Julien Karst
Tech Lead - React.js at Discovery Inc
Nancy, Grand Est, France
Summary
🤩
Rockstar🎓
Top SchoolJulien Karst is a tech lead and full-stack mobile/web engineer with 11 years of experience building everything from promotional games and loyalty apps to large React.js and React Native platforms. He currently leads React initiatives at Warner Bros. Discovery while running his own studio, Karst Development, delivering both front- and back-end solutions with a strong eye for detail and deadlines. His background spans iOS/Swift, Objective-C, Redux-sagas, CI pipelines and TDD, and he has contributed practical fixes and enhancements to the popular MessageKit iOS messaging framework. Comfortable in product and architectural roles, Julien blends hands-on coding with project leadership across media and consumer-facing products. He also brings a founder’s perspective—managing a château rental business and investing—so he pairs technical decisions with commercial awareness. Based in Nancy, France, he’s known for inventive solutions like iBeacon/QR-based loyalty features and a pragmatic focus on shipping polished, usable experiences.
11 years of coding experience
2 years of employment as a software developer
Startups, Startups at Join LionMaster Project Management, Master Project Management at Université de Haute-Alsace Mulhouse-ColmarEpitechBaccalauréat STI2D SIN, Baccalauréat STI2D SIN at Pierre de Coubertin - NancyComputer Science, Computer Science at California State University San Marcos
English, German
Stackoverflow
5,209reputation
341kreached
130answers
1question
swift
top-5%
react-redux
top-5%
vite
top-5%
javascript
top-5%
redux
top-5%
ios
top-5%
Github Skills (23)
ios10
ui-design10
uid10
front-end-development10
messagekit10
swift10
react-redux9
react-native9
javascript9
redux9
vite9
react9
chat8
messaging8
parse-server6
Programming languages (12)
Github contributions (5)
MessageKit/MessageKit
Oct 2018 - Nov 2018
A community-driven replacement for JSQMessagesViewController
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:12 commits, 5 PRs, 3 pushes in 1 month
Contributions summary:Julien primarily focused on enhancements and bug fixes within the `MessageKit` iOS framework. Their contributions involved addressing issues related to the accessory view, improving the detection of custom patterns, and refactoring the MessageLabel component. The user also integrated delegate methods within the examples to manage custom detections, thereby improving the framework's usability and adaptability.
jsqmessagesviewcontrollermessagingmessengermessageswift
JulienKode/pull-request-name-linter-action-example
May 2020 - Jul 2022
Example of pull-request-name-linter-action
Contributions:16 commits, 8 PRs, 4 pushes in 2 years 2 months
linter
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