I helped modernize large Square libraries used by all iOS developers at Square.

• Helped move all of Square's applications to a modern networking library
• Added Swift concurrency support to multiple libraries in the networking stack
• Helped to add Swift concurrency support to state management library
• Helped migrate Square Appointments app from cleanse DI framework to a new modern DI framework.

In 2021 I helped enhance an athlete glucose monitoring app.

• Migrated the app from RxSwift to Combine
• Helped create a training feature using SwiftUI/Combine.

In 2019/20 I helped create and launch the Voice blockchain based social media iOS app.

• Feed - I created the main feed in Voice using Combine and Apollo. 
• Comments - Created the comment system for Voice using Combine and EOSIO blockchain transactions.
• EOSIO SDK - Added Combine support to EOSIO Swift SDK.  Enhanced the SDK with support for fetching blocks by id.

I helped re-write Doximity's main application in Swift.

In 2017 I helped combine Doxmity's dialer app into their original main application.

• Feed - I created the News Feed feature in the product.  Texture was used for the UI to provide asynchronous UI sizing of dynamic feed cells.  This provided a performant smooth scrolling feed.
• GraphQL - GraphQL was used for all the features I wrote in the Swift rewrite.  Apollo and ReactiveSwift was used for data fetching.

In 2010 I helped create the client product on iOS in Objective C.

In 2016 I was the sole contributor on re-writing the iOS product in Swift.

• Content Synchronization - Synchronizing encrypted content using NSURLSession via REST web service communication.
• Content Playback - Created a content engine which rendered content dynamically using UIKit.

• Encryption - Used openssl crypto to allow RSA decryption with .net provided public key.  Common crypto was used for AES symmetrical encryption.

• Kiosk functionality - Added a runtime mode to the product that allowed it to be used in a kiosk environment, including updating while running 24/7.

• Helped re-write the product from scratch in 2001 in .NET Windows Forms using C#.
• Developed core functionality for the ACT! product, including the Groups, Companies, Lookups and Dashboard features.
• Designed and implemented custom tables functionality for the ACT! SDK.

• Web development using ASP, C++ ISAPI and some ASP.net in C#.

• Developed e-commerce online ordering system for bookstore with C++/ASP.

• Developed TCP/IP communication server that transferred GPS data for vehicles using C++/MFC.

• Re-factored C++ Sql Engine to be usable by a Java front end.
• Researched and developed image display and retrieval from Informix database in Sql Editor Product.

• Co-Developed OS/2 Presentation Manager credit card collections system in C.