At Rippling's core is a sophisticated data platform that connects thousands of data sources through the employee record, creating a comprehensive graph that powers our entire ecosystem. This employee-centric graph enables complex workflows, approval processes, permission systems, and analytical capabilities. We're building a high-performance, distributed data platform that must support real-time event processing across thousands of integrations, complex data transformations and enrichment workflows, low-latency queries for interactive user experiences, massive scale processing for analytics and reporting, and cross-system data consistency with strong reliability guarantees. Our technology stack includes Kafka, Flink, MongoDB, PostgreSQL, Apache Pinot, Apache Presto, Amazon S3-each carefully selected to address specific data processing patterns and access requirements.