Built RAG-based AI search for my EdTech platform DevLearn. Users ask questions in natural language and get answers with interactive visual widgets from the lessons.
Stack: Kotlin + Spring Boot + Spring AI + PostgreSQL + pgvector + Ollama — fully self-hosted, no external APIs.
Key challenge: small LLMs (3B) hallucinate JSON schemas, so widget data is fetched directly from the DB instead.
https://cresoftlab.online
#java #kotlin #ai #rag #llm #pgvector #ollama













