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Michał Raczkowski

Michał
Raczkowski

Software and embedded engineer

I design the circuit board, write the firmware, build the backend it talks to, and keep the whole thing running in production.

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Based in the Warsaw area, Poland

  1. Hardware

    Microcontroller selection, PCB design in KiCad, assembly and soldering

  2. Firmware

    Zephyr RTOS on nRF52833, ESP-IDF, UART, SPI, I2C

  3. Backend

    REST APIs, MQTT, PostgreSQL, Python, PHP, Rust

  4. Production

    Docker, Caddy, GitHub Actions, incident handling, field tests

The layers of a connected product, from the device up. I've shipped work at every one of them.

About

Portrait of Michał Raczkowski

I spent the last two years in Eindhoven at Alltrons, where I helped take a commercial IoT product from prototype to market release. That meant picking microcontrollers and designing PCBs, writing Zephyr firmware for nRF52833 boards, building the REST APIs and MQTT plumbing behind them, and then running staging and production, including field tests at the client's site.

I graduated in ICT & Software Engineering from Fontys University of Applied Sciences, specialising in software engineering and AI. Along the way I built a code-generation tool at ASML and fine-tuned a language model for BDO's internal chatbot.

Work

2024 – 2026

Intelligent outerwear management system

A commercial IoT product I helped take from prototype to market release at Alltrons, from the circuit boards up to the production servers.

nRF52833, Zephyr RTOS, ESP-IDF, KiCad, REST APIs, MQTT, PostgreSQL, Docker, Caddy

Read about the project

  • 3D-printed prosthetic arm

    An electro-mechanical arm based on the open-source InMoov project, which I designed, built and debugged for a high-school teacher. It ended up on national radio and TV.

    InMoov, 3D printing, electronics, mechanical design

  • Programmable LED earrings

    2021 – present

    Tiny wearable boards with hand-soldered 0603 LEDs, running on an ATmega328P. My longest-running side project.

    ATmega328P, KiCad, Eagle, PCB design, soldering

  • Intent classification for BDO's internal chatbot

    2025

    A university project for the consulting firm BDO. We fine-tuned a small T5 model to tell questions, summaries and translation requests apart.

    T5, synthetic data, Databricks, Azure Machine Learning

  • Student guide app for Kozminski University

    Aug – Nov 2024

    A progressive web app that helps international students settle into life in Poland, with offline search. A freelance project I ran end to end.

    React, PWA, IndexedDB

  • Solar price calculator for Enzeit

    2024

    A website that gives a preliminary sale price for different solar modules, with the calculation written in Rust and compiled to WebAssembly.

    Rust, WebAssembly, JavaScript

  • Tamagotchi in the browser

    2022

    A small game about looking after a digital pet, drawn on an HTML canvas.

    JavaScript, HTML canvas

Experience

  1. Aug 2024 – Apr 2026, Eindhoven, the Netherlands

    Alltrons, Software Engineer

    • Took a commercial IoT product through market release, working across hardware, firmware, backend, frontend and deployment.
    • Selected microcontrollers, designed PCBs, and programmed nRF52833 devices on Zephyr RTOS; built further embedded components with ESP-IDF.
    • Built REST APIs for authentication, device onboarding and initialisation, worked with MQTT in an event-driven architecture, and maintained PostgreSQL-backed Symfony and Laravel systems.
    • Ran development, staging and production environments with Docker, Docker Compose and Caddy, handled production incidents, and tested the system on site with the client.

  2. Oct 2024 – Jan 2025, Veldhoven, the Netherlands

    ASML, Software Engineering Intern (university placement)

    • Built a Python and Jinja code-generation tool that automates plugin creation for internal ASML software.
    • Worked on site with a university team inside ASML's secure development environment.

  3. Jun – Aug 2021, Warsaw, Poland

    Monkeyfab, Junior 3D Printing Hardware Engineer

    • Assembled and maintained FDM 3D printers, soldered custom hardware components, and designed parts in Fusion 360.
    • Printed prototypes and production series and handled their quality control.

Skills

Embedded and firmware
C, Zephyr RTOS, Nordic nRF52833 and nRF family, ESP-IDF, AVR/Arduino, UART, SPI, I2C
Electronics and CAD
KiCad, Eagle, PCB assembly and soldering, Onshape, Fusion 360, SOLIDWORKS
Backend and data
Python, Flask, PHP (Symfony, Laravel), Rust, REST APIs, MQTT, PostgreSQL, SQLite
Web
TypeScript, React, progressive web apps, WebAssembly, C# and .NET
Infrastructure
Linux, Bash, Docker, Docker Compose, Caddy, GitHub Actions, GitLab CI, Google Cloud, Azure, Kubernetes
AI and ML
Hugging Face, T5, RoBERTa, LangChain, Ollama, Databricks, Azure Machine Learning

Education

Fontys University of Applied Sciences

BSc ICT & Software Engineering, Feb 2021 – Apr 2026

Specialisations in software engineering and AI

Certifications

  • IELTS English certificate
  • Certified SOLIDWORKS Associate, Mechanical Design (2021)

Languages

  • Polish, native
  • English, C2
  • German, A1

Contact

I'm looking for my next role in embedded, IoT or backend engineering. Email is the quickest way to reach me.

michal.raczkowski.pr@gmail.com