Stefan Haustein
SWE at Google
Zurich, Zurich, Switzerland
Summary
🤩
Rockstar🎓
Top SchoolStefan Haustein is a seasoned software engineer with 15 years of experience, currently building systems at Google from his base in Zurich. He combines deep technical roots—backed by doctoral-level computer science training—with hands-on engineering across C++, Java, and mobile platforms. Stefan contributes to open source tooling that improves developer and user experiences, notably enhancing a terminal image viewer and Android emoji support to broaden compatibility and usability. His work shows a pattern of practical refinements: adding robust input handling, richer character rendering, and cross-platform drawable-based emoji rendering rather than fragile resource IDs. Colleagues would describe him as a pragmatic problem-solver who elevates small utilities into reliably usable components. He brings academic rigor to production engineering, often focusing on subtle UX and interoperability improvements that pay dividends at scale.
15 years of coding experience
Doktor (Ph.D.), Computer Science, Doktor (Ph.D.), Computer Science at Technische Universität Dortmund
Stackoverflow
18,602reputation
1.5mreached
458answers
5questions
android
top-5%
recursion
top-5%
java
top-1%
opengl
top-5%
websocket
top-5%
algorithm
top-1%
Github Skills (30)
kotlin10
algorithm10
c-language10
ansi-colors10
emoji10
java10
ansi-term10
javas10
android10
android-ui10
cpp10
cprogramming-language10
ansi-escape10
ansi10
image-processing9
Programming languages (13)
Github contributions (5)
stefanhaustein/TerminalImageViewer
Apr 2016 - Jun 2022
Small C++ program to display images in a (modern) terminal using RGB ANSI codes and unicode block graphics characters
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:3 releases, 5 reviews, 83 commits in 6 years 3 months
Contributions summary:Stefan primarily contributed to the Java-based image viewer project by adding features and improving functionality. Their work included implementing support for rendering multiple image files, enhancing the character set for image display, fixing 256 color mode and adding grayscale support, and incorporating the ability to obtain image paths from standard input. Additionally, they refined the directory-style rendering, introducing a columns count parameter. These modifications collectively expanded the program's capabilities and usability.
ansi-codescppascii-graphicslinuxrgb
vanniktech/Emoji
Aug 2017 - Sep 2017
A library to add Emoji support to your Android / iOS / JVM Application
Role in this project:Mobile Developer (Android)
Mobile Developer (Android)Contributions:5 commits, 5 PRs, 17 comments in 21 days
Contributions summary:Stefan primarily focused on enhancing the `emoji` library for Android. Their contributions involved refactoring the code to leverage drawables instead of resource IDs, improving emoji span replacements, and integrating the Google Compat library. They also made updates to the emoji display within various UI components, ensuring consistent rendering and compatibility across the application. The user's work included improvements in how emojis are displayed on the application and its different features.
emojikotlin-multiplatformandroidios-emojiskotlin
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