Radu Calin
Senior iOS Developer
Experience
Senior iOS Developer
Gorillas
Groceries and food ordering app delivering the products in minutes.
- Successfully migrated 99.9 of the users to the new app by automatically logging them in using the token retrieved from the old app.
- Facilitated more than 400k signups in the first 3 months after releasing the redesigned app by supporting phone, Apple, Google, Facebook authentication methods implemented using Firebase.
- Helped more than 250k users successfully add their address by supporting search using Google Places and by selecting the exact location using Google Maps based on the service delivery zones.
Skills: Firebase Auth, Google Places, Google Maps, Segment, Adjust, Braze, Rich Push Notifications
Senior iOS Developer
Flash
Instant mobile checkout app entirely implemented in SwiftUI.
- Helped the business process over 10 successful orders by implementing an App Clip capable of processing the delivery information using Apple Pay UI and handling the payments using Stripe SDK.
- Improved the products loading experience by integrating a caching layer implemented using Core Date and FetchRequest.
Skills: SwiftUI, App Clip, Apple Pay, Stripe SDK, GitHub Actions
Senior iOS Developer
Marquardt
Internal app that helps employees organize their day to day work by digitalizing the entire paperwork process.
- Implemented the app from scratch to App Store as the only iOS developer.
- Reduced networking traffic by 100% by adding offline support for the main functionality using Core Data and NSFetchedResultsController.
- Reduced time spent for creating Firebase and TestFlight builds by 100% by automating the entire build process using Bitrise.
Skills: Core Data, NSFetchedResultsController, Diffable Data Sources, Cell Content Configuration, Combine, MapKit, PhraseSDK, Bitrise
Senior iOS Developer
Yummly
Recipe app that has received the "Editors' Choice" badge from Apple.
- Increased monthly business revenue by 12% by redesigning the paywall using modern layout that supports displaying of content using one or two columns depending on the device orientation.
- Increased revenue by getting over 10 monthly subscribers that joined on the paywall that I implemented in the existing tvOS application.
Skills: Apple IAP, tvOS, SwiftUI, CircleCi, fastlane, git submodules
Senior iOS Developer
Fortune
Content app that brings Fortune news, newsleters, and videos on mobile at devices.
- Increased business revenue from $0 to $10k per month by monetizing the app by adding a $21.99 in-app subscription item that appeared on a screen triggered by an external service depending on the article tags.
- Dropped user search time from 5-10 minutes to less than 1 minute by designing and implementing a custom search functionality while adding a set of annotation tools using PDFKit.
- Improved customer service team efficiency by 40% by reducing the number of daily phone calls by designing and building and in-app feedback system without adding additional server load by automating the email feedback using Firebase Cloud Functions.
Skills: Database Design, StoreKit, Travis CI, PDFKit, Firebase, Build Time Optimization
Senior iOS Developer
Garmin
Companion app that connects to various Garmin devices installed on a private airplane.
Summary
Languages
Education
Technical University of Cluj-Napoca
Computer Information Technology · Cluj-Napoca, Romania
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