Senior Python Engineer – Engineered Index & Rates

LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs.

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. We embrace diversity and actively seek to attract individuals with unique backgrounds and perspectives. We break down barriers and encourage teamwork, enabling innovation and rapid development of solutions that make a difference.

The Engineered Product Solutions vertical within the FICC Engineering team develops and supports platforms that enable the ideation, back testing, construction, and production of custom, thematic, and bespoke index and benchmark solutions across Fixed Income, Interest Rates, Currencies, and Commodities (FICC).

We are seeking a Senior Python Engineer to develop, enhance, and support these platforms and solutions. The ideal candidate is a hands‑on engineer with strong technical and quantitative software development expertise, including the design and implementation of index/benchmark portfolio construction, index and benchmark analytics, systematic investment strategies, and related quantitative tools and frameworks.

What You'll Be Doing:

• Develop and maintain platforms and tools supporting custom, thematic, and bespoke FICC index and benchmark solutions, with a focus on engineered products and rates.
• Design and implement scalable, reliable, and maintainable software solutions using modern engineering practices.
• Collaborate with product, research, and index teams to translate business requirements into technical solutions.
• Investigate, troubleshoot, and resolve complex production, data, and application issues through structured root-cause analysis.
• Drive platform modernization initiatives, including cloud adoption and improvements to development and deployment processes.
• Enhance software quality, automation, and operational efficiency through testing, code reviews, and CI/CD best practices.
• Work across a diverse technology stack, including Python, Linux, cloud technologies, and legacy applications.
• Take ownership of projects throughout the full development lifecycle, from solution design and implementation to production support.

What You'll Bring:

• Significant hands‑on software development experience (typically 7+ years), preferably in financial services or data‑intensive environments.
• Strong Python development skills and experience working in Linux-based environments, demonstrated hands‑on programming experience and a solid understanding of software engineering principles.
• Strong software engineering fundamentals, including system design, testing, code quality, and performance optimization.
• Demonstrated ability to independently investigate and solve complex technical problems.
• Experience developing and supporting production systems in a business‑critical environment.
• Experience working with source control and CI/CD tools (e.g., Git, GitLab).
• Strong SQL and data processing experience.
• Ability to quickly learn new technologies, business domains, and data models.
• Strong sense of ownership and accountability, with the ability to drive work independently.
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related quantitative discipline.

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.