Lead Software Engineer - Data Platform

You'll design and build scalable data systems using Python, Spark and AWS, while also shaping engineering standards, guiding other engineers, and helping the team make sound technical and architectural decisions. This is an opportunity to influence how the platform is built, not just contribute to it. What makes this role different This isn't about maintaining pipelines or working within a fixed framework. We're looking for someone who will:

• Bring strong software engineering fundamentals into a data platform environment
• Improve how engineering is done, not just what is delivered
• Work closely with stakeholders to shape solutions, not just implement requirements
• Balance hands-on delivery with technical leadership and influence
If you enjoy solving real problems, challenging assumptions, and building systems properly - this is the role for you. WHAT YOU'LL BE DOING: Build & deliver
• Design and develop scalable, testable data pipelines using Python and Apache Spark
• Build and orchestrate data workflows using AWS services (e.g. Glue, EMR Serverless, Lambda, S3)
• Contribute to the evolution of a modern lakehouse architecture (e.g. Apache Iceberg)
• Work with relational databases, particularly PostgreSQL / Aurora PostgreSQL
Drive engineering excellence
• Apply and champion strong software engineering practices:
testing, CI/CD, modular design, refactoring and code quality
• Improve the maintainability, reliability and scalability of systems
• Identify and address weak engineering practices across the team
Lead technically & influence direction
• Lead technical discussions and contribute to architecture decisions
• Translate business problems into practical, well-designed technical solutions
• Challenge requirements where needed and help define what should (and shouldn't) be built
• Coach and support junior and mid-level engineers through code reviews and guidance
• Help raise the overall engineering bar across the team
Seniority & impact This is a senior individual contributor role with a strong technical leadership component.
• ~75% hands-on engineering
• ~25% technical leadership, coaching and stakeholder engagement
While not a pure people-management role, you may support a small number of engineers and will be expected to:
• Set direction
• Influence standards
• Lead from the front
We are looking for a hands-on technical leader, not a delivery manager.


• Software engineers first, with experience working on data platforms or data-intensive systems
• Comfortable building production-grade systems using Python, databases, and modern engineering practices
• Able to make sound architectural decisions, balancing trade-offs pragmatically
• Confident engaging stakeholders and shaping solutions from ambiguous requirements
• Experienced in improving engineering standards and supporting other engineers
• Hands-on technical leaders, not purely managerial or tool-specific specialists
We value strong fundamentals and adaptability over experience with any specific tools. Nice to have
• Experience with Apache Spark or distributed data processing
• Familiarity with AWS data services
• Exposure to modern data architectures (lakehouse, Iceberg, etc.)
• Interest in financial markets, indices, or data-driven products, If you're a strong software engineer who enjoys working in data and wants to help shape both systems and standards - we'd love to hear from you.
  
  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 organization 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!, At FTSE Russell, we're building the next-generation data platform that underpins the indices trusted by financial institutions around the world., 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.