Senior OpenSearch / Search Engine Expert (SOLR → OpenSearch Migration)

Job Overview We are seeking a Senior OpenSearch / Search Engine Expert to lead the migration from SOLR to OpenSearch. We are looking for a consultant who understands architectural and behavioral differences between SOLR and OpenSearch, is able to manage the implications of LTR plugins and can design a scalable, stable, and high-performance OpenSearch solution in a production environment. Responsibilities • Audit and review of the current OpenSearch PoC. • Architectural advisory. • Definition and optimization of index schemas and queries. • Performance and cost optimization. • Adaptation and support of the Learning-to-Rank model. • Support of production migration. Qualifications • Expert-level knowledge of Amazon OpenSearch Service. • Strong hands-on experience with Apache SOLR. • Proven experience migrating from SOLR to OpenSearch (architecture design, cluster sizing, sharding, partitioning). • Deep expertise in: • Index mapping and schema design, • Query optimization, • Performance tuning, • Cluster scaling and cost optimization. • Production experience with: • Large-scale indexes, • High traffic environments (thousands+ RPS). • Hands-on experience with Learning-to-Rank (LTR) implementations and ranking plugins. • Strong understanding of behavioral and architectural differences between SOLR and OpenSearch, especially in the context of LTR. Nice to Have • E-commerce search experience. • Click-through optimization and relevance tuning. • Collaboration with ML teams. Benefits • Opportunity to work remotely, providing flexibility and work-life balance. • Collaborative environment promoting professional growth and development. • Flexible work arrangements supporting remote team management. • Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere. • Agile approach and no bureaucracy. • Outstanding integration trips to various places in Europe for all employees. • Activities to support your well-being and health. • Luxmed Gold Extended medical care and Multisport Plus benefit.