Martin Kustermann
Software Engineer at Google
Aarhus Municipality, Central Denmark Region, Denmark
Summary
🤩
RockstarMartin Kustermann is a software engineer with 13 years of experience based in Aarhus, Denmark, currently working at Google. He contributes to core developer tooling and mobile platforms, with notable open-source work on high-profile projects like Flutter and the Dart SDK and engine. His contributions range from Android and iOS engine integration and AOT build fixes to improving protobuf handling and robust test infrastructure, reflecting deep systems- and runtime-level expertise. Martin blends backend engineering with test automation, routinely adding edge-case fixes and tests that improve platform stability and cross-runtime behavior. He has a pragmatic focus on debugging, performance and compatibility, including non-obvious work such as normalizing Android tool paths and handling Uint8List offsets that prevent subtle production issues. Colleagues would describe him as a detail-oriented engineer who improves developer experience by fixing low-level bugs that pay dividends across large ecosystems.
13 years of coding experience
Stackoverflow
191reputation
2kreached
8answers
0questions
Github Skills (40)
unit-testing10
google-cloud-platform10
c-language10
mobile-development10
flutter-apps10
testing10
app-framework10
datastore10
gcp10
data-storage10
cplus10
android10
mobile10
flutter-game10
dart10
Programming languages (10)
Github contributions (5)
google/protobuf.dart
Jan 2015 - Jun 2022
Runtime library for Dart protobufs
Role in this project:
Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:69 reviews, 9 commits, 12 PRs in 7 years 6 months
Contributions summary:Martin primarily focused on bug fixes and improvements to the `protobuf.dart` library. They addressed issues related to protobuf decoding, particularly with Uint8List views and non-zero offsets, ensuring correct handling of byte arrays. Further contributions included fixing analyzer warnings and bugs related to the `Iterable` interface and improving code related to map fields. They also refactored code by removing closures and preparing the project for NNBD.
dartprotobuf
dart-lang/sdk
Nov 2012 - Jan 2023
The Dart SDK, including the VM, JS and Wasm compilers, analysis, core libraries, and more.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1728 commits, 1 PR, 149 pushes in 10 years 4 months
Contributions summary:Martin primarily worked on the Dart SDK, contributing to the core functionalities of the VM. Their work included fixing bugs, ensuring the stability and efficiency of the system's components, particularly those related to concurrency. They were involved in implementing improvements for data transfer and inlining optimizations. The user also made contributions to the test suite, including the addition of new tests to improve code coverage.
compilerdartjssdkprogramming-language
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.