Klemens Mantzos
Sofware Developer at NOWA Innovation Hub
Vienna, Austria
Summary
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RockstarKlemens Mantzos is a versatile software developer based in Vienna with 16 years of hands-on experience building backend systems, full-stack applications and iOS mobile apps. He has shipped production software across startups and established companies, moving between roles from mobile engineering to senior backend development and systems administration. An active open-source contributor, Klemens has improved UX and stability in well-known projects like Django Grappelli and the Sentry Cocoa SDK, including work on admin UI, timepickers, test stability and CI automation. He combines a pragmatic, user-centric approach with a knack for automation and build reliability, which shows in both app-level fixes and CI/CD improvements. Equally comfortable refactoring legacy code and prototyping new features, he brings an entrepreneurial mindset from multiple self-employed and co-founder roles.
16 years of coding experience
15 years of employment as a software developer
English, German
Stackoverflow
21reputation
4kreached
0answers
2questions
Github Skills (27)
objective-c10
ios10
python10
django10
cocoa10
sdk10
crash-reports10
error-handling10
swift10
javascript9
unit-testing9
user-interface9
cicd9
automation9
automations9
Programming languages (15)
Github contributions (5)
sehmaschine/django-grappelli
Jan 2010 - Nov 2010
A jazzy skin for the Django Admin-Interface (official repository).
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:203 commits, 1 issue in 10 months
Contributions summary:Klemens primarily contributed to the Django Admin-Interface, Grappelli, by fixing various issues related to the UI and functionality. Their commits demonstrate work on template modifications, JavaScript enhancements, and CSS adjustments to improve the user experience and address specific bugs. They also worked on improving the timepicker and related object lookups within the Django admin interface. Moreover, the user performed general code refactoring and updated the version number.
pythonadmindjangojazzyadmin-interface
getsentry/sentry-cocoa
Nov 2019 - Feb 2020
The official Sentry SDK for iOS, tvOS, macOS, watchOS.
Role in this project:Mobile Developer (iOS) & Automation Engineer
Mobile Developer (iOS) & Automation EngineerContributions:2 releases, 68 commits, 53 PRs in 2 months
Contributions summary:Klemens primarily focused on improving the Sentry Cocoa SDK, specifically by releasing new versions, merging releases, and addressing linting issues. They also worked on removing broken unit tests and fixing failing tests related to SentryCrash, ensuring the stability of the SDK. Additionally, the user modified the CI/CD pipeline by dropping gem installs and moving dependencies to the `.travis.yml` file. This indicates involvement in automation and build processes.
objective-csentrytvoserror-monitoringsentry-sdk
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