Jesus Guerra, iOS Developer in Hermosillo, Mexico
Jesus Guerra

iOS Developer in Hermosillo, Mexico

Member since January 14, 2013
Jesus is an iOS developer. He has been developing iOS apps with Objective-C and Swift for over seven years and has extensive expertise in the entertainment, sports, and social media industries. He works closely with clients to define requirements, write design documents, and create technical specifications, also sharing his expertise in the Apple approval and distribution process.
Jesus is now available for hire

Portfolio

  • Pretty Shell, Inc
    RealmSwift, Firebase iOS SDK, Google iOS SDK, Model View Viewmodel (MVVM)...
  • VarageSale: Buy & Sell
    RealmSwift, Firebase iOS SDK, Google iOS SDK, Model View Viewmodel (MVVM)...
  • Itau: Bank App
    Firebase iOS SDK, GitFlow, SwiftLint, Fastlane, Xcode, Swift, iOS, CocoaPods...

Experience

Location

Hermosillo, Mexico

Availability

Part-time

Preferred Environment

RealmSwift, Model View Viewmodel (MVVM), GitFlow, SwiftLint, Fastlane, Xcode, Swift, Objective-C, iOS, CocoaPods, Git

The most amazing...

...software I've 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

    2019 - PRESENT
    Pretty Shell, Inc
    • Kicked off the app from scratch, using MVVM with RxSwift as the main design architecture.
    • Coded and configured core architecture layers: networking, data processing, and presentation.
    • Enhanced API calls in the network layer using Alamofire and RxSwift.
    • Used Realm to store and manipulate some of the data generated by the user and consumed from the server in the data processing layer.
    • Built the UI using a combination of storyboard, XIBs, and code-only components.
    Technologies: RealmSwift, Firebase iOS SDK, Google iOS SDK, Model View Viewmodel (MVVM), GitFlow, MapKit, Realm, Jira, SwiftLint, Fastlane, Xcode, Swift, iOS, Bundler, SnapKit, Scrum, Analytics, Stripe, Firebase, RxSwift, Alamofire
  • Lead iOS Developer

    2018 - 2019
    VarageSale: Buy & Sell
    • Migrated the codebase from Swift 3 to Swift 4 and refactor-update architecture from MVC to MVVM with RxSwift.
    • Added support for iPhone X, along with multiple stability and performance fixes.
    • Integrated Firebase SDK, including analytics, AdMob, and messaging.
    • Configured the integration server with fastlane on CircleCI.
    • Updated the UI to consume new endpoints in order to display new deals.
    Technologies: RealmSwift, Firebase iOS SDK, Google iOS SDK, Model View Viewmodel (MVVM), Carthage, GitFlow, Realm, Jira, SwiftLint, Fastlane, Xcode, Swift, iOS, CocoaPods, Fabric Design, ObjectMapper, R.swift, Alamofire, RxSwift, CircleCI
  • Lead iOS Developer

    2017 - 2018
    Itau: Bank App
    • Defined the app architecture and added user analytics.
    • Configured the integration server in CircleCI and Fastlane.
    • Coded most of the network and business layer for the app.
    • Developed a number of modules, including disputes, profile, and transaction history.
    • Integrated a third-party encryption tool into the app.
    Technologies: Firebase iOS SDK, GitFlow, SwiftLint, Fastlane, Xcode, Swift, iOS, CocoaPods, Crashlytics, Fabric, ObjectMapper, Zendesk, CircleCI
  • Lead iOS Developer

    2017 - 2017
    Sara: Personal Health Assistant
    • Started the app from scratch.
    • Set core architecture + core functionality to all API and user interactions.
    • Boosted API consumption with PromiseKit + Alamofire.
    • Used Core Location + MapKit to pinpoint locations near the app user.
    • Added a data layer to process all API information.
    • Contributed from the very first version until v1.9.1 posted Nov 2017.
    • Led the team once a new iOS dev joined the team.
    • Configured CircleCI server for automated builds with Fastlane.
    Technologies: Firebase iOS SDK, GitFlow, SwiftLint, Fastlane, Xcode, Swift, iOS, CocoaPods, Firebase Cloud Messaging (FCM), Crashlytics, Fabric, SnapKit, ObjectMapper, R.swift, Alamofire, PromiseKit, CircleCI
  • Senior iOS Developer

    2016 - 2017
    VU2
    • Optimized core performance.
    • Added new features like email login, Google login, block/unblock user, and improve user notifications.
    • Improved social network sharing.
    • Made several UI updates.
    • Fixed bugs.
    Technologies: GitFlow, SwiftLint, Fastlane, Xcode, Swift, iOS, CocoaPods, Google, Notification Center, JSON, Web Services, Facebook SDK, GCD, Auto Layout, Git
  • Senior iOS Developer

    2016 - 2017
    Daily Spot
    • Created an app from scratch.
    • Implemented in-app purchases.
    • Used PromiseKit with Alamofire to boost API requests.
    • Developed data syncing with the server.
    • Implemented the modularization of reusable views.
    Technologies: RealmSwift, Firebase iOS SDK, In-app Purchases, GitFlow, Realm, SwiftLint, Fastlane, Xcode, Swift, iOS, CocoaPods, Mixpanel, Crashlytics, Fabric, SnapKit, ObjectMapper, Alamofire, PromiseKit
  • Senior iOS Developer

    2016 - 2016
    7 Minute Prayer Challenge
    • Made general stability and performance improvements to this iOS app.
    • Created a custom player module.
    • Added Sync prayers module.
    • Fixed general bugs and made code improvements to the codebase.
    Technologies: Xcode, Objective-C, CocoaPods, Parse
  • Senior iOS Developer

    2014 - 2016
    CannonBall
    • Applied new layouts and solved UI issues.
    • Used EKEventStore to sync events in the calendar.
    • Implemented iOS enhancements.
    • 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: Xcode, Objective-C, Crashlytics, TestFlight, JSON API, Web Services, Core Foundation, Scrum
  • Senior iOS Developer

    2013 - 2013
    Paktor
    • 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: Xcode, Objective-C, Automation
  • Senior iOS Developer

    2013 - 2013
    Patrolife
    • 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: MapKit, Xcode, Objective-C, CocoaPods

Experience

  • VarageSale: Buy & Sell (Development)
    https://apps.apple.com/mx/app/varagesale-buy-sell/id622859960?l=en

    I have been involved in a number of improvement and new features, including:

    - Deal feature: Update the UI and consume new endpoints in order to display deals
    - Swift 4 migration
    - Support added for iPhone X
    - Firebase SDK integration: Analytics, AdMob, and messaging
    - Multiple stability and performance fixes

  • Sara: Personal Health Assistant (Development)

    This app is a personal health assistant where you can schedule medical exams on a particular time on a particular facility based on your geolocation. Sara will provide all the information for the medical exam and will let you know when your results are ready. I started this app from scratch and then became the team leader once a new iOS dev joined the team.

    Note: I worked from the very first version until v1.9.1 posted Nov 2017

  • Daily Spot (Development)

    I went solo on this one and started it from scratch. This app is a fitness assistant; it will give you information about exercises illustrated by images or audio leading you about how to work out properly in order to get all the info you need to subscribe to the fitness program.

    Note: I worked from the very first version until v3.5 posted Aug 2017

  • CannonBall (Development)

    Cannonball turns your calendar into a social streaming app. It adds large images to your calendar events along with great extras like Facebook birthdays with links to friends' walls, directions, check-ins, and more.

  • 7 Minute Prayer Challenge (Development)

    An app that I helped improve. I added general stability and performance improvements, created a custom player module, and added Sync prayers module.

  • Patrolife (Development)
    https://itunes.apple.com/app/id506624675

    An app that I helped to update and localize. I implemented full iOS7 support, wrote a submodule to handle internet connection outages, added Russian localization, solved UI issues stemming from the operation system update, and improved GPS monitoring.

  • Paktor (Development)
    https://apps.apple.com/mx/app/paktor-make-new-friends/id654972611?l=en

    My general contributions include iOS 7 migration and compatible enhancements, extend messages module by implementing new UI/Layou, improve the match card animation and general UI en enhancements, refactoring and bug fixing.

Skills

  • Languages

    Objective-C, Swift, GraphQL
  • Platforms

    iOS
  • Libraries/APIs

    PromiseKit, CocoaPods, Facebook SDK, Firebase iOS SDK, RxSwift
  • Tools

    Fastlane, Xcode, SwiftLint, TestFlight, CircleCI, Jira, iOS Instruments
  • Paradigms

    Scrum, Model View Viewmodel (MVVM)
  • Frameworks

    RealmSwift, Core Location, AV Foundation
  • Storage

    Realm
  • Other

    In-app Purchases, R.swift, GitFlow, Stripe iOS SDK, Google iOS SDK, Carthage

Education

  • Bachelor's degree in Computer Systems Engineering
    2002 - 2007
    Technological Institute of Hermosillo - Sonora, Mexico

To view more profiles

Join Toptal
Share it with others