Toni Nestorowicz

Data scientist, driven by curiosity and a simple belief: anything can be improved. Right now I apply it to defect detection in manufacturing, using conventional and AI-driven computer vision to reduce production stops.

Email: my first name at nestorowicz.nlLinkedIn

Work

  1. Research intern

    –

    Leiden Institute of Advanced Computer Science, part of my MSc Health, Ageing and Society

    I am testing whether an open language model running on university hardware can reproduce a qualitative analysis of interviews with Dutch older adults about vitality, and whether it portrays them as the researcher did or reads decline where they describe adjustment.

  2. Operational Excellence Analyst

    – now

    Strohm, IJmuiden

    My work centres on defect detection in manufacturing: image acquisition and preprocessing, conventional computer vision algorithms, object detection with RF-DETR, and the tools that support them. The result outperforms what was used before and now runs in production. Along the way I set up much of the data acquisition and automation it depends on.

  3. People Analytics intern

    –

    Strohm, IJmuiden

    Alongside analysing business processes and HR data, I implemented a new HRM system.

  4. Teaching assistant

    –

    Leiden University

    I helped teach environmental data analysis with Python.

Projects

  1. TSIA

    Toni’s Simple Image Annotator, open source, built in my own time

    TSIA is a desktop app for drawing bounding boxes on images and exporting them as COCO or YOLO datasets. It runs as a single binary with no server, and almost everything works from the keyboard.

  2. nestorowicz.nl

    Two interactive figures, open source

    A century of De Bilt temperatures and eight years of my own training, each computed in the browser and reproducible from open scripts.

Education

  1. MSc Health, Ageing and Society

    2024–2027, part-time

    Leiden University Medical Center

  2. MSc Industrial Ecology

    2021–2024

    TU Delft and Leiden University

    Thesis: Improving Sustainability Communication with Generative AI

  3. Leiden Leadership Programme

    2022–2023

    Leiden University, honours programme

    The project used qualitative methods to study the challenges international students face in the Netherlands.

  4. BSc Economics and Business Economics

    2018–2021

    Utrecht University

    Thesis: Assessing Sentiments in Social Media Regarding Sustainable Eating Patterns

Languages

Polish, native. English, C1+. Dutch, B2+.