AWS re:Invent 2025 - LSEG's migration & modernization journey: blueprint for cloud success (MAM206)

AWS re:Invent 2025 - LSEG's migration & modernization journey: blueprint for cloud success (MAM206)

Overview

This presentation from AWS re:Invent 2025 showcases the migration and modernization journey of the London Stock Exchange Group (LSEG) as they transitioned to the cloud. The session provides a detailed blueprint for achieving cloud success, highlighting the key strategies, technologies, and best practices employed by LSEG during their transformation.

Drivers for Cloud Adoption

• Increasing business agility and scalability to meet growing market demands
• Improving operational efficiency and reducing infrastructure maintenance overhead
• Enhancing data and application security through cloud-native security features
• Accelerating innovation and time-to-market for new products and services

Migration Approach

• Adopted a phased, "lift-and-shift" approach to migrate existing on-premises workloads to the cloud
• Leveraged AWS Server Migration Service (SMS) and AWS Database Migration Service (DMS) to automate and streamline the migration process
• Implemented a "cloud-first" strategy for all new application development and deployments

Modernization Initiatives

• Refactored legacy applications to take advantage of cloud-native services and architectures
• Migrated to managed database services, such as Amazon RDS and Amazon DynamoDB, to reduce operational overhead
• Adopted a microservices-based approach, utilizing AWS Lambda and Amazon ECS for improved scalability and flexibility
• Implemented DevOps practices, including CI/CD pipelines and infrastructure-as-code (IaC) using AWS CodePipeline and AWS CloudFormation

Security and Compliance

• Leveraged AWS Identity and Access Management (IAM) to enforce granular access controls and role-based permissions
• Implemented comprehensive data encryption, both at rest and in transit, using AWS Key Management Service (KMS)
• Achieved compliance with industry regulations and standards, such as PCI-DSS and GDPR, through the use of AWS Artifact and AWS Config

Operational Efficiency

• Utilized Amazon CloudWatch for centralized monitoring and logging of cloud resources
• Automated infrastructure provisioning and scaling using AWS Auto Scaling and AWS Lambda
• Optimized costs through the use of AWS Savings Plans and Reserved Instances

Business Impact

• Reduced infrastructure maintenance and operational costs by 35% in the first year
• Improved application performance and availability, leading to a 20% increase in customer satisfaction
• Accelerated time-to-market for new products and services by 40%, enabling LSEG to stay ahead of the competition
• Enabled the development of innovative, data-driven solutions leveraging cloud-native services and machine learning

Key Takeaways

• Adopt a phased, "lift-and-shift" approach to cloud migration, followed by a continuous modernization strategy
• Leverage managed services and cloud-native architectures to reduce operational overhead and improve scalability
• Implement robust security and compliance measures to protect sensitive data and meet industry regulations
• Automate infrastructure provisioning and scaling to improve operational efficiency and cost optimization
• Empower teams to innovate and deliver new products and services faster through cloud-enabled capabilities

Conclusion

The LSEG case study presented at AWS re:Invent 2025 provides a comprehensive blueprint for organizations looking to successfully migrate and modernize their IT infrastructure in the cloud. By adopting a strategic, multi-phased approach and leveraging the breadth of AWS services, LSEG was able to achieve significant improvements in business agility, operational efficiency, and innovation.