Ralf Wondratschek
Senior Staff Software Engineer (L7) at Speaking Engagements
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolRalf Wondratschek is a senior software engineer and technical leader with 12 years of experience building high-scale Android and cross-platform systems from startup to enterprise. He has driven developer productivity and modularization at companies like Block, Amazon, and Square—authoring and operating large-scale initiatives such as isolated development, the Anvil Kotlin compiler plugin, and a Kotlin Multiplatform app platform that streamlined multi-platform delivery. Equally comfortable in hands-on refactors and architectural strategy, he’s improved build times, IDE sync, and testing stability across codebases with millions of lines. An active open-source maintainer and speaker, his Android libraries and contributions (e.g., to Evernote SDK and Square projects) are widely used and reflect a pragmatic focus on tooling that scales. Based in San Francisco, he combines deep Android expertise with cross-platform systems thinking and a knack for turning developer pain points into production-grade infrastructure.
12 years of coding experience
13 years of employment as a software developer
Master of Science (M.Sc.), Informatik, 1.4 (where 1.0 is the best), Master of Science (M.Sc.), Informatik, 1.4 (where 1.0 is the best) at Friedrich-Schiller-Universität Jena
German, English
Stackoverflow
5,012reputation
554kreached
48answers
19questions
android
top-5%
android-studio
top-5%
android-gradle-plugin
top-5%
Github Skills (30)
kotlin10
dagger10
mobile-development10
permission10
compiler-plugin10
android-sdk10
ui-design10
android-development10
java10
javas10
androidmanifest10
android10
coroutines10
gradlew10
dependency-injection10
Programming languages (9)
Github contributions (5)
Evernote/evernote-sdk-android
Mar 2015 - Aug 2016
Evernote SDK for Android
Role in this project:
Mobile Developer (Android)
Mobile Developer (Android)Contributions:38 commits, 4 PRs, 15 pushes in 1 year 5 months
Contributions summary:Ralf primarily addressed comments and implemented changes within the Evernote Android SDK. They updated the EvernoteUtil class, added WebView handling and destruction within the EvernoteOAuthActivity, and modified various Login related files. The commits involved upgrading target and compile SDK versions. The user's work also included adding a feature to download a note as HTML and refactoring code.
evernote-sdkandroidsdkevernote
square/anvil
Jun 2020 - Jan 2023
A Kotlin compiler plugin to make dependency injection with Dagger 2 easier.
Role in this project:Back-end Developer
Back-end DeveloperContributions:44 releases, 565 reviews, 965 commits in 2 years 7 months
Contributions summary:Ralf focused on improving the Anvil Kotlin compiler plugin to make dependency injection with Dagger 2 easier. Their contributions included refactoring the code generation process, improving configuration caching, and sharing state between Gradle tasks using BuildServices. They also addressed various issues such as disabling precise Java tracking and supporting nested class imports.
kotlin-compileranvildagger-2daggerinjection
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