AI is a powerful technology. I make sure it delivers real value without sacrificing maintainability, reliability, or code quality.
TypeScript - advanced
Used across frontend architecture, product features, and tooling.
HTML/CSS - advanced
Built interfaces, custom WordPress themes, and frontend recruitment tasks.
React - advanced
Led frontend product work, design-system adoption, and a migration from React to Astro.
Astro and DataStar
Used together in a migration of a production frontend from React.
Solid.js - intermediate
Used to build personal projects, including Fiszki.
Polish - C2
English - C1
I know some German, Italian, and Spanish. I'm currently learning Korean
Booking App lets you book a meeting with someone. Meeting details can be customized in a separate app with many more features. Go ahead and book a meeting with me if you're interested in working with me
I was the only person building the agency homepage, and it hasn't changed almost at all since I left. I like the WebGL effect on the hero owl image and the gaps in red borders that are moving as you scroll
Flashcards app - focused on the calendar; the better it goes with a flashcard, the less often it will be shown. Actively used, but without auth, so I won't disclose the URL. Flashcards are stored in Google Sheets
Expense tracker - I designed it, created a basic backend, and started frontend but didn't have much time to develop it, so at this point, I think this project is dead
League of Legends Worlds 2019 statistics. A custom web scraper fetches data and then exports it as a JSON to generate the webpage
Docker-compose file for WordPress. It streamlined the bootstrap process for a new project and reduced compatibility issues when a developer needed to jump into someone else’s project
Dec 2025 - Sep 2026
(10 months)
Technologies:
Dec 2025 - Sep 2026 (10 months)
Developed a component library, then worked on migrating the frontend from React to Astro and DataStar alongside a C# backend. Used LLMs for planning, implementation, and problem-solving, supported by a living Markdown knowledge base of project patterns and conventions.
May 2021 - Dec 2025
(4 years 8 months)
Technologies:
Apr 2023 - Dec 2025 (2 years 9 months)
Led a team of three and helped take the Chat product from its start to its first paying customers, contributing across architecture, frontend, and product development.
Apr 2022 - Apr 2023 (1 year 1 month)
Led development of a new design system, creating a more unified product experience with over 90% adoption across products.
May 2021 - Apr 2022 (1 year)
Migrated the bundler to Vite, making live reloading 50 times faster, and moved visual testing from Percy to Chromatic, reducing testing costs by 70%.
Aug 2020 - May 2022
(1 year 10 months)
Technologies:
Aug 2020 - May 2022 (1 year 10 months)
I created over 20 recruitment tasks checking knowledge of JavaScript, React, TypeScript, CSS, HTML, Python, and Rust. My job involved developing task ideas, creating a description, correct and wrong solutions, and testing them to score appropriately. If you're using Codility, there's a good chance you saw some tasks created by me
Jul 2018 - Nov 2020
(2 years 5 months)
Technologies:
Jul 2018 - Nov 2020 (2 years 5 months)
I mainly created custom WordPress themes. I improved the process of bootstrapping and simplified sharing projects across machines using Docker. I've rewritten the Blue Owl website from scratch using Gatsby while exposing WordPress as a CMS to the admins
wachowiakf@gmail.com
+48 784 010 488