Jansel Valentin
Principal Software Engineer at Zalando
Berlin Metropolitan Area Germany
Summary
🤩
Rockstar🎓
Top SchoolJansel Valentin is a Principal Software Engineer based in the Berlin area with 11 years of experience building high-performance, scalable mobile and systems software. He has progressed through multiple senior roles at Zalando and earlier led mobile engineering efforts—designing cross-platform vision SDKs for face and object recognition and maintaining IPTV streaming apps—demonstrating deep expertise across Android and iOS. Naturally curious about how things work under the hood, he bridges low-level systems thinking with product-facing architecture and UI/UX concerns, as evidenced by contributions like a custom animated iOS "fave" button. Jansel combines hands-on implementation, mentorship, and architecture ownership to deliver reliable production services at scale while continuously learning new tools and techniques.
12 years of coding experience
11 years of employment as a software developer
ICT Telecomunication, ICT Telecomunication at Universidad IberoamericanaSoftware Development, Software Development at Intituto de las Americas ( ITLA )
Spanish, English
Stackoverflow
11,135reputation
978kreached
240answers
7questions
android
top-5%
closures
top-5%
swift
top-5%
access-modifiers
top-5%
textview
top-5%
Github Skills (15)
swift10
ios10
animation10
closures9
access-modifiers9
android9
uikit9
textview9
ui-design8
lambda6
variadic-templates6
line-spacing6
option-type6
rxjava6
java6
Programming languages (9)
Github contributions (5)
janselv/fave-button
Jun 2016 - Dec 2019
FaveButton is an iOS cute animated like button written in Swift.
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:2 releases, 47 commits, 13 PRs in 3 years 6 months
Contributions summary:Jansel primarily contributed to the development of an iOS application, specifically focusing on the implementation of a custom animated "like" button. Their work involved creating UI elements, managing animations, and integrating them with the application's functionality. The user's commits show modifications to the button's visual appearance and behavior, including animation adjustments and adding new features.
iosswift
janselv/smooth-gradient
May 2016 - Mar 2020
Swift CGGradient extension to smooth gradients into a gentler transition
Contributions:18 commits, 1 PR, 12 pushes in 3 years 10 months
swift
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