FTSE Russell is a leading global provider of financial services, specialising in the creation and management of indexes, data, and analytic solutions. As part of the London Stock Exchange Group (LSEG), we support investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Our products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk.

Job Summary

We're seeking a Senior Software Engineer to join the team building next-generation distribution capabilities for our index products. You'll be delivering index data to the global financial community across multiple channels including APIs, cloud data platforms, file-based delivery, and AI-native protocols. Reliability, security, and data quality are non-negotiable as we build out scalable, cloud-native infrastructure.

The ideal candidate is a self-sufficient, technically excellent engineer who can lead through architectural clarity, thorough code review, and hands-on delivery. You combine strong expertise in system design, data modelling, and debugging with genuine passion for how AI tooling is redefining software engineering. This is an individual contributor role where you will lead through the quality of your thinking and your engineering standards.

AI-First Engineering This team operates with an AI-first approach. We expect hands-on experience with AI development tooling: terminal-based agents, AI-augmented IDEs, and automated workflows. You are ultimately accountable for production quality, security, and correctness. This means owning infrastructure review, security validation, system observability, and operational guardrails.

What You'll Do

• Design, build, and scale cloud-native distribution infrastructure with high resilience and performance requirements.
• Own system design and data modelling for sophisticated, multi-schema relational databases serving dynamic data workloads.
• Develop and maintain infrastructure as code, ensuring environments are reproducible, version-controlled, and secure.
• Design and implement test strategies including integration, contract, and end-to-end validation.
• Build secure, well-documented APIs and data delivery services for institutional financial clients.
• Lead technical direction through architectural guidance, code review, and pairing.
• Partner with product, operations, and client-facing teams to translate requirements into robust technical solutions.

Tech Stack

• Development: TypeScript, Angular/React, Python, SQL, OpenAPI
• Cloud: AWS (Lambda, API Gateway, S3, SQS, SNS, Aurora, and others as required)
• Databases: PostgreSQL, Apache Iceberg, DynamoDB, VectorDB (e.g. ChromaDB)
• IaC and CI/CD: Terraform, AWS CLI, GitLab
• AI Development: Agentic AI tooling (e.g. GitHub Copilot, Claude Code)

Experience We Value

• 7+ years of professional software engineering experience.
• Strong expertise in system design, distributed systems, and relational data modelling.
• Solid experience building and operating cloud-native applications on AWS.
• Ability to write and maintain infrastructure as code (Terraform or equivalent).
• Experience designing test strategies at multiple levels of the testing pyramid.
• Proficiency with AI development tooling and a clear understanding of how to use AI to accelerate delivery while maintaining quality.
• Strong debugging skills across distributed systems.
• Basic understanding of financial services or capital markets.
• Effective collaboration and the ability to communicate technical decisions to non-technical audiences.

How We Work

The Distribution team drives the development of innovative and secure products that power our services and meet the evolving needs of our clients. We foster a culture of engineering excellence, solving real-world problems with purpose and ambition. We're looking for skilled and passionate engineers to drive the future of modern solutions working with leading AI development tools.

• Build with purpose. Start with why. Define the problem before reaching for a solution.
• Customer driven. Work backwards from client needs and build products to address real-world problems.
• Technically courageous. Go beyond your comfort zone and push boundaries to deliver excellence.
• Learn and be curious. Continuously seek feedback, learn in formal and informal settings, actively share knowledge.
• Act as owners. Operate as though it is your business. Make thoughtful trade-offs and deliver long-term value.
• Lead with data. Validate assumptions, stay close to the details, act decisively.
• Build responsibly, deliver incrementally. Look for the small opportunities and milestones to build ambitious solutions.
• AI-native by default. Use AI tooling as a force multiplier, frame problems clearly, validate continually, and own the output.

Location: London (Hybrid, 3 days/week in office)

Career Stage:

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.

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