Pablo is available for hire
Hire PabloPablo Ariel Schulklapper
Verified Expert in Engineering
iOS Developer
Maribor, Administrative unit Maribor, Slovenia
Toptal member since August 12, 2016
Bio
Pablo is a senior iOS developer and has developed the iOS app PDF Reader Pro Edition, which is frequently ranked in the top 10 for business on the iPad App Store. 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
USBC
iOS, Swift, Xcode, SwiftUI, Combine, Model View ViewModel (MVVM), PostgreSQL...
Ethos Social Network
Swift, SwiftUI, iOS, Firebase, Model View ViewModel (MVVM), Xcode...
Wearsafe Labs
iOS, Swift, Jenkins, MySQL, Apple Watch, SwiftUI, Xcode, Siri, 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
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 in the Business category on the App Store for iPad.
Work Experience
iOS Developer
2023 - 2026
USBC
- Developed the USBC Tokenized Deposit iOS app, a non-custodial crypto wallet focused on the USBC stablecoin and other popular cryptocurrencies.
- Added new screens for wallet transactions using SwiftUI and Combine, consuming REST API endpoints with Alamofire, and using WebSockets for real-time communication between client and back end.
- Estimated effort for new tasks and provided subtask breakdowns. Developed new features from scratch to release. Provided technical feedback and delivery dates to product owners and stakeholders.
Technologies: iOS, Swift, Xcode, SwiftUI, Combine, Model View ViewModel (MVVM), PostgreSQL, WebSockets, REST, Automated Testing
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/id364502063Ranked 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@N03/53322835377I 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-t6YhMTWoIn 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.
USBC Tokenized Deposit iOS app
https://apps.apple.com/us/app/usbc-deposit-token/id1439340119A crypto wallet for the USBC stablecoin and other cryptocurrencies like Bitcoin, Solana, and XRP. I worked on the iOS app, calling REST endpoints and handling WebSocket events from the back end. The UI was coded in SwiftUI.
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, PostgreSQL
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, WebSockets
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