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sashika achintha

@sashikaachintha

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Senior backend engineer building distributed, reactive event-driven platforms for fintech and travel risk.

Sri Lanka

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What I'm looking for

I’m looking for a team where I can build secure, tenant-aware, reactive backend services and distributed event-driven pipelines—using cloud-native tools and real-time delivery—while continuing to improve performance, reliability, and engineering quality.

I’m a Senior Backend Engineer focused on designing distributed, event-driven backend platforms in fintech and enterprise travel risk intelligence. I specialize in Java, Spring Boot, Reactive Programming, cloud-native architectures, and real-time messaging systems—especially tenant-aware, secure designs that keep data boundaries clear.

In my current role, I architected a real-time Server-Sent Events (SSE) streaming platform with tenant-aware routing to eliminate cross-tenant data exposure, and I built pipelines for severe-weather intelligence and pre-travel advisory risk content using a provider-factory architecture. Previously at London Stock Exchange Group, I developed low-latency C++ market-data dissemination components, strengthened reliability with component and end-to-end testing, and resolved security and static-analysis findings (Coverity) while debugging memory issues using AddressSanitizer.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Restrata

Apr 2025 - Present (1 year 3 months)

Architected and implemented a real-time SSE streaming platform with tenant-aware routing to prevent cross-tenant data exposure. Built travel-risk advisory and intelligence pipelines using reactive Spring WebFlux and event-driven messaging.

Server Sent Events (SSE)Tenant Routing Reactive Programming Java Spring Boot Webflux Project Reactor Event Driven Architecture AWS S3 SQS PostgreSQL LocalStack REST APIs Microservices Provider Factory Architecture

Software Engineer

London Stock Exchange Group

Aug 2023 - Mar 2025 (1 year 7 months)

Developed and maintained low-latency market-data dissemination components for the FXI program, including credit-library functionality. Improved reliability via component testing and resolved security/static-analysis and memory issues using tooling.

C#Low Latency Systems Market Data Java Cucumber Coverity AddressSanitizer Static Analysis Agile Scrum

Education

Degrees, certifications, and relevant coursework

University of Moratuwa

Bachelor of Science (Honours), Mechanical Engineering

2017 - 2022

Grade: Second Class Upper (Highest overall mark in Control Systems & Instrumentation)

Activities and societies: Prof. G. K. Watugala Memorial Award

B.Sc (Hons) in Mechanical Engineering at the University of Moratuwa (2017–2022), earning a Second Class Upper and the Prof. G. K. Watugala Memorial Award. Achieved the highest overall mark in Control Systems & Instrumentation modules.