Calin (Radu) Calin

Senior iOS Developer | Contractor | Freelancer

Berlin, Deutschland

Erfahrungen

Jan. 2021 - Dez. 2023
2 Jahren

Senior iOS Developer | Contractor | Freelancer

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.
  • Firebase Auth, Google Places, Google Maps, Segment, Adjust, Braze, Rich Push Notifications.
Jan. 2021 - Dez. 2022
1 Jahr

Senior iOS Developer | Contractor | Freelancer

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.
  • SwiftUI, App Clip, Apple Pay, Stripe SDK, GitHub Actions.
Jan. 2020 - Dez. 2022
2 Jahren

Senior iOS Developer | Contractor | Freelancer

Marquardt Service App

  • 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.
  • Core Data, NSFetchedResultsController, Diffable Data Sources, Cell Content Configuration, Combine, MapKit, PhraseSDK, Bitrise.
Jan. 2020 - Dez. 2021
2 Jahren

Senior iOS Developer | Contractor | Freelancer

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.
  • Apple IAP, tvOS, SwiftUI, CircleCi, fastlane, git submodules.
Jan. 2019 - Dez. 2020
2 Jahren

Senior iOS Developer | Contractor | Freelancer

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.
  • Database Design, StoreKit, Travis CI.
Jan. 2018 - Dez. 2020
2 Jahren

Senior iOS Developer | Contractor | Freelancer

Garmin Pilot

  • Companion app that connects to various Garmin devices installed on a private airplane.
  • 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.
  • PDFKit, Firebase, Build Time Optimization.

Zusammenfassung

I am a freelancer with 8+ years of experience in iOS development. I help companies around the world implement their mobile solution, focusing on an exceptional user experience.

Sprachen

Rumänisch
Muttersprache
Englisch
Verhandlungssicher

Ausbildung

Technical University of Cluj-Napoca

Bachelor of Computer Information Technology · Computer Information Technology · Cluj-Napoca, Rumänien