Marcin Krzyżanowski

Marcin Krzyżanowski

I'm a software engineer specializing in iOS development, recognized for my contributions to open-source projects. Notably I created CryptoSwift, a Swift library for cryptographic operations, or ObjectivePGP, an iOS/macOS open-source library for secure OpenPGP encryption and digital signature, or Online Swift Playground, and SwiftStudio. Recently, I did a deep dive into TextKit with the STTextView component, which is a reusable and extensible text view built from scratch. Another tool is VMDesktop which is a Linux Virtual Machine launcher for macOS. Notepad.exe is a lightweight IDE for Mac that lets you write and run Swift, Python, and JavaScript code instantly—no project setup required, with integrated iOS Simulator support and a Smart Notes Library. Commander is a native macOS app for AI-powered coding with Claude Code and Codex CLI, featuring integrated git workflow and worktree support. My passion for programming and software design drives me to continuously explore new technologies and contribute to the advancement of the software engineering field. My work in the tech community has involved not only developing innovative tools but also sharing knowledge through speaking engagements at technology conferences and active participation in software development forums.

You can find me on X (Twitter), and Instagram or Mastodon, Bluesky. I occasionally blog too. Feel free to email me at [email protected]. You can see my code on GitHub and my résumé if you want 🤓

Public speaking

Podcast appearances