AI Agent Engineer from Lithuania, based in Rio de Janeiro 🇧🇷

I build production AI systems — agents that reason, retrieve, and act. My focus is on making LLM-powered applications fast, reliable, and deployable.

• AI Agents — multi-step autonomous agents using LangGraph, CrewAI, OpenAI Assistants API, and custom orchestration
• RAG Systems — production-grade retrieval pipelines with Milvus, LlamaIndex, LangChain, and hybrid search strategies
• LLM Fine-Tuning — domain-adapted models for healthcare, defense, and enterprise use cases
• Voice AI — conversational voice agents with Hume AI, Telnyx, and real-time STT/TTS pipelines
• High-performance APIs — sub-second RAG in Rust/Actix-web, async Python with FastAPI

Languages: Python · Rust · TypeScript

AI/ML: OpenAI API · Claude API · LangGraph · LlamaIndex · LangChain · CrewAI · OpenRouter · Tavily

Models: GPT-5.2 · Claude Sonnet/Opus · Gemini · Hugging Face

Infra: FastAPI · Actix-web · Docker · NGINX · Linux

Data: PostgreSQL · Milvus · Redis

Cloud: AWS · Azure

📫 1gnas@pm.me
🔗 linkedin.com/in/ignas-vaitukaitis