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Muhammad Zubair User

@muhammadzubairuser

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Senior Mobile Developer at Firsty, delivering Flutter apps and native one-click eSIM installation.

Germany

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At Firsty, I contributed to product ideation that helped secure $1.2 million in funding. I designed and implemented the core Flutter application architecture, including native one-click eSIM installation and real-time data synchronization.

At Medflex, I designed and built mobile applications for Android and iOS. I worked with the backend team to improve APIs, features, and overall system performance.

At Virtual Proz, I led teams building and publishing Android and iOS applications, and met with customers and prospective business partners to explore new markets and technology. For Zoundio, outsourced by Virtual Proz, I built the Android version of the Amped app in Kotlin and created a guitar frequency detection algorithm in C++.

Experience

Work history, roles, and key accomplishments

Current

Senior Mobile Developer

Current

Firsty

Jun 2023 - Present (3 years 4 months)

Contributed to product ideation and helped secure $1.2M in funding. Managed the mobile development team and designed the core application architecture in Flutter, delivering native eSIM installation, authentication, and real-time data synchronization.

Flutter Dart ESIM Authentication Real time Data Synchronization Security Third Party Integrations Team Leadership Architecture

Senior Mobile Application Developer

Medflex

Jan 2022 - Jun 2023 (1 year 5 months)

Designed and built mobile applications for Android and iOS platforms, ensuring performance, quality, and responsiveness. Collaborated with the backend team to improve APIs and overall system performance.

Android iOS Performance Optimization API Collaboration

Team Lead / Consultant

Virtual Proz

Jun 2015 - Dec 2021 (6 years 6 months)

Led teams to design, build, and publish applications for Android and iOS platforms. Collaborated with cross-functional teams and met with customers to explore new markets and technology strategy.

Team Leadership Android iOS Cross Functional Collaboration Client Management

Senior Mobile Application Developer

Zoundio

Oct 2019 - Dec 2020 (1 year 2 months)

Built the Android version of the Amped (Gibson Guitar) app in Kotlin. Participated in project planning, sprint planning, daily scrums, and sprint reviews, and contributed to multiple codebases by establishing common design patterns.

Kotlin Android Agile Scrum Design Patterns

Mobile Developer

Eiconix IT Technologies

Jun 2013 - May 2015 (1 year 11 months)

Analyzed business requirements and provided development estimates and feedback. Tested, debugged, and maintained applications across the mobile development lifecycle, collaborating with cross-functional teams.

Mobile Development Testing Debugging Requirements Analysis