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Maroš Jančo

Maroš Jančo

Senior AI Engineer — production LLM, RAG and agentic systems

Summary

Senior AI engineer with 9+ years shipping production ML, NLP and LLM systems. Trained at Imperial College London (BSc Mathematics with Statistics for Finance, First Class) and UCL (MSc Machine Learning). Founder of Lexomat and Souli. A generalist who owns problems from prompt to production.

Experience

Upheal· Senior AI Engineer (Contract)

Nov 2023 – May 2026
  • Led prompt engineering, evaluation and agentic systems for AI-generated clinical progress notes.
  • Owned quality across 100+ production releases; built an LLM-as-judge eval framework on Langfuse.
  • Productionised RAG, prompt orchestration and agentic patterns across Gemini, Claude, GPT-* and Llama; benchmarked Vertex AI, Bedrock, Azure OpenAI and Anthropic for quality, latency and cost.
  • Reported AI roadmap and cost trade-offs directly to founders.

Cervest· Senior Data Scientist

Jul 2021 – Jul 2023
  • Built from scratch the first physical-climate-impact platform assessing combined-hazard damages worldwide.
  • Led a global wildfire-damage prediction product end-to-end; shipped a financial-impact model for adverse climate events.
  • Optimised distributed pipelines over TBs of geospatial, satellite and financial data.

BNP Paribas· Machine Learning Researcher

Jun 2017 – Jun 2021
  • Built and deployed NLP models for a global investment bank's AI lab.
  • Built a history-augmented collaborative-filtering recommender saving thousands of clients hours of document search.
  • Designed an NLP entity-extraction system later scaled with LSTM/BERT; a dozen+ NER models automate chat-to-price FX execution daily.

Lexomat (Founder)· Founder

2024 – Present
  • Solo-founded AI legal-research chat for Slovak and Czech law, indexing millions of legal documents.
  • Drove product, design, agentic AI flows, GDPR compliance, pricing and infrastructure end-to-end.
  • Built a citation-resolution layer and backend-resolved URL architecture to eliminate LLM URL hallucination.

Education

  • UCL — MSc Machine Learning
  • Imperial College London — BSc Mathematics with Statistics for Finance (First Class)

Selected stack

Python · TypeScript · PyTorch · Langfuse · Vertex AI · Bedrock · Anthropic API · FastAPI · Next.js · Supabase · PySpark · Databricks · Kubernetes

Contact: maros@marosjanco.com