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In-Person
August 26, 2025

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Evolving Critical Systems With GRPC: Bidirectional at Scale — What Works, What Hurts, What’s Next? - Thiyagarajan Velappan, Mastercard Inc., ; Eric Robins, Mastercard ; Ravi Cherukuru, Mastercard International; Prasanna Srinivasan Narasimhan & Jenny Zhang
Tuesday August 26, 2025 12:10pm - 12:30pm PDT
Red Willow
Modern enterprises are embracing gRPC to modernize their most critical systems - systems that were once built on legacy stack. But as we scale, especially with bidirectional streaming, things get complex fast.

In this panel, seasoned engineers from one of the largest production deployments of gRPC will openly discuss:

- What worked well when scaling bidirectional gRPC in production
- What really hurt: hidden pitfalls, debugging nightmares, resource bottlenecks
- Design patterns and tradeoffs around stream multiplexing, client-side routing, observability, and backpressure
- Where the ecosystem can improve: tooling gaps, protocol evolution, and developer experience
Speakers
avatar for Thiyagarajan Velappan

Thiyagarajan Velappan

Sr Principal Software Engineer, Mastercard Inc
Thiyagarajan Velappan is a Sr Principal Architect and one of the founding contributors to the internal gRPC Special Interest Group. With deep expertise in designing distributed systems for scale, resilience, and performance, and led multiple successful modernizations of critical systems... Read More →
avatar for Eric Robins

Eric Robins

Security Architect, Mastercard
With over 26 years of experience in the IT industry, Eric is a trusted subject matter expert in the areas of application security, security architecture, identity access management and application-applied cryptography. He is routinely assigned to many of Mastercard’s larger and... Read More →
avatar for Ravi Cherukuru

Ravi Cherukuru

Senior Principal Software Engineer, Mastercard International
I’m Ravi Cherukuru, the Senior Principal Software Engineer at Mastercard, responsible for designing low-latency, high-volume, scalable real-time payment applications and providing technology vision and development. I hold a Master’s degree in Cybersecurity Management from WashU... Read More →
avatar for Prasanna Srinivasan Narasimhan

Prasanna Srinivasan Narasimhan

Director, Software Engineering, Mastercard
Prasanna S Narasimhan leads the modernization of the Mastercard's global Payment Network through the Next Edge platform. His work enables seamless, unified access to Mastercard’s products and services across edge and cloud environments. With multiple patents in fintech and a strong... Read More →
avatar for Jenny Zhang

Jenny Zhang

Distinguished Engineer, Mastercard
Jenny Zhang is a Distinguished Engineer with three decades of dedicated service at Mastercard. She began her professional journey at Mastercard in 1995 as a software engineer. Over the years, she evolved into roles of increasing responsibility and impact across multiple domains as... Read More →
Tuesday August 26, 2025 12:10pm - 12:30pm PDT
Red Willow
  gRPC in-production

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