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Ragul JayakanthanRJ
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Ragul Jayakanthan

@raguljayakanthan

I build event-driven, multi-tenant retail SaaS platforms, offline-first POS systems, and real-time analytics infrastructure.

India
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I've spent my continuous tenure since 2021 building retail technology across Casa Retail AI and BillingStudio, from CRM event infrastructure to an offline-first point-of-sale platform.

At Casa Retail AI, I architected a Kafka-to-ClickHouse pipeline processing millions of events daily with sub-second latency for 100+ retail tenants. I also built CRM services, campaign execution, Commerce Connect integrations, Shopify flows, and a highly available ClickHouse cluster.

As BillingStudio's lead and founding engineer, I architected a multi-tenant POS platform with OAuth2/OIDC, Kafka streaming, location-scoped access control, offline synchronization, and cloud-to-edge catalog syncing. I built its Electron desktop POS, React admin console, real-time dashboard APIs, and receipt-template engine.

I enjoy designing systems from scratch and making complex data, sync, and operational workflows reliable at scale. My work spans Node.js, NestJS, React, Scala, Kafka, ClickHouse, PostgreSQL, Docker, and offline-first architecture.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

Sri Eshwar College of Engineering logoSE

Sri Eshwar College of Engineering

Bachelor of Engineering, Computer Science and Engineering

Completed a Bachelor of Engineering in Computer Science and Engineering in 2021.

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