AI Backend Engineer · Python · FastAPI · RAG · LLM Agents · PostgreSQL · Kafka

I'm a Python Backend Developer / AI Backend Engineer with 4+ years of commercial experience in backend development, automation, and reliability engineering.

I build production-oriented backend services and AI-powered systems with Python, FastAPI, PostgreSQL, Redis, Kafka, gRPC, Docker, and async Python.

My current focus is AI backend engineering:

• RAG pipelines and semantic search
• Local LLM tooling with Ollama
• Vector databases and embeddings
• LLM agents and document generation workflows
• Clean Architecture for AI services
• Event-driven backend systems and reliable async processing

I like building systems where AI features are not just demos, but properly structured backend services with clear boundaries, persistence, observability, and failure handling.

Local AI backend service for API documentation generation and semantic search.

Built with FastAPI, Ollama, Qdrant, CrewAI, LangChain, Docker Compose, and layered architecture.

Key features:

• RAG pipeline over Markdown documentation
• Semantic search with Qdrant
• Local LLM and embeddings through Ollama
• Agent-based documentation generation and validation
• Clean Architecture structure: domain, application, infrastructure, presentation
• API endpoints for generation, search, and health checks

Repository: https://github.com/mrKazzila/ai-docs-assistant

Production-oriented URL shortener focused on event-driven architecture and reliability.

Built with gRPC/protobuf, PostgreSQL, Redis, Kafka/FastStream, SQLAlchemy async, Alembic, Dishka, Docker Compose, and observability tooling.

Key features:

• gRPC API for service-to-service communication
• Immediate response path through Redis
• Kafka-based async persistence pipeline
• Transactional inbox and deduplication for idempotent writes
• Clean Architecture, repositories, unit of work, and DI
• Docker Compose local environment

Repository: https://github.com/mrKazzila/shortener_url_api

Python · FastAPI · gRPC · PostgreSQL · Redis · Kafka · SQLAlchemy · Alembic · Docker · pytest · asyncio

RAG · LLM Agents · Qdrant · Ollama · LangChain · CrewAI · Embeddings · Semantic Search

Clean Architecture · Event-Driven Architecture · Transactional Inbox · Deduplication · Unit of Work · Observability · Linux

• LinkedIn: https://www.linkedin.com/in/i-kazakov/
• Email: kazzilacareer@gmail.com
• Telegram: https://t.me/mrKazzila