Senior Python Engineer - Engineered Index & Rates

LSEG Business Services RM; Greater London; On-site; GBP 90,000 - 140,000; Full time

Job summary

LSEG Business Services RM is seeking a Senior Python Engineer to develop and support platforms for engineered FICC index and benchmark solutions. You will craft scalable software across Python, Linux, and cloud technologies, contributing to design and production support with a focus on reliability and performance.

The role emphasizes ownership, collaboration with cross-functional teams, and driving modernization through cloud adoption and improved development processes.

Qualifications

• Significant hands-on software development experience (typically 7+ years).
• Strong Python development skills and Linux-based experience.
• Strong fundamentals in system design, testing, and performance optimization.

Responsibilities

• Develop and maintain platforms and tools for FICC index/benchmark solutions.
• Design scalable, reliable software using modern engineering practices.
• Collaborate with product, research, and index teams to translate requirements.
• Troubleshoot complex production, data, and application issues with root-cause analysis.
• Drive platform modernization including cloud adoption and dev/ops improvements.
• Improve software quality through testing, code reviews, and CI/CD.

Skills

Python

Linux

Cloud technologies

CI/CD

Tools

CI/CD

Job description

ABOUT US:

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. It's how we've contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services - and our open-access model - we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.

LSEG is headquartered in the United Kingdom, with significant operations in 70 countries across EMEA, North America, Latin America and Asia Pacific. We employ 25,000 people globally, more than half located in Asia Pacific. LSEG's ticker symbol is LSEG.

OUR PEOPLE:

People are at the heart of what we do and drive the success of our business. Our culture of connecting, creating opportunity and delivering excellence shape 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. Our workplace generates an enriching and rewarding experience for our people and customers alike. Our vision is to build an inclusive culture in which everyone feels encouraged to fulfil their potential.

We know that real personal growth cannot be achieved by simply climbing a career ladder - which is why we encourage and enable a wealth of avenues and interesting opportunities for everyone to broaden and deepen their skills and expertise. As a global organisation spanning 70 countries and one rooted in a culture of growth, opportunity, diversity and innovation, LSEG is a place where everyone can grow, develop and fulfil your potential with meaningful careers!!

THE TEAM:

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).

ROLE SUMMARY:

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.

Success in this role requires the ability to independently learn new technologies and business concepts, troubleshoot challenging technical issues, and deliver high‑quality solutions with minimal supervision. The candidate should demonstrate a strong sense of ownership and accountability, excellent collaboration and communication skills, and a commitment to continuous improvement and engineering excellence.

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.
• Exp