Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a Senior Mobile Developer with over 10 years of experience in building scalable and high-performance mobile applications across healthcare, finance, retail, and enterprise domains. I specialize in iOS development using Swift, SwiftUI, and UIKit, along with cross-platform development using React Native and TypeScript. I also have experience with Android development using Kotlin and Jetpack Compose. In my previous projects, I worked on enterprise-level applications where I was responsible for mobile architecture, API integration, authentication, performance optimization, CI/CD implementation, and App…I am a Senior Mobile Developer with over 10 years of experience in building scalable and high-performance mobile applications across healthcare, finance, retail, and enterprise domains. I specialize in iOS development using Swift, SwiftUI, and UIKit, along with cross-platform development using React Native and TypeScript. I also have experience with Android development using Kotlin and Jetpack Compose. In my previous projects, I worked on enterprise-level applications where I was responsible for mobile architecture, API integration, authentication, performance optimization, CI/CD implementation, and App

Sreeja Keesari

App Developer, Web Developer, Front-End Developer, +2





I am a Senior Mobile Developer with over 10 years of experience in building scalable and high-performance mobile applications across healthcare, finance, retail, and enterprise domains. I specialize in iOS development using Swift, SwiftUI, and UIKit, along with cross-platform development using React Native and TypeScript. I also have experience with Android development using Kotlin and Jetpack Compose. In my previous projects, I worked on enterprise-level applications where I was responsible for mobile architecture, API integration, authentication, performance optimization, CI/CD implementation, and App…I am a Senior Mobile Developer with over 10 years of experience in building scalable and high-performance mobile applications across healthcare, finance, retail, and enterprise domains. I specialize in iOS development using Swift, SwiftUI, and UIKit, along with cross-platform development using React Native and TypeScript. I also have experience with Android development using Kotlin and Jetpack Compose. In my previous projects, I worked on enterprise-level applications where I was responsible for mobile architecture, API integration, authentication, performance optimization, CI/CD implementation, and App

Available to hire

I am a Senior Mobile Developer with over 10 years of experience in building scalable and high-performance mobile applications across healthcare, finance, retail, and enterprise domains. I specialize in iOS development using Swift, SwiftUI, and UIKit, along with cross-platform development using React Native and TypeScript. I also have experience with Android development using Kotlin and Jetpack Compose. In my previous projects, I worked on enterprise-level applications where I was responsible for mobile architecture, API integration, authentication, performance optimization, CI/CD implementation, and App

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Sr Mobile Developer (iOS / Android) at CVS Health

January 1, 2025 - Present

Designed and developed scalable healthcare mobile applications using Swift, SwiftUI, and UIKit; architected modular MVVM-based iOS layers; built reusable UI modules with Core Animation and Core Graphics; implemented GraphQL data communication using Apollo Client; developed cross-platform features with React Native (TypeScript); built Android interfaces with Kotlin and Jetpack Compose; integrated AI-powered personalization with CoreML and Azure Cognitive Services; created analytics visuals with React Native TypeScript modules; implemented RESTful APIs and GraphQL endpoints for secure authentication, prescriptions, and real-time data sync; integrated Redux for predictable app state; automated UI and functional testing for Android with Espresso; maintained macOS utilities with SwiftUI/AppKit; enhanced navigation with UIKit components; collaborated with Node.js microservices and WebSocket services for real-time health alerts.

Sr Mobile Developer (iOS / Android) at American Express

March 1, 2023 - December 1, 2024

Developed secure mobile payments and financial services apps aligned with PCI-DSS, PSD2, and GDPR; engineered modern iOS interfaces with SwiftUI and UIKit; migrated legacy JavaScript modules to TypeScript; designed Android banking apps using Kotlin with Clean Architecture; integrated with ASP.NET Core and .NET microservices for payments, authentication, and card management workflows; implemented secure local storage (Keychain, Core Data); supported OAuth 2.0 authentication for SDK integrations; designed GraphQL-backed account summaries and transaction dashboards; automated Android UI testing with Espresso; integrated Apple Push Notification Services (APNs) for real-time alerts.

Mobile Developer (iOS / Android) at HD Supply

September 1, 2020 - February 1, 2023

Designed scalable iOS shopping experiences using Swift and UIKit; implemented OAuth authentication; built cross-platform commerce features with React Native/TypeScript and Redux; defined GraphQL schemas and optimized queries with backend teams; leveraged Core Bluetooth for warehouse wearables and inventory scanners; implemented AI-driven product recommendations via backend ML services; designed offline support with Core Data for catalogs, carts, and order histories; developed Android interfaces with Jetpack Compose and Kotlin; practiced TDD with JUnit and Espresso; integrated .NET Core backend microservices; built reusable React Native components with native SwiftUI modules; secured APIs with token-based authentication.

iOS Developer at CA Technologies

May 1, 2015 - December 1, 2017

Developed secure iOS features using Swift and Objective-C; implemented MVC patterns; integrated HealthKit for health metrics; collaborated with backend to integrate .NET-based microservices; implemented real-time video with WebRTC and AVFoundation; connected with BLE devices for wearable data; built macOS companion tools with AppKit/Keychain; collaborated with Android teams on Kotlin coroutines and GraphQL data exchanges; worked with FHIR/HL7 healthcare interoperability standards.

iOS Developer at Liberty Mutual

September 1, 2018 - August 1, 2020

Developed secure iOS features using Swift/Objective-C; implemented MVC-based architecture; integrated HealthKit, Core Data, and secure token storage; built dashboards and mobile health features; collaborated with backend on Azure-hosted .NET microservices; implemented WebRTC video features; integrated BLE for wearables; developed cross-platform components with React Native; implemented GraphQL queries for real-time data access; supported HIPAA-aligned security and healthcare data handling.

Sr Mobile Developer (iOS / Android) at CVS

January 1, 2025 - Present

Designed and developed scalable healthcare mobile applications using Swift, SwiftUI, and UIKit; MVVM architecture; GraphQL with Apollo Client; cross-platform features using React Native with TypeScript; Android interfaces with Kotlin and Jetpack Compose; AI-powered personalization with CoreML and Azure Cognitive Services; Redux-based analytics modules; RESTful and GraphQL endpoints; automated UI and functional testing for Android with Espresso; macOS utilities to support internal teams; advanced navigation flows and real-time health alerts via WebSocket-based services.

Sr Mobile Developer (iOS / Android) at Amex

March 1, 2023 - December 1, 2024

Developed secure mobile payment and financial service apps aligned with PCI-DSS, PSD2, and GDPR; built iOS UI with SwiftUI/ UIKit; migrated legacy JavaScript modules to TypeScript for shared React Native components; created Android banking features with Kotlin following Clean Architecture; integrated with ASP.NET Core microservices for payments and card management; implemented secure local storage (Keychain, Core Data); OAuth 2.0 authentication; APNs for real-time alerts; cross-platform React Native components; GraphQL-based data retrieval for accounts and transactions; automated Android UI tests with Espresso.