• Design, build, and maintain AWS OpenSearch indexes, mappings, analyzers, and index templates • Develop .NET 8 (C#) backend services that ingest, index, and query data from OpenSearch • Implement and optimize OpenSearch query DSL for performance, relevance, and scalability • Design and maintain data ingestion pipelines that collect content from: Databases (relational and NoSQL), File-based sources (S3, documents, exports), External systems and APIs, Websites or content feeds (where applicable) • Normalize, enrich, and transform content prior to indexing (metadata extraction, text processing, field mapping) • Build and expose search APIs using AWS Lambda and API Gateway • Support batch and near–real-time indexing workflows • Deploy and operate services on AWS ECS and/or EC2 • Monitor, troubleshoot, and tune OpenSearch cluster health, indexing throughput, and query performance • Collaborate with frontend teams building React-based search experiences • Participate in architectural discussions around search relevance, scalability, and data modeling • Support client search deployments, including environment setup, tuning, and ongoing optimization • Write clean, maintainable, and well-tested backend code • Participate in code reviews and technical design discussions