Pablo is available for hire

Pablo Ariel Schulklapper

Verified Expert in Engineering

iOS Developer

Ljubljana, Slovenia

Toptal member since August 12, 2016

Expertise

Bluetooth iOS Xcode Agile Development Swift Objective-C Git Java C++MySQL Jenkins REST API Box

Bio

Pablo is a senior iOS developer and has coded the iOS app PDF Reader Pro Edition, which is frequently ranked in the top 10 for business on the App Store for iPad. He has done 8,664 hours of work on Toptal, with excellent client feedback. He can adjust his working hours to fully coincide with the client's working hours. Pablo always tries to go the extra mile with his work and create beautiful apps.

Portfolio

Ethos Social Network

Swift, SwiftUI, iOS, Firebase, Model View ViewModel (MVVM), Xcode...

Wearsafe Labs

iOS, Swift, Jenkins, MySQL, Apple Watch, SwiftUI, Xcode, Siri, Git...

iTech Development Systems

UIKit, Xcode, Objective-C, Swift, iOS, PoDoFo, Core Data, Git...

Experience

iOS - 12 years
App Store Acceptance Process - 12 years
Xcode - 12 years
Git - 8 years
Swift - 8 years
Objective-C - 8 years
Automated Testing - 4 years
SwiftUI - 3 years

Availability

Part-time

Preferred Environment

Swift, iOS, SwiftUI

The most amazing...

...app I've coded is the PDF Reader Pro Edition for iOS, ranked in the top 10 for business on the App Store for iPad.

Work Experience

iOS Developer

2023 - 2023

Ethos Social Network

Worked on the Ethos iOS app, a social network to connect with friends and talk about social causes.
Coded a new user interface using SwiftUI. Added calls to the back end using Firebase Cloud Functions. Implemented the source code following the MVVM architecture.
Worked on an app that was crashing frequently because it had big memory leaks. Used the Instruments app to track the memory allocation and fix those leaks.

Technologies: Swift, SwiftUI, iOS, Firebase, Model View ViewModel (MVVM), Xcode, Automated Testing, Mobile UX

iOS Developer

2019 - 2023

Wearsafe Labs

Developed an iOS app that allowed users to send emergency alerts to their contacts and the police.
Coded the app in Swift. Implemented the user interface with SwiftUI and UIKit. Used Alamofire to call the back-end API endpoints.
Implemented connections via Bluetooth to the Wearsafe SOS button.
Reviewed other developers' code. Conducted technical interviews when hiring new iOS developers.
Developed an iOS SDK that allowed other apps to offer insurance products to their users. The SDK was distributed to other companies via a private CocoaPod.

Technologies: iOS, Swift, Jenkins, MySQL, Apple Watch, SwiftUI, Xcode, Siri, Git, Automated Testing, App Store Acceptance Process, Android, Bluetooth, Internet of Things (IoT), Combine, REST, Model View ViewModel (MVVM), Google Analytics, Java, VIPER Architecture, Test-driven Development (TDD), Unit Testing, UI Testing, Continuous Integration (CI), Continuous Delivery (CD), iPhone, Figma, User Interface (UI), User Experience (UX), Widgets, UI Animation, Core Animation, Core Bluetooth, CocoaPods, JavaScript, Viper, Architecture, Mobile UX, REST APIs, Web UX, AVFoundation, HTML, CSS

iOS Developer

2010 - 2019

iTech Development Systems

Coded the iOS app PDF Reader Pro Edition, frequently ranked Top 10 for Business on the App Store for iPad. Developed the app using Swift and Objective-C.
Implemented PDF viewing, annotations, forms, browsing, download and upload via cloud services like Dropbox, opening password-protected PDF files, and an encrypted vault folder to store confidential files, accessible via password, Touch ID, or Face ID.
Used PoDoFo to parse and store changes to the PDF files.
Managed memory and thread synchronization to prevent leaks or race conditions when opening large files.
Coded a Java back end to enable online collaboration between users using WebSockets.

Technologies: UIKit, Xcode, Objective-C, Swift, iOS, PoDoFo, Core Data, Git, Automated Testing, App Store Acceptance Process, Image Processing, C++, Java, Test-driven Development (TDD), Unit Testing, UI Testing, Continuous Integration (CI), Continuous Delivery (CD), AVPlayer, iPhone, User Interface (UI), User Experience (UX), UI Animation, Core Animation, CocoaPods, Swift 4, Mobile UX, Core Image, AVFoundation

iOS Developer

2016 - 2017

Round Pegs

Built an iOS app to be used as an MVP for a diagnostic medicine company. The app's purpose was to allow patients to manage their medical exams.
Developed the app using Swift. Implemented code to consume REST APIs from the back end with Alamofire.
Used the Google Maps SDK to show the closest laboratories to the patient.

Technologies: iOS, Swift, Firebase, Git, iPhone, User Interface (UI), User Experience (UX), CocoaPods

Java Developer

2005 - 2007

Idea Factory Software

Coded a Java web app to be used by the government of Argentina to manage tax revenue. The team consisted of a project manager and seven programmers.
Implemented the front end with JSP and the back end with Hibernate.
Designed tax and business reports with JasperReports.

Technologies: Java, Oracle Database, JasperReports

Experience

PDF Reader Pro Edition iOS App

https://apps.apple.com/us/app/pdf-reader-pro-edition/id364502063

Ranked Top 10 for Business on the App Store for iPad. A popular iOS app to read and annotate PDF files. I coded it on Swift and Objective-C and implemented features like PDF viewing and annotations, file management, Apple pencil support, and integrations with iCloud and Dropbox. I used PoDoFo to parse and store changes to the PDF files.

PDF Reader Pro Edition iOS App | Ranking

https://www.flickr.com/photos/199504713@N03/53322835377

I coded this app when I was working at iTech Development Systems. The ranking from the PDF Reader Pro Edition displayed on the App Store for iPad is usually very high. Attached is a screenshot showing the app ranked sixth for Business on the App Store.

Demonstration | Running PDF Reader Pro Edition from Source Code into the iOS Simulator

https://www.youtube.com/watch?v=tQ-t6YhMTWo

In this video, I demonstrated the PDF Reader Pro Edition by launching the app from the source code into the iOS Simulator using Xcode. This app is frequently ranked Top 10 for Business on the App Store for iPad.

Ethos Social Network

A social network iOS app to connect with friends and talk about social causes. I coded a new user interface using SwiftUI and added API calls to the back end using Firebase functions. I implemented the source code following the MVVM architecture.

Education

2003 - 2008

Bachelor's Degree in Information Systems Engineering

Universidad Tecnológica Nacional - Buenos Aires, Argentina

Skills

Libraries/APIs

Core Animation, CocoaPods, REST APIs, Core Image, JasperReports

Tools

Xcode, Jenkins, Git, Google Analytics, AVPlayer, Figma

Languages

Swift, Objective-C, Java, C++, Swift 4, HTML, CSS, JavaScript

Frameworks

UIKit, SwiftUI, Core Data, Core Bluetooth, iOS SDK, Combine, Viper

Paradigms

Automated Testing, Mobile Development, REST, Model View ViewModel (MVVM), VIPER Architecture, Test-driven Development (TDD), Unit Testing, Continuous Integration (CI), Continuous Delivery (CD)

Platforms

iOS, Apple Watch, Firebase, Oracle Database, Android

Storage

MySQL

Other

PoDoFo, Siri, App Store Acceptance Process, Image Processing, Bluetooth, UI Testing, iPhone, User Interface (UI), User Experience (UX), UI Animation, iPad, Architecture, Mobile UX, Web UX, AVFoundation, Widgets, Internet of Things (IoT), Social Networks

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring