Hai T. Nguyen

817-***-****

ad2ayg@r.postjobfree.com

Professional Summary

With over 30 years of experience in diverse roles spanning Management, Architecture, and Lead Development. I possess a proven track record of building iPhone/iPad/Android mobile applications and web apps. Proficient in best practices, mentoring, and motivating junior developers to enhance productivity and job performance. Highly skilled in troubleshooting, problem-solving, investigating root causes, and successfully optimizing and refactoring applications.

Work History

Dialexa, an IBM Company - Software Engineering Manager Dallas, TX

06/2021 – Current

● Managed a team to build an AI System called Generative UI written in NextJS integrating with Azure OpenAI API (Generative AI); The App used custom model to generate custom code as well as DALL-E for custom image generation; Managed releases and deployed Docker image to an Azure container.

● Led and managed a team of eight iOS developers on a project (2/23-08/23) to implement in-app social features (like Facebook), loyalty and redemption programs, onboarding, and events management for the Harley Davidson App.

● Took ownership of managing PR pipelines, conducting code reviews, approving, and merging code into the master branch.

● Oversaw the end-to-end CI/CD process, including Staging, TestFlight, and Production builds, ensuring successful for iOS App Store releases.

● Organized and chaired weekly development synchronization meetings and provided status reports in management meetings.

● Served as Team Lead (9/22-2/23) on a new cross-platform app development (iOS and Android) for MyNilPay.com, utilizing GraphQL for data management, and Kotlin Multiplatform (KMM) HN

architecture with a unified code base with deployment to AWS;

● Implemented features such as fans and athletes’ management, and integrated Stripe for donations processing.

● Managed daily JIRA activities, pull requests (PRs), and team meetings between iOS and Android squads.

● Contributed as Senior iOS Engineer (6/21-9/22) at Dexcom Corporation, focusing on building IOS feature sets for the new G7 Glucose Monitoring product.

● Integrated iWatch device monitoring and developed an IOS Widget for quick access using SwiftUI and CryptoKit framework.

● Acted as mentor to junior developers and assist in daily pair programming activities. Signify Health - Sr. IOS Developer

Dallas, TX

07/2019 – 06/2021

● Developed and maintained Signify CareConsult iPad application, utilized by doctors to conduct health assessments with their patients.

● Utilized Xcode 12+/ Swift 5.0+ along with using IOS Frameworks including UIKit, SwiftUI/Combine, PDFKit, AVFoundation, and Core Data to build the application.

● Managed code using Git/BitBucket and implemented XCTest for unit and automation testing.

● Employed Agile methodologies (Scrum) for effective work planning and management. CenturyLink - Lead Senior IOS Developer

Dallas, TX

05/2018 - 06/2019

● Led a team of 6 developers in the creation of an Enterprise IOS Application named TechXpert, designed to support technicians conducting installation and troubleshooting on customer sites.

● Successfully applied Agile methodology, resulting in the on-time release of the first phase of the application

● Leveraged iPhone camera capabilities for barcode scanning, and integrated video playback and recording features for comprehensive record-keeping.

● Developed TechXpert using Swift, implementing MVVM architecture, and utilizing iOS Storyboard and Size Classes and `Vary for Traits` to ensure compatibility across all Apple mobile devices. Corduro – Manager / Architect / Lead Software Engineer Southlake, TX

10/2008 - 05/2018

● Co-founded and played pivotal role in the startup Corduro, funded by Google.

● Conceptualized and crafted Point of Sale (POS) system named PayMobile for iPhone and Register for iPad, effectively managing credit/debit card payment processing using Objective C and Swift.

● Leveraged various Apple frameworks such as OpenGLES and MultipeerConnectivity and incorporated third-party libraries including SensibleTableView, libiMagSDK, AFNetworking (JSON), and FBSDKs and Twitter framework for social connectivity.

● Collaborated with external hardware interfaces including credit card swipe (iMag/UniMag), barcode reader (Socket Mobile), and receipt printer (Star).

● Implemented an array of development, including Storyboards and AutoLayout, for seamless deployment to the App Store and TestFlight.

● Created a POS payment library (Objective C) to facilitate secure payment processing with credit/debit card processors TSYS and Fiserv, employing the Security framework for encryption/decryption.

● Managed a team of Android developers to ensure the consistence UI and user experience while developing PayMobile version for the Google Store, utilizing shared REST services.

● Contributed to the design and development of the mobile web application using C# to manage credit card payments at corduro.givemobile.com.

● Dedicated approximately 70% time to iOS development and 30% to .NET/C# development.

● Contributed significantly to the following App Store release:

• Corduro PayMobile

• Corduro Register

Employments at other companies including:

Microsoft, American Airlines, Siemens, General Dynamics Skills

● MVVM/Ribs/Clean Architectures

● XCODE 12+/Swift 5.0+, Objective- C, Cocoa Touch, GitHub, GitLab, BitBucket

● IOS SDK Frameworks - UIKit / SwiftUI / Combine / MapKit / Core Animation / AVFoundation / LocalAuthentication / CoreBluetooth / Core Data / Localization

● Best Practices Concepts / SOLID Principles / Design Patterns / Multi-Threading / Memory Management

● Carthage and Cocoa Pods Integration

● RESTful APIs (JSON/XML), Postman, SQL Server(Stored Procedures, Triggers) Education

University of Washington - Seattle, WA

Bachelor of Science: Computer Engineering (1988)

Certifications

AI-900 Microsoft Azure AI Fundamentals (Nov 2023- Cert ID: MS0995876772)

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