Ik work on an internal project to develop a new version of the company portal. This includes the following activities:- Implementing new features and maintaining existing ones, both back- and frontend. (Python/SQLAlchemy/FastAPI/React)- Improving the development processes, including introducing unittests, end-to-end tests, CI pipeline and code reviews. (Pytest/Cypress/GitHub actions)- Optimising the deploy process, including using pre-build optimised Docker images (Docker/Skaffold/Kubernetes)

After having made the switch to freelance software engineer, I've stayed for one day a week at Abel, to work on the following:- Transferring knowledge and onboarding of new colleagues- Giving advice and collaborating on system designs for new features based on my past experience.- Making and executing a plan to get rid of an old Python version.

I maintain a full-stack web application with a back-end written in PHP 8 with Laravel and a front-end which still uses Bootstrap/JQuery for the older parts of the code and VueJS/TailwindCSS for the newer parts. The application runs on a CentOS VPS, which I installed and configured. For the database we are transitioning from MySQL to PostgreSQL.Stack:- PHP 8/Laravel- VueJS/TailwindCSS- Blade templates with Bootstrap/JQuery- MySQL/PostgreSQL- GraphQL and REST APIsI also developed Python tooling and applications for monitoring parked vehicles in parking facilities.Stack:- Python (between 3.5 and 3.11)- OpenCV for image processing- Tensorflow for training machine learning modelsFor these software projects I maintain the CI/CD pipelines, which run on Jenkins and Buildkite. We use Docker containers to isolate the environment and run the builds on our own infrastructure.Next to being a developer, responsibilities include: coordinating team work, reviewing code, facilitating discussions about software architecture and technical decisions, mentoring juniors, evaluating team skillset and capacity, first point of contact for the operational department.

Part of the development team, software engineer for the data platform (PHP/Laravel/JS), the SmartParking applications (Python/Machine learning) and the embedded software (C). DevOps engineer for the data plaform (Linux/Docker/Apache/MySQL/Redis) Also involved in supporting other departments.

For this internship I wrote machine learning training pipeline and evaluation tooling using Python and Tensorflow/Keras. The time-series data had to be converted from a vendor-specific file format for multichannel-ECG traces and Excel files with annotations. I wrote the tooling to convert it the data to a format that could easily be read by Numpy.The goal of the machine learning model was to predict seizures based on ECG measurements, by letting the model detect precursors in the data that are not clearly visible using data processing algorithms or classic machine learning techniques.Tech stack:- Python- TensorFlow/Keras- Numpy

I analysed and repaired defective PCBs on-site and worked as a software developer remotely. I developed a web-based app for finding charging stations. The app was written using ionic, so using basic HTML and Javascript. Next to that I worked on embedded firmware written in C and wrote a small library for SIM card management in PHP.

I designed PCBs for charging stations, including a LED ring as status indicator and a controller for a charging station for bikes. I also wrote firmware for these and other products using C.

I developed a small sized prototype of a wheelchair which can avoid bumping into objects and can navigate around them. The idea is that someone who's not able to drive a normal electrical wheelchair because of motoric dysfunctions can still control this one that helps finding the way.First prototype of the firmware was written in Labview (graphical programming language) and later versions in C++ using Arduino libraries. The used hardware was a robotic development kit.

I implemented several features for art installations of Studio Roosegaarde. All of them were written in C.- I wrote a DMX controller to integrate off-the-shelf studio lighting into an art installation. This was done by using the UART peripheral of a microcontroller.- I wrote a bootloader which supports receiving the new firmware binary over a RS485 connection. Since RS485 is a bus connection it was possible to update multiple devices on the bus at once.- I wrote a library for interfacing with a GPRS/EDGE modem, which could be used for remote control of an art installation.

During this 'Summer of Code' job I developing a plugin for Hudson (CI/CD system) using Java.