Maciej J.

Principal AI Engineer | Building Production RAG & LLM Systems | Python, LangGraph, PydanticAI, FastAPI

Poland

About

I ship AI products to production — RAG systems, AI agents, LLM integrations. 8 years Python, 3 years building with LLMs. Available for consulting and contract work. studiochrome.ai

Experience

  • Principal AI Engineer at Teamwork.com
    Sep 2025 - Apr 2026 · 8 mos

  • Senior AI Engineer at Roche
    Mar 2025 - Apr 2026 · 1 yr 2 mos

  • Senior Backend Engineer at Universal Music Group
    Apr 2025 - Jun 2025 · 3 mos

  • Senior Backend Engineer at Cognition Factory GmbH
    Sep 2024 - Feb 2025 · 6 mos

    - Modernized Django project with async features, improving response times - Optimized endpoints reducing latency - Enhanced CI/CD pipelines cutting build times - Led codebase improvements using modern Python and Django practices

  • Backend Software Engineer at Gcore
    Dec 2022 - Sep 2024 · 1 yr 10 mos

    - Created unified logging package for Django/FastAPI applications - Built FastAPI statistics endpoints for client dashboard metrics - Developed REST API exposing ML models for content moderation - Set up Grafana monitoring for system health tracking - Guided team onboarding and product integration planning