Hello,
I would like to know more about your project. At Adelean, we are auditing, developing and improving search projects since 2010. 90% of our projects are around Lucene, Elasticsearch and Solr. As the CTO, I am the Solr referent within the company.
If you just need improvements on an existing Solr implementation, this could be done pretty fast from our point of view. Our auditing missions generally solve problems within one or two days (16 hours), four to five days if a prototype is needed (when starting from scratch).
Best regards,
Lucian Precup