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Jacob Gollub

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talks

Software Engineer Square

Jacob Gollub is a Software Engineer at Square. He joined as the first member of the Financial Data team, which partners with Engineering/Data Science/Machine Learning teams to improve their processes for publishing and consuming data, specifically within the banking domain. During his tenure, he's led projects that have unblocked key product initiatives by making it easy for customers to work with high-quality datasets. Before entering the data world, he worked on a number of backend product and platform teams at a fintech startup.

Bio from: Data + AI Summit 2025

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Mastering Change Data Capture With Lakeflow Declarative Pipelines

Transactional systems are a common source of data for analytics, and Change Data Capture (CDC) offers an efficient way to extract only what’s changed. However, ingesting CDC data into an analytics system comes with challenges, such as handling out-of-order events or maintaining global order across multiple streams. These issues often require complex, stateful stream processing logic.This session will explore how Lakeflow Declarative Pipelines simplifies CDC ingestion using the Apply Changes function. With Apply Changes, global ordering across multiple change feeds is handled automatically — there is no need to manually manage state or understand advanced streaming concepts like watermarks. It supports both snapshot-based inputs from cloud storage and continuous change feeds from systems like message buses, reducing complexity for common streaming use cases.