Data & Search — pipelines that hold under load.
OpenSearch migrations, Medallion data contracts, real-time streaming SLAs, and the engineering discipline that keeps analytics honest when teams and data volumes grow.
What you need to know about data & search
The Medallion architecture — Bronze, Silver, and Gold data layers — provides a structured approach to data quality that enterprise analytics teams can enforce without rebuilding pipelines every quarter. A data contract formalises the agreement between data producers and consumers: schema, SLA, and quality guarantees that are machine-checked rather than documented in a wiki no one reads. OpenSearch has emerged as the production-grade alternative to managed Elasticsearch for search workloads at enterprise scale — particularly for financial services teams that require data residency and self-hosted deployment. AiRAT's data engineering notes cover Medallion implementation, data contract patterns, real-time streaming with Kafka and Flink, OpenSearch tuning for finance workloads, and the architectural decisions that keep data platforms honest under growth.