Joel Arvidsson

Malmo, Sweden

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Summary

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Joel Arvidsson is a seasoned software engineer with 12 years of experience specializing in JavaScript and React Native, focused on crafting polished mobile experiences. He has held senior engineering roles at Klarna, including Principal Engineer, where he combined technical leadership with hands-on delivery. An active open-source contributor, Joel has significantly improved core React Native ecosystem projects such as react-native-gesture-handler, react-native-keychain and facebook/react-native, often addressing platform-specific quirks and accessibility/testing gaps. His work spans UI/UX, native modules (iOS/Android), and tooling for visual regression and performance, demonstrating both breadth and depth across mobile stacks. Based in Malmö, Sweden, he brings a pragmatic engineering mindset informed by a non-traditional academic background (Master in Dentistry), which surfaces in a detail-oriented, user-focused approach to building software.

12 years of coding experience

5 years of employment as a software developer

Master, Dentistry, Master, Dentistry at Malmö University

Natural Science, Natural Science at S:t Petri

English, Swedish

Stackoverflow

Stats

2,974reputation

144kreached

31answers

0questions

Badges

react-native

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scroll

top-5%

listview

top-5%

javascript

top-5%

Github Skills (44)

objective-c10

javascript10

ios10

react-native10

mobile-development10

animation10

storybook10

testing10

component-development10

swiftui-app10

gesture10

ui-design10

accordion10

uid10

front-end-development10

Programming languages (15)

MDXJavaC++RustCObjective-C++GoHTML

Github contributions (5)

oblador/react-native-animatable

Oct 2015 - Dec 2019

Standard set of easy to use animations and declarative transitions for React Native

Role in this project:

Front-end Developer

Contributions:23 releases, 2 reviews, 145 commits in 4 years 2 months

Contributions summary:Joel primarily contributed to the development of animation features within the React Native library. They implemented a wide range of new animations, including flip, slide, zoom, bounce, fade, and lightSpeed animations, significantly expanding the library's functionality. Furthermore, they incorporated support for declarative and imperative animation approaches, as well as custom easing functions, offering developers more flexibility in their implementations. The user also added support for native animation drivers to improve performance.

reactanimationreact-native-libraryreact-nativedeclarative

oblador/react-native-image-progress

Jul 2015 - Jan 2022

Progress indicator for networked images in React Native

Role in this project:

Mobile Developer (iOS)

Contributions:10 releases, 1 review, 82 commits in 6 years 6 months

Contributions summary:Joel primarily focused on developing and maintaining the React Native image progress component. Their contributions included fixing bugs related to progress bar visibility, adding spinner and bar indicator styles, and adding the ability to nest images within the component. They also improved the component's event handling and implemented features like the custom indicator and error handling. Additionally, the user updated the example project and modernized the code base for newer React Native versions.

react-nativenetworkedreactprogress-indicator

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