Alex Grebenyuk
Florida, United States
Summary
🤩
RockstarAlex Grebenyuk is a seasoned software engineer with 12 years of experience specializing in Apple platforms (Swift, Objective-C, UIKit, SwiftUI) and a proven track record across startups and large enterprises. He has led teams and delivered complex iOS projects—improving app quality and ratings through better processes, testing, and trunk-based development with feature flags. A prolific open-source maintainer since 2014, Alex created popular frameworks such as Nuke, Pulse, and Get, accumulating over 17K stars and influencing image loading and caching practices in the iOS community. At EPAM he drove large client integrations, hiring, and technical standards; he now contributes at Automattic while continuing to publish influential technical writing on kean.blog. Notably, his work on performance-focused image libraries has been directly applied to real apps like IceCubesApp, demonstrating an uncommon blend of deep engineering craft and product-minded optimizations.
13 years of coding experience
Stackoverflow
1,561reputation
238kreached
30answers
1question
ios
top-5%
Github Skills (15)
swift10
uikit10
swiftui-app10
ios10
mobile-development10
swiftui10
image-processing9
objective-c6
caching6
uitableview6
cocoa-touch6
sdwebimage6
iphone6
autolayout6
photokit6
Programming languages (10)
Github contributions (5)
kean/DFImageManager
Oct 2014 - Nov 2019
Image loading, processing, caching and preheating
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:49 releases, 785 commits, 10 PRs in 5 years 1 month
Contributions summary:Alex's contributions primarily involved integrating and utilizing the DFImageManager library within a sample iOS project to handle image loading, processing, and display. They made several code changes to incorporate the library, including installing it, adapting it to handle new request methods, and adjusting the UI layout within a collection view controller to showcase the image display features. The commits demonstrate a focus on integrating the library into a sample project and demonstrating its usage.
cachingimage-loading
Dimillian/IceCubesApp
Dec 2022 - Feb 2023
A SwiftUI Mastodon client
Role in this project:iOS Mobile Developer
iOS Mobile DeveloperContributions:4 reviews, 10 commits, 9 PRs in 1 month
Contributions summary:Alex primarily focused on updating and optimizing the application's UI and underlying code using Swift and SwiftUI. They addressed image loading and display performance by integrating Nuke for image processing. They also refactored code to improve performance. Further optimizations included code refactoring and prefetching of data, likely to enhance the user experience.
swiftuiiosswiftmastodon
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