London Stock Exchange Group (LSEG) – Platinum Group
Business Context
London Stock Exchange Group operates mission-critical financial market infrastructure systems supporting global capital markets. The Convertible Bonds Index Calculator is a core backend platform responsible for processing large volumes of market data and producing index outputs with strict reliability, latency, and regulatory requirements.
Challenge
– Process thousands of messages per second and over 1M transactions per day
– Ingest and integrate data from multiple internal source systems
– Coordinate complex distributed workflows reliably
– Provide internal tooling for operations, compliance, and monitoring
– Modernise frontend systems while maintaining legacy compatibility
Pixel Horizon Contribution
Pixel Horizon engineers contributed to backend architecture, high-throughput integrations, workflow orchestration, and frontend modernisation.
Key Responsibilities
– Designed and implemented event-driven microservices
– Built high-volume data ingestion and transformation pipelines
– Developed APIs and background processors for index calculation workflows
– Implemented asynchronous orchestration using Azure Service Bus
– Built internal operational and compliance interfaces
– Supported micro-frontend migration to React/Redux
Technical Stack
Backend: C#, .NET 7, .NET Core, ASP.NET Core, Multithreading
Architecture: Microservices, Event-Driven Design
Cloud & Integration: Azure Functions, Azure Service Bus, Event Grid, Azure API Management, Azure Data Factory
Data & Caching: SQL Server, Azure Blob Storage, Redis
Frontend: ASP.NET MVC, Micro-Frontend Architecture, React, Redux
DevOps & Quality: Docker, Docker Compose, Kubernetes, Git, xUnit, TDD, Agile (Scrum), JIRA
Outcome
– Reliable processing of millions of daily transactions
– Scalable, fault-tolerant event-driven architecture
– Improved operational visibility and compliance tooling
– Enterprise-grade platform aligned with global capital markets standards
