluate them using relevant performance metrics. Design and implement a technical solution to validate and monitor financial models Develop an understanding of the quantitative library and its key components. Produce clear, well‑structured validation reports and present findings to internal collaborators. Define model testing strategies and document model methodologies and assumptions. Contribute to build and maintain the automated tests framework. Apply strong knowledge of financial markets, including pricing conventions, valuation assumptions. Deliver high‑quality insights and support with a strong customer‑focused mindset. Solve complex analytical and technical problems with a high degree of independence. About LSEG 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. You will be part of a collaborative and creative culture where we encourage new ideas and are committed to sustainability across our global business. You will experience the critical role we have in helping to re-engineer the financial ecosystem to support and drive sustainable economic growth. Together, we are aiming to achieve this growth by accelerating the just transition to net zero, enabling growth of the green economy and creating inclusive economic opportunity. LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives. 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. Career Stage: Senior Associate Compensation/Benefits Information: LSEG is committed to offering competitive Compensation and Benefits. The anticipated base salary for this position is $108,800 - $181,300. 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. 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. London Stock Exchange Group (LSEG) Information: 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. If you want to apply for a job, please click the Apply button. You will then be redirected to our Careers sign-in page where you can enter your existing credentials or set up an account with us. If there is nothing that currently suits you, feel free to send us your Resume/CV LSEG (London Stock Exchange Group) 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 culture of connecting, creating opportunity and delivering excellence shapes how we think, how we do things and how we help our people fulfil their potential. Our Data & Analytics, Capital Markets and Post Trade divisions have a combined power that provides a comprehensive, integrated suite of trusted financial market infrastructure services to help our customers pursue their ambitions. Explore our divisions LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across Europe, the Middle East, Africa, North America, Latin America and Asia Pacific. Find out more Get to know some of our people who are pushing the boundaries of technology, finance and more around the world.

Requirements

Solid understanding of quantitative models and methodologies, with the ability to critically assess and validate them.
Strong proficiency in Python (good development practices) and experience with key data structures and libraries.
Demonstrated understanding of CI/CD principles
Knowledge of financial markets, products, and pricing frameworks.
Strong problem‑solving skills and the ability to work on sophisticated model‑related challenges.

Responsibilities

Design and implement validation framework to assess the performance of analytics produced by LSEG quantitative Libraries.
Perform in‑depth validation of quantitative models and evaluate them using relevant performance metrics.
Design and implement a technical solution to validate and monitor financial models
Develop an understanding of the quantitative library and its key components.
Produce clear, well‑structured validation reports and present findings to internal collaborators.
Define model testing strategies and document model methodologies and assumptions.
Contribute to build and maintain the automated tests framework.
Apply strong knowledge of financial markets, including pricing conventions, valuation assumptions.
Deliver high‑quality insights and support with a strong customer‑focused mindset.
Solve complex analytical and technical problems with a high degree of independence.

Benefits

LSEG offers a range of tailored benefits and support, including healthcare, retirement planning, paid volunteering days and wellbeing initiatives.
Annual Wellness Allowance
Paid time-off
Medical
Dental
Vision
Flex Spending & Health Savings Options
Prescription Drug plan
401(K) Savings Plan and Company match
basic life insurance
disability benefits
emergency backup dependent care
adoption assistance commuter assistance