Kostya A

I build production LLM, RAG, search, and Python backend products, from data processing and retrieval to APIs, billing, and deployment.

At MVP Group, I built the backend of a multi-domain financial platform from an empty Django project. As the only backend developer on a five-person product team, I support configurable flows and external integrations across 50+ production domains that have processed 300k+ applications.

I also build applied AI products including persona-based RAG assistants, a transcription product with speaker diarization, and a grounded legal RAG assistant. My work combines Qdrant, pgvector, OpenAI embeddings, ASR, semantic and hybrid retrieval, streaming chat, and long-term memory.

Earlier, I developed CRM features for EXANTE, built smart-device emulators at ReadyForSky, and created search infrastructure that indexed about 9.5M Tor-network pages.