Joel Rosenblatt
Senior Mobile Frontend Engineer at LeanScaper
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolJoel Rosenblatt is a Berlin-based Tech Lead with 11 years of hands-on experience building polished front-end experiences and leading engineering teams. He progressed from web development bootcamp to senior engineering and tech lead roles at Artsy, where he improved React/TypeScript analytics and refined the React Native mobile app UI for a prominent art marketplace. Joel combines product-minded UI craftsmanship—restyling inbox and conversation components, adding unread counters and artwork modals—with a focus on reliable analytics and tracking across web and mobile. Now leading at Codepan GmbH, he blends mentorship and delivery discipline with a pragmatic approach to design-consistent interfaces. An unusual background in music performance and instrument building hints at a creative, detail-oriented problem solver who values both aesthetics and engineering rigor.
11 years of coding experience
10 years of employment as a software developer
Web Development Immersive, Web Development Immersive at General AssemblyBachillerato Arquitectura, Bachillerato Arquitectura at PRE/UAssociate of Arts (AA) in Music Performance (Guitar) & Certificate in Intrument Bulding and Repair Guitar Performance, Associate of Arts (AA) in Music Performance (Guitar) & Certificate in Intrument Bulding and Repair Guitar Performance at Musicians Institute
English, Spanish, German, Japanese
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (19)
javascript10
react-native10
typescript10
ui-design10
analytics10
uid10
android-app10
front-end-development10
typescript-types10
iphone-app10
typescripts10
react10
application10
graphql8
wordpress-graphql8
Programming languages (5)
Github contributions (5)
artsy/eigen
Aug 2020 - Sep 2022
The Art World in Your Pocket or Your Trendy Tech Company's Tote, Artsy's mobile app.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:111 reviews, 61 commits, 48 PRs in 2 years 1 month
Contributions summary:Joel primarily focused on restyling and improving the user interface within the Artsy/eigen repository, which is a mobile app. They restyled the conversations list to look closer to the web version and updated the inbox's appearance. The contributions involved modifying React Native components, including the composer and conversation snippet, to improve the app's visual design and user experience, adding features such as an unread counter. They also touched on various aspects of the application including artwork modals.
mobile-applicationobjective-cswiftapp-storereact-native
artsy/force
Jun 2020 - Sep 2022
The Artsy.net website
Role in this project:Front-end Developer
Front-end DeveloperContributions:162 reviews, 58 commits, 77 PRs in 2 years 3 months
Contributions summary:Joel primarily focused on front-end development, specifically within the context of a website built with React and TypeScript. Their work involved modifying and enhancing the application's analytics tracking, including the removal of time-based events and the implementation of cohesion for page time tracking. They also adapted the codebase to use new tracking methods and made modifications to the mobile analytics components to ensure event tracking consistency, suggesting a focus on improving website performance metrics.
reactjavascriptartsyexpress-jsgraphql
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