Stefan Seman

Portfolio

Projects

18 systems across generative AI, document intelligence, data engineering, and biomedical research — each one built to run in production, not to demo well.

Computer Vision Architect & technical lead

Crowd Analytics & Movement Prediction

ExpertGroup

Crowd movement prediction for a large-scale public event — forecasting where density is about to build so visitors can be routed around congestion instead of into it.

  • Congestion forecast before it forms, not reported once it already has
  • Visitors steered toward quieter routes while there is still time to act
  • Operations given lead time to open paths, move staff, and stagger entry
PythonAzure IoT HubAzure Event HubsMicrosoft FabricAzure Data LakeComputer VisionTime Series ForecastingDocker
Generative AI Team lead & delivery

Document Chatbot with Live Lineage

ExpertGroup

A high-precision multilingual chatbot over a living document set — every answer traceable to its source passage, with the index updated in real time as documents change.

  • Every answer traceable back to the exact source passage behind it
  • Document edits reflected in retrieval immediately, with no reindex cycle
  • Precision favoured over coverage — the system declines rather than guesses
PythonFastAPILangChainQdrantRabbitMQAzure AI FoundryAzure DevOpsDocker
Generative AI Team lead & delivery

Multilingual Document QA Chatbot

ExpertGroup

A retrieval-augmented assistant answering questions over a document set in the user's own language — deliberately contained in scope, led and delivered end to end by the team.

  • Questions answered directly against the documents instead of read-and-search
  • Answers grounded in the source material rather than model recall
  • Built, delivered, and deployed end to end by the team I led
PythonFastAPILangChainQdrantRabbitMQAzure AI FoundryAzure DevOpsDocker
Machine Learning

Supply Chain & Sales Forecasting

ExpertGroup

Gradient-boosted demand forecasting for wholesale distribution — product-group forecasts on a monthly planning cycle, built so planners trust the number enough to order against it.
Agentic AI

Agentic AI Insights Platform

404 Solutions · with WiserTech

An agentic application for insight synthesis — orchestration graphs coordinating multiple agents across summarization, suggestion, and meeting preparation, surfacing what matters before it is asked for.
Agentic AI

Marketing Content Manager

404 Solutions · with Q Agency

A content platform built end to end — web search and deep-research agents feeding long-form generation and blog drafting, then publishing straight out to connected channels.
Software Engineering

System Discovery & Backend Rebuild

404 Solutions · with Q Agency

Recovered what an undocumented production system actually did, specified it, and rebuilt the backend against that specification — delivered for an enterprise client through Q Agency.
Generative AI

AI-Powered Document Summarizer

404 Solutions · with Provectus

Document summarization and point-of-interest extraction across large multi-document sets, built on an agentic graph RAG architecture that holds context together where chunking normally breaks it.
Generative AI

RiskFocus — Risk Summariser

404 Solutions · with Provectus

Multi-document risk extraction that surfaces the connections between documents — where they reinforce, qualify, or contradict each other — with traceable lineage back to every source.
Cloud / AWS

Large-Scale Document ETL Pipelines

404 Solutions · with Provectus

Serverless ingestion and transformation pipelines moving documents at scale through load, parse, transform, and delivery — the substrate the summarization and risk systems run on.
Generative AI

Slingshot — AI Code Copilot

Publicis Sapient

An enterprise AI copilot taken from proof of concept through MVP to delivered product — grounded in internal code and documentation, with retrieval respecting existing access boundaries.
Generative AI

RAG Document Chatbot

Publicis Sapient

An enterprise RAG chatbot built end to end — optimized ingestion feeding retrieval over the document estate, evaluated for accuracy and consistency rather than fluency.
Data Engineering

Auto Market Data Platform

Publicis Sapient

Multi-source ingestion combining production databases and web-scraped market data into one normalized analytical layer, so downstream teams stopped re-deriving the same joins and disagreeing.
Software Engineering

Document Data Extractor Service

Valcon Netherlands

Extraction and classification services built from scratch — deep learning over unstructured text, delivered to production by a team of six I led and mentored.
Conversational AI

Voice-Enabled Support Chatbot

Valcon Netherlands

A telephone-based voice support system covering the full conversational loop — speech-to-text, intent recognition, dialogue state, and speech back — architected around availability from the start.
Software Engineering

Document Classification Service

Valcon Netherlands

Containerized microservices on Azure handling document extraction, automated categorization, and structured storage — where consistent labeling mattered as much as the manual effort saved.
Data Engineering

Data Extraction Service

Optimal Systems GmbH

An Azure extraction and transformation platform orchestrating the whole path — raw ingestion, classification, embedding generation, and self-service Power BI reporting business users could run themselves.
Research

SILICOFCM — EU Horizon 2020

BioIRC — Bioengineering R&D Center

A computational platform for in silico clinical trials of familial cardiomyopathies — ECG and CPET analysis, statistical modelling, and patient-specific 3D heart models.