Oskar Groth
Co-Founder at Sparkmint
Stockholm, Sweden
Summary
👤
Senior🎓
Top SchoolOskar Groth is a Stockholm-based Co-Founder and seasoned software engineer with 11 years of experience building consumer and productivity apps, particularly for macOS and iOS. As founder of Cindori and co-founder of Sparkmint, he blends product design, Swift engineering, and emerging AI to create polished user experiences and AI tools "for the rest of us." An active open-source contributor, he has improved high-profile tooling like DifferenceKit (animated UI updates for UITableView/UICollectionView) and the Shiki syntax highlighter, showing a knack for performant UI diffs and language tooling. He holds an MSc in Software Engineering from Lund and pairs entrepreneurial instincts with hands-on development—often shipping both design and code himself. An interesting quirk: he moves fluidly between pixel-level Mac app design and low-level algorithmic tweaks, which has led to repeated contributions that bridge UX and performance.
11 years of coding experience
1 year of employment as a software developer
Luleå GymnasieskolaMaster of Science in Computer Engineering, Software Engineering, Master of Science in Computer Engineering, Software Engineering at The Faculty of Engineering at Lund University
Stackoverflow
3,644reputation
245kreached
96answers
10questions
macos
top-5%
swift
top-5%
scenekit
top-5%
cocoa
top-5%
Github Skills (25)
javascript10
ios10
difflib10
typescript10
uitableview10
uicollectionview10
typescript-types10
swift10
typescripts10
diff310
syntax-highlighting10
cocoa9
scenekit9
macos9
algorithm8
Programming languages (10)
Github contributions (5)
shikijs/shiki
Apr 2022 - Aug 2022
A beautiful yet powerful syntax highlighter
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:6 commits, 1 PR, 5 comments in 3 months
Contributions summary:Oskar primarily contributed to improving the syntax highlighting capabilities of the project. They focused on adding features like color remap overrides, cleaning up code, and adding parameter types to the highlighter. They also updated the language definitions by merging in changes from the main branch and fixing missing types. This included extending support for new languages and updating existing language configurations.
syntax-highlightermarkdownshikisyntax-highlightingtextmate-grammar
ra1028/DifferenceKit
Sep 2018 - Sep 2018
💻 A fast and flexible O(n) difference algorithm framework for Swift collection.
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:7 commits, 1 PR, 2 comments in 3 days
Contributions summary:Oskar primarily contributed to the project by adding and modifying extensions to support UI updates in iOS/tvOS, specifically around `UITableView` and `UICollectionView`. Their changes focused on applying animated updates using `StagedChangeset`, which suggests a focus on efficiently updating UI elements. The user also made revert commits, likely debugging or rolling back changes related to AppKit and macOS support.
swiftdiffchangesetcollectionviewdiffing
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