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preslaff/README.md

Preslav Penev

AI Engineer & Researcher · LLM systems · Speech & generative media · Resilient geospatial platforms

aidentit.com · LinkedIn · Email

I research how AI models behave and build systems that hold up in production, from Bulgarian speech recognition and agentic RAG platforms to generative media pipelines. My background is in data science, ML research and business analysis.

Selected Work

Generative Media

  • vorch (proprietary): the pipeline behind our AI ad production, covering product stills, video ads and narrated spots, with model self-evaluation.
  • TrainGen: narrated, bilingual training videos generated from a live product UI.

Speech AI

  • Bulgarian ASR: speech recognition model trained from scratch on 2,200+ h of Bulgarian; 3.93% WER on unseen parliament sessions, plus a streaming version (~640 ms latency) that holds up on phone-line audio. Demo
  • Bulgarian TTS: Bulgarian layer for the open-source OmniVoice TTS, with native accent, correct lexical stress and a cloned narrator voice; it voices vorch and TrainGen.
  • Voice AI Receptionist: Bulgarian-speaking voice agent that takes calls and books appointments.

Agentic Systems & RAG

  • Tourism AI Platform (private): LangGraph agents, RAG and PostGIS routing for travel in Bulgaria. Live
  • AI Code Reviewer: multi-agent pull-request review integrated with GitHub Actions.

Resilient Sensing & Geospatial

  • STOZHER (prototype): GNSS jamming and spoofing detection with signed reports over satellite, LoRa mesh or any network. Built at the 12th CASSINI Hackathon.

Business Automation

  • PaperlessAI: invoice extraction from PDFs and scans into structured accounting data. Demo
  • Compliance Hub (private): AI-assisted ISO 45001 compliance management. Demo
  • Toy Recognition (private): CLIP and FAISS product identification at the point of sale. Demo · Notebook

Education

  • DS-Tutor: interactive data-science tutor.
  • SQL-Tutor: adaptive SQL tutor with semantic answer scoring.

Core Stack

Python · LLMs (Claude, OpenAI, Gemini, open-weight) · LangGraph · RAG & vector search · PyTorch · icefall / k2 · ComfyUI · FastAPI · PostgreSQL / PostGIS · React / Next.js

Pinned Loading

  1. sql-tutor sql-tutor Public

    AI-Powered Interactive SQL Tutorial System with adaptive tutoring, semantic similarity scoring, and unlimited AI-generated exercises

    Python 1

  2. price-checker-app price-checker-app Public

    Your smart companion for instantly verifying dual-currency price tags using your smartphone's camera. This application solves a common problem for consumers in Bulgaria by checking if the price in …

    HTML

  3. SQAM SQAM Public

    SQAM - Simplified Question Answering Machine is a non-LLM solution for question answering

    Python

  4. ai-code-reviewer ai-code-reviewer Public

    A complete AI-powered GitHub and Gitlab pull request reviewer agent using LangGraph and OpenAI.

    Python

  5. dstutor dstutor Public

    DS-Tutor: AI-powered Data Science education platform with interactive Jupyter lessons covering Python, NumPy, Pandas, Matplotlib, and Scikit-Learn

    Python

  6. satellite-mission-control-simulation-system satellite-mission-control-simulation-system Public

    SMCSS - A comprehensive satellite mission control application with ML-powered trajectory prediction and course correction capabilities. Features real-time satellite tracking, multiple coordinate sy…

    Jupyter Notebook 1