Tina Müller - Engineer at Self-employed

Tina Müller

Engineer at Self-employed

Berlin, Germany

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Summary

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Rockstar

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Top School

Tina Müller is an experienced engineer based in Berlin with 14 years of hands-on experience building backends, test and build infrastructures, and automation for open-source and enterprise projects. She combines deep expertise in Perl, Python/YAML, shell scripting and CI with a pragmatic focus on automating repetitive work to save time—often by building tooling such as sophisticated shell-completion generators and a grammar-based YAML parser. A long-term contributor and maintainer in the YAML ecosystem (including libyaml, PyYAML and the official test suite) and to openQA/openSUSE testing frameworks, she brings both QA/test-automation instincts and backend optimisation skills. Colleagues know her for fast bug sleuthing, thoughtful refactors (centralising JSON RPC in os-autoinst), and making developer tools more usable across shells and platforms.

14 years of coding experience

19 years of employment as a software developer

Computer Science, Computer Science at Freie Universität Berlin

Stackoverflow

Stats

4,147reputation

264kreached

92answers

1question

Badges

perl

top-5%

yaml

top-1%

Github Skills (42)

json10

git10

maintenance10

back-end-development10

python10

scripting10

testing10

bash10

flatpak10

c1110

perl10

cicd10

c1710

script10

build-automation10

Programming languages (24)

C#JavaC++CMakefileGoPerlHTML

Github contributions (5)

os-autoinst/os-autoinst

Aug 2019 - Jan 2023

OS-level test automation

Role in this project:

Test Automation Engineer

Contributions:780 reviews, 152 commits, 222 PRs in 3 years 5 months

Contributions summary:Tina significantly improved the test automation framework by modifying the `validate_script_output` function in `testapi.pm` to enhance result display and usability, allowing the use of regular expressions. They refactored JSON communication across the project, centralizing it through `myjsonrpc.pm` and enabled the return of multiple results, which fixed existing bugs in the process. Furthermore, the user added a status file and improved error reporting for critical commands, ensuring test stability and providing more informative debugging output.

test-executiontest-automationtestingvirtualizationautomation

yaml/libyaml

Nov 2017 - Nov 2021

Canonical source repository for LibYAML

Role in this project:

Back-end Developer

Contributions:1 release, 3 reviews, 67 commits in 4 years

Contributions summary:Tina primarily contributed to the `libyaml` library by fixing bugs and improving its functionality. Their commits focused on refining the YAML parsing and emitting processes, including handling edge cases with single quotes, directives, and flow collections. Furthermore, the user made significant updates to ensure compatibility with YAML 1.2 specifications. The user also contributed to test suite improvements.

libyamlyaml-parseryaml-emittercanonicalyaml

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