Dragutin Oreški

AI Engineer

I create AI systems driven by data.

Lately, I've been into:

Leveraging the latest Context Engineering trends via LangGraph
Optimizing self-hosted Llama models inference through speculative decoding and caching.

Dec 2024 –

QED Code
Lead AI Engineer

Building robust, privacy-focused AI platforms for government clients using RAG and multi-agent systems.

• Designed a LangGraph multi-agent system for generating project breakdowns from private customer documents.
• Developed a private RAG platform for secure document chat and agentic workflows.
• Optimized self-hosting of Llama models for high performance and cost efficiency.
• Implemented Langfuse for observability and DeepEval for evaluation.
Mar 2024 – Dec 2024

Freelancer
AI Engineer (Top 3% Upwork)

Built custom RAG and multi-agent systems

• Built AI chatbots:
• Storyteller: AI-generated personalized children’s stories • Chat with Nikola: – Interactive Nikola Tesla chatbot • AI Therapist: – Chatbot delivering CBT-driven anxiety support • Designed AI-based product matching system
• Developed a simulation engine that allows game providers to test and optimize betting game parameters through outcome forecasting.
• Designed and deployed conversational AI solutions using Dialogflow.
• Built a scalable video creation tool for generating custom videos and automating large-scale greenscreen overlays.
Sep 2023 – Mar 2024

Upp Agency
Co-founder

Co-founded an agency focused on AI & Data Engineering

• Led a team of 5 engineers in maintaining and improving data pipelines and dashboards.
• Designed and migrated infrastructure to dbt, Snowflake, Prefect, and Kubernetes.
Aug 2017 – Sep 2023

CIAL Dun & Bradstreet
Data Engineer / Scientist

Designed distributed ELT pipelines and NLP solutions for Latin-American markets.

• Developed automated data processing pipelines and analytics for business use cases.
• Implemented NLP-based entity and company matching solutions.
• Mentored new hires and established team processes.