Head of Engineering @krone.at • Open Source Contributor
95+ merged contributions across Chromium, PDFium, and jxl-rs. From Tab Focus to JPEG XL revival, and working towards the browser trinity.
Exposing getNegotiatedMTU() to break past the 20-byte wall across Windows, Linux, Android, macOS.
Bringing <input type=file capture> to Windows, Mac, and Linux. Closing a 12-year-old feature gap.
Implementing loading="lazy" for media elements. Cross-browser collaboration with Squarespace.
Invest in tooling once, reap the benefits forever. ~2,000 Chromium cleanups from a few checks.
disconnect() now aborts an in-flight connect on Windows and Android - a journey that reached down into AOSP.
Long-press drag now works on Linux instead of popping the context menu, matching Windows. Enabled by default.
Installed fullscreen PWAs on Android now draw under the notch via short-edges cutout mode. Available in Canary.
Pages restored from BFCache now come back with the same element focused - with the IME state kept in sync.
Three CLs against one moving target: keyboard insets, innerHeight overshoot and undershoot during animations.
USB ID database and libphonenumber metadata: compressed, lazily loaded, and finally enabled on Android.
The selector tooltip now shows which parts of a selector contribute to each specificity component, computed by Blink itself.
Adding a new WindowOpenDisposition through Blink, content and chrome - including the renderer-kill bug along the way.
A fetch API attribute for service workers, from implementation through Intent to Ship to enabled-by-default.
Pseudonymization salt via shared memory. When the bug report is older than some interns.
Adding text filtering to Chrome's Speculation Rules panel after real-world testing at krone.at.
From "obsolete" in 2022 to welcomed back in 2025. Rust implementation within 4% of C++ performance.
A tweet from Tobi Lütke led to --focus flag. Focus existing tabs instead of creating duplicates.
DHH needed CLI theming for Omarchy Linux. CLI switches for Material Design themes in record time.
Chrome crashing on multi-monitor Wayland. Bug report to upstream fix in 72 hours.
Turning a patched dev build into a distributable .deb/.rpm, universal .app, or mini_installer.
Terminal-first coding agent. Multi-model switching, session trees, extensible hooks.
Experimental JXL-in-PDF decoding using jxl-rs. Alpha via synthesized /SMask, animation → frame 0.
Deep dive into DPB management: fixing GPU crashes for WebRTC video calls. Work stopped; see the tracking bug.
Pursuing RFC 9460 support in Chrome. Rejected in favor of the team's ongoing network-stack refactor.
I work as Head of Engineering at krone.at, focusing on engineering management, technical strategy, and system reliability. My background spans 25+ years across various technology domains.
I contribute to open source projects including Chromium, LLVM, PDFium, and Fastlane. Areas of interest include system performance, developer tooling, and infrastructure automation.
Leading technical vision and engineering teams at scale. Experience building and maintaining systems that serve millions of users.
25+ years across the full technology stack - from low-level system programming to distributed cloud architectures.
Active contributor to major projects. Building tools that make developers more productive.
Founded and leading Captcha.eu - a GDPR-compliant bot protection service hosted in Austria. Serves clients including ÖBB, Bauer Media Group, and E.ON with privacy-first, accessible web security solutions.
Chromium Committer. Key contributions include reviving JPEG XL support with a Rust decoder, the --focus flag for tab reuse, dynamic theming for Omarchy, and fixing long-standing bugs in tracing, DevTools, and media encoding.
Enhanced clang-tidy modernization tools by implementing pattern detection for substr() operations that can be replaced with C++20 starts_with() method, improving code readability and performance.
Key contributor to iOS and Android deployment automation tool. Enhanced Spaceship module for App Store Connect integration, improved terminal responsiveness, and fixed critical build system compatibility issues.
Contributed to PHP's dependency manager. Implemented GitLab API v4 pagination support for repository discovery and improved tag/branch collection functionality for better package resolution.
Browser-based terminal multiplexer for frictionless remote access to macOS terminals. Designed for "vibe coding" - maintaining developer flow from anywhere. Core contributor to this innovative tool for monitoring AI agents and remote development.
When DHH called out for help with live theming in Chromium for his Omarchy Linux distribution, I answered the challenge. Now maintaining a micro fork that enables dynamic theme switching without browser restart. Working to upstream this patch while providing the feature to the Omarchy community through an AUR package.
I'm always interested in discussing new projects, opportunities, or just chatting about technology.