Karel Alfonso Sague

About KAREL
Senior Software Engineer in the Block Data Platform team

Karel is a software engineer currently working at CashApp (Block) in the Data Platform team. He enjoys the challenges of working in infrastructure applied to data engineering. Karel has more than 20 years experience in the IT industry.

He has shared his knowledge in multiple conferences: Voxxed Days Australia, Hadoop Summit and local community events. Prior to working at Block he worked as a consultant for Thoughtworks across multiple industries. Outside of work Karel loves spending time with his family, hiking, bike riding and dancing.

Riding the Streams: Powering Stream Processing at Cash App with FLINK

Melbourne & Sydney
Cloud First

Over the last 5 years, Cash App migrated from a monolith to a service oriented architecture. At present we have hundreds of services communicating via event streams. These services provide solutions across multiple areas like ML, financial reporting, data warehouse ingestion and materialised views. Flink on Ververica is the technology that we use to power these streaming use cases.

The purpose of this talk is to share our journey enabling self-serve streaming applications using Apache Flink and Ververica at Cash. We’ll cover infrastructure automation, operations, the main use cases we have implemented and learnings from operationalising Flink applications in production.

Tags: Flink, Ververica, Kubernetes, service-mesh, Infrastructure as Code, operations

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