I have a great experience with java + maven (4+ years).
Currently, I am building a pipeline for AI application which involve all new cutting edge technology like Kafka, Zookeeper, Mongo, Cassandra, Elasticsearch, Kibana, Redis.
Even I have experience in spring with rest API, JPA, hibernated technology, where data flow from one microservice to another microservice. I own a lot of microservice like ApiGateway, writer service, regex building, remediation service etc. I need to handle them end to end which requires sometimes tweaks of code or some architectural knowledge.
So, I have good knowledge of databases, data structure, Programming.