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Backend Engineer with 4+ years of experience building low-latency, high-throughput distributed systems for financial markets at London Stock Exchange Group. Specialized in Kafka-based event-driven architectures, exactly-once processing, and crossregion disaster recovery. Delivered systems processing 10,000 messages/sec with sub-100ms latency and RPO = 0.…

Mahela Hennayake

Back-End Developer, Full Stack Developer, DevOps Developer, +1

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Backend Engineer with 4+ years of experience building low-latency, high-throughput distributed systems for financial markets at London Stock Exchange Group. Specialized in Kafka-based event-driven architectures, exactly-once processing, and crossregion disaster recovery. Delivered systems processing 10,000 messages/sec with sub-100ms latency and RPO = 0.…

Available to hire

Backend Engineer with 4+ years of experience building low-latency, high-throughput distributed systems for financial markets
at London Stock Exchange Group. Specialized in Kafka-based event-driven architectures, exactly-once processing, and crossregion
disaster recovery. Delivered systems processing 10,000 messages/sec with sub-100ms latency and RPO = 0.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Software Engineer Intern at LSEG Technology

December 1, 2021 - September 1, 2022

Designed and implemented a type-safe, extensible FIX-to-ProtoBuf translation framework using Java generics and the Template Method pattern, enabling bidirectional transformation across multiple trading gateways. Engineered reusable mapping components (including enumeration translation and complex FIX group handling) and centralized protocol definitions (600+ FIX tags, 500+ ProtoBuf fields). Built Kafka-based streaming health checks to monitor producer vs. consumer processing rates and support zero data-loss onboarding.

Senior Software Engineer at LSEG Technology

April 1, 2024 - September 1, 2025

Optimized system performance through profiling (JPProfiler, thread dumps) to achieve under 100 ms latency across 12 partitions. Led migration toward Kafka-to-database ingestion pipelines, redesigned to support 12 partitions, with a target RPO=0. Devised a cross-region disaster recovery architecture for 15+ microservice trading platform; introduced DR-specific components and round-robin load balancing to ensure seamless recovery and zero data loss.