Karol Wrotniak
Subject Matter Expert
Wrocław, Lower Silesian Voivodeship, Poland
Summary
🤩
Rockstar🎓
Top SchoolKarol Wrotniak is a Subject Matter Expert and seasoned mobile developer with 13 years of experience building Android and Flutter apps, tooling, and CI/CD integrations while mentoring and recruiting across international client projects. Based in Wrocław, he contributes to notable open-source tooling such as STF—enhancing Android device management with security and device-control features—and blends full-stack problem solving with practical maintainer work. At Kodeco he creates multimodal learning content, producing written guides and video demos that translate complex Android concepts into approachable courses. His background includes long-term hands-on delivery at Droids On Roids and an M.Sc. in Computer Science, combining deep platform expertise with a knack for developer education and tooling improvements.
13 years of coding experience
Master of Science (M.Sc.) Computer Science, Master of Science (M.Sc.) Computer Science at Wrocław University of Science and Technology
Polish, English, German, French
Stackoverflow
2,533reputation
157kreached
55answers
6questions
android
top-5%
java
top-5%
http
top-5%
Github Skills (26)
javascript10
java9
http9
angularjs9
android9
oauth9
rest-api8
android-development8
api-rest8
restful-api8
api-design8
native-android8
mobile-development8
git7
typescripts6
Programming languages (20)
Github contributions (5)
openstf/stf
Jan 2017 - Aug 2020
Control and manage Android devices from your browser.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:1 release, 58 commits, 52 PRs in 3 years 7 months
Contributions summary:Karol implemented new features and fixed bugs within the STF (Android device management) project. They added email domain restrictions for OAuth2 authorization and replaced hardcoded HTML with a template, improving security and maintainability. The user also introduced new functionalities related to device control, including adding an app switch key, and enhanced device property information by incorporating OpenGL ES version and market name. They also merged upstream changes, indicating a role in maintaining the project's code base.
browserandroid-devicesandroidstfandroid-development
DroidsOnRoids/bitrise-step-trigger-bitrise-workflow
Nov 2017 - Apr 2019
Bitrise step for triggering workflow on bitrise.io with specified parameters
Contributions:8 releases, 22 commits, 18 PRs in 1 year 5 months
bitrisebitrise-stepparametersworkflow
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