I'm Karol Działowski

Also known as karlosos, Full Stack Developer and Computer Vision enthusiast.
I value hard-earned domain knowledge, a deep understanding of technology and the ability to work well with others.

My resume GitHub Get in Touch

My skills

Web Development

Computer Vision

Knowledge Sharing

My projects

Kindle Clippings Manager

Kindle Clippings Manager written in React and using React Redux

Import, browse and delete kindle quotes.

PitchMap

Tracking football players on the playfield captured by a moving camera

Todoist Clone

Todoist clone written in React and using React Context based on tutorial.

Backend created with Django Rest Framework from scratch without tutorial.

Smarthome WebApp

Smarthome web application written in React and Fastify.

Created during Intive Patronage.

Url to BibTeX

Simple application to generate BibTeX entry from given url.

Created using React and CORS-anywhere server hosted on Heroku.

See more projects on GitHub

https://github.com/karlosos

Recent blog posts

Implementing hold to confirm button in React

This blog post delves into the creation of a "hold to confirm" button using vanilla React, addressing its potential advantages and drawbacks. It highlights concerns related to user familiarity, accessibility challenges, and suggests considering alternative UX patterns.

#react #ui #ux

2023-06-25・4 min read

My 14 Days Long Story About Upgrading React

My review of React upgrade journey in my project. Explored problems with React.FC, userEvent, Redux types and massive number of almost one thousand failing tests to fix.

#react

2023-02-25・5 min read

Code reviews taking too long? Here are 7 ideas for preventing PRs from getting stuck

In this blog post, I'll explore 7 ways to prevent code reviews from getting stuck and speed up the process, including limiting work in progress, making pull requests easy to review, and effective communication with reviewers.

#code-review

2022-12-08・7 min read

Running old Ruby on Rails application with Docker

Post explaining how I've managed to run old (5+ years old) web application with Docker without much hassle.

#docker #ruby-on-rails

2022-08-04・5 min read

Automatically Restarting Heroku App With Cronjob

In this blog post, I describe the solution for automatically restarting the Heroku application. Restarting is done with the use of Heroku API and the dedicated NodeJS script. However, this problem can be also solved without writing any line of code.

#heroku #cloud

2021-10-20・2 min read

Football Data Visualizations - Passing Networks

During Euro 2020 I've seen a lot of good-looking visualizations on Twitter (see those created by Maram AlBaharna and Matteo Pilotto. There's also plenty of other data scientist, some professional and some amateur, who create soccer data visualizations.

#python #data-science #football

2021-09-14・7 min read