AI-First Senior Software Engineer – Index Distribution

LSEG; City Of London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

London Stock Exchange Group (LSEG) is seeking a Senior Software Engineer to join the Distribution team in London. You will design, build, and scale cloud-native distribution infrastructure for index data, delivering across APIs, cloud platforms, and file-based channels with a focus on reliability, security and data quality.

You will lead through architectural clarity, code reviews and hands-on delivery, applying AI tooling to accelerate delivery while maintaining quality.

Qualifications

• 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.

Responsibilities

• 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.

Skills

System design

Distributed systems

AWS

Cloud-native

Data modelling

Debugging

AI tooling

Communication

Leadership

Tools

Terraform

OpenAPI

PostgreSQL

Iceberg

DynamoDB

GitLab

TypeScript

Python

React/Angular

Job description

London Stock Exchange Group (LSEG) is seeking a Senior Software Engineer to join the Distribution team in London. You will design, build, and scale cloud-native distribution infrastructure for index data, delivering across APIs, cloud platforms, and file-based channels with a focus on reliability, security and data quality.

You will lead through architectural clarity, code reviews and hands-on delivery, applying AI tooling to accelerate delivery while maintaining quality.