Looking for a job

Oleksandr Bohachev

@oleksandrbohachev

Message

I build production RAG systems that connect FastAPI, Elasticsearch, LLMs, and Spring products.

Spain

Message

What I'm looking for

I'm looking for a remote EU role where I can build and operate production AI/RAG systems, integrate LLM workflows into real products, and work across Python services and Spring-based platforms.

At AgriChain, I own production Python/FastAPI RAG systems used by Java and Spring Boot services for enterprise knowledge search, Q&A, and recommendations.

I build hybrid Elasticsearch retrieval using BM25 and vector search, Gemini Embeddings, and Sentence Transformers. By tuning document chunking and retrieval, I achieved 88% Recall@5 across 150 labeled enterprise queries.

I integrate OpenAI, Claude, and Gemini into product workflows through structured outputs, prompt orchestration, and tool/function calling. The Python RAG layer plugs into a product platform of roughly 20 Java/Kotlin Spring Boot microservices.

I also improve backend performance and operate services on Azure with Docker, Kubernetes, and GitLab CI, using Kafka and RabbitMQ between Python and Java services.

Experience

Work history, roles, and key accomplishments

Current

Python AI Engineer / AI Backend

Current

AgriChain

Sep 2022 - Present (4 years)

Own production Python/FastAPI RAG with Elasticsearch hybrid search, achieving 88% Recall@5 on 150 enterprise queries. Integrate OpenAI, Claude, and Gemini with structured outputs and tool calling, and improve backend performance on a Spring Boot platform.