I am Daniel Lozano, a Senior Mobile Engineer with over 11 years of experience delivering scalable iOS and Android applications using Swift, Kotlin, and modern mobile architectures. I design robust, high-performance apps that provide delightful, intuitive user experiences even under heavy user loads. I collaborate with cross-functional teams to deliver apps that blend technical excellence with polished UX. My background spans cloud integration, real-time data sync, and payments, with strong focus on CI/CD, monitoring (Firebase, Crashlytics, Sentry), and release processes for App Store and Google Play. I also contribute to backend services with Node.js, Express, and Python to streamline client-server integration.

Daniel Lozano

I am Daniel Lozano, a Senior Mobile Engineer with over 11 years of experience delivering scalable iOS and Android applications using Swift, Kotlin, and modern mobile architectures. I design robust, high-performance apps that provide delightful, intuitive user experiences even under heavy user loads. I collaborate with cross-functional teams to deliver apps that blend technical excellence with polished UX. My background spans cloud integration, real-time data sync, and payments, with strong focus on CI/CD, monitoring (Firebase, Crashlytics, Sentry), and release processes for App Store and Google Play. I also contribute to backend services with Node.js, Express, and Python to streamline client-server integration.

Available to hire

I am Daniel Lozano, a Senior Mobile Engineer with over 11 years of experience delivering scalable iOS and Android applications using Swift, Kotlin, and modern mobile architectures. I design robust, high-performance apps that provide delightful, intuitive user experiences even under heavy user loads.

I collaborate with cross-functional teams to deliver apps that blend technical excellence with polished UX. My background spans cloud integration, real-time data sync, and payments, with strong focus on CI/CD, monitoring (Firebase, Crashlytics, Sentry), and release processes for App Store and Google Play. I also contribute to backend services with Node.js, Express, and Python to streamline client-server integration.

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Language

English
Fluent

Work Experience

SENIOR MOBILE ENGINEER at PELOTON
December 1, 2023 - Present
Built new iOS/Android features in React Native + TypeScript, integrated with Swift/Kotlin native modules for performance-sensitive logic. Optimized rendering by enabling Hermes and adopting React Native’s New Architecture, cutting load times by 30%. Implemented offline-first caching with AsyncStorage + SQLite, improving reliability of workout tracking in low connectivity. Automated deployments with Fastlane + GitHub Actions, pushing weekly builds to TestFlight and Google Play. Integrated Firebase Crashlytics and Sentry for monitoring, reducing crash rates by 25% through proactive bug resolution. Used Flipper for debugging performance bottlenecks and optimizing React Native bridge communication. Implemented Redux and Context API for complex state management across fitness tracking and streaming modules. Wrote integration and end-to-end tests with Jest and Detox. Mentored junior engineers on RN best practices.
Senior Mobile Engineer at Clics
April 1, 2019 - November 1, 2023
Built a salon management app from scratch using Swift (UIKit → SwiftUI) and Kotlin (Jetpack Compose). Implemented offline caching with CoreData/Realm, modular networking for REST and Shopify GraphQL, and secure payments via Stripe, Apple Pay, and Braintree. Migrated iOS codebase to SwiftUI, introduced RxSwift for reactive bindings, and integrated Shopify for inventory and purchases. Added Firebase Analytics/Crashlytics and Sentry monitoring; supported backend with Node.js middleware and Python scripts for data cleanup and API testing.
Mobile Engineer at Nordstrom
December 31, 2013 - February 28, 2019
Delivered large-scale iOS retail apps handling millions of transactions; introduced Swift into an Objective-C codebase and migrated to MVVM/Clean Architecture. Implemented lazy-loading for product catalogs, optimized image caching, and integrated Shopify GraphQL for real-time product/inventory sync. Built automated test suites (XCTest, XCUITest, Espresso) and contributed to backend microservices (AWS Lambda with Node.js, Python scripting) for automation. Implemented Apple Pay/PayPal across Swift and Kotlin clients.

Education

Bachelor's Degree in Computer Science at University of Tennessee
January 1, 2009 - January 1, 2013

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Retail, Professional Services, Financial Services