Jamie C. Arellano, Developer in Westminster, CO, United States
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Jamie C. Arellano

Verified Expert  in Engineering

Mobile Developer

Westminster, CO, United States
Toptal Member Since
May 5, 2020

Jamie has been developing Android applications since version 0.9, before the release of the first Android device. For over a decade, he has developed projects with cutting-edge technologies for clients from all over the world. A few highlights are multiple mobile wallets leveraging different solutions built from the ground up, ride-sharing solutions for drivers and passengers, and enterprise-level location tracking solutions.



Preferred Environment

MacOS, Xcode, Android Studio, iOS, Android

The most amazing...

...projects I've worked on have involved mobile payment solutions for small independent restaurants as well as some of the world's largest businesses.

Work Experience

Mobile Software Engineer

2018 - PRESENT
Trimble Visibility
  • Developed a cross-platform, enterprise-level, tracking solution for shipments.
  • Maintained both platforms using native code; Swift on iOS and Kotlin/Java on Android.
  • Handled all DevOps-related tasks including maintaining the store presence and any release processes.
Technologies: Android Studio, Xcode, Java, Kotlin, Swift

Android Developer

2016 - 2017
  • Maintained the Android passenger and driver applications.
  • Responsible for bug fixes and new feature implementations.
  • Created real-time solutions for driver-and-passenger communication using push notifications.
Technologies: Android Studio, Java

Android Developer

2012 - 2017
Freelance Consulting
  • Maintained various legacy projects for many clients.
  • Developed solutions from the ground up for multiple clients.
  • Worked on various projects ranging from warehouse inventory, mobile payments, to loyalty-and-reward programs. (Many of them are confidential and under NDAs).
Technologies: Java, Android Studio

Android Developer

2010 - 2012
Zenius Solutions
  • Competed and was awarded the top innovation prize in the Disruptathon Mobile Enterprise competition for an NFC-based mobile wallet solution (2011). Hosted by CTIA Enterprise and Applications in San Diego, CA.
  • Responsible for the UI and server functionality for the mobile wallet and M-Transact.
  • Created a cross-platform solution with code reviews to keep everything in sync.
Technologies: Objective-C, iOS, Java, Android


I've helped maintain the Android app for Vail Resorts off and on over the last few years. My work has primarily involved feature requests, social network integrations, custom push notifications, and bug fixes.

Visibility Drive

I was responsible for both Android and iOS applications for an enterprise-level shipment-tracking and final mile solution. The Android app is currently being migrated to Kotlin and the iOS version was recently redone in Swift. I was also responsible for every aspect of both codebases as well as maintaining the store presence. I also deployed the test builds on each platform for QA.


Ride FARE was a ride-sharing application that provided the same service like Uber and Lyft. It was available in Austin Texas. I maintained the Android passenger and driver applications and was responsible for bug fixes and new feature implementations.


Java, Kotlin, Swift, Objective-C


Android SDK


Android Studio, Xcode, Adobe Illustrator


Mobile App Design


iOS, Firebase, Android, MacOS

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