Design, build, and operate Java-based ETL/ELT and streaming ingestion services that transform source data into optimized OpenSearch schemas. Own schema design, data quality, indexing performance, monitoring, alerting, APIs, re-indexing, and retention strategies for a multi-tenant, multi-region SaaS platform. Collaborate with Search and Quality Engineering teams on relevance tuning, experimentation, and scalability while optimizing pipeline performance and cost.