Siarhei Thor
AI/ML Engineer | Applied ML, LLM Systems & AI Product Infrastructure
Zurich, Switzerland | (+41) 78 217 35 65 | siarheithor@gmail.com
Last updated: October 26, 2026
Profile
AI/ML Engineer experienced in owning the full lifecycle of production AI systems, from data preparation, feature engineering, model training, evaluation, and calibration through API development, deployment, monitoring, and automated retraining. Builds predictive ML services, agentic LLM applications, and backend infrastructure that turn complex real-world data into reliable internal tools and user-facing products. Brings hands-on engineering and product thinking, plus seven years as an architect (MSc, TU Delft) leading complex multidisciplinary projects with computational and generative design.
Experience
AI/ML Engineer
May 2024 - Present
- Developed end-to-end ML services for running and cycling analytics, spanning data preparation, model training, evaluation, calibration, deployment, monitoring, and automated retraining workflows.
- Designed feature engineering and data-quality workflows for time-series data from sports wearables, including preprocessing, bad data detection and handling, and support for incomplete activity data.
- Built an AI-assisted pipeline for collecting, enriching, and maintaining 5,000+ structured RaceDB records, replacing a part-time manual scraping and data-maintenance workflow.
- Designed AI-assisted training-planning and personalized feedback systems combining LLMs, sports analytics, structured knowledge, and custom training-load metrics.
- Developed AI coding-assistant workflows for repository maintenance, tool orchestration, sandboxed execution, reusable agent skills, and knowledge graph-supported project knowledge bases.
Data Scientist / AI Engineer
Sep 2023 - Apr 2024 Jun 2025 - Sep 2025, project-based
- Built conversational analytics products on top of survey datasets, including chat-based insight workflows that translate structured data into natural-language answers.
- Developed a multi-agent survey intelligence prototype combining semantic retrieval, SQL-based analysis, statistical guardrails, and user-facing chat interfaces.
- Built preprocessing, vector-store, API, and interactive-analysis pipelines using FastAPI, DuckDB, pandas, SciPy, and FAISS.
AI Strategy and Digitalization Consultant
Sep 2021 - Aug 2023
- Built a GPT-powered regulatory assistant for architects, answering building-regulation questions with retrieval-augmented generation (RAG).
- Built a Stable Diffusion / ControlNet workflow for controlled architectural design exploration.
- Advised architecture and real-estate clients on AI adoption, translating domain problems into practical workflows, MVP concepts, and digital tools for sustainability-focused planning analysis.
Senior Architect / Computational Design
Jan 2015 - Oct 2021
- Project architect and creative lead on competition-winning, large-scale developments, including Forriver, Moscow (260,000 m² residential) and urban structure plans up to 100 ha (Semrén & Månsson).
- Developed masterplans with generative and data-driven design methods, evaluating daylight, noise, views, and outdoor comfort across design options.
- Shared lead responsibility for parametric design on Kalverpassage, a large, high-profile project in central Amsterdam (CIE); architect and BIM manager on Baoshan Industrial Park, Shanghai (150,000 m², Sweco).
- Used programming and parametric design tools (Grasshopper, Dynamo, Rhino.Inside.Revit) to automate repetitive workflows, set up BIM models, and support complex design coordination.
- Managed multidisciplinary teams across international consultants and clients, and developed training material for junior architects in computational design.
Technical Skills
Programming Languages
Python, SQL
ML, AI & Modeling Frameworks
scikit-learn, XGBoost, TensorFlow, PydanticAI, Pydantic, OpenAI-compatible APIs
Data & Analytics Libraries
pandas, NumPy, SciPy, DuckDB, FAISS, PyArrow, Optuna, Plotly
Application & Data Systems
FastAPI, SQLAlchemy, PostgreSQL, MySQL, Redis, WebSockets, Alembic
Infrastructure, Observability & Tooling
Docker, Gunicorn/Uvicorn, OpenTelemetry, Langfuse, Sentry, pytest, Git, Linux, GCP
AEC & Computational Design
Rhino + Grasshopper, Revit + Dynamo, Rhino.Inside.Revit, BIM coordination
Education & Training
MSc, Architectural Engineering — Delft University of Technology, The Netherlands
September 2009 - June 2014 | Honours Programme 2010 - 2014
Data Science Program — EC Education, Stockholm / Online
August 2023 - June 2024
Additional
Languages: Russian: native; English, Dutch, Swedish, and Belarusian: fluent.
Interests: Orienteering, trail running, cycling, photography.