Jesus Guerra Rosas

Jesus Guerra Rosas

Hermosillo, Mexico
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Jesus Guerra Rosas

Jesus Guerra Rosas

Hermosillo, Mexico
Member since January 14, 2013
Jesus is an iOS developer with six years of intensive experience in Objective-C as a main language and over a year using Swift. He has experience with Apple's approval and distribution process, and is proficient using iOS Instruments tools and object-oriented programming in Objective-C and iOS SDK. He also has a number of published and successful apps on the App Store.
Jesus is now available for hire
Portfolio
Experience
  • Objective-C, 6 years
  • iOS, 6 years
  • Swift, 2 years
  • Scrum, 6 years
  • Realm, 1 year
Hermosillo, Mexico
Availability
Part-time
Preferred Environment
iOS, Objective-C, Swift, Xcode, Git
The most amazing...
...software I've ever coded is a sync data feature that syncs all data across all devices (iPhone/iPad) with the server for each user profile inside the app.
Employment
  • Senior iOS Developer
    Daily Spot
    2016 - PRESENT
    • Created an app from scratch.
    Technologies: Swift, CocoaPods, Web services (JSON), TestFlight, Crashlytics, iOS
  • Senior iOS Developer
    Nearsoft
    2010 - PRESENT
    • Helped design and implement several iOS apps using Objective-C as the main language along with the iOS SDK, with Appcelerator Titanium being used in some cases.
    • Communicated closely with clients to define requirements and write design documents and technical specifications.
    • Built application tests with UIAutomation and GHUnit/OCUnit.
    • Provisioned, compiled, and managed apps for ad hoc and app store distribution. Submitted apps to the app store for approval.
    • Helped produce AetherPad, an app that allows anesthesiologists to efficiently record case events. It syncs all the data with the server through several JSON web services.
    • Helped update GigaOM using Appcelerator Titanium.
    Technologies: Scrum methodology, Foundation Framework, AVFoundation, Web services (JSON/XML), OOP, Xcode, TestFlight, RestKit, QuincyKit, ASIHTTPRequest, Source control (SVN, Git), Appcelerator Titanium
  • Senior iOS Developer
    7 Minute Prayer Challenge
    2016 - 2016
    • Made general stability and performance improvements to this iOS app.
    • Created a custom player module.
    • Added Sync prayers module.
    Technologies: Objective-C, Parse, Cocoapods
  • Senior iOS Developer
    CannonBall (via Toptal)
    2014 - 2016
    • Applied new layouts and solved UI issues.
    • Used EKEventStore to sync events in the calendar.
    • Implemented iOS enchantments.
    • Made several performance improvements.
    • Implemented native sharing using UIActivity​View​Controller.
    • Refactored code and fixed bugs.
    • Handled REST API iterations (consuming and sending to the server).
    Technologies: Objective-C, iOS, Scrum methodology, Foundation Framework, Web services (JSON), TestFlight, Crashlytics
  • Senior iOS Developer
    Paktor (via Toptal)
    2013 - 2013
    • Made iOS7-compatible enhancements.
    • Applied a new layout and solved UI issues.
    • Refactored code and fixed bugs.
    • Wrote automation test scripts.
    • Worked on localization.
    Technologies: Objective-C, iOS, Automation
  • Senior iOS Developer
    Patrolife (via Toptal)
    2013 - 2013
    • Created full support for iOS 7.
    • Wrote a submodule to handle "no internet connections" events.
    • Added Russian localization using Localizable.strings.
    • Solved UI issues that cropped up due the new iOS 7 Extended Layout.
    • Improved GPS monitoring.
    Technologies: Objective-C, iOS, CocoaPods
  • iOS Developer
    Viisto Software
    2009 - 2010
    • Designed and implemented an iPhone app that produces sales reports by parsing XML files obtained from a web service.
    Technologies: Objective-C, Foundation Framework, iOS SDK, Web services (XML), SQLite., GHUnit/OCUnit, SVN
Experience
Skills
  • Languages
    Objective-C, Swift
  • Platforms
    iOS, Mac OS X
  • Frameworks
    Foundation, JSON Framework for Objective-C, AV Foundation, OCUnit, Map Kit, Message UI, RestKit, Cocoa Touch, CFNetwork, GHUnit, Core Location
  • Libraries/APIs
    SQLite, ASIHTTPRequest, AFNetworking, Flurry
  • Tools
    Crashlytics, Xcode, Pivotal Tracker, JIRA, iOS Simulator, QuincyKit, iOS Instruments
  • Paradigms
    Object-oriented Programming (OOP), Scrum
  • Storage
    Realm
Education
  • Bachelor's degree in Computer Systems Engineering
    Technological Institute of Hermosillo - Sonora, Mexico
    2002 - 2007
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