# Jacek Radko

> Staff Software Engineer, open to new opportunities. A terminal-themed portfolio: resume, interactive developer tools, and a few experiments.

## Pages

- [Jacek Radko, Staff Software Engineer](https://www.jacekradko.dev/index.md): Staff Software Engineer, open to new opportunities. A terminal-themed portfolio: resume, interactive developer tools, and a few experiments.
- [Resume](https://www.jacekradko.dev/resume.md): Work history of Jacek Radko, Staff Software Engineer, previously Principal Engineer at Target.

## Developer tools

- [Base64 Encoder/Decoder](https://www.jacekradko.dev/base64.md): Encode and decode Base64 strings with this terminal-themed utility. Supports UTF-8 characters.
- [Regex Tester](https://www.jacekradko.dev/regex.md): Test and debug regular expressions with real-time matching and highlighting. Terminal-themed regex testing utility.
- [Color Converter](https://www.jacekradko.dev/colors.md): Convert colors between HEX, RGB, HSL, and HSV formats. Terminal-themed color conversion utility.
- [Diff Viewer](https://www.jacekradko.dev/diff.md): Compare two texts and see the differences highlighted. Terminal-themed text diff utility.
- [JWT Decoder](https://www.jacekradko.dev/jwt.md): Decode and inspect JSON Web Tokens. Terminal-themed JWT decoder with expiration status and claim details.
- [QR Generator](https://www.jacekradko.dev/qr.md): Generate QR codes for any URL. Terminal-themed QR code generator with downloadable outputs.
- [Markdown Renderer](https://www.jacekradko.dev/markdown-renderer.md): Drag and drop markdown files to render as webpages. Supports GitHub Flavored Markdown with syntax highlighting.
- [Bookmarklets](https://www.jacekradko.dev/bookmarklets.md): A collection of useful bookmarklets. Drag them to your bookmark bar for quick access.
- [Terminal](https://www.jacekradko.dev/terminal.md): Interactive terminal emulator with basic command support. Try help, echo, clear, and exit commands.

## Projects

- [Daily Deck](https://www.jacekradko.dev/deck.md): A live embed of Daily Deck (dailydeck.ai), a personal daily planning and organization app for focused, low-friction planning.
- [Clerk Dev](https://www.jacekradko.dev/clerkdev.md): A live demo of Clerk authentication and user management, embedded from clerkdev.app, showing sign-in, sessions, and user profiles.

## Experiments

- [Phosphor Run](https://www.jacekradko.dev/phosphor-run.md): A River Raid style phosphor-vector river shooter. Steer up an endless river, manage fuel, dodge the banks, and shoot what you can. A tribute to Carol Shaw's River Raid (Activision, 1982).
- [Phosphor Stack](https://www.jacekradko.dev/phosphor-stack.md): Phosphor-native falling-block stacker that runs on the site's CRT and re-tints with your monitor, a tribute to Tetris. A modern engine (7-bag, SRS wall kicks, hold, ghost, hard drop) across four modes: Marathon, Sprint, and Ultra each keep a global leaderboard, and Zen is an unranked palate cleanser.

## Contact

- GitHub: https://github.com/jacekradko
- LinkedIn: https://linkedin.com/in/jacek-radko