Tom Schuster - Senior Software Engineer at Mozilla

Tom Schuster

Senior Software Engineer at Mozilla

Darmstadt, Hesse, Germany

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Summary

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Rockstar

🎓

Top School

Tom Schuster is a Senior Software Engineer with 16 years of experience, currently at Mozilla in Darmstadt, Germany, blending deep systems and browser expertise with a strong Rust backend background. He has contributed to high-profile open-source projects like Firefox (gecko-dev) and the Ruffle Flash emulator, implementing complex AVM2/XML features and performance-sensitive browser internals. His work spans full-stack development, test automation, and JIT compiler pieces for RustPython, showing both attention to user-facing UX details and low-level engine behavior. Comfortable navigating large codebases and cross-team collaboration, he also brings practical QA and automation experience from Adblock Plus and web-platform-tests. Colleagues would note his knack for turning obscure spec edge cases—especially around XML, namespaces, and streams—into reliable, test-covered implementations.

16 years of coding experience

8 years of employment as a software developer

Technischen Universität Darmstadt

Gewerblich-technische Schulen Offenbach

English, German

Github Skills (47)

web-testing10

javascript10

testing10

css10

user-interface10

browser-support10

firefox10

web-standards10

bytecode10

browser-testing10

xml-parsing10

compile10

html10

xml10

compiler10

Programming languages (22)

JavaC++BikeshedRustCWebAssemblyGoHTML

Github contributions (5)

mozilla/gecko-dev

Jun 2013 - Jan 2023

Read-only Git mirror of the Mercurial gecko repositories at https://hg.mozilla.org. How to contribute: https://firefox-source-docs.mozilla.org/contributing/contribution_quickref.html

Role in this project:

Full-stack Developer

Contributions:1023 commits in 9 years 8 months

Contributions summary:Tom contributed to multiple areas of the Firefox source code. They implemented videoJS wrappers for Arte PiP captions, removed a preference related to streams, and added a "Tabs from other devices" item to the tab manager, enhancing user experience. They also added functionality related to ReadableStreamBYOBReader.prototype.read(view, { min }) and inlined wasm:js-string length, indicating work on core browser features and performance optimization.

repositoriesfirefoxmercurialgit-mirrormozilla

ruffle-rs/ruffle

Nov 2020 - Mar 2025

A Flash Player emulator written in Rust

Role in this project:

Back-end Developer

Contributions:358 reviews, 253 PRs, 102 pushes in 4 years 4 months

Contributions summary:Tom primarily focused on implementing and improving XML-related features for the Ruffle emulator, specifically related to ActionScript 3 (AVM2) functionality. Their contributions involved implementing the `child` and `elements` methods for XML and XMLList objects, including handling attributes and wildcards. They also worked on improving the `toString` method and addressing issues related to namespace handling, demonstrating a strong understanding of the ActionScript 3 XML specification. Further contributions include implementing the implementation of a new `text` method, and support for the `setChildren` property for elements and XMLList.

playeremulatorrustflashreimplementation

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