Marius Landwehr
CTO & Product Lead at Oak Horizon GmbH
Lotte, North Rhine-Westphalia, Germany
Summary
🤩
Rockstar🎓
Top SchoolMarius Landwehr is a seasoned technology leader and CTO & Product Lead with 13 years of experience building native apps and integrations that remove language barriers for millions of users. He combines hands-on iOS/macOS development and open-source contributions (notably UI and platform compatibility work on projects like PINRemoteImage and TSMessages) with proven engineering management at scale from DeepL, where he led native apps, integrations and multi-team product OKRs. Comfortable moving between code and strategy, he has a track record of recruiting and growing teams, architecting shared frameworks, and shipping high-coverage Swift apps using RxSwift, gRPC and SwiftUI. Based in Lotte, Germany, he marries product focus with practical implementation—often improving developer workflows and cross-platform compatibility behind the scenes. Outside work he’s an analog enthusiast who gardens, spins vinyl and experiments with his dog as a QA partner.
13 years of coding experience
15 years of employment as a software developer
Haupt- und Realschule Pingel Anton, Cloppenburg, NiedersachsenBBS Technik Cloppenburg
German, English
Stackoverflow
1,205reputation
288kreached
30answers
19questions
Github Skills (20)
objective-c10
ios10
lib10
ui-design10
autolayout10
uid10
notification10
front-end-development10
swift10
uikit10
cocoapods10
image-processing9
api-design8
interface-builder7
coreanimation6
Programming languages (9)
Github contributions (5)
KrauseFx/TSMessages
Jul 2013 - May 2014
💌 Easy to use and customizable messages/notifications for iOS à la Tweetbot
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:9 commits, 2 PRs, 16 comments in 10 months
Contributions summary:Marius primarily focused on modifying and maintaining the iOS message notification library. Their contributions involved refactoring code, renaming classes, and updating dependencies for better integration with CocoaPods and future MacOS compatibility. The user also addressed navigation bar issues, including correct calculation of the view height, and adjusted the example project for improved functionality and correct display.
cocoapodsobjective-cnotificationscustomizableios
pinterest/PINRemoteImage
Dec 2015 - Dec 2016
A thread safe, performant, feature rich image fetcher
Role in this project:Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:27 commits, 5 PRs, 29 comments in 1 year
Contributions summary:Marius primarily contributed to the iOS image fetcher library, focusing on enhancing Swift support and addressing platform compatibility issues. Their work involved updating the codebase with nullable and nonnull operators to improve Swift interoperability, refining header files for better Swift integration, and addressing warnings. Additionally, they made changes related to platform-specific availability, suggesting a focus on ensuring the library functions correctly across different iOS environments.
objective-cimagegifsfeature-richsdwebimage
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.