Open to opportunities

Mahim User

@mahimuser

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Lead mobile app developer specializing in cross-platform and native solutions.

United States

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What I'm looking for

I seek a lead engineering role building scalable, user-centric mobile apps with strong CI/CD, mentorship, and product collaboration.

I am a results-oriented senior mobile application developer with over 8 years of experience building high-performance iOS and Android apps. I specialize in both cross-platform frameworks (Flutter, React Native) and native technologies (Swift, Kotlin), with strong knowledge of architecture patterns like MVVM and BLoC.

In my current role as Lead Mobile Developer at Bureau Inc., I led end-to-end development of flagship apps, drove a 30% increase in daily active users, and implemented cross-platform architectures that achieved 80% code reusability. I champion CI/CD with GitHub Actions and Fastlane, moving releases from bi-weekly to daily.

Previously, as a Senior Mobile Developer at Databrick, I improved charger-discovery accuracy by 25% and reduced render latency by 20% through profiling and asynchronous loading. I also established testing and offline caching strategies and increased re-engagement via push and deep-linking.

I mentor and lead engineering teams, promoting code reviews, pair programming, and test coverage; I am committed to accessible, maintainable mobile solutions that balance performance, usability, and rapid delivery.

Experience

Work history, roles, and key accomplishments

Current

Lead Mobile App Developer

Current

Bureau Inc.

Jul 2022 - Present (3 years 2 months)

Led end-to-end development of flagship iOS and Android apps, increasing daily active users by 30% and reducing time-to-market by 50% through cross-platform architectures and CI/CD automation.

Flutter React Native MVVM Combine Coroutines GitHub Actions)Fastlane CI CD Accessibility

Senior Mobile Developer

Databrick

Jun 2020 - Jun 2022 (2 years)

Led development of an EV-charger discovery app using Kotlin and Swift, improving charger accuracy by 25% and reducing render latency by 20% through profiling and offline caching.

Kotlin Swift Retrofit Moshi Alamofire Junit Espresso XCTest

Mobile Developer

Twilio Inc.

May 2019 - May 2020 (1 year)

Developed cross-platform React Native modules and standardized UI components, integrated Firebase services to improve app reliability and analytics for internal tools.

React Native Firebase UI Components Authentication Analytics

Junior Mobile Developer

Zocks

Jun 2017 - Apr 2019 (1 year 10 months)

Contributed to iOS and Android apps using Cordova and early React Native, improving hybrid app stability and supporting the team's transition from Waterfall to Agile.